WO2023125144A1 - Optical wireless device, communication method, and communication system - Google Patents

Optical wireless device, communication method, and communication system Download PDF

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Publication number
WO2023125144A1
WO2023125144A1 PCT/CN2022/140329 CN2022140329W WO2023125144A1 WO 2023125144 A1 WO2023125144 A1 WO 2023125144A1 CN 2022140329 W CN2022140329 W CN 2022140329W WO 2023125144 A1 WO2023125144 A1 WO 2023125144A1
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Prior art keywords
optical
signal
downlink
wireless device
uplink
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PCT/CN2022/140329
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French (fr)
Chinese (zh)
Inventor
梁栋
张军平
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华为技术有限公司
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Publication of WO2023125144A1 publication Critical patent/WO2023125144A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H04B10/25752—Optical arrangements for wireless networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40—Transceivers

Definitions

  • the present application relates to the technical field of optical communication, and in particular to an optical wireless device, a communication method and a communication system.
  • Optical wireless communication technology is one of the important fields in wireless communication technology.
  • high-speed optical wireless communication systems are widely used in various communication scenarios such as single-user point-to-point, soft-input soft-output (Soft-Input Soft-Output, SISO).
  • SISO Soft-Input Soft-Output
  • an optical wireless terminal when it communicates uplink, it usually uses a corner reflector to retroreflect the optical signal sent by the base station to the base station, but the existing optical system based on the corner reflector does not have the function of downlink communication. Therefore, during downlink communication, additional receiving lenses and beam adjustment structures need to be configured for downlink optical signal reception, resulting in the inability to balance the requirements of miniaturization and high integration of optical wireless terminals with the requirements of uplink and downlink communication functions.
  • Embodiments of the present application provide an optical wireless device, a communication method, and a communication system, which can use a set of optical structures to implement uplink and downlink communication functions, reduce the complexity of the optical wireless device, and improve the integration of the optical wireless device.
  • an embodiment of the present application provides an optical wireless device, and the optical wireless device includes:
  • the first processing unit is configured to perform optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal; wherein the uplink optical signal and the second downlink optical signal are the The first downlink optical signal is divided into two optical signals, and the uplink optical signal is used for reflection back to the second optical wireless device;
  • the first transceiver unit is configured to acquire the second downlink optical signal and send a first downlink electrical signal.
  • the optical wireless device includes a first processing unit and a first transceiver unit.
  • the first processing unit in the optical wireless device is configured to perform optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal.
  • the first downlink optical signal is divided into at least two optical signals of an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal is used for reflection back to the second optical wireless device
  • the first The second optical wireless device may specifically be a device that sends the above-mentioned first downlink optical signal
  • the second downlink optical signal is used for the optical wireless device in this embodiment (the optical wireless device in this embodiment may also be referred to as the first optical wireless device, used to distinguish the second optical wireless device) from receiving by itself.
  • the first transceiver unit in the optical wireless device is configured to receive the second downlink optical signal, perform photoelectric change processing on the second downlink optical signal, and send the first downlink electrical signal.
  • a set of optical structures including but not limited to the first processing unit and the first transceiver unit can be used to realize the uplink and downlink communication functions of the optical wireless device at the same time, and can reduce the complexity of the optical wireless device and improve the optical efficiency. Integration of wireless devices.
  • the first processing unit includes:
  • the first downlink optical signal After passing through the at least one semi-transparent mirror, the first downlink optical signal is divided into a reflected optical signal and the second downlink optical signal.
  • the first processing unit includes at least one semi-transmissive mirror.
  • the principle of transmission and reflection of the semi-transmissive mirror is used, so that the first downlink optical signal is divided into a reflected optical signal and a second downlink optical signal after passing through the at least one semi-transparent mirror.
  • the second downlink optical signal is used for receiving by the optical wireless device in this embodiment, and the reflected optical signal is used for reflection back to the second optical wireless device.
  • the reflected optical signal needs to be modulated to obtain the above-mentioned uplink optical signal.
  • the uplink optical signal is then reflected back to the second optical wireless device, and the second optical wireless device may specifically be a device for sending the above-mentioned first downlink optical signal.
  • the received first downlink optical signal can be divided into a reflected optical signal and a second downlink optical signal by using the principle of transmission and reflection of a semi-transparent mirror, and the second downlink optical signal is used to realize the downlink communication function.
  • the reflected optical signal is used to realize the uplink communication function, so that the uplink and downlink communication functions of the optical wireless device can be realized simultaneously, and the complexity of the optical wireless device can be reduced, and the integration degree of the optical wireless device can be improved.
  • the first processing unit further includes:
  • An incident angle of the first downlink optical signal passing through the at least one lens is the same as an outgoing angle of the uplink optical signal passing through the at least one lens.
  • the first processing unit may include at least one lens in addition to at least one semi-transmissive mirror.
  • the incident angle of the above-mentioned first downlink optical signal passing through the at least one lens is the same as the exit angle of the above-mentioned uplink optical signal passing through the at least one lens, so that the incident light (first downlink optical signal) and the outgoing light
  • the emitted light (uplink optical signal) forms a complete optical communication circuit, which can realize the uplink and downlink communication functions of optical wireless equipment at the same time, and can reduce the complexity of optical wireless equipment and improve the integration of optical wireless equipment.
  • the first processing unit further includes:
  • An incident angle of the first downlink optical signal passing through the at least one total reflection lens is the same as an outgoing angle of the uplink optical signal passing through the at least one total reflection lens.
  • the first processing unit may include at least one total reflection lens in addition to at least one semi-transmissive mirror.
  • the incident angle of the above-mentioned first downlink optical signal passing through the at least one total reflection lens is the same as the exit angle of the above-mentioned uplink optical signal passing through the at least one total reflection lens, so that the incident light (the first downlink optical signal) Uplink optical signal) and outgoing light (uplink optical signal) form a complete optical communication circuit, which can realize the uplink and downlink communication functions of optical wireless equipment at the same time, and can reduce the complexity of optical wireless equipment and improve the integration of optical wireless equipment.
  • the first processing unit further includes:
  • the optical modulator is used to perform intensity modulation or phase modulation on the optical signal.
  • the first processing unit may further include a light modulator in addition to at least one semi-transmissive mirror.
  • the optical modulator is used to perform intensity modulation or phase modulation on the optical signal. Specifically, when the incident light (first downlink optical signal) passes through the optical modulator, the optical modulator performs the first downlink optical signal according to the received uplink electrical signal.
  • the optical signal is subjected to modulation processing such as light intensity modulation or phase modulation.
  • the modulated first downlink optical signal passes through at least one semi-transmissive mirror, is divided into a reflected optical signal and a second downlink optical signal, and passes through the optical modulator again in the process of reflecting the reflected optical signal back to the second optical wireless device,
  • the optical modulator performs modulation processing such as light intensity modulation or phase modulation on the reflected optical signal according to the received uplink electrical signal to obtain an uplink optical signal, and the uplink optical signal is reflected back to the second optical wireless device.
  • the optical modulator can be used to perform modulation processing such as light intensity modulation or phase modulation on the incident light and the outgoing light, so that the modulated second downlink optical signal effectively carries downlink data, and the modulated uplink optical signal
  • modulation processing such as light intensity modulation or phase modulation
  • the modulated second downlink optical signal effectively carries downlink data
  • the modulated uplink optical signal The uplink data is effectively carried, so that the uplink and downlink communication functions of the optical wireless device can be realized simultaneously, the complexity of the optical wireless device can be reduced, and the integration degree of the optical wireless device can be improved.
  • the first transceiver unit includes:
  • the fluorescence collector is configured to receive the second downlink optical signal and generate a fluorescence signal
  • the photodetector is used to photoelectrically change the fluorescent signal to obtain an electrical signal.
  • the first transceiver unit includes a fluorescence collector and a photodetector.
  • the fluorescence collector is used to collect the second downlink light signal, excite the fluorescence effect to generate the fluorescence signal, and transmit the fluorescence signal to the photodetector.
  • the fluorescent antenna is not sensitive to the incident direction of the optical signal and can realize large-area light collection. It can be better adapted to a large-area semi-transmissive mirror to achieve high-efficiency reception of the second downlink optical signal in various incident directions.
  • the photodetector is used to photoelectrically change the received fluorescent signal to obtain an electrical signal, which can be output as the above-mentioned first downlink electrical signal.
  • the first transceiver unit composed of the fluorescence collector and the photodetector can be used to realize high-efficiency reception of the second downlink optical signal in various incident directions and convert it into the first downlink electrical signal, Therefore, the downlink communication function is realized, and the complexity of the optical wireless equipment can be reduced, and the integration degree of the optical wireless equipment can be improved.
  • the first transceiver unit further includes:
  • the photodetector outputs a plurality of electrical signals after photoelectrically changing the plurality of fluorescent signals
  • the combiner is configured to combine the multiple electrical signals to output the first downlink electrical signal.
  • the first transceiver unit includes a fluorescence collector and a photodetector
  • the first transceiver unit may also include a combiner device.
  • each fluorescence collector receives the second downlink light signal transmitted by its corresponding semi-transparent mirror, and generates multiple fluorescence signals.
  • the photodetector outputs a plurality of electrical signals after photoelectrically changing the plurality of fluorescent signals.
  • the combiner is used to combine the multiple electrical signals to obtain the first downlink electrical signal.
  • a combiner can be used to combine multiple electrical signals into one electrical signal, so as to realize high-efficiency reception and photoelectric conversion of the second downlink optical signal, and improve the downlink communication efficiency of the optical wireless device.
  • the optical wireless device further includes:
  • the modulation and elimination unit is configured to perform modulation and elimination on the first downlink electrical signal according to the received uplink electrical signal to obtain a second downlink electrical signal.
  • the optical wireless device includes a modulation canceling unit in addition to the first processing unit and the first transceiver unit. Since the first downlink optical signal passes through the optical modulator during the process of obtaining the second downlink optical signal through optical signal processing, at this time the optical modulator measures the light intensity of the first downlink optical signal according to the received uplink electrical signal. Modulation processing such as modulation or phase modulation causes the modulation caused by the uplink electrical signal to be superimposed on the first downlink optical signal to form a second downlink optical signal with both downlink data and uplink data. This effect is called secondary modulation.
  • Modulation processing such as modulation or phase modulation causes the modulation caused by the uplink electrical signal to be superimposed on the first downlink optical signal to form a second downlink optical signal with both downlink data and uplink data. This effect is called secondary modulation.
  • the first downlink electrical signal obtained through the photoelectric conversion of the second downlink optical signal also has secondary modulation.
  • the modulation elimination unit in the optical wireless device is used to perform modulation elimination on the first downlink electrical signal according to the known uplink electrical signal, that is, cancel the secondary modulation existing in the first downlink electrical signal, and obtain the second downlink electrical signal.
  • the modulation and elimination unit is used to perform modulation and cancellation on the first downlink electrical signal to cancel the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal, so that the uplink and downlink communication of the optical wireless device can work simultaneously.
  • the modulation elimination unit includes:
  • the delay calculation unit is configured to calculate a target delay, where the target delay is the delay between inputting the uplink electrical signal and generating the first downlink electrical signal;
  • the signal reconstruction unit is configured to reconstruct the first downlink electrical signal according to the target time delay.
  • the modulation elimination unit includes a delay calculation unit and a signal reconstruction unit.
  • the time delay calculation unit is used to calculate the time delay between inputting the uplink electrical signal and generating the first downlink electrical signal, which is recorded as the target time delay.
  • the signal reconstruction unit is used to reconstruct the first downlink electrical signal according to the target time delay, offset the time delay existing in the first downlink electrical signal, and then modulate and eliminate the first downlink electrical signal.
  • the time delay existing in the first downlink electrical signal can be offset by using the time delay calculation unit and the signal reconstruction unit, so that the uplink and downlink communication of the optical wireless device can work simultaneously.
  • the delay calculation unit includes:
  • the time-to-digital converter is used to calculate the target time delay.
  • the delay calculation unit includes a time-to-digital converter.
  • the time-to-digital converter can be used to calculate the target time delay between the input of the uplink electrical signal and the generation of the first downlink electrical signal, and output high-precision parameters of the target time delay.
  • the signal reconstruction unit includes:
  • the delayer is configured to reconstruct the first downlink electrical signal according to the target time delay.
  • the signal reconstruction unit includes a delayer.
  • the delayer can be used to reconstruct the first downlink electrical signal according to the target time delay, offset the time delay existing in the first downlink electrical signal, and realize efficient downlink communication.
  • the signal reconstruction unit further includes:
  • the adjustable attenuator is used to adjust the signal amplitude of the first downlink electrical signal.
  • the signal reconstruction unit includes an adjustable attenuator in addition to the delayer.
  • the adjustable attenuator can be used to adjust the signal amplitude of the first downlink electrical signal to realize efficient downlink communication.
  • the modulation elimination unit further includes:
  • the divider is configured to modulate and eliminate the first downlink electrical signal according to the received uplink electrical signal to obtain the second downlink electrical signal.
  • the modulation elimination unit includes a delay calculation unit and a signal reconstruction unit, and the modulation elimination unit further includes a divider.
  • the divider is used to perform modulation and elimination on the first downlink electrical signal according to the known uplink electrical signal, that is, cancel the secondary modulation existing in the first downlink electrical signal, and obtain the second downlink electrical signal.
  • the first downlink electrical signal is modulated and eliminated by the divider, and the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal is canceled out, so that the uplink and downlink communication of the optical wireless device can work simultaneously.
  • the optical wireless device further includes:
  • the second processing unit is configured to perform at least one of the following:
  • uplink electrical signal is used for signal modulation of the first downlink optical signal, or for modulation and cancellation of the first downlink electrical signal
  • receiving a second downlink electrical signal where the second downlink electrical signal is an electrical signal after modulation and cancellation of the first downlink electrical signal.
  • the optical wireless device includes a second processing unit in addition to the first processing unit and the first transceiver unit.
  • the second processing unit can be used as a transmitting signal processing unit for sending an uplink electrical signal, and the uplink electrical signal is transmitted to the optical modulator in the first processing unit for signal modulation of the first downlink optical signal.
  • the electrical signal can also be transmitted to a modulation elimination unit for performing modulation elimination on the first downlink electrical signal.
  • the second processing unit may also serve as a received signal processing unit, configured to receive a second downlink electrical signal, where the second downlink electrical signal is an electrical signal after modulation and cancellation of the first downlink electrical signal.
  • an embodiment of the present application provides an optical wireless device, and the optical wireless device includes:
  • the third processing unit is configured to transmit a first downlink optical signal to the first optical wireless device; wherein the first downlink optical signal is divided into an uplink optical signal and a second downlink optical signal after optical signal processing, and the The uplink optical signal is used to reflect back to the second transceiver unit;
  • the second transceiver unit is configured to acquire the uplink optical signal and send a first uplink electrical signal.
  • the optical wireless device includes a third processing unit and a second transceiver unit.
  • the third processing unit in the optical wireless device is used to transmit the first downlink optical signal to the first optical wireless device.
  • the optical wireless device in this embodiment can also be called the second optical wireless device, which is used to distinguish the first Optical wireless devices.
  • the first downlink optical signal is divided into an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal is used for reflection back to the second transceiver unit in the second optical wireless device, and the second downlink optical signal is used for Received by the first optical wireless device itself.
  • the second transceiver unit in the second optical wireless device is configured to receive the reflected uplink optical signal, perform photoelectric change processing on the uplink optical signal, and send the first uplink electrical signal.
  • a set of optical structure including but not limited to the third processing unit and the second transceiver unit can be used to realize the uplink and downlink communication functions of the optical wireless device at the same time, and can reduce the complexity of the optical wireless device and improve the optical efficiency. Integration of wireless devices.
  • the second transceiver unit includes:
  • the fluorescence collector is used to receive the upstream light signal and generate a fluorescence signal
  • the photodetector is used to photoelectrically change the fluorescent signal to obtain the first uplink electrical signal.
  • the second transceiver unit includes a fluorescence collector and a photodetector.
  • the fluorescence collector is used to collect the upstream light signal, excite the fluorescence effect to generate the fluorescence signal, and transmit the fluorescence signal to the photodetector.
  • the fluorescent antenna is not sensitive to the incident direction of the optical signal, and can realize large-area light collection. It can be better adapted to a large-area semi-transmissive mirror to achieve high-efficiency reception of uplink optical signals in various incident directions.
  • the photodetector is used to photoelectrically change the received fluorescent signal to obtain the first uplink electrical signal.
  • the second transceiver unit composed of the fluorescence collector and the photodetector can be used to realize high-efficiency reception of uplink optical signals in various incident directions and convert them into first uplink electrical signals, thereby realizing uplink optical signals.
  • Communication function and can reduce the complexity of optical wireless equipment, improve the integration of optical wireless equipment.
  • the optical wireless device further includes:
  • the modulation and elimination unit is configured to perform modulation and elimination on the first uplink electrical signal according to the received downlink electrical signal to obtain a second uplink electrical signal.
  • the optical wireless device includes a modulation canceling unit in addition to the third processing unit and the second transceiver unit.
  • the first downlink optical signal Before the first downlink optical signal is transmitted, the first downlink optical signal will be subjected to modulation processing such as light intensity modulation or phase modulation according to the received downlink electrical signal, so that the modulation caused by the downlink electrical signal will be superimposed on the first downlink optical signal.
  • the downlink optical signal forms an uplink optical signal with both downlink data and uplink data. This effect is called secondary modulation.
  • the first uplink electrical signal obtained through photoelectric conversion of the uplink optical signal also has secondary modulation.
  • the modulation cancellation unit in the optical wireless device is used to perform modulation cancellation on the first uplink electrical signal according to the known downlink electrical signal, that is, cancel the secondary modulation existing in the first uplink electrical signal, and obtain the second uplink electrical signal.
  • the modulation and elimination unit is used to perform modulation and elimination on the first uplink electrical signal to cancel the secondary modulation caused by the downlink electrical signal in the first uplink electrical signal, so that the uplink and downlink communication of the optical wireless device can work simultaneously.
  • the modulation elimination unit includes:
  • the time delay calculation unit is configured to calculate a target time delay, where the target time delay is the time delay between inputting the downlink electrical signal and generating the first uplink electrical signal;
  • the signal reconstruction unit is configured to reconstruct the first uplink electrical signal according to the target time delay.
  • the modulation elimination unit includes a delay calculation unit and a signal reconstruction unit.
  • the time delay calculation unit is used to calculate the time delay between the input of the downlink electrical signal and the generation of the first uplink electrical signal, which is recorded as the target time delay.
  • the signal reconstruction unit is used to reconstruct the first uplink electrical signal according to the target time delay, offset the time delay existing in the first uplink electrical signal, and then modulate and eliminate the first uplink electrical signal.
  • the time delay existing in the first uplink electrical signal can be offset by using the time delay calculation unit and the signal reconstruction unit, so that the uplink and downlink communication of the optical wireless device can work simultaneously.
  • the delay calculation unit includes:
  • the time-to-digital converter is used to calculate the target time delay.
  • the delay calculation unit includes a time-to-digital converter.
  • the time-to-digital converter can be used to calculate the target time delay between the input of the downlink electrical signal and the generation of the first uplink electrical signal, and output high-precision parameters of the target time delay.
  • the signal reconstruction unit includes:
  • the delayer is configured to reconstruct the first uplink electrical signal according to the target time delay.
  • the signal reconstruction unit includes a delayer.
  • the delayer can be used to reconstruct the first uplink electrical signal according to the target time delay, offset the time delay existing in the first uplink electrical signal, and realize efficient uplink communication.
  • the signal reconstruction unit further includes:
  • the adjustable attenuator is used to adjust the signal amplitude of the first uplink electrical signal.
  • the signal reconstruction unit includes an adjustable attenuator in addition to the delayer.
  • the adjustable attenuator can be used to adjust the signal amplitude of the first uplink electrical signal to realize efficient uplink communication.
  • the modulation elimination unit further includes:
  • the divider is configured to modulate and eliminate the first uplink electrical signal according to the received downlink electrical signal to obtain the second uplink electrical signal.
  • the modulation elimination unit includes a delay calculation unit and a signal reconstruction unit, and the modulation elimination unit further includes a divider.
  • the divider is used to perform modulation and elimination on the first uplink electrical signal according to the known downlink electrical signal, that is, cancel the secondary modulation existing in the first uplink electrical signal, and obtain the second uplink electrical signal.
  • the first uplink electrical signal is modulated and eliminated by using the divider, and the secondary modulation caused by the downlink electrical signal in the first uplink electrical signal is canceled out, so that the uplink and downlink communication of the optical wireless device can work simultaneously.
  • the optical wireless device further includes:
  • the fourth processing unit is configured to perform at least one of the following:
  • receiving a second uplink electrical signal where the second uplink electrical signal is an electrical signal after modulation and cancellation of the first uplink electrical signal.
  • the optical wireless device includes a fourth processing unit in addition to the third processing unit and the second transceiver unit .
  • the fourth processing unit can be used as a transmission signal processing unit for sending a downlink electrical signal, and the downlink electrical signal is transmitted to a third processing unit for signal modulation of the first downlink optical signal, and the downlink electrical signal can also be transmitted to a modulation and elimination unit, configured to perform modulation and elimination on the first uplink electrical signal.
  • the fourth processing unit may also serve as a received signal processing unit, configured to receive a second uplink electrical signal, where the second uplink electrical signal is an electrical signal after modulation and cancellation of the first uplink electrical signal.
  • the embodiment of the present application provides a communication method, the communication method includes:
  • the first optical wireless device performs optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal; wherein the uplink optical signal and the second downlink optical signal are the first downlink optical signal
  • the optical signal is divided into two optical signals, and the uplink optical signal is used for reflection back to the second optical wireless device;
  • the first optical wireless device obtains a first downlink electrical signal according to the acquired second downlink optical signal.
  • a possible implementation manner of a communication method is provided, which is applied to a first optical wireless device.
  • the first optical wireless device performs optical signal processing on the first downlink optical signal to obtain the uplink optical signal and the second downlink optical signal.
  • the first downlink optical signal is divided into at least two optical signals of an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal is used for reflection back to the second optical wireless device, and the first
  • the second optical wireless device may specifically be a device that sends the above-mentioned first downlink optical signal, and the second downlink optical signal is received by the first optical wireless device in this embodiment itself.
  • the first optical wireless device performs photoelectric change processing on the second downlink optical signal to obtain the first downlink electrical signal.
  • the uplink and downlink communication functions of the first optical wireless device can be realized simultaneously, the complexity of the first optical wireless device can be reduced, and the integration degree of the first optical wireless device can be improved.
  • the method also includes:
  • a possible specific implementation manner of modulating an optical signal is also provided. Specifically, modulation processing such as optical intensity modulation or phase modulation is performed on the first downlink optical signal according to the uplink electrical signal. Secondly, after optical signal processing, the modulated first downlink optical signal is divided into a reflected optical signal and a second downlink optical signal, and then the reflected optical signal is subjected to modulation processing such as light intensity modulation or phase modulation according to the uplink electrical signal, An uplink optical signal is obtained, and the uplink optical signal is reflected back to the second optical wireless device.
  • modulation processing such as optical intensity modulation or phase modulation is performed on the first downlink optical signal according to the uplink electrical signal.
  • modulation processing such as intensity modulation or phase modulation can be performed on the optical signal, so that the modulated second downlink optical signal can effectively carry the downlink data, and the modulated uplink optical signal can effectively carry the uplink data, thereby simultaneously
  • modulation processing such as intensity modulation or phase modulation
  • the modulated second downlink optical signal can effectively carry the downlink data
  • the modulated uplink optical signal can effectively carry the uplink data, thereby simultaneously
  • the uplink and downlink communication functions of the first optical wireless device are realized, the complexity of the first optical wireless device can be reduced, and the integration degree of the first optical wireless device can be improved.
  • the obtaining the first downlink electrical signal according to the obtained second downlink optical signal includes:
  • a possible specific implementation manner of obtaining the first downlink electrical signal according to the obtained second downlink optical signal is provided. Specifically, a fluorescent signal is generated according to the received second downlink optical signal, and then a photoelectric change is performed on the fluorescent signal to obtain a first downlink electrical signal.
  • the fluorescence effect can be used to realize the efficient reception of the second downlink optical signal in various incident directions and convert it into the first downlink electrical signal, so as to realize the downlink communication function and reduce the first optical wireless signal.
  • the complexity of the equipment improves the integration of the first optical wireless equipment.
  • the photoelectric change of the fluorescent signal to obtain the first downlink electrical signal includes:
  • a possible specific implementation manner of photoelectrically changing the fluorescent signal is provided. Specifically, in the case of generating a plurality of fluorescent signals based on the received second downlink optical signal, photoelectrically change the plurality of fluorescent signals to obtain a plurality of electrical signals, and then combine the plurality of electrical signals to obtain the first downlink optical signal. electric signal.
  • multiple electrical signals can be combined into one electrical signal to realize high-efficiency reception and photoelectric conversion of the second downlink optical signal, and improve the downlink communication efficiency of the first optical wireless device.
  • the method also includes:
  • the first downlink electrical signal is modulated and eliminated according to the uplink electrical signal to obtain a second downlink electrical signal.
  • a possible specific implementation manner of performing modulation and cancellation on the first downlink electrical signal is also provided.
  • the first downlink optical signal undergoes optical signal processing to obtain the second downlink optical signal
  • the first downlink optical signal will be subjected to modulation processing such as optical intensity modulation or phase modulation according to the uplink electrical signal, resulting in
  • modulation processing such as optical intensity modulation or phase modulation according to the uplink electrical signal
  • the modulation caused by the uplink electrical signal will be superimposed on the first downlink optical signal to form a second downlink optical signal with both downlink data and uplink data.
  • secondary modulation the first downlink electrical signal obtained through the photoelectric conversion of the second downlink optical signal also has secondary modulation.
  • the first downlink electrical signal is modulated and eliminated according to the known uplink electrical signal, that is, the secondary modulation existing in the first downlink electrical signal is canceled to obtain the second downlink electrical signal.
  • the first downlink electrical signal is modulated and eliminated, and the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal is canceled out, so that the first optical wireless device can work simultaneously in uplink and downlink communication.
  • the performing modulation and cancellation on the first downlink electrical signal according to the uplink electrical signal includes:
  • the target time delay is a time delay between inputting the uplink electrical signal and generating the first downlink electrical signal
  • the time delay between the input of the uplink electrical signal and the generation of the first downlink electrical signal is calculated and recorded as the target time delay. Then, the first downlink electrical signal is reconstructed according to the target time delay to offset the time delay existing in the first downlink electrical signal, and then the first downlink electrical signal is modulated and eliminated.
  • the time delay existing in the first downlink electrical signal can be offset, so that the uplink and downlink communication of the first optical wireless device can work simultaneously.
  • the method before performing optical signal processing on the first downlink optical signal, the method further includes:
  • the two-optical wireless device determines parameters for performing modulation and cancellation on the uplink optical signal.
  • the first optical wireless device before performing optical signal processing on the first downlink optical signal, the first optical wireless device also receives a positioning signal sent by the second optical wireless device, and the positioning signal is used to determine the relationship between the second optical wireless device and the first optical wireless device. Distance information between devices, where the distance information is used by the second optical wireless device to determine parameters for performing modulation and cancellation on the uplink optical signal.
  • the positioning signal can be used to determine the distance information between the first optical wireless device and the second optical wireless device, so as to determine the parameters for the second optical wireless device to modulate and eliminate the uplink optical signal, and realize simultaneous uplink and downlink communication. Work.
  • the method also includes:
  • a response message is sent to the second optical wireless device in response to the communication request.
  • a possible specific implementation manner of determining parameters for performing modulation and cancellation on the first downlink electrical signal is also provided. Specifically, after receiving the communication request sent by the second optical wireless device, the first optical wireless device sends a response message to the second optical wireless device in response to the communication request, and at the same time determines that the first optical wireless device has a response to the first downlink electrical signal Perform modulation and elimination parameters, turn on the transceiver function, and prepare for data transmission with the second optical wireless device.
  • the method also includes:
  • a calibration request is sent to the second optical wireless device; wherein the calibration request is used to request the second optical wireless device to update parameters for performing modulation and cancellation on the uplink optical signal, so
  • the calibration conditions include one or more of the following: the distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or the uplink optical signal decreases , The bit error rate increases.
  • the first optical wireless device sends a calibration request to the second optical wireless device, which is used to request the second optical wireless device to update parameters for performing modulation cancellation on the uplink optical signal.
  • the calibration conditions include but are not limited to: the transmission distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or uplink optical signal decreases, and the bit error rate increases.
  • the second optical wireless device can be requested to update the parameters for modulating and eliminating the uplink optical signal in time, so as to realize the simultaneous operation of uplink and downlink communication and improve the efficiency of uplink and downlink communication.
  • the embodiment of the present application provides a communication method, the communication method includes:
  • the second optical wireless device transmits a first downlink optical signal to the first optical wireless device; wherein, the first downlink optical signal is divided into an uplink optical signal and a second downlink optical signal after optical signal processing, and the uplink optical signal for reflection back to said second optical wireless device;
  • the second optical wireless device obtains the first uplink electrical signal according to the acquired uplink optical signal.
  • a possible implementation manner of a communication method is provided, which is applied to the second optical wireless device.
  • the second optical wireless device sends a first downlink optical signal to the first optical wireless device, and the first downlink optical signal is processed to obtain an uplink optical signal and a second downlink optical signal.
  • the first downlink optical signal is divided into at least two optical signals of an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal is used for reflection back to the second optical wireless device, and the second The downlink optical signal is received by the first optical wireless device.
  • the second optical wireless device receives the reflected uplink optical signal, and performs photoelectric change processing on the uplink optical signal to obtain the first uplink electrical signal.
  • the uplink and downlink communication functions of the second optical wireless device can be realized simultaneously, the complexity of the second optical wireless device can be reduced, and the integration degree of the second optical wireless device can be improved.
  • the obtaining the first uplink electrical signal according to the acquired uplink optical signal includes:
  • a possible specific implementation manner of obtaining the first uplink electrical signal according to the acquired uplink optical signal is provided. Specifically, a fluorescence signal is generated according to the received uplink optical signal, and then a photoelectric change is performed on the fluorescence signal to obtain a first uplink electrical signal.
  • the fluorescent effect can be used to realize high-efficiency reception of uplink optical signals in various incident directions, and convert them into first uplink electrical signals, thereby realizing the uplink communication function and reducing the complexity of the second optical wireless device The degree of integration of the second optical wireless device is improved.
  • the method also includes:
  • the first uplink electrical signal is modulated and eliminated according to the downlink electrical signal to obtain a second uplink electrical signal.
  • a possible specific implementation manner of performing modulation and cancellation on the first uplink electrical signal is also provided.
  • modulation processing such as optical intensity modulation or phase modulation will be performed on the first downlink optical signal according to the received downlink electrical signal, so that the modulation caused by the downlink electrical signal will be superimposed to the first downlink optical signal to form an uplink optical signal with both downlink data and uplink data.
  • This effect is called secondary modulation.
  • the first uplink electrical signal obtained through photoelectric conversion of the uplink optical signal also has secondary modulation.
  • the first uplink electrical signal is modulated and eliminated according to the known downlink electrical signal, that is, the secondary modulation existing in the first uplink electrical signal is canceled to obtain the second downlink electrical signal.
  • the first uplink electrical signal is modulated and eliminated, and the secondary modulation caused by the downlink electrical signal in the first uplink electrical signal is canceled out, so that the second optical wireless device can work simultaneously for uplink and downlink communication.
  • the performing modulation and cancellation on the first uplink electrical signal according to the downlink electrical signal includes:
  • the target time delay is the time delay between inputting the downlink electrical signal and generating the first uplink electrical signal
  • the time delay between the input of the downlink electrical signal and the generation of the first uplink electrical signal is calculated, and recorded as the target time delay. Then, the first uplink electrical signal is reconstructed according to the target time delay to offset the time delay existing in the first uplink electrical signal, and then the first uplink electrical signal is modulated and eliminated.
  • the time delay existing in the first uplink electrical signal can be offset, so that the uplink and downlink communication of the second optical wireless device can work simultaneously.
  • the method before transmitting the first downlink optical signal to the first optical wireless device, the method further includes:
  • parameters for performing modulation and elimination on the uplink optical signal are determined.
  • the second optical wireless device before transmitting the first downlink optical signal to the first optical wireless device, the second optical wireless device also sends a positioning signal to the first optical wireless device, and the positioning signal is used to determine the relationship between the first optical wireless device and the second optical wireless device. Distance information between wireless devices. The second optical wireless device determines parameters for performing modulation and cancellation on the uplink optical signal according to the distance information.
  • the positioning signal can be used to determine the distance information between the first optical wireless device and the second optical wireless device, so as to determine the parameters for the second optical wireless device to modulate and eliminate the uplink optical signal, and realize simultaneous uplink and downlink communication. Work.
  • the method also includes:
  • a response message corresponding to the communication request is received.
  • a possible specific implementation manner of performing a communication request to the first optical wireless device is also provided. Specifically, after the second optical wireless device determines parameters for performing modulation cancellation on the uplink optical signal, the second optical wireless device sends a communication request to the first optical wireless device for requesting data transmission with the first optical wireless device. After receiving the response message corresponding to the communication request, the second optical wireless device turns on the sending and receiving function, and prepares to perform data transmission with the first optical wireless device. In addition, while sending the response message, the first optical wireless device also determines parameters for performing modulation and cancellation on the first downlink electrical signal, and turns on the sending and receiving function. Through the embodiment of the present application, the second optical wireless device can perform data transmission with the first optical wireless device, so that uplink and downlink communication can work simultaneously.
  • the method also includes:
  • the calibration condition includes the following one One or more items: the distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or the uplink optical signal decreases, and the bit error rate increases .
  • a possible specific implementation manner of a calibration mechanism is also provided. Specifically, when the second optical wireless device detects that the calibration condition is satisfied, or when receiving the calibration request sent by the first optical wireless device, the second optical wireless device will stop communicating with the first optical wireless device. The data transmission between them updates the parameters for modulation and elimination of the uplink optical signal.
  • the calibration conditions include but are not limited to: the transmission distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or uplink optical signal decreases, and the bit error rate increases.
  • the parameters for modulating and eliminating the uplink optical signal can be updated in time, so as to realize the simultaneous operation of uplink and downlink communication and improve the efficiency of uplink and downlink communication.
  • the embodiment of the present application provides a communication device, the communication device includes a processor; the processor is configured to execute the computer-executed instructions stored in the memory, so that the communication device performs the above-mentioned third aspect And the method of any possible implementation, or the fourth aspect and the method of any possible implementation.
  • the communication device further includes a transceiver, configured to receive signals or send signals.
  • an embodiment of the present application provides a communication device, the communication device includes a logic circuit and a communication interface; the communication interface is used to input information or output information, and the logic circuit is used to input information through the communication interface Or output information, so that the communication device executes the method of the third aspect and any possible implementation manner, or the method of the fourth aspect and any possible implementation manner.
  • the embodiment of the present application provides a computer-readable storage medium, which is used to store instructions or computer programs; when the instructions or the computer programs are executed, the third aspect and The method described in any possible implementation manner is implemented, or the fourth aspect and the method described in any possible implementation manner are implemented.
  • the embodiment of the present application provides a computer program product, the computer program product includes instructions or computer programs; when the instructions or the computer programs are executed, the third aspect and any possible implementation The method described in the manner is realized, or the method described in the fourth aspect and any possible implementation manner is realized.
  • the embodiment of the present application provides a chip, the chip includes a processor, the processor is used to execute instructions, and when the processor executes the instructions, the chip performs the third aspect and any possible The method described in the embodiment, or the method described in the fourth aspect and any possible embodiment.
  • the chip further includes a communication interface, and the communication interface is used for receiving signals or sending signals.
  • the embodiment of the present application provides a communication system, the system includes at least one optical wireless device as described in the first aspect, or the optical wireless device as described in the second aspect, or the communication system as described in the fifth aspect device, or the communication device described in the sixth aspect, or the chip described in the ninth aspect.
  • the above method related to sending information and/or The process of receiving information and the like can be understood as the process of outputting information by the processor, and/or the process of receiving input information by the processor.
  • the processor may output information to a transceiver (or a communication interface, or a sending module) for transmission by the transceiver. After the information is output by the processor, additional processing may be required before reaching the transceiver.
  • the transceiver or communication interface, or sending module
  • the information may require other processing before being input to the processor.
  • the sending information mentioned in the foregoing method can be understood as the processor outputting information.
  • receiving information may be understood as the processor receiving input information.
  • the processor may be dedicated to The processor is adapted to perform these methods, and may also be a processor that performs these methods by executing computer instructions in a memory, such as a general purpose processor.
  • the above-mentioned memory can be a non-transitory (non-transitory) memory, such as a read-only memory (Read Only Memory, ROM), which can be integrated with the processor on the same chip, or can be respectively arranged on different chips.
  • ROM read-only memory
  • the embodiment does not limit the type of the memory and the arrangement of the memory and the processor.
  • the above at least one memory is located outside the device.
  • the at least one memory is located within the device.
  • part of the memory of the at least one memory is located inside the device, and another part of the memory is located outside the device.
  • processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together.
  • a set of optical structures can be used to perform optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal and the second downlink optical signal are the first downlink optical signal
  • the uplink optical signal is divided into two optical signals, the uplink optical signal is used to reflect back to the second optical wireless device, and the second downlink optical signal is used to receive and perform photoelectric change processing to obtain the first downlink electrical signal, thereby realizing uplink and downlink communication Function, and can reduce the complexity of optical wireless equipment, improve the integration of optical wireless equipment.
  • FIG. 1 is a schematic structural diagram of an optical wireless communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of an optical wireless communication system provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of an optical wireless communication system provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an application scenario of optical wireless communication provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of an application scenario of optical wireless communication provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of an optical wireless device provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • FIG. 14 is a schematic flowchart of a communication method provided in an embodiment of the present application.
  • FIG. 15 is a schematic flowchart of another communication method provided by the embodiment of the present application.
  • FIG. 16 is a schematic flowchart of another communication method provided by the embodiment of the present application.
  • FIG. 17 is a schematic flowchart of another communication method provided in the embodiment of the present application.
  • FIG. 18 is a schematic flowchart of another communication method provided by the embodiment of the present application.
  • FIG. 19 is a schematic flowchart of another communication method provided by the embodiment of the present application.
  • FIG. 20 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 21 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 22 is a schematic structural diagram of a chip provided by an embodiment of the present application.
  • Embodiments of the present application provide an optical wireless device, a communication method, and a communication system, which relate to the field of optical communication technology.
  • a set of optical structures can be used to realize uplink and downlink communication functions, and can reduce the complexity of optical wireless equipment and improve optical wireless communication.
  • the degree of integration of the device is not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to the optical wireless equipment and the communication.
  • Cat's eye lens It is a combined lens. It consists of a concave lens and a convex lens.
  • the objective lens is a concave lens, and the eyepiece is a convex lens, but the focal length of the objective lens is short, and the focal length of the eyepiece is long, and the focal length of the eyepiece should be equal to or greater than the distance between the objective lens and the eyepiece (the length of the cat's eye) and the sum of focal lengths.
  • Semitransparent mirror A mirror that reflects part of the incident light energy and transmits part of it.
  • Optical wireless communication It is one of the key fields in wireless communication technology. Different from wireless communication systems in the 5-6GHz, 60GHz, and THz frequency bands, optical wireless communication technology has the advantages of large available bandwidth, small transmitting antenna, and anti-electromagnetic interference.
  • the current high-speed optical wireless communication system solution is mainly used in single-user point-to-point, soft-input soft-output (Soft-Input Soft-Output, SISO) communication scenarios.
  • SISO Soft-Input Soft-Output
  • the light source and photodetector in the system adopt broadband devices. Among them, the active area of the broadband photodetector is small, and the diameter is on the order of um, which has high alignment requirements for the entire communication system. .
  • multiple terminal nodes are required to feed back real-time information. While ensuring the communication rate, the optical wireless communication terminal is required to be miniaturized and highly integrated.
  • Optical Wireless Communication (OWC) terminal without light source corner reflectors are usually used as the uplink optical system.
  • OWC Optical Wireless Communication
  • the optical signal sent by the OWC base station is reflected back to the OWC base station without using a beam adjustment unit, which can reduce the complexity of the OWC terminal.
  • the optical system based on the corner reflector does not have the function of downlink communication. Therefore, an additional receiving lens and a beam adjustment structure need to be configured for downlink optical signal reception during downlink communication.
  • the OWC terminal needs to adopt a new architecture.
  • a new optical structure is designed to realize the downlink signal reception, avoiding the OWC terminal system.
  • Optical systems such as complex beam adjustment or tracking and aiming are used in the system.
  • FIG. 1 is a schematic structural diagram of an optical wireless communication system provided in the embodiment of the present application.
  • the communication system 100 mainly includes two parts: an optical wireless network device and an optical wireless terminal device.
  • the optical wireless network equipment includes but is not limited to a light source, a micro-electro-mechanical system (Micro-Electro-Mechanical Systems, MEMS) oscillating mirror, a lens, and a photodetector.
  • Optical wireless end devices include, but are not limited to, lenses, photodetectors, spatial light modulators, and corner mirrors. Interfaces between network elements are shown in FIG. 1 . It should be understood that service interfaces may also be used for communication between network elements.
  • the optical wireless terminal device in the embodiment of the present application can communicate with one or more core networks (core network, CN) via an access network (access network, AN) device, including but not limited to a wired line connection, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection; and/or another data connection network; and/or via a wireless interface, e.g.
  • core network CN
  • access network access network
  • AN access network
  • a wired line connection such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection; and/or another data connection network
  • PSTN Public Switched Telephone Networks
  • DSL Digital Subscriber Line
  • digital cable direct cable connection
  • another data connection network e.g.
  • An optical wireless terminal device arranged to communicate via a wireless interface may be referred to as a "wireless communication terminal", “wireless terminal” or “mobile terminal”.
  • optical wireless terminal equipment examples include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data communication capabilities; may include radiotelephones, pagers , Internet/Intranet access, Web browser, organizer, calendar, and/or a personal digital assistant (PDA) with a Global Positioning System (GPS) receiver; and a regular laptop and/or Or palm receivers or other electronic devices including radiotelephone transceivers.
  • Optical wireless terminal equipment may also be called user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device , User Agent, or User Device.
  • the optical wireless terminal equipment can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (PDA), a Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in the Internet of Things or Internet of Vehicles, terminal devices in 5G networks, future evolution of public land mobile communications Terminal equipment in the network (public land mobile network, PLMN) and any form of terminal equipment in the future network.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the optical wireless network device in the embodiment of the present application is a device for connecting an optical wireless terminal device to a wireless network, and may specifically be a base station.
  • the base station may include various forms of base stations, for example: macro base stations, micro base stations (also called small stations), relay stations, access points, and the like.
  • access point in wireless local area network (wireless local area network, WLAN), global system for mobile communications (global system for mobile communications, GSM) or code division multiple access (code division multiple access) access, CDMA) in the base station (base transceiver station, BTS), can also be wideband code division multiple access (wideband code division multiple access, WCDMA) in the base station (NodeB, NB), can also be the evolved base station in LTE (Evolved Node B, eNB or eNodeB), or relay stations or access points, or vehicle-mounted devices, wearable devices, and the next generation Node B (the next generation Node B, gNB) in 5G systems or future evolution of public land mobile networks
  • the base stations in the (public land mobile network, PLMN) network, etc., are not specifically limited in this embodiment of the present application.
  • the embodiment of the present application is not limited to be only applied to the communication system architecture shown in FIG. 1 .
  • the communication system to which the communication method of the embodiment of the present application can be applied may include more or less network elements or devices.
  • the devices or network elements in FIG. 1 may be hardware, or functionally divided software, or a combination of the above two.
  • the devices or network elements in FIG. 1 may communicate through other devices or network elements.
  • the optical wireless network equipment uses a light source and a photodetector to realize downlink optical signal transmission and uplink optical signal reception.
  • the optical wireless terminal equipment uses the corner reflector and the spatial light modulator to realize the transmission and modulation of the uplink optical signal.
  • the surface of the corner reflector is a total reflection layer, and the spatial light modulator covers the entire corner reflector surface. Realized by lens and photodetector.
  • the above-mentioned uplink communication system based on corner reflectors and spatial light modulators does not have the function of demodulating and receiving downlink optical signals, and needs to configure additional optical lenses for downlink optical signal reception, which is not conducive to the miniaturization of optical wireless terminal equipment And high integration, especially in the application scenario of terminal movement and attitude change, the receiving lens needs to be equipped with a complete tracking and aiming system for real-time downlink optical signal reception.
  • the beam of the light source on the side of the optical wireless network device should not be too narrow, and it needs to cover the receiving lens of the optical wireless terminal device, making it difficult to balance the performance of uplink and downlink communication.
  • FIG. 2 is a schematic structural diagram of another communication system provided in the embodiment of the present application.
  • the communication system 200 mainly includes two parts: an optical wireless network device and an optical wireless terminal device.
  • the optical wireless network equipment includes but not limited to a light source, a MEMS vibrating mirror, a lens and a photodetector.
  • Optical wireless terminal equipment includes, but is not limited to, lenses, photodetectors, and corner mirrors. Interfaces between network elements are shown in FIG. 2 . It should be understood that service interfaces may also be used for communication between network elements.
  • optical wireless network device and the optical wireless terminal device in the communication system shown in the embodiment of the present application are similar to the communication system in FIG. 1 above, and will not be repeated here.
  • the embodiment of the present application is not limited to be only applied to the communication system architecture shown in FIG. 2 .
  • the communication system to which the communication method of the embodiment of the present application can be applied may include more or less network elements or devices.
  • the devices or network elements in FIG. 2 may be hardware, or functionally divided software, or a combination of the above two.
  • the devices or network elements in FIG. 2 may communicate through other devices or network elements.
  • optical wireless network equipment uses light sources and photodetectors to realize downlink optical signal transmission and uplink optical signal reception
  • optical wireless terminal equipment uses part of the space reserved in the corner reflector structure to place optical lenses for reception.
  • the downlink optical signal is received, and the corner reflector and the spatial light modulator realize the transmission and modulation of the uplink optical signal.
  • the surface of the corner reflector is a total reflection layer, and the spatial light modulator covers the entire surface of the corner reflector.
  • part of the space reserved in the above-mentioned corner reflector-based structure for placing the optical lens for receiving the downlink optical signal destroys the complete optical path of the corner reflector, resulting in the inability of part of the incident light beam to return to the original path.
  • the high-speed downlink communication requires the larger the optical receiving aperture, the better, which will result in too large area occupied by the corner reflector, resulting in low upstream feedback optical communication power. Therefore, in the case of limited volume, there is an essential contradiction between downlink and uplink optical apertures, and it is impossible to ensure the performance of downlink and uplink communication at the same time.
  • the present application provides an optical wireless equipment, a communication method and a communication system , relates to the field of optical communication technology, can use a set of optical structures to realize uplink and downlink communication functions, and at the same time can reduce the complexity of optical wireless equipment and improve the integration degree of optical wireless equipment.
  • the cellular network system may include but not limited to: the fifth generation (5th generation, 5G) system, the Global System of Mobile communication (GSM) system, the code division multiple access (Code Division Multiple Access, CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex, FDD) system, LTE time division duplex (Time Division Duplex, TDD) system, advanced long term evolution (Advanced long term evolution, LTE-A) system, new air interface (New Radio, NR) system, evolution system of NR system, non LTE (LTE-based access to unlicensed spectrum, LTE-U) system on the licensed frequency band, NR (NR-based access to unlicensed spectrum, NR-U) system on the unlicensed
  • 5G Fifth Generation
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE
  • the satellite communication system may include various non-terrestrial network systems, for example, a satellite or an unmanned aircraft system (unmanned aircraft system, UAS) platform, and other networks for wireless frequency transmission, which will not be listed here.
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • the satellite communication system may include various non-terrestrial network systems, for example, a satellite or an unmanned aircraft system (unmanned aircraft system, UAS) platform, and other networks for wireless frequency transmission, which will not be listed here.
  • FIG. 3 is a schematic structural diagram of a communication system provided in the embodiment of the present application.
  • the communication system 300 mainly includes two parts: an optical wireless network device and an optical wireless terminal device.
  • the optical wireless network equipment includes but not limited to a light source, an optical front end, a photodetector, a modulation cancellation unit, a transmitter signal processing unit, and a receiver signal processing unit.
  • Optical wireless terminal equipment includes, but is not limited to, an optical front end, a transceiver front end, a modulation cancellation unit, a transmitter signal processing unit, and a receiver signal processing unit.
  • the interfaces between network elements are shown in FIG. 3 . It should be understood that service interfaces may also be used for communication between network elements.
  • optical wireless network device and the optical wireless terminal device in the communication system shown in the embodiment of the present application are similar to the communication system in FIG. 1 above, and will not be repeated here.
  • the optical front-end of the optical wireless terminal device receives the downlink optical signal, wherein a part of the downlink optical signal is reflected back to the optical wireless network device and realizes uplink modulation, and the other part of the optical signal penetrates the optical front-end , output to the transceiver front-end of the optical wireless terminal equipment to realize partial downlink optical signal reception.
  • the transceiver front-end of the optical wireless terminal equipment is used to receive part of the downlink optical signal, complete the photoelectric conversion, and output the downlink electrical signal to the back-end modulation and elimination unit.
  • Modulation eliminates the received downlink electrical signal and the uplink electrical signal output by the transmitter signal processing unit, and based on the uplink electrical signal, offsets the secondary modulation of part of the downlink optical signal caused by the uplink electrical signal, and outputs the processed downlink electrical signal to the receiver Signal processing unit.
  • the optical front end of the optical wireless terminal device receives the downlink optical signal output by the optical wireless network device, and uses the optical front end to realize the reception of the downlink optical signal.
  • Its core components include but are not limited to cat-eye lenses, spatial light modulators, semi-transmissive mirrors, etc. If the optical front-end adopts a cat's-eye lens and a semi-transmissive mirror as the transmission optical structure, the downlink optical signal will pass through the cat's-eye lens, spatial light modulator, and semi-transmissive mirror in sequence to achieve partial reception of the downlink optical signal and partial reflection back to the optical wireless network device. At the same time, the spatial light modulator is used to realize the modulation of the uplink optical signal. If the optical front end uses a corner reflector as a reflective optical structure, the downlink optical signal first passes through the optical modulator, and then enters the reflected light path constructed by the corner reflector.
  • the transceiver front-end of optical wireless terminal equipment is used to receive the downlink optical signal output by the optical front-end, and use fluorescent materials to realize large-area downlink optical signal reception, and cooperate with photodetectors or photodetector arrays to realize photoelectric conversion.
  • the modulation cancellation unit of the optical wireless terminal equipment includes functions of delay calculation, signal reconstruction and modulation cancellation, which are used to reconstruct the electrical signal received by the optical wireless terminal equipment to realize secondary modulation cancellation. Its core components include but are not limited to time-to-digital converters, delayers, adjustable attenuators, dividers, etc. It should be noted that the modulation cancellation unit of the optical wireless terminal equipment can be used as an option when no modulation cancellation is required.
  • the main functions of the transmitter signal processing unit and the receiver signal processing unit of optical wireless terminal equipment are to realize digital-to-analog/analog-to-digital conversion between electrical signals and general channel coding/equalization.
  • Specific implementation methods include but are not limited to the use of Field Programmable Gate Array (Field-Programmable Gate Array, FPGA), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), logic circuits, etc.
  • the light source of the optical wireless network device emits a downlink optical signal
  • the downlink optical signal is modulated according to the downlink electrical signal sent by the signal processing unit of the transmitter, and the downlink optical signal is transmitted to the optical wireless terminal device after passing through the optical front end.
  • the optical front-end of the optical wireless network equipment will also receive the uplink optical signal sent by the optical wireless terminal equipment, and use photodetectors or photodetector arrays to realize photoelectric conversion, and output uplink electrical signals to the back-end modulation and elimination unit.
  • Modulation eliminates the received uplink electrical signal and the downlink electrical signal output by the transmitter signal processing unit, and based on the downlink electrical signal, cancels the secondary modulation of part of the uplink optical signal caused by the downlink electrical signal, and outputs the processed uplink electrical signal to the receiver Signal processing unit.
  • the embodiment of the present application is not limited to be only applied to the communication system architecture shown in FIG. 3 .
  • the communication system to which the communication method of the embodiment of the present application can be applied may include more or less network elements or devices.
  • the devices or network elements in FIG. 3 may be hardware, or functionally divided software, or a combination of the above two.
  • the devices or network elements in FIG. 3 may communicate through other devices or network elements.
  • the optical wireless device in this application has the characteristics of miniaturization, low complexity, and high integration, and is applied to optical wireless communication systems, especially for scenarios such as the Internet of Things and the Internet of Vehicles that require multiple densely distributed optical wireless devices. In practical applications, multi-node communication can be quickly arranged.
  • FIG. 4 is a schematic diagram of an application scenario of optical wireless communication provided by the embodiment of the present application.
  • the optical wireless network device provides The deployed optical wireless terminal equipment sends control commands (such as control command 1, control command 2, and control command 3 in Figure 4), and each optical wireless terminal equipment sends feedback commands to the optical wireless network equipment (such as the feedback command in Figure 4).
  • control commands such as control command 1, control command 2, and control command 3 in Figure 4
  • feedback instruction 3 realize the task of transmitting the obtained state information of each object and its changing mode from one point in time (or space) to another point, so as to realize the task of each object in the Internet of Things scene Intelligent identification, positioning, tracking, monitoring and management of objects.
  • FIG. 5 is a schematic diagram of an application scenario of optical wireless communication provided by the embodiment of the present application.
  • the application scenario includes a vehicle and multiple roadside units.
  • the communication between the roadside unit and the vehicle so that the roadside unit can provide various services for the vehicle.
  • the roadside unit can be installed on the roadside and interact with the vehicle through wireless communication.
  • the communication with the vehicle can use dedicated short range communication (DSRC) technology, or V2X (C-V2X) based on cellular network. ) communication, for example, based on a long term evolution (long term evolution, LTE) communication protocol or based on a fifth generation (5th generation, 5G) communication protocol.
  • DSRC dedicated short range communication
  • V2X C-V2X
  • Roadside units can provide services for vehicles, such as vehicle identification, electronic toll collection, and electronic point deduction.
  • Roadside units can be equipped with sensing devices to collect road information and provide vehicle-road coordination services.
  • the roadside unit can be connected to roadside traffic signs (for example, electronic traffic lights, or electronic speed limit signs, etc.) to realize real-time control of traffic lights or speed limit signs, or can provide road information to vehicles through the cloud or directly to Improve automatic driving or assisted driving functions.
  • the vehicle sends vehicle condition information and route end points to the roadside unit through the onboard optical wireless network equipment, and the roadside unit feeds back real-time path planning to the vehicle through the onboard optical wireless terminal equipment.
  • FIG. 6 is a schematic structural diagram of an optical wireless device provided by an embodiment of the present application.
  • the optical wireless device includes a first processing unit 10 and a first transceiver unit 20 .
  • the functions of the first processing unit 10 and the first transceiver unit 20 are as follows:
  • the first processing unit 10 is configured to perform optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal; wherein, the uplink optical signal and the second downlink optical signal are divided into the first downlink optical signal Two paths of optical signals, the uplink optical signal is used to reflect back to the second optical wireless device.
  • the first transceiver unit 20 is configured to acquire the second downlink optical signal and send the first downlink electrical signal.
  • the first downlink optical signal is divided into at least two optical signals of an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal is used for reflection back to the second optical wireless device
  • the The second optical wireless device may specifically be a device that sends the above-mentioned first downlink optical signal, and the second downlink optical signal is used for the optical wireless device in this embodiment (the optical wireless device in this embodiment may also be referred to as the first optical The wireless device is used to distinguish the second optical wireless device) from receiving by itself.
  • the first transceiver unit 20 in the first optical wireless device is configured to receive the above-mentioned second downlink optical signal, and perform photoelectric change processing on the second downlink optical signal to obtain the first downlink electrical signal.
  • a set of optical structures including but not limited to the first processing unit and the first transceiver unit can be used to simultaneously realize the uplink and downlink communication functions of the first optical wireless device, and reduce the complexity of the optical wireless device. Improve the integration of optical wireless equipment.
  • the above-mentioned first processing unit 10 includes:
  • the first downlink optical signal is divided into a reflected optical signal and a second downlink optical signal after passing through at least one semi-transparent mirror.
  • the transmission and reflection principle of the semi-transmissive mirror is used, so that the first downlink optical signal is divided into a reflected optical signal and a second downlink optical signal after passing through the at least one semi-transparent mirror.
  • the second downlink optical signal is used for the first optical wireless device in this embodiment to receive by itself, and the reflected optical signal is used for reflection back to the second optical wireless device.
  • the reflected optical signal needs to be modulated to obtain the above-mentioned uplink optical signal signal, and then reflect the uplink optical signal back to the second optical wireless device, and the second optical wireless device may specifically be a device that sends the above-mentioned first downlink optical signal.
  • the received first downlink optical signal can be divided into a reflected optical signal and a second downlink optical signal by using the principle of transmission and reflection of a semi-transparent mirror, and the second downlink optical signal is used to realize the downlink communication function.
  • the reflected optical signal is used to realize the uplink communication function, so that the uplink and downlink communication functions of the first optical wireless device can be realized simultaneously, the complexity of the first optical wireless device can be reduced, and the integration degree of the first optical wireless device can be improved.
  • the above-mentioned first processing unit 10 further includes:
  • the incident angle of the first downlink optical signal passing through the at least one lens is the same as the outgoing angle of the uplink optical signal passing through the at least one lens.
  • the first processing unit 10 may also include at least one lens.
  • the incident angle of the above-mentioned first downlink optical signal passing through the at least one lens is the same as the exit angle of the above-mentioned uplink optical signal passing through the at least one lens, so that the incident light (first downlink optical signal) and the outgoing light
  • the emitted light (uplink optical signal) forms a complete optical communication circuit, which can realize the uplink and downlink communication functions of the first optical wireless device at the same time, and can reduce the complexity of the first optical wireless device and improve the integration degree of the first optical wireless device.
  • the above-mentioned first processing unit 10 further includes:
  • the incident angle of the first downlink optical signal passing through the at least one total reflection mirror is the same as the exit angle of the uplink optical signal passing through the at least one total reflection mirror.
  • the first processing unit 10 may also include at least one total reflection lens.
  • the incident angle of the above-mentioned first downlink optical signal passing through the at least one total reflection lens is the same as the exit angle of the above-mentioned uplink optical signal passing through the at least one total reflection lens, so that the incident light (the first downlink optical signal) Uplink optical signal) and outgoing light (uplink optical signal) form a complete optical communication circuit, which can realize the uplink and downlink communication functions of the first optical wireless device at the same time, and can reduce the complexity of the first optical wireless device and improve the first optical wireless device. Integration of wireless devices.
  • the above-mentioned first processing unit 10 further includes:
  • the optical modulator is used for intensity modulation or phase modulation of the optical signal.
  • the first processing unit 10 may also include a light modulator.
  • the optical modulator is used to perform intensity modulation or phase modulation on the optical signal. Specifically, when the incident light (first downlink optical signal) passes through the optical modulator, the optical modulator performs the first downlink optical signal according to the received uplink electrical signal. The optical signal is subjected to modulation processing such as light intensity modulation or phase modulation.
  • the modulated first downlink optical signal passes through at least one semi-transmissive mirror, is divided into a reflected optical signal and a second downlink optical signal, and passes through the optical modulator again in the process of reflecting the reflected optical signal back to the second optical wireless device,
  • the optical modulator performs modulation processing such as light intensity modulation or phase modulation on the reflected optical signal according to the received uplink electrical signal to obtain an uplink optical signal, and the uplink optical signal is reflected back to the second optical wireless device.
  • the optical modulator can be used to perform modulation processing such as light intensity modulation or phase modulation on the incident light and the outgoing light, so that the modulated second downlink optical signal effectively carries downlink data, and the modulated uplink optical signal
  • modulation processing such as light intensity modulation or phase modulation
  • the modulated second downlink optical signal effectively carries downlink data
  • the modulated uplink optical signal The uplink data is effectively carried, so that the uplink and downlink communication functions of the first optical wireless device can be realized simultaneously, the complexity of the first optical wireless device can be reduced, and the integration degree of the first optical wireless device can be improved.
  • the first transceiver unit 20 includes:
  • the fluorescence collector is configured to receive the above-mentioned second downlink optical signal and generate a fluorescence signal
  • the photodetector is used to photoelectrically change the fluorescent signal to obtain an electrical signal.
  • the fluorescence collector is used to collect the second downlink light signal, excite the fluorescence effect to generate the fluorescence signal, and transmit the fluorescence signal to the photodetector.
  • the fluorescent antenna is not sensitive to the incident direction of the optical signal and can realize large-area light collection. It can be better adapted to a large-area semi-transmissive mirror to achieve high-efficiency reception of the second downlink optical signal in various incident directions.
  • the photodetector is used to photoelectrically change the received fluorescent signal to obtain an electrical signal, which can be output as the above-mentioned first downlink electrical signal.
  • the first transceiver unit 20 can also use a photodetector array, a high dynamic range complementary metal oxide semiconductor (complementary metal oxide semiconductor, CMOS) photosensitive chip in addition to the receiving method of the fluorescence collector and the photodetector. and other devices realize the reception of the second downlink optical signal and the conversion of the photoelectric signal.
  • CMOS complementary metal oxide semiconductor
  • the first transceiver unit composed of the fluorescence collector and the photodetector can be used to realize high-efficiency reception of the second downlink optical signal in various incident directions and convert it into the first downlink electrical signal, Therefore, the downlink communication function is realized, the complexity of the first optical wireless device can be reduced, and the integration degree of the first optical wireless device can be improved.
  • the first transceiver unit 20 further includes:
  • the photodetector outputs a plurality of electrical signals after photoelectrically changing the plurality of fluorescent signals
  • a combiner configured to combine multiple electrical signals to output the above-mentioned first downlink electrical signal.
  • each fluorescence collector will receive the second downlink light signal transmitted by its corresponding semi-transparent mirror, and generate multiple fluorescence signals.
  • the photodetector outputs a plurality of electrical signals after photoelectrically changing the plurality of fluorescent signals.
  • the combiner is used to combine the multiple electrical signals to obtain and output the first downlink electrical signal.
  • a combiner can be used to combine multiple electrical signals into one electrical signal, so as to realize high-efficiency reception and photoelectric conversion of the second downlink optical signal, and improve the downlink communication efficiency of the first optical wireless device.
  • the foregoing first optical wireless device further includes:
  • the modulation and elimination unit is configured to perform modulation and elimination on the first downlink electrical signal according to the received uplink electrical signal to obtain the second downlink electrical signal.
  • the first optical wireless device also includes a modulation cancellation unit. Since the first downlink optical signal passes through the optical modulator during the process of obtaining the second downlink optical signal through optical signal processing, at this time the optical modulator measures the light intensity of the first downlink optical signal according to the received uplink electrical signal. Modulation processing such as modulation or phase modulation causes the modulation caused by the uplink electrical signal to be superimposed on the first downlink optical signal to form a second downlink optical signal with both downlink data and uplink data. This effect is called secondary modulation.
  • the first downlink electrical signal obtained through the photoelectric conversion of the second downlink optical signal also has secondary modulation.
  • the modulation elimination unit in the first optical wireless device is used to perform modulation elimination on the first downlink electrical signal according to the known uplink electrical signal, that is, cancel the secondary modulation existing in the first downlink electrical signal, and obtain the second downlink electrical signal Signal.
  • the modulation cancellation unit is used to perform modulation cancellation on the first downlink electrical signal to cancel the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal, so that the simultaneous uplink and downlink communication of the first optical wireless device can be realized. Work.
  • the above-mentioned modulation and elimination unit includes:
  • the time delay calculation unit is used to calculate the target time delay, and the target time delay is the time delay between inputting the above-mentioned uplink electrical signal and generating the above-mentioned first downlink electrical signal;
  • the signal reconstruction unit is configured to reconstruct the above-mentioned first downlink electrical signal according to the target time delay.
  • the time delay calculation unit is used to calculate the time delay between inputting the uplink electrical signal and generating the first downlink electrical signal, which is recorded as a target time delay.
  • the signal reconstruction unit is used to reconstruct the first downlink electrical signal according to the target time delay, offset the time delay existing in the first downlink electrical signal, and then modulate and eliminate the first downlink electrical signal.
  • the delay calculation unit and the signal reconstruction unit are used to cancel the delay existing in the first downlink electrical signal, so that the first optical wireless device can work simultaneously in uplink and downlink communication.
  • the delay calculation unit includes:
  • the time-to-digital converter is used to calculate the above-mentioned target time delay.
  • the delay calculation unit includes a time-to-digital converter, which can be used to calculate the target delay between the input of the uplink electrical signal and the generation of the first downlink electrical signal, and output a high-precision target delay parameters.
  • the above-mentioned signal reconstruction unit includes:
  • the delayer is configured to reconstruct the first downlink electrical signal according to the target time delay.
  • the signal reconstruction unit includes a delayer, which can be used to reconstruct the first downlink electrical signal according to the target time delay, offset the time delay existing in the first downlink electrical signal, and realize Efficient downlink communication.
  • the above-mentioned signal reconstruction unit further includes:
  • the adjustable attenuator is used to adjust the signal amplitude of the above-mentioned first downlink electrical signal.
  • the signal reconstruction unit also includes an adjustable attenuator, which can be used to adjust the signal amplitude of the first downlink electrical signal to achieve efficient downlink communication.
  • the above-mentioned modulation and elimination unit further includes:
  • the divider is configured to modulate and eliminate the first downlink electrical signal according to the received uplink electrical signal to obtain the second downlink electrical signal.
  • the modulation elimination unit also includes a divider, which is used to perform modulation elimination on the first downlink electrical signal according to the known uplink electrical signal , that is, cancel the secondary modulation existing in the first downlink electrical signal to obtain the second downlink electrical signal.
  • the first downlink electrical signal is modulated and eliminated by the divider, and the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal is offset, so that the uplink and downlink communication of the first optical wireless device can work simultaneously .
  • the foregoing first optical wireless device further includes:
  • the second processing unit is used to perform at least one of the following:
  • uplink electrical signal is used for signal modulation of the above-mentioned first downlink optical signal, or for modulation and elimination of the above-mentioned first downlink electrical signal;
  • receiving a second downlink electrical signal where the second downlink electrical signal is an electrical signal obtained by modulating and canceling the first downlink electrical signal.
  • the first optical wireless device further includes a second processing unit.
  • the second processing unit can be used as a transmitting signal processing unit for sending an uplink electrical signal, and the uplink electrical signal is transmitted to the optical modulator in the first processing unit for signal modulation of the first downlink optical signal.
  • the electrical signal can also be transmitted to a modulation elimination unit for performing modulation elimination on the first downlink electrical signal.
  • the second processing unit may also serve as a received signal processing unit, configured to receive a second downlink electrical signal, where the second downlink electrical signal is an electrical signal after modulation and cancellation of the first downlink electrical signal.
  • the communication function can reduce the complexity of the first optical wireless device and improve the integration degree of the first optical wireless device.
  • the structure of the first optical wireless device shown in the combination or modification of the above-mentioned FIG. 6 and its various possible embodiments will be described respectively below with reference to FIG. 7 to FIG. 12 .
  • FIG. 7 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • the structure of the optical wireless device provided in FIG. 7 can be understood as a reasonable modification or supplement to the first optical wireless device shown in FIG. 6 above.
  • the first optical wireless device includes a first processing unit 10 and a first transceiver unit 20 .
  • the first processing unit 10 includes a lens, a light modulator, and a semi-transmissive mirror, which are sequentially stacked together to form a complete optical structure.
  • the lens in the first processing unit 10 may specifically be a cat's-eye lens.
  • the first downlink optical signal first passes through the lens, then passes through the optical modulator to realize optical signal modulation, and then is divided into two beams of optical signals including the second downlink optical signal and the reflected optical signal after passing through the semi-transmissive mirror.
  • the second downlink optical signal is transmitted to the subsequent first transceiver unit 20.
  • the optical signal is modulated by the optical modulator to obtain an uplink optical signal.
  • the uplink optical signal passes through the lens and is transmitted to the second optical wireless device.
  • the second optical wireless device may specifically be an optical wireless device that sends the first downlink optical signal.
  • the specific source of the above-mentioned second downlink optical signal and the main components through which it passes are: a lens, an optical modulator, a semi-transparent mirror, and the first transceiver unit 20 .
  • the specific source of the above-mentioned uplink optical signal and the main components through which it passes are: a lens, an optical modulator, a semi-transmissive mirror, an optical modulator, a lens, and a second optical wireless device.
  • the first transceiving unit 20 includes a fluorescence collector and a photodetector.
  • the fluorescence collector is used to collect the second downlink optical signal transmitted through the semi-transmissive mirror, excite the fluorescence effect to generate the fluorescence signal, and transmit the fluorescence signal to the photodetector.
  • the fluorescent antenna is not sensitive to the incident direction of the optical signal and can realize large-area light collection. It can be better adapted to a large-area semi-transmissive mirror to achieve high-efficiency reception of the second downlink optical signal in various incident directions.
  • the photodetector is used to photoelectrically change the received fluorescent signal to obtain the first downlink electrical signal.
  • the first transceiver unit 20 can also use a photodetector array, a CMOS photosensitive chip and other devices to realize the reception of the second downlink optical signal and the conversion of the photoelectric signal, in addition to the receiving method of the fluorescence collector and the photodetector. .
  • a set of optical structures composed of the first processing unit 10 and the first transceiver unit 20 can be used to perform optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal, wherein,
  • the uplink optical signal and the second downlink optical signal are two optical signals divided by the first downlink optical signal, the uplink optical signal is used to reflect back to the second optical wireless device, and the second downlink optical signal is used to receive and perform photoelectric change processing to obtain
  • the first downlink electrical signal realizes uplink and downlink communication functions, reduces the complexity of the first optical wireless device, and improves the integration degree of the first optical wireless device.
  • FIG. 8 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • the structure of the optical wireless device provided in FIG. 8 can be understood as a reasonable modification or supplement to the first optical wireless device shown in FIG. 6 or FIG. 7 .
  • the first optical wireless device includes a first processing unit 10 , a first transceiver unit 20 , a modulation cancellation unit 30 and a second processing unit 40 .
  • the first processing unit 10 includes a lens, a light modulator, and a semi-transmissive mirror, which are sequentially stacked together to form a complete optical structure.
  • the lens in the first processing unit 10 may specifically be a cat's-eye lens.
  • the first transceiving unit 20 includes a fluorescence collector and a photodetector.
  • the second downlink optical signal is output to the first transceiver unit 20, and the uplink optical signal is output to the second optical wireless device.
  • the first downlink electrical signal is output.
  • the first optical wireless device in the embodiment of the present application also includes a modulation cancellation unit 30 and a second processing unit 40, whose functions are described as follows:
  • the optical modulator Since the first downlink optical signal passes through the optical modulator during the process of obtaining the second downlink optical signal through optical signal processing, the optical modulator at this time The signal undergoes modulation processing such as light intensity modulation or phase modulation, which causes the modulation caused by the uplink electrical signal to be superimposed on the first downlink optical signal to form a second downlink optical signal with both downlink data and uplink data. This effect is called secondary modulation.
  • the first downlink electrical signal obtained through the photoelectric conversion of the second downlink optical signal also has secondary modulation. Therefore, it is necessary to perform modulation cancellation on the first downlink electrical signal.
  • the first downlink electrical signal output by the photodetector in the first transceiver unit 20 is transmitted to the modulation cancellation unit 30, and the modulation cancellation unit 30 modulates the first downlink electrical signal according to the uplink electrical signal sent by the second processing unit 40 cancel to obtain a second downlink electrical signal, and output the second downlink electrical signal to the second processing unit 40 for subsequent signal processing.
  • the modulation cancellation unit is used to perform modulation cancellation on the first downlink electrical signal to cancel the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal, so that the simultaneous uplink and downlink communication of the first optical wireless device can be realized. Work.
  • FIG. 9 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • the structure of the optical wireless device provided in FIG. 9 can be understood as a reasonable modification or supplement to the first optical wireless device shown in FIG. 6 or 7 or 8 above.
  • the first optical wireless device includes a first processing unit 10 , a first transceiver unit 20 , a modulation cancellation unit 30 and a second processing unit 40 .
  • the first processing unit 10 includes a lens, a light modulator, and a semi-transmissive mirror, which are sequentially stacked together to form a complete optical structure.
  • the lens in the first processing unit 10 may specifically be a cat's-eye lens.
  • the first transceiving unit 20 includes a fluorescence collector and a photodetector.
  • the modulation elimination unit 30 includes a time delay calculation unit, a signal reconstruction unit, a divider and multiple splitters.
  • the second processing unit 40 includes a receiving signal processing unit and a transmitting signal processing unit.
  • the functions of the first processing unit 10, the first transceiver unit 20, the modulation canceling unit 30, and the second processing unit 40, as well as the signal flow through the above functional units, are consistent with the above description in FIG. 8, here I won't repeat them here.
  • the first downlink electrical signal output by the photodetector in the first transceiver unit 20 is respectively transmitted to the time delay calculation unit and the divider in the modulation elimination unit 30 through a splitter.
  • the uplink electrical signal output by the transmission signal processing unit in the second processing unit 40 is respectively transmitted to the delay calculation unit and the signal reconstruction unit in the modulation elimination unit 30 through a splitter.
  • the time delay calculation unit calculates the target time delay according to the received uplink electrical signal and the first downlink electrical signal, and the target time delay is that the transmit signal processing unit inputs the uplink electrical signal to the optical modulator in the first processing unit 10 to
  • the time delay between the generation of the first downlink electrical signal by the photodetector in the first transceiver unit 20 is the time delay between when the delay calculation unit receives the uplink electrical signal sent by the transmitting signal processing unit and when it receives the first downlink electrical signal sent by the photodetector. Time delay between electrical signals.
  • the time delay calculation unit transmits the calculated target time delay to the signal reconstruction unit.
  • the signal reconstruction unit reconstructs the first downlink electrical signal according to the received target time delay and the uplink electrical signal, cancels the time delay existing in the first downlink electrical signal, and cancels the time delay of the first downlink electrical signal
  • the electrical signal is transmitted to the divider.
  • the divider modulates and eliminates the first downlink electrical signal according to the known uplink electrical signal, that is, cancels the secondary modulation existing in the first downlink electrical signal, and obtains the second downlink electrical signal, which can realize the uplink and downlink of the first optical wireless device Line communication works at the same time. And output the second downlink electrical signal to the received signal processing unit in the second processing unit 40 for subsequent signal processing.
  • the above delay calculation unit and signal reconstruction unit can be bypassed, especially in dense and compact optical wireless terminal scenarios, which can make optical wireless devices Miniaturization and high integration.
  • the divider directly performs secondary modulation and cancellation processing on the first downlink electrical signal output by the photodetector according to the uplink electrical signal.
  • the above-mentioned modulation elimination unit 30 may further include an adjustable attenuator, which may be used to adjust the signal amplitude of the first downlink electrical signal, so as to realize efficient downlink communication.
  • an adjustable attenuator which may be used to adjust the signal amplitude of the first downlink electrical signal, so as to realize efficient downlink communication.
  • the above-mentioned time delay calculation unit may be a time-to-digital converter, which can be used to calculate the target time delay between the input of the uplink electrical signal and the generation of the first downlink electrical signal, and output a high-precision target time delay parameters.
  • the above-mentioned signal reconstruction unit may be a delayer, which is used to reconstruct the first downlink electrical signal according to the target time delay, offset the time delay existing in the first downlink electrical signal, and realize efficient downlink communication.
  • the modulation cancellation unit is used to perform modulation cancellation on the first downlink electrical signal to cancel the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal, so that the simultaneous uplink and downlink communication of the first optical wireless device can be realized. Work.
  • FIG. 10 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • the structure of the optical wireless device provided in FIG. 10 can be understood as a reasonable modification or supplement to the first optical wireless device shown in FIG. 6 or 7 or 8 or 9 above.
  • the first optical wireless device includes a semi-transmissive mirror, two total reflection lenses, a light modulator, a fluorescence collector, a photodetector, a modulation cancellation unit 30 and a second processing unit 40 .
  • one semi-transmissive mirror, two total reflection lenses and a light modulator constitute the above-mentioned first processing unit 10
  • the fluorescence collector and photodetector constitute the above-mentioned first transceiver unit 20 .
  • the function description and signal flow direction of the modulation cancellation unit 30 and the second processing unit 40 in the embodiment of the present application are consistent with those in the above-mentioned FIG. 6 or FIG. 7 or FIG. 8 or FIG. 9 , and will not be repeated here.
  • two total reflection lenses combined with a semi-transmissive mirror are placed vertically to form a complete three-dimensional reflective-transmissive optical structure.
  • the light modulator covers the reflective-transmissive optical structure to form a closed space.
  • the fluorescence collector based on the fluorescent antenna is stacked with the semi-transmissive mirror.
  • a photodetector stacked with a fluorescence collector.
  • the first downlink optical signal first passes through the optical modulator, and after optical signal processing is performed by the above-mentioned reflection-transmission optical structure, a second downlink optical signal and an uplink optical signal are generated.
  • the second downlink optical signal is used for receiving by the fluorescence collector, and the uplink light The signal is used for reflection back to the second optical wireless device.
  • the specific sources of the above-mentioned second downlink optical signal and the main components passing through are: an optical modulator, a reflection-transmission optical structure, and a fluorescence collector.
  • the specific source of the above-mentioned uplink optical signal and the main components through which it passes are: an optical modulator, a reflective-transmissive optical structure, an optical modulator, and a second optical wireless device.
  • the reflection-transmittance ratio of the half-transmissive mirror may be 1:1.
  • the ratio of the second downlink optical signal to the uplink optical signal generated by the first downlink optical signal is Also 1:1.
  • the reflective transmittance ratio of the semi-transmissive mirror can be adjusted, which is not specifically limited or restricted in this application.
  • FIG. 10 is a simplified diagram of each functional unit constituting the first processing unit 10 and the first transceiver unit 20, which is only used as an exemplary diagram to better understand the structure of the optical wireless device in the embodiment of the present application. This should not limit the structure of the optical wireless device in the embodiment of the present application.
  • two total reflection lenses combined with a semi-transmissive mirror can be placed perpendicular to each other to form a complete three-dimensional reflection-transmission optical structure, and optical signal processing is performed on the first downlink optical signal to obtain the uplink optical signal and the second Two downlink optical signals, wherein the uplink optical signal and the second downlink optical signal are two optical signals divided by the first downlink optical signal, the uplink optical signal is used for reflection back to the second optical wireless device, and the second downlink optical signal is used for The first downlink electrical signal is obtained by receiving and performing photoelectric change processing, so as to realize the uplink and downlink communication functions, reduce the complexity of the first optical wireless device, and improve the integration degree of the first optical wireless device.
  • FIG. 11 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • the structure of the optical wireless device provided in FIG. 11 can be understood as a reasonable modification or supplement to the first optical wireless device shown in FIG. 6 or FIG. 7 or FIG. 8 or FIG. 9 or FIG. 10 .
  • the first optical wireless device includes three semi-transmissive mirrors, an optical modulator, three fluorescence collectors, three photodetectors, a combiner, a modulation cancellation unit 30 and a second processing unit 40 .
  • three semi-transmissive mirrors are placed perpendicular to each other to form a complete three-dimensional reflection-transmission optical structure.
  • the light modulator covers the reflection-transmission optical structure to form a closed space.
  • Three fluorescence collectors based on fluorescent antennas are stacked with three semi-transmission mirrors respectively.
  • three photodetectors are stacked with three fluorescence collectors respectively.
  • the first downlink optical signal first passes through the optical modulator, and after optical signal processing is performed by the above-mentioned reflection-transmission optical structure, a second downlink optical signal and an uplink optical signal are generated, and the uplink optical signal is used to be reflected back to the second optical wireless device.
  • the two downlink optical signals are used for receiving by the fluorescence collectors, and the three fluorescence collectors respectively output fluorescence signals and transmit them to the corresponding photodetectors, and each photodetector performs photoelectric changes on the received fluorescence signals to output electrical signals.
  • the three electrical signals output by the three photodetectors are combined into an electrical signal through a combiner, which is the above-mentioned first downlink electrical signal, and transmitted to the modulation elimination unit 30 .
  • the specific sources of the above-mentioned second downlink optical signal and the main components passing through are: an optical modulator, a reflection-transmission optical structure, and a fluorescence collector.
  • the specific source of the above-mentioned uplink optical signal and the main components through which it passes are: an optical modulator, a reflective-transmissive optical structure, an optical modulator, and a second optical wireless device.
  • the reflection-transmission ratio of the above-mentioned half-transmission mirrors can be 4:1.
  • the reflection-transmission ratios of the three half-transmission mirrors are all 4:1, the first downlink optical signal will generate the second downlink optical signal after three times of reflection and transmission.
  • the ratio of the optical signal to the uplink optical signal is close to 1:1.
  • the reflective transmittance ratio of each semi-transparent mirror can be adjusted, which is not specifically limited or restricted in this application.
  • FIG. 11 is a simplified diagram of each functional unit constituting the first processing unit 10 and the first transceiver unit 20, which is only used as an exemplary diagram to better understand the structure of the optical wireless device in the embodiment of the present application. This should not limit the structure of the optical wireless device in the embodiment of the present application.
  • three semi-transmissive mirrors can be placed perpendicular to each other to form a complete three-dimensional reflection-transmission optical structure, and optical signal processing is performed on the first downlink optical signal to obtain the uplink optical signal and the second downlink optical signal.
  • the uplink optical signal and the second downlink optical signal are two optical signals divided by the first downlink optical signal, the uplink optical signal is used to reflect back to the second optical wireless device, and the second downlink optical signal is used to receive and perform photoelectric changes
  • the first downlink electrical signal is obtained through processing, thereby realizing uplink and downlink communication functions, reducing the complexity of the first optical wireless device, and improving the integration degree of the first optical wireless device.
  • FIG. 12 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • the structure of the optical wireless device provided in FIG. 12 can be understood as a reasonable modification or supplement to the first optical wireless device shown in FIG. 6 or FIG. 7 or FIG. 8 or FIG. 9 or FIG. 10 or FIG. 11 .
  • the first optical wireless device includes a plurality of functional modules composed of the first processing unit and the first transceiver unit (such as the functional module 1 composed of the first processing unit 1 and the first transceiver unit 1, composed of The functional module 2 composed of the first processing unit 2 and the first transceiver unit 2 , the functional module n composed of the first processing unit n and the first transceiver unit n, etc.), the modulation canceling unit 30 and the second processing unit 40 .
  • the functional module 1 composed of the first processing unit 1 and the first transceiver unit 1
  • the functional module n composed of the first processing unit n and the first transceiver unit n, etc.
  • the functional description and signal flow of the first processing unit n, the first transceiver unit n, the modulation cancellation unit 30 and the second processing unit 40 in the embodiment of the present application are the same as those in the above-mentioned FIG. 6 or FIG. 7 or FIG. 8 or FIG. 9 Or the same as in FIG. 10 or FIG. 11 , which will not be repeated here.
  • the embodiment of the present application is expanded on the basis of the above-mentioned embodiments shown in FIGS.
  • the selection of the first transceiver unit specifically, when the second processing unit 40 selects the first transceiver unit 1 through the interface tx1, the modulation elimination unit 30 selects the first processing unit 1 through the interface rx1, and when the second processing unit 40 selects the first processing unit 1 through the interface tx2
  • the modulation elimination unit 30 selects the first processing unit 2 through the interface rx2
  • the modulation elimination unit 30 selects the first processing unit through the interface rxn Unit n.
  • the signal receiving and emitting angles of the entire optical wireless device can be expanded, thereby expanding the range of receiving and reflecting light.
  • the structure of the optical wireless network device in the above-mentioned embodiment shown in FIG. 3 (that is, the second optical wireless device in the above-mentioned embodiment shown in FIG. 6 to FIG. 12 ) will be described below with reference to FIG. 13 .
  • FIG. 13 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
  • the optical wireless device shown in the embodiment of the present application includes but is not limited to a light source, a biaser, an optical front end, a transceiver front end, a modulation cancellation unit, a transmitter signal processing unit, and a receiver signal processing unit.
  • the optical wireless device in this embodiment may also be called a second optical wireless device.
  • the light source of the second optical wireless network device emits a downlink optical signal, and the downlink optical signal realizes downlink modulation according to the downlink electrical signal sent by the transmitter signal processing unit, and the downlink electrical signal sent by the transmitter signal processing unit is amplified by the biaser Afterwards, it is transmitted to the light source for downlink modulation of the downlink optical signal emitted by the light source.
  • the light source may be a laser.
  • the downlink optical signal after being downlink modulated is transmitted to the first optical wireless device after passing through the optical front end.
  • the optical front end of the second optical wireless device will also receive the uplink optical signal sent by the first optical wireless device, and transmit the uplink optical signal to the transceiver front end.
  • the transceiver front end may include a fluorescence collector and a photodetector (or photodetector array).
  • the fluorescence collector is used to collect the upstream light signal, excite the fluorescence effect to generate the fluorescence signal, and transmit the fluorescence signal to the photodetector.
  • the fluorescent antenna is not sensitive to the incident direction of the optical signal and can realize large-area light collection. It can be better adapted to a large-area semi-transmissive mirror to achieve high-efficiency reception of uplink optical signals in various incident directions.
  • the photodetector is used to photoelectrically change the received fluorescent signal to obtain a first uplink electrical signal, and output the first uplink electrical signal to the modulation canceling unit.
  • the transceiver front-end combined with the fluorescence collector and the photodetector can be used to realize efficient reception of uplink optical signals in various incident directions, and convert them into first uplink electrical signals, thereby realizing the uplink communication function .
  • the first downlink optical signal Before the first downlink optical signal is transmitted, the first downlink optical signal will be subjected to modulation processing such as light intensity modulation or phase modulation according to the received downlink electrical signal, so that the modulation caused by the downlink electrical signal will be superimposed on the first downlink optical signal.
  • the downlink optical signal forms an uplink optical signal with both downlink data and uplink data. This effect is called secondary modulation.
  • the first uplink electrical signal obtained through photoelectric conversion of the uplink optical signal also has secondary modulation.
  • the modulation and elimination unit receives the first uplink electrical signal and the downlink electrical signal output by the transmitter signal processing unit, and based on the downlink electrical signal, performs modulation and cancellation on the first uplink electrical signal, that is, cancels the first uplink electrical signal.
  • the second modulation is performed to obtain the second uplink electrical signal, and the processed second uplink electrical signal is output to the receiver signal processing unit for subsequent signal processing.
  • the modulation canceling unit is used to cancel the modulation of the first uplink electrical signal to cancel the secondary modulation caused by the downlink electrical signal in the first uplink electrical signal, so that the uplink and downlink communication of the second optical wireless device can work simultaneously.
  • the modulation elimination unit may include a delay calculation unit and a signal reconstruction unit.
  • the time delay calculation unit is used to calculate the time delay between the input of the downlink electrical signal and the generation of the first uplink electrical signal, which is recorded as the target time delay.
  • the signal reconstruction unit is used to reconstruct the first uplink electrical signal according to the target time delay, offset the time delay existing in the first uplink electrical signal, and then modulate and eliminate the first uplink electrical signal.
  • the delay calculation unit and the signal reconstruction unit are used to cancel the delay existing in the first uplink electrical signal, so that the second optical wireless device can work simultaneously in uplink and downlink communication.
  • the delay calculation unit includes a time-to-digital converter.
  • the time-to-digital converter can be used to calculate the target time delay between the input of the downlink electrical signal and the generation of the first uplink electrical signal, and output high-precision parameters of the target time delay.
  • the above-mentioned signal reconstruction unit includes a delayer.
  • the delayer can be used to reconstruct the first uplink electrical signal according to the target time delay, offset the time delay existing in the first uplink electrical signal, and realize efficient uplink communication.
  • the signal reconstruction unit may also include an adjustable attenuator.
  • the adjustable attenuator can be used to adjust the signal amplitude of the first uplink electrical signal to realize efficient uplink communication.
  • the modulation elimination unit may also include a divider.
  • the divider is used to perform modulation and elimination on the first uplink electrical signal according to the known downlink electrical signal, that is, cancel the secondary modulation existing in the first uplink electrical signal, and obtain the second uplink electrical signal.
  • the first uplink electrical signal is modulated and eliminated by the divider, and the secondary modulation caused by the downlink electrical signal in the first uplink electrical signal is canceled out, so that the second optical wireless device can work simultaneously for uplink and downlink communication.
  • the present application also provides A corresponding optical wireless communication method is proposed, by performing optical signal processing on the first downlink optical signal, an uplink optical signal and a second downlink optical signal are obtained, wherein the uplink optical signal and the second downlink optical signal are the first downlink optical signal Divided into two optical signals, the uplink optical signal is used to reflect back to the second optical wireless device, the second downlink optical signal is used to receive and perform photoelectric change processing to obtain the first downlink electrical signal, thereby realizing uplink and downlink communication functions, and The complexity of the optical wireless equipment can be reduced, and the integration degree of the optical wireless equipment can be improved.
  • optical wireless communication method provided by the present application will be described below with reference to FIG. 14 to FIG. 19 .
  • FIG. 14 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the communication method is applied in the technical field of optical communication.
  • the communication system to which the communication method according to the embodiment of the present application is applied includes but is not limited to a first optical wireless device and a second optical wireless device.
  • the communication method of the embodiment of the present application may include steps S1401, S1402, S1403, S1404, and S1405, wherein, the execution sequence of steps S1401, S1402, S1403, S1404, and S1405 is not limited by this embodiment of the present application , specifically, the communication method includes but is not limited to the following steps:
  • Step S1401 the second optical wireless device sends a first downlink optical signal to the first optical wireless device.
  • the second optical wireless device sends the first downlink optical signal to the first optical wireless device, and correspondingly, the first optical wireless device receives the first downlink optical signal sent by the second optical wireless device.
  • the second optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and may be a network device such as a base station. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above.
  • the first optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and it may be a terminal device such as a UE. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above. Examples of optical wireless terminal equipment.
  • Step S1402 the first optical wireless device performs optical signal processing on the first downlink optical signal to obtain a second downlink optical signal and an uplink optical signal.
  • the first optical wireless device performs optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal. It can be understood that, after optical signal processing, the first downlink optical signal is divided into at least two optical signals of an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal is used for reflection back to the second optical wireless device, and the second The downlink optical signal is received by the first optical wireless device in this embodiment itself.
  • the ratio of the first downlink optical signal into the uplink optical signal and the second downlink optical signal after optical signal processing can be adjusted according to different scenarios, which is not specifically limited or restricted in this application.
  • the first optical wireless device may also perform modulation processing such as optical intensity modulation or phase modulation on the first downlink optical signal according to the uplink electrical signal.
  • modulation processing such as optical intensity modulation or phase modulation on the first downlink optical signal according to the uplink electrical signal.
  • optical signal processing is performed on the modulated first downlink optical signal, and divided into a reflected optical signal and a second downlink optical signal, and the second downlink optical signal is received by the first optical wireless device in this embodiment itself.
  • modulation processing such as light intensity modulation or phase modulation on the reflected optical signal according to the uplink electrical signal to obtain an uplink optical signal, and then reflect the uplink optical signal back to the second optical wireless device.
  • modulation processing such as intensity modulation or phase modulation can be performed on the optical signal, so that the modulated second downlink optical signal can effectively carry the downlink data, and the modulated uplink optical signal can effectively carry the uplink data, thereby simultaneously Realize the uplink and downlink communication functions of the first optical wireless equipment.
  • Step S1403 the first optical wireless device sends an uplink optical signal to the second optical wireless device.
  • the first optical wireless device sends an uplink optical signal to the second optical wireless device, and correspondingly, the second optical wireless device receives the uplink optical signal sent by the first optical wireless device.
  • Step S1404 the first optical wireless device performs photoelectric change processing on the second downlink optical signal to obtain the first downlink electrical signal.
  • the first optical wireless device generates a fluorescent signal according to the received second downlink optical signal, and then performs photoelectric changes on the fluorescent signal to obtain the first downlink electrical signal.
  • photoelectric changes are performed on the multiple fluorescent signals to obtain multiple electrical signals, and then the multiple electrical signals are combined to obtain the first downlink optical signal. line electrical signal.
  • the fluorescent effect can be used to efficiently receive the second downlink optical signals in various incident directions and convert them into first downlink electrical signals, thereby realizing the downlink communication function.
  • the first optical wireless device will also perform modulation and cancellation on the first downlink electrical signal to obtain the second downlink electrical signal.
  • the first downlink optical signal will be modulated according to the uplink electrical signal such as light intensity modulation or phase modulation, resulting in the uplink electrical signal
  • the resulting modulation will be superimposed on the first downlink optical signal to form a second downlink optical signal with both downlink data and uplink data.
  • This effect is called secondary modulation.
  • the first downlink electrical signal obtained through the photoelectric conversion of the second downlink optical signal also has secondary modulation.
  • the first optical wireless device modulates and eliminates the first downlink electrical signal according to the known uplink electrical signal, that is, cancels the secondary modulation existing in the first downlink electrical signal, and obtains the second downlink electrical signal.
  • the first optical wireless device may calculate the time delay between inputting the uplink electrical signal and generating the first downlink electrical signal, and record it as the target time delay, and then reconstruct the first downlink electrical signal according to the target time delay, The time delay existing in the first downlink electrical signal is canceled out, and then the first downlink electrical signal is modulated and eliminated to obtain a second downlink electrical signal.
  • the first downlink electrical signal is modulated and eliminated, and the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal is canceled out, so that the first optical wireless device can work simultaneously in uplink and downlink communication.
  • Step S1405 the second optical wireless device performs photoelectric change processing on the uplink optical signal to obtain the first uplink electrical signal.
  • the second optical wireless device generates a fluorescent signal according to the received uplink optical signal, and then performs photoelectric changes on the fluorescent signal to obtain the first uplink electrical signal.
  • the fluorescence effect can be used to realize high-efficiency reception of uplink optical signals in various incident directions and convert them into first uplink electrical signals, thereby realizing an uplink communication function.
  • the second optical wireless device will also perform modulation and cancellation on the first uplink electrical signal to obtain a second uplink electrical signal.
  • the first downlink optical signal Before the first downlink optical signal is transmitted, the first downlink optical signal will be subjected to modulation processing such as light intensity modulation or phase modulation according to the received downlink electrical signal, so that the modulation caused by the downlink electrical signal will be superimposed on the first downlink optical signal.
  • the downlink optical signal forms an uplink optical signal with both downlink data and uplink data. This effect is called secondary modulation.
  • the first uplink electrical signal obtained through photoelectric conversion of the uplink optical signal also has secondary modulation.
  • the second optical wireless device modulates and eliminates the first uplink electrical signal according to the known downlink electrical signal, that is, cancels the secondary modulation existing in the first uplink electrical signal, and obtains the second downlink electrical signal.
  • the second optical wireless device may first calculate the delay between the input of the downlink electrical signal and the generation of the first uplink electrical signal, and record it as the target delay, and then reconstruct the first uplink electrical signal according to the target delay to offset The time delay existing in the first uplink electrical signal is then modulated and eliminated to obtain the second downlink electrical signal.
  • the first uplink electrical signal is modulated and eliminated, and the secondary modulation caused by the downlink electrical signal in the first uplink electrical signal is canceled out, so that the second optical wireless device can work simultaneously for uplink and downlink communication.
  • FIG. 15 is a schematic flow chart of another communication method provided by an embodiment of the present application, which can also be understood as a modification or supplement to the flow chart of the communication method in FIG. 14 above.
  • the communication system to which the communication method according to the embodiment of the present application is applied includes but is not limited to a first optical wireless device and a second optical wireless device.
  • the communication method of the embodiment of the present application may include steps S1501, S1502, S1503, S1504, S1505, and S1506, wherein, the execution sequence of steps S1501, S1502, S1503, S1504, S1505, and S1506,
  • the communication method includes but is not limited to the following steps:
  • Step S1501 the second optical wireless device sends a positioning signal to the first optical wireless device.
  • the second optical wireless device sends a positioning signal to the first optical wireless device, and correspondingly, the first optical wireless device receives the positioning signal sent by the second optical wireless device. At this time, the first optical wireless device does not transmit an uplink signal.
  • the positioning signal may be a pulse signal, a frequency modulated continuous wave (frequency modulated continuous wave, FMCW) signal, an ultra-wideband (Ultra-Wideband, UWB) signal, an on-off key modulation format (On-Off Key, OOK) signal, etc., It is used for measuring distance information between the first optical wireless device and the second optical wireless device.
  • FMCW frequency modulated continuous wave
  • UWB ultra-wideband
  • OOK On-Off Key
  • the second optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and may be a network device such as a base station. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above.
  • the first optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and it may be a terminal device such as a UE. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above. Examples of optical wireless terminal equipment.
  • Step S1502 the second optical wireless device determines a modulation cancellation parameter.
  • the second optical wireless device determines the modulation elimination parameter according to the distance information between the first optical wireless device and the second optical wireless device measured by the positioning signal.
  • the modulation elimination parameter is a parameter for the second optical wireless device to modulate and eliminate the uplink optical signal, and the modulation elimination parameter is used to perform modulation and elimination on the uplink optical signal when the second optical wireless device communicates with the first optical wireless device. , so as to realize the simultaneous work of uplink and downlink communication.
  • Step S1503 the second optical wireless device sends a communication request to the first optical wireless device.
  • the second optical wireless device After the second optical wireless device determines the parameters for performing modulation and cancellation on the uplink optical signal, the second optical wireless device sends a communication request to the first optical wireless device for requesting data transmission with the first optical wireless device. Correspondingly, the first optical wireless device receives the communication request sent by the second optical wireless device. At this time, the second optical wireless device only outputs an optical carrier that does not carry any modulation.
  • Step S1504 the first optical wireless device determines the modulation cancellation parameter, and enables the sending and receiving function.
  • the first optical wireless device After receiving the communication request sent by the second optical wireless device, the first optical wireless device determines the modulation cancellation parameters, and turns on the transceiver function, and prepares for data transmission with the second optical wireless device, that is, executes the communication method in FIG. 14 above.
  • the modulation elimination parameter is a parameter for the first optical wireless device to modulate and eliminate the first downlink electrical signal
  • the modulation elimination parameter is used for data transmission between the first optical wireless device and the second optical wireless device.
  • the upstream and downstream electrical signals are modulated and eliminated, so as to realize the simultaneous operation of uplink and downlink communications.
  • Step S1505 the first optical wireless device sends a response message to the second optical wireless device.
  • the first optical wireless device will simultaneously send a response message to the second optical wireless device in response to the communication request.
  • the second optical wireless device receives the response message sent by the first optical wireless device.
  • Step S1506 the second optical wireless device turns on the sending and receiving function.
  • the second optical wireless device After receiving the response message corresponding to the communication request, the second optical wireless device turns on the sending and receiving function, and prepares to perform data transmission with the first optical wireless device, that is, executes the communication method in FIG. 14 above.
  • the communication method in the embodiment of the present application is applied to the initialization stage before the data transmission between the first optical wireless device and the second optical wireless device, and the modulation and elimination parameters of the second optical wireless device are determined through the positioning signal, and determined through the communication request and response message
  • FIG. 16 is a schematic flow chart of another communication method provided by the embodiment of the present application, which can also be understood as a modification or supplement to the flow chart of the communication method in FIG. 14 or FIG. 15 above.
  • the communication system to which the communication method according to the embodiment of the present application is applied includes but is not limited to a first optical wireless device and a second optical wireless device.
  • the communication method of the embodiment of the present application may include steps S1601, S1602, and S1603, wherein the execution sequence of steps S1601, S1602, and S1603 is not limited by the embodiment of the present application.
  • the communication method includes But not limited to the following steps:
  • Step S1601 the first optical wireless device detects that a calibration condition is satisfied, and triggers a calibration mechanism.
  • the first optical wireless device detects that a calibration condition is met, and triggers a calibration mechanism.
  • the calibration conditions include but are not limited to: the transmission distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or uplink optical signal decreases, and the bit error rate increases.
  • the first optical wireless device triggers the calibration mechanism, it stops sending uplink data to the second optical wireless device.
  • the second optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and may be a network device such as a base station. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above.
  • the first optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and it may be a terminal device such as a UE. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above. Examples of optical wireless terminal equipment.
  • Step S1602 the first optical wireless device sends a calibration request to the second optical wireless device.
  • the first optical wireless device When the first optical wireless device triggers the calibration mechanism, it will also send a calibration request to the second optical wireless device, which is used to request the second optical wireless device to update parameters for performing modulation cancellation on the uplink optical signal.
  • the second optical wireless device receives the calibration request sent by the first optical wireless device.
  • the first optical wireless device will also send a downlink data stop indication to the second optical wireless device, for instructing the second optical wireless device to stop sending downlink data to the first optical wireless device.
  • the second optical wireless device receives the downlink data stop sending instruction sent by the first optical wireless device.
  • Step S1603 the second optical wireless device starts a calibration mechanism.
  • the second optical wireless device After receiving the calibration request sent by the first optical wireless device, the second optical wireless device starts a calibration mechanism. It mainly includes stopping the data transmission with the first optical wireless device, and updating the parameters for performing modulation and elimination on the uplink optical signal.
  • the parameters for modulating and eliminating the uplink optical signal can be updated in time, ensuring the establishment of a stable and reliable communication link between the first optical wireless device and the second optical wireless device, and improving the stability in high-speed communication application scenarios , so as to realize simultaneous operation of uplink and downlink communication, and improve uplink and downlink communication efficiency.
  • FIG. 17 is a schematic flow chart of another communication method provided by the embodiment of the present application, which can also be understood as a modification or supplement to the flow chart of the communication method in FIG. 14 , FIG. 15 , or FIG. 16 .
  • the communication system to which the communication method according to the embodiment of the present application is applied includes but is not limited to a first optical wireless device and a second optical wireless device.
  • the communication method of this embodiment of the application may include steps S1701, S1702, and S1703, wherein the execution order of steps S1701, S1702, and S1703 is not limited by this embodiment of this application.
  • the communication method includes But not limited to the following steps:
  • Step S1701 the second optical wireless device detects that a calibration condition is satisfied, and triggers a calibration mechanism.
  • the second optical wireless device detects that the calibration condition is met, and triggers a calibration mechanism.
  • the calibration conditions include but are not limited to: the transmission distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or uplink optical signal decreases, and the bit error rate increases.
  • the second optical wireless device triggers the calibration mechanism, it stops sending downlink data to the first optical wireless device, and updates parameters for performing modulation and cancellation on the uplink optical signal.
  • the second optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and may be a network device such as a base station. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above.
  • the first optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and it may be a terminal device such as a UE. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above. Examples of optical wireless terminal equipment.
  • Step S1702 the second optical wireless device sends a calibration instruction to the first optical wireless device.
  • the second optical wireless device When the second optical wireless device triggers the calibration mechanism, it will also send a calibration indication to the first optical wireless device, for instructing the first optical wireless device to update parameters for performing modulation and cancellation on the first downlink optical signal.
  • the first optical wireless device receives the calibration request sent by the second optical wireless device.
  • the second optical wireless device will also send an instruction to stop sending uplink data to the first optical wireless device, for instructing the first optical wireless device to stop sending uplink data to the second optical wireless device.
  • the first optical wireless device receives the uplink data stop sending instruction sent by the second optical wireless device.
  • Step S1703 the first optical wireless device starts a calibration mechanism.
  • the first optical wireless device After receiving the calibration instruction sent by the second optical wireless device, the first optical wireless device starts a calibration mechanism. It mainly includes stopping data transmission with the second optical wireless device, and updating parameters for performing modulation and elimination on the first downlink optical signal.
  • the second optical wireless device and the first optical wireless device will re-enter the initialization phase, that is, execute the communication method in FIG. 15 above.
  • the parameters for modulating and eliminating the uplink optical signal can be updated in time, ensuring the establishment of a stable and reliable communication link between the first optical wireless device and the second optical wireless device, and improving the stability in high-speed communication application scenarios , so as to realize simultaneous operation of uplink and downlink communication, and improve uplink and downlink communication efficiency.
  • the calibration mechanism is triggered by factors such as changes in communication distance, reduction in communication rate, and increase in bit error rate, and the main body that initiates the calibration mechanism can be the first optical wireless device or the second optical wireless device.
  • Optical wireless devices can be the first optical wireless device or the second optical wireless device.
  • the calibration mechanism can also be divided into intermittent calibration and continuous calibration according to the strategy of implementing monitoring and time-sharing monitoring.
  • the above-mentioned embodiments shown in FIG. 16 and FIG. 17 are intermittent calibration, that is, after the first optical wireless device and the second optical wireless device complete the calibration, they re-enter the initialization phase, that is, execute the communication method in FIG. 15 above.
  • Figure 18 and Figure 19 are schematic flowcharts of another communication method provided by the embodiment of this application, which can also be understood as the communication method in Figure 14 or Figure 15 or Figure 16 or Figure 17 Variations or additions to flowcharts.
  • the communication system to which the communication method according to the embodiment of the present application is applied includes but is not limited to a first optical wireless device and a second optical wireless device.
  • the second optical wireless device can continuously send positioning signals for real-time measurement of the distance between the second optical wireless device and the first wireless device.
  • a communication distance between optical wireless devices When the distance changes, the communication rate decreases, or the bit error rate increases, the second optical wireless device can use the communication distance measured in real time to actively update the parameters for modulating and eliminating the uplink optical signal.
  • the positioning signal may be a pulse signal, an FMCW signal, a UWB signal, an OOK signal, and the like.
  • the positioning signal and the downlink data may be output through the second optical wireless device in a radio frequency band different from that of the downlink data.
  • the positioning signal may also be simultaneously transmitted in the same frequency band as the UWB signal and the downlink data.
  • the first optical wireless device determines that data needs to be refreshed based on factors such as communication rate or bit error rate, it sends a refresh request to the second optical wireless device.
  • the second optical wireless device actively updates the parameters for performing modulation and cancellation on the uplink optical signal.
  • the parameters for modulating and eliminating the uplink optical signal can be updated in time, ensuring the establishment of a stable and reliable communication link between the first optical wireless device and the second optical wireless device, and improving the stability in high-speed communication application scenarios , so as to realize simultaneous operation of uplink and downlink communication, and improve uplink and downlink communication efficiency.
  • the first optical wireless device and the second optical wireless device include hardware structures and/or software modules corresponding to each function, specifically, The structure of the optical wireless device shown in FIGS. 6 to 13 described above.
  • the application can also be implemented in the form of hardware, software, or a combination of hardware and software. Whether a certain function is executed by hardware, software, or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.
  • FIG. 20 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 200 may include a transceiver unit 2001 and a processing unit 2002 .
  • the transceiver unit 2001 and the processing unit 2002 may be software, or hardware, or a combination of software and hardware.
  • the transceiver unit 2001 may implement a sending function and/or a receiving function, and the transceiver unit 2001 may also be described as a communication unit.
  • the transceiver unit 2001 may also be a unit integrating an acquisition unit and a sending unit, wherein the acquisition unit is used to realize the receiving function, and the sending unit is used to realize the sending function.
  • the transceiver unit 2001 may be used to receive information sent by other devices, and may also be used to send information to other devices.
  • the communication device 200 may correspond to the first optical wireless device in the method embodiments shown in FIGS. It is the chip in the First Optical wireless device.
  • the communication device 200 may include units for performing the operations performed by the first optical wireless device in the method embodiments shown in FIGS. 14 to operations performed by the first optical wireless device in the method embodiments shown in FIG. 19 . Among them, the description of each unit is as follows:
  • the processing unit 2002 is configured to perform optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal; wherein, the uplink optical signal and the second downlink optical signal are the first downlink optical signal
  • the uplink optical signal is divided into two optical signals, and the uplink optical signal is used for reflection back to the second optical wireless device;
  • the processing unit 2002 is further configured to obtain a first downlink electrical signal according to the acquired second downlink optical signal.
  • the processing unit 2002 is further configured to perform intensity modulation or phase modulation on the optical signal.
  • the processing unit 2002 is further configured to generate a fluorescence signal according to the second downlink optical signal
  • the processing unit 2002 is further configured to perform photoelectric changes on the fluorescent signal to obtain the first downlink electrical signal.
  • the processing unit 2002 is further configured to perform photoelectric changes on a plurality of fluorescent signals to obtain a plurality of electrical signals;
  • the processing unit 2002 is further configured to combine the multiple electrical signals to obtain the first downlink electrical signal.
  • the processing unit 2002 is further configured to perform modulation and cancellation on the first downlink electrical signal according to the uplink electrical signal to obtain a second downlink electrical signal.
  • the processing unit 2002 is further configured to calculate a target delay, where the target delay is a delay between inputting the uplink electrical signal and generating the first downlink electrical signal ;
  • the processing unit 2002 is further configured to reconstruct the first downlink electrical signal according to the target time delay.
  • the transceiver unit 2001 is configured to receive a positioning signal sent by the second optical wireless device, where the positioning signal is used to determine the distance between the second optical wireless device and the communication device. distance information, where the distance information is used by the second optical wireless device to determine parameters for performing modulation and cancellation on the uplink optical signal.
  • the transceiver unit 2001 is further configured to receive a communication request sent by the second optical wireless device;
  • the processing unit 2002 is further configured to determine parameters for performing modulation and cancellation on the first downlink electrical signal
  • the transceiver unit 2001 is further configured to send a response message to the second optical wireless device in response to the communication request.
  • the transceiver unit 2001 is further configured to send a calibration request to the second optical wireless device when the calibration condition is satisfied; wherein the calibration request is used to request the first
  • the second optical wireless device updates parameters for performing modulation and elimination on the uplink optical signal, and the calibration conditions include one or more of the following: a change in distance between the second optical wireless device and the first optical wireless device, The transmission rate of the first downlink optical signal or the uplink optical signal decreases, and the bit error rate increases.
  • the communication device 200 may correspond to the second optical wireless device in the method embodiments shown in FIGS. It may be a chip in the second optical wireless device.
  • the communication device 200 may include units for performing the operations performed by the second optical wireless device in the method embodiments shown in FIGS. 14 to operations performed by the second optical wireless device in the method embodiments shown in FIG. 19 . Among them, the description of each unit is as follows:
  • the transceiver unit 2001 is configured to transmit a first downlink optical signal to a first optical wireless device; wherein, the first downlink optical signal is divided into an uplink optical signal and a second downlink optical signal after optical signal processing, and the uplink optical signal a signal for reflection back to said communication device;
  • the processing unit 2002 is configured to obtain a first uplink electrical signal according to the acquired uplink optical signal.
  • the processing unit 2002 is further configured to generate a fluorescent signal according to the received uplink optical signal
  • the processing unit 2002 is further configured to perform photoelectric changes on the fluorescent signal to obtain the first uplink electrical signal.
  • the processing unit 2002 is further configured to perform modulation and cancellation on the first uplink electrical signal according to the downlink electrical signal to obtain a second uplink electrical signal.
  • the processing unit 2002 is further configured to calculate a target delay, where the target delay is a delay between inputting the downlink electrical signal and generating the first uplink electrical signal;
  • the processing unit 2002 is further configured to reconstruct the first uplink electrical signal according to the target delay.
  • the transceiver unit 2001 is further configured to send a positioning signal to the first optical wireless device, and the positioning signal is used to determine the relationship between the second optical wireless device and the first optical wireless device. Distance information between wireless devices;
  • the processing unit 2002 is further configured to determine parameters for performing modulation and cancellation on the uplink optical signal according to the distance information.
  • the transceiver unit 2001 is further configured to send a communication request to the first optical wireless device
  • the transceiving unit 2001 is further configured to receive a response message corresponding to the communication request.
  • the processing unit 2002 is further configured to, if the calibration condition is met, or, if the calibration request sent by the first optical wireless device is received, update the Uplink optical signal modulation cancellation parameters; wherein, the calibration conditions include one or more of the following: the distance change between the second optical wireless device and the first optical wireless device, the first downlink The transmission rate of the optical signal or the uplink optical signal decreases, and the bit error rate increases.
  • each unit in the device shown in FIG. 20 can be separately or all combined into one or several other units to form, or one (some) units can be split into more functional units. It is composed of multiple small units, which can achieve the same operation without affecting the realization of the technical effects of the embodiments of the present application.
  • the above-mentioned units are divided based on logical functions. In practical applications, the functions of one unit may also be realized by multiple units, or the functions of multiple units may be realized by one unit. In other embodiments of the present application, the network-based device may also include other units. In practical applications, these functions may also be assisted by other units, and may be implemented cooperatively by multiple units.
  • optical signal processing is performed on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal and the second downlink optical signal are the first downlink optical signal
  • the optical signal is divided into two optical signals, the uplink optical signal is used to reflect back to the second optical wireless device, and the second downlink optical signal is used to receive and perform photoelectric change processing to obtain the first downlink electrical signal, thereby realizing uplink and downlink communication functions .
  • FIG. 21 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 210 shown in FIG. 21 is only an example, and the communication device in the embodiment of the present application may also include other components, or include components with functions similar to those in FIG. 21 , or not include the components in FIG. 21 all parts.
  • the communication device 210 includes a communication interface 2101 and at least one processor 2102 .
  • the communication apparatus 210 may correspond to any network element or device in the first optical wireless device or the second optical wireless device.
  • the communication interface 2101 is used to send and receive signals, and at least one processor 2102 executes program instructions, so that the communication device 210 implements the corresponding process of the method performed by the corresponding network element in the above method embodiment.
  • the communication device 210 may correspond to the first optical wireless device in the method embodiments shown in FIGS. It is the chip in the First Optical wireless device.
  • the communication device 210 may include components for performing the operations performed by the first optical wireless device in the above method embodiments, and each component in the communication device 210 is to implement the operations performed by the first optical wireless device in the above method embodiments, respectively.
  • the action performed by the device can be as follows:
  • the first optical wireless device performs optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal; wherein the uplink optical signal and the second downlink optical signal are the first downlink optical signal
  • the optical signal is divided into two optical signals, and the uplink optical signal is used for reflection back to the second optical wireless device;
  • the first optical wireless device obtains a first downlink electrical signal according to the acquired second downlink optical signal.
  • the method also includes:
  • the obtaining the first downlink electrical signal according to the acquired second downlink optical signal includes:
  • the photoelectric change of the fluorescent signal to obtain the first downlink electrical signal includes:
  • the method also includes:
  • the first downlink electrical signal is modulated and eliminated according to the uplink electrical signal to obtain a second downlink electrical signal.
  • the performing modulation and cancellation on the first downlink electrical signal according to the uplink electrical signal includes:
  • the target time delay is a time delay between inputting the uplink electrical signal and generating the first downlink electrical signal
  • the method before performing optical signal processing on the first downlink optical signal, the method further includes:
  • the two-optical wireless device determines parameters for performing modulation and cancellation on the uplink optical signal.
  • the method also includes:
  • a response message is sent to the second optical wireless device in response to the communication request.
  • the method also includes:
  • a calibration request is sent to the second optical wireless device; wherein the calibration request is used to request the second optical wireless device to update parameters for performing modulation and cancellation on the uplink optical signal, so
  • the calibration conditions include one or more of the following: the distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or the uplink optical signal decreases , The bit error rate increases.
  • the communication device 210 may correspond to the second optical wireless device in the method embodiments shown in FIGS. It may be a chip in the second optical wireless device.
  • the communication device 210 may include components for performing the operations performed by the second optical wireless device in the above method embodiments, and each component in the communication device 210 is to implement the operations performed by the second optical wireless device in the above method embodiments, respectively.
  • the action performed by the device can be as follows:
  • the second optical wireless device transmits a first downlink optical signal to the first optical wireless device; wherein, the first downlink optical signal is divided into an uplink optical signal and a second downlink optical signal after optical signal processing, and the uplink optical signal for reflection back to said second optical wireless device;
  • the second optical wireless device obtains the first uplink electrical signal according to the acquired uplink optical signal.
  • the obtaining the first uplink electrical signal according to the acquired uplink optical signal includes:
  • the method also includes:
  • the first uplink electrical signal is modulated and eliminated according to the downlink electrical signal to obtain a second uplink electrical signal.
  • the performing modulation and cancellation on the first uplink electrical signal according to the downlink electrical signal includes:
  • the target time delay is the time delay between inputting the downlink electrical signal and generating the first uplink electrical signal
  • the method before transmitting the first downlink optical signal to the first optical wireless device, the method further includes:
  • parameters for performing modulation and elimination on the uplink optical signal are determined.
  • the method also includes:
  • a response message corresponding to the communication request is received.
  • the method also includes:
  • the calibration condition includes the following one One or more items: the distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or the uplink optical signal decreases, and the bit error rate increases .
  • optical signal processing is performed on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal and the second downlink optical signal are the first downlink optical signal
  • the optical signal is divided into two optical signals, the uplink optical signal is used to reflect back to the second optical wireless device, and the second downlink optical signal is used to receive and perform photoelectric change processing to obtain the first downlink electrical signal, thereby realizing uplink and downlink communication functions .
  • the communication device may be a chip or a chip system
  • the communication device may be a chip or a chip system
  • the chip 220 includes a processor 2201 and an interface 2202 .
  • the number of processors 2201 may be one or more, and the number of interfaces 2202 may be more than one.
  • the respective functions of the processor 2201 and the interface 2202 can be realized by hardware design, software design, or a combination of software and hardware, which is not limited here.
  • the chip 220 may also include a memory 2203 for storing necessary program instructions and data.
  • the processor 2201 can be used to call from the memory 2203 the implementation of one or more devices or network elements in the first optical wireless device or the second optical wireless device in the communication method provided by one or more embodiments of the present application program, and executes the instructions contained in that program.
  • the interface 2202 can be used to output the execution result of the processor 2201 .
  • the interface 2202 may be specifically used to output various messages or information of the processor 2201 .
  • the processor in the embodiment of the present application may be a central processing unit (Central Processing Unit, CPU), and the processor may also be other general processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the memory in the embodiment of the present application is used to provide a storage space, and data such as an operating system and a computer program may be stored in the storage space.
  • Memory includes but not limited to random access memory (random access memory, RAM), read-only memory (read-only memory, ROM), erasable programmable read-only memory (erasable programmable read only memory, EPROM), or portable Read-only memory (compact disc read-only memory, CD-ROM).
  • the embodiment of the present application also provides a computer-readable storage medium, where a computer program is stored in the above-mentioned computer-readable storage medium, and when the above-mentioned computer program is run on one or more processors, The above methods shown in FIGS. 14 to 19 can be implemented.
  • the present application also provides a computer program product, the computer program product including: a computer program, when the computer program is run on the computer, the above methods shown in Figure 14 to Figure 19 can be implemented .
  • the embodiment of the present application also provides a communication system, which includes at least one communication device 200 or communication device 210 or chip 220 as described above, and is used to execute the corresponding network elements in any of the embodiments in Fig. 14 to Fig. 19 step.
  • the embodiment of the present application also provides a processing device, including a processor and an interface; the processor is configured to execute the method in any one of the above method embodiments.
  • the above processing device may be a chip.
  • the processing device may be a field programmable gate array (field programmable gate array, FPGA), a general processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC) , off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, system on chip (SoC), or central processing It can also be a central processor unit (CPU), a network processor (network processor, NP), a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (micro controller unit, MCU) , and can also be a programmable logic device (programmable logic device, PLD) or other integrated chips.
  • CPU central processor unit
  • NP network processor
  • NP digital signal processing circuit
  • microcontroller micro controller unit, MCU
  • programmable logic device programmable logic device
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (RAM), which acts as external cache memory.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM direct memory bus random access memory
  • direct rambus RAM direct rambus RAM
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disc, SSD)) etc.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a high-density digital video disc (digital video disc, DVD)
  • a semiconductor medium for example, a solid state disk (solid state disc, SSD)
  • the first optical wireless device and the second optical wireless device in the above-mentioned various apparatus embodiments correspond completely to the first optical wireless device and the second optical wireless device in the method embodiments, and corresponding steps are performed by corresponding modules or units, for example
  • the communication unit (transceiver) performs the steps of receiving or sending in the method embodiments, and other steps except sending and receiving may be performed by the processing unit (processor).
  • the processing unit (processor)
  • references to "an embodiment” throughout this specification mean that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments throughout the specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.
  • a corresponds to B means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.
  • the above is an example of the three elements of A, B and C to illustrate the optional items of the project.
  • the expression includes at least one of the following: A, B, ..., and X"
  • the applicable entries for this item can also be obtained according to the aforementioned rules.
  • the first optical wireless device and the second optical wireless device may perform some or all of the steps in the embodiment of the present application, these steps or operations are only examples, and the embodiment of the present application may also perform other Operations or variants of operations.
  • each step may be performed in a different order presented in the embodiment of the present application, and it may not be necessary to perform all operations in the embodiment of the present application.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory ROM, random access memory RAM, magnetic disk or optical disk, and other media capable of storing program codes.

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Abstract

The present application relates to the technical field of optical communications. Disclosed are an optical wireless device, a communication method, and a communication system. The optical wireless device comprises a first processing unit and a first transceiving unit, wherein the first processing unit is used for performing optical signal processing on a first downlink optical signal, so as to obtain an uplink optical signal and a second downlink optical signal; the uplink optical signal is used for being reflected back to a second optical wireless device; and the first transceiving unit is used for acquiring the second downlink optical signal and sending a first downlink electrical signal. By means of the optical wireless device, the communication method and the communication system, uplink and downlink communication functions can be realized by using one set of optical structures; in addition, the complexity of the optical wireless device can be reduced, and the integration level of the optical wireless device can be improved.

Description

光无线设备、通信方法及通信系统Optical wireless device, communication method and communication system
本申请要求于2021年12月30日提交中国专利局、申请号为2021116577678、申请名称为“光无线设备、通信方法及通信系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application with application number 2021116577678 and application title "optical wireless device, communication method and communication system" filed with China Patent Office on December 30, 2021, the entire contents of which are incorporated herein by reference Applying.
技术领域technical field
本申请涉及光通信技术领域，尤其涉及一种光无线设备、通信方法及通信系统。The present application relates to the technical field of optical communication, and in particular to an optical wireless device, a communication method and a communication system.
背景技术Background technique
光无线通信技术是无线通信技术中的重要领域之一。当前，高速光无线通信系统广泛应用于单用户点对点、软输入软输出(Soft-Input Soft-Output，SISO)等多种通信场景中。为适应于形式多样的通信场景，满足高速光无线通信的需求，需要在保证通信速率的同时，对光无线终端提出小型化、高集成度的要求。Optical wireless communication technology is one of the important fields in wireless communication technology. At present, high-speed optical wireless communication systems are widely used in various communication scenarios such as single-user point-to-point, soft-input soft-output (Soft-Input Soft-Output, SISO). In order to adapt to various communication scenarios and meet the requirements of high-speed optical wireless communication, it is necessary to put forward requirements for miniaturization and high integration of optical wireless terminals while ensuring the communication rate.
目前，光无线终端在上行通信时，通常采用角反射镜将基站发出的光信号逆向反射至基站，而现有基于角反射镜的光学系统不具备下行通信功能。因此，在下行通信时，需要配置额外的接收透镜及波束调整结构用于下行光信号接收，导致无法兼顾光无线终端小型化、高集成度的需求与上行、下行通信功能的需求。At present, when an optical wireless terminal communicates uplink, it usually uses a corner reflector to retroreflect the optical signal sent by the base station to the base station, but the existing optical system based on the corner reflector does not have the function of downlink communication. Therefore, during downlink communication, additional receiving lenses and beam adjustment structures need to be configured for downlink optical signal reception, resulting in the inability to balance the requirements of miniaturization and high integration of optical wireless terminals with the requirements of uplink and downlink communication functions.
发明内容Contents of the invention
本申请实施例提供了一种光无线设备、通信方法及通信系统，可以利用一套光学结构实现上行及下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。Embodiments of the present application provide an optical wireless device, a communication method, and a communication system, which can use a set of optical structures to implement uplink and downlink communication functions, reduce the complexity of the optical wireless device, and improve the integration of the optical wireless device.
第一方面，本申请实施例提供了一种光无线设备，该光无线设备包括：In a first aspect, an embodiment of the present application provides an optical wireless device, and the optical wireless device includes:
第一处理单元和第一收发单元；a first processing unit and a first transceiver unit;
所述第一处理单元，用于对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号；其中，所述上行光信号和所述第二下行光信号为所述第一下行光信号分成的两路光信号，所述上行光信号用于反射回第二光无线设备；The first processing unit is configured to perform optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal; wherein the uplink optical signal and the second downlink optical signal are the The first downlink optical signal is divided into two optical signals, and the uplink optical signal is used for reflection back to the second optical wireless device;
所述第一收发单元，用于获取所述第二下行光信号，发送第一下行电信号。The first transceiver unit is configured to acquire the second downlink optical signal and send a first downlink electrical signal.
本申请实施例中，提供了一种光无线设备的可能的实施方式，具体为，光无线设备包括第一处理单元和第一收发单元。其中，光无线设备中的第一处理单元用于对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号。可以理解为，第一下行光信号经过光信号处理后分成了上行光信号和第二下行光信号的至少两路光信号，其中，上行光信号用于反射回第二光无线设备，该第二光无线设备具体可以是发送上述第一下行光信号的设备，第二下行光信号用于本实施例中的光无线设备(本实施例中的光无线设备也可称为第一光无线设备，用于区别第二光无线设备)自己接收。具体为光无线设备中的第一收发单元用于接收上述第二下行光信号，并对第二下行光信号执行光电变化处理，发送第一下行电信号。通过本申请实施例，可以利用包括但不限于第一处理单元和第一收发单元的一套光学结构，同时实现光无线设备上行及下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。In this embodiment of the present application, a possible implementation manner of an optical wireless device is provided, specifically, the optical wireless device includes a first processing unit and a first transceiver unit. Wherein, the first processing unit in the optical wireless device is configured to perform optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal. It can be understood that, after optical signal processing, the first downlink optical signal is divided into at least two optical signals of an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal is used for reflection back to the second optical wireless device, and the first The second optical wireless device may specifically be a device that sends the above-mentioned first downlink optical signal, and the second downlink optical signal is used for the optical wireless device in this embodiment (the optical wireless device in this embodiment may also be referred to as the first optical wireless device, used to distinguish the second optical wireless device) from receiving by itself. Specifically, the first transceiver unit in the optical wireless device is configured to receive the second downlink optical signal, perform photoelectric change processing on the second downlink optical signal, and send the first downlink electrical signal. Through the embodiment of the present application, a set of optical structures including but not limited to the first processing unit and the first transceiver unit can be used to realize the uplink and downlink communication functions of the optical wireless device at the same time, and can reduce the complexity of the optical wireless device and improve the optical efficiency. Integration of wireless devices.
在一种可能的实施方式中，所述第一处理单元包括：In a possible implementation manner, the first processing unit includes:
至少一个半透射镜；at least one semi-transmissive mirror;
所述第一下行光信号经过所述至少一个半透射镜后，分成反射光信号和所述第二下行光信号。After passing through the at least one semi-transparent mirror, the first downlink optical signal is divided into a reflected optical signal and the second downlink optical signal.
在本申请实施例中，提供了一种第一处理单元的可能的具体实施方式，具体为，第一处理单元包括至少一个半透射镜。利用半透射镜的透射和反射原理，使得第一下行光信号经过该至少一个半透射镜后，分成反射光信号和第二下行光信号。其中，第二下行光信号用于本实施例中的光无线设备自己接收，反射光信号用于反射回第二光无线设备，具体的，该反射光信号需经过调制处理得到上述上行光信号，再将该上行光信号反射回第二光无线设备，该第二光无线设备具体可以是发送上述第一下行光信号的设备。通过本申请实施例，可以利用半透射镜的透射和反射原理，将接收到的第一下行光信号分成反射光信号和第二下行光信号，第二下行光信号用于实现下行通信功能，反射光信号用于实现上行通信功能，从而可以同时实现光无线设备上行及下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。In the embodiment of the present application, a possible specific implementation manner of the first processing unit is provided, specifically, the first processing unit includes at least one semi-transmissive mirror. The principle of transmission and reflection of the semi-transmissive mirror is used, so that the first downlink optical signal is divided into a reflected optical signal and a second downlink optical signal after passing through the at least one semi-transparent mirror. Wherein, the second downlink optical signal is used for receiving by the optical wireless device in this embodiment, and the reflected optical signal is used for reflection back to the second optical wireless device. Specifically, the reflected optical signal needs to be modulated to obtain the above-mentioned uplink optical signal. The uplink optical signal is then reflected back to the second optical wireless device, and the second optical wireless device may specifically be a device for sending the above-mentioned first downlink optical signal. Through the embodiment of the present application, the received first downlink optical signal can be divided into a reflected optical signal and a second downlink optical signal by using the principle of transmission and reflection of a semi-transparent mirror, and the second downlink optical signal is used to realize the downlink communication function. The reflected optical signal is used to realize the uplink communication function, so that the uplink and downlink communication functions of the optical wireless device can be realized simultaneously, and the complexity of the optical wireless device can be reduced, and the integration degree of the optical wireless device can be improved.
在一种可能的实施方式中，所述第一处理单元还包括：In a possible implementation manner, the first processing unit further includes:
至少一个透镜；at least one lens;
所述第一下行光信号经过所述至少一个透镜的入射角和所述上行光信号经过所述至少一个透镜的出射角相同。An incident angle of the first downlink optical signal passing through the at least one lens is the same as an outgoing angle of the uplink optical signal passing through the at least one lens.
在本申请实施例中，提供了另一种第一处理单元的可能的具体实施方式，具体为，第一处理单元包括至少一个半透射镜之外，还可以包括至少一个透镜。利用透镜的透射原理，使得上述第一下行光信号经过该至少一个透镜的入射角和上述上行光信号经过该至少一个透镜的出射角相同，从而入射光(第一下行光信号)和出射光(上行光信号)形成一个完整的光通信回路，可以同时实现光无线设备上行及下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。In the embodiment of the present application, another possible specific implementation manner of the first processing unit is provided. Specifically, the first processing unit may include at least one lens in addition to at least one semi-transmissive mirror. Using the transmission principle of the lens, the incident angle of the above-mentioned first downlink optical signal passing through the at least one lens is the same as the exit angle of the above-mentioned uplink optical signal passing through the at least one lens, so that the incident light (first downlink optical signal) and the outgoing light The emitted light (uplink optical signal) forms a complete optical communication circuit, which can realize the uplink and downlink communication functions of optical wireless equipment at the same time, and can reduce the complexity of optical wireless equipment and improve the integration of optical wireless equipment.
在一种可能的实施方式中，所述第一处理单元还包括：In a possible implementation manner, the first processing unit further includes:
至少一个全反射透镜；at least one total reflection lens;
所述第一下行光信号经过所述至少一个全反射透镜的入射角和所述上行光信号经过所述至少一个全反射透镜的出射角相同。An incident angle of the first downlink optical signal passing through the at least one total reflection lens is the same as an outgoing angle of the uplink optical signal passing through the at least one total reflection lens.
在本申请实施例中，提供了另一种第一处理单元的可能的具体实施方式，具体为，第一处理单元包括至少一个半透射镜之外，还可以包括至少一个全反射透镜。利用全反射透镜的反射原理，使得上述第一下行光信号经过该至少一个全反射透镜的入射角和上述上行光信号经过该至少一个全反射透镜的出射角相同，从而入射光(第一下行光信号)和出射光(上行光信号)形成一个完整的光通信回路，可以同时实现光无线设备上行及下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。In the embodiment of the present application, another possible specific implementation manner of the first processing unit is provided. Specifically, the first processing unit may include at least one total reflection lens in addition to at least one semi-transmissive mirror. Using the reflection principle of the total reflection lens, the incident angle of the above-mentioned first downlink optical signal passing through the at least one total reflection lens is the same as the exit angle of the above-mentioned uplink optical signal passing through the at least one total reflection lens, so that the incident light (the first downlink optical signal) Uplink optical signal) and outgoing light (uplink optical signal) form a complete optical communication circuit, which can realize the uplink and downlink communication functions of optical wireless equipment at the same time, and can reduce the complexity of optical wireless equipment and improve the integration of optical wireless equipment.
在一种可能的实施方式中，所述第一处理单元还包括：In a possible implementation manner, the first processing unit further includes:
光调制器；light modulator;
所述光调制器，用于对光信号进行强度调制或相位调制。The optical modulator is used to perform intensity modulation or phase modulation on the optical signal.
在本申请实施例中，提供了又一种第一处理单元的可能的具体实施方式，具体为，第一处理单元包括至少一个半透射镜之外，还可以包括光调制器。该光调制器用于对光信号进行强度调制或相位调制，具体的，在入射光(第一下行光信号)经过光调制器时，光调制器根据接收到的上行电信号对该第一下行光信号进行光强度调制或相位调制等调制处理。其次，被调制后的第一下行光信号经过至少一个半透射镜，分成反射光信号和第二下行光信号，在 反射光信号反射回第二光无线设备的过程中再次经过光调制器，光调制器根据接收到的上行电信号对该反射光信号进行光强度调制或相位调制等调制处理，得到上行光信号，该上行光信号再反射回第二光无线设备。通过本申请实施例，可以利用光调制器对入射光和出射光进行光强度调制或相位调制等调制处理，使得经过调制后的第二下行光信号有效承载下行数据，经过调制后的上行光信号有效承载上行数据，从而可以同时实现光无线设备上行及下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。In the embodiment of the present application, another possible specific implementation manner of the first processing unit is provided, specifically, the first processing unit may further include a light modulator in addition to at least one semi-transmissive mirror. The optical modulator is used to perform intensity modulation or phase modulation on the optical signal. Specifically, when the incident light (first downlink optical signal) passes through the optical modulator, the optical modulator performs the first downlink optical signal according to the received uplink electrical signal. The optical signal is subjected to modulation processing such as light intensity modulation or phase modulation. Secondly, the modulated first downlink optical signal passes through at least one semi-transmissive mirror, is divided into a reflected optical signal and a second downlink optical signal, and passes through the optical modulator again in the process of reflecting the reflected optical signal back to the second optical wireless device, The optical modulator performs modulation processing such as light intensity modulation or phase modulation on the reflected optical signal according to the received uplink electrical signal to obtain an uplink optical signal, and the uplink optical signal is reflected back to the second optical wireless device. Through the embodiment of the present application, the optical modulator can be used to perform modulation processing such as light intensity modulation or phase modulation on the incident light and the outgoing light, so that the modulated second downlink optical signal effectively carries downlink data, and the modulated uplink optical signal The uplink data is effectively carried, so that the uplink and downlink communication functions of the optical wireless device can be realized simultaneously, the complexity of the optical wireless device can be reduced, and the integration degree of the optical wireless device can be improved.
在一种可能的实施方式中，所述第一收发单元包括：In a possible implementation manner, the first transceiver unit includes:
荧光收集器和光电探测器；Fluorescence collectors and photodetectors;
所述荧光收集器，用于接收所述第二下行光信号，生成荧光信号；The fluorescence collector is configured to receive the second downlink optical signal and generate a fluorescence signal;
所述光电探测器，用于对所述荧光信号进行光电变化，得到电信号。The photodetector is used to photoelectrically change the fluorescent signal to obtain an electrical signal.
在本申请实施例中，提供了一种第一收发单元的可能的具体实施方式，具体为，第一收发单元包括荧光收集器和光电探测器。其中，荧光收集器用于收集第二下行光信号，激发荧光效应生成荧光信号，并将荧光信号传输至光电探测器。此处利用荧光天线对光信号入射方向不敏感、可实现大面积收光等特性，可以较好的适配大面积半透射镜，实现多种入射方向的第二下行光信号的高效率接收。光电探测器用于对接收到的荧光信号进行光电变化，得到电信号，该电信号可以作为上述第一下行电信号输出。通过本申请实施例，可以利用荧光收集器和光电探测器组合而成的第一收发单元，实现多种入射方向的第二下行光信号的高效率接收，并转换为第一下行电信号，从而实现下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。In the embodiment of the present application, a possible specific implementation manner of the first transceiver unit is provided, specifically, the first transceiver unit includes a fluorescence collector and a photodetector. Wherein, the fluorescence collector is used to collect the second downlink light signal, excite the fluorescence effect to generate the fluorescence signal, and transmit the fluorescence signal to the photodetector. Here, the fluorescent antenna is not sensitive to the incident direction of the optical signal and can realize large-area light collection. It can be better adapted to a large-area semi-transmissive mirror to achieve high-efficiency reception of the second downlink optical signal in various incident directions. The photodetector is used to photoelectrically change the received fluorescent signal to obtain an electrical signal, which can be output as the above-mentioned first downlink electrical signal. Through the embodiment of the present application, the first transceiver unit composed of the fluorescence collector and the photodetector can be used to realize high-efficiency reception of the second downlink optical signal in various incident directions and convert it into the first downlink electrical signal, Therefore, the downlink communication function is realized, and the complexity of the optical wireless equipment can be reduced, and the integration degree of the optical wireless equipment can be improved.
在一种可能的实施方式中，所述第一收发单元还包括：In a possible implementation manner, the first transceiver unit further includes:
合路器；Combiner;
所述光电探测器对多个荧光信号进行光电变化后输出多个电信号；The photodetector outputs a plurality of electrical signals after photoelectrically changing the plurality of fluorescent signals;
所述合路器，用于将所述多个电信号合并，输出所述第一下行电信号。The combiner is configured to combine the multiple electrical signals to output the first downlink electrical signal.
在本申请实施例中，提供了另一种第一收发单元的可能的具体实施方式，具体为，第一收发单元包括荧光收集器和光电探测器之外，第一收发单元还可以包括合路器。在第一收发单元包括多个荧光收集器时，每个荧光收集器都会接收其对应的半透射镜透射过来的第二下行光信号，生成多个荧光信号。相应的，光电探测器对多个荧光信号进行光电变化后输出多个电信号。此时，合路器用于将该多个电信号合并，得到第一下行电信号。通过本申请实施例，可以利用合路器对多个电信号合并为一个电信号，实现第二下行光信号的高效率接收及光电变换，提高光无线设备的下行通信效率。In the embodiment of the present application, another possible specific implementation of the first transceiver unit is provided, specifically, the first transceiver unit includes a fluorescence collector and a photodetector, and the first transceiver unit may also include a combiner device. When the first transceiver unit includes multiple fluorescence collectors, each fluorescence collector receives the second downlink light signal transmitted by its corresponding semi-transparent mirror, and generates multiple fluorescence signals. Correspondingly, the photodetector outputs a plurality of electrical signals after photoelectrically changing the plurality of fluorescent signals. At this time, the combiner is used to combine the multiple electrical signals to obtain the first downlink electrical signal. Through the embodiment of the present application, a combiner can be used to combine multiple electrical signals into one electrical signal, so as to realize high-efficiency reception and photoelectric conversion of the second downlink optical signal, and improve the downlink communication efficiency of the optical wireless device.
在一种可能的实施方式中，所述光无线设备还包括：In a possible implementation manner, the optical wireless device further includes:
调制消除单元；Modulation cancellation unit;
所述调制消除单元，用于根据接收到的上行电信号对所述第一下行电信号进行调制消除，得到第二下行电信号。The modulation and elimination unit is configured to perform modulation and elimination on the first downlink electrical signal according to the received uplink electrical signal to obtain a second downlink electrical signal.
在本申请实施例中，提供了另一种光无线设备的可能的具体实施方式，具体为，光无线设备包括第一处理单元和第一收发单元之外，光无线设备还包括调制消除单元。由于在第一下行光信号经过光信号处理得到第二下行光信号的过程中，会经过光调制器，此时光调制器根据接收到的上行电信号对该第一下行光信号进行光强度调制或相位调制等调制处理，导致上行电信号引起的调制会叠加至第一下行光信号，形成同时具备下行数据和上行数据的第二下行光信号，该效应称为二次调制。相应的，由第二下行光信号进行光电变换得到的第一下行电信号也存在二次调制。光无线设备中的调制消除单元用于根据已知的上行电信号对第一 下行电信号进行调制消除，即抵消第一下行电信号中存在的二次调制，得到第二下行电信号。通过本申请实施例，利用调制消除单元对第一下行电信号进行调制消除，抵消第一下行电信号中因上行电信号引起的二次调制，可以实现光无线设备上下行通信同时工作。In this embodiment of the present application, another possible specific implementation manner of an optical wireless device is provided, specifically, the optical wireless device includes a modulation canceling unit in addition to the first processing unit and the first transceiver unit. Since the first downlink optical signal passes through the optical modulator during the process of obtaining the second downlink optical signal through optical signal processing, at this time the optical modulator measures the light intensity of the first downlink optical signal according to the received uplink electrical signal. Modulation processing such as modulation or phase modulation causes the modulation caused by the uplink electrical signal to be superimposed on the first downlink optical signal to form a second downlink optical signal with both downlink data and uplink data. This effect is called secondary modulation. Correspondingly, the first downlink electrical signal obtained through the photoelectric conversion of the second downlink optical signal also has secondary modulation. The modulation elimination unit in the optical wireless device is used to perform modulation elimination on the first downlink electrical signal according to the known uplink electrical signal, that is, cancel the secondary modulation existing in the first downlink electrical signal, and obtain the second downlink electrical signal. Through the embodiment of the present application, the modulation and elimination unit is used to perform modulation and cancellation on the first downlink electrical signal to cancel the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal, so that the uplink and downlink communication of the optical wireless device can work simultaneously.
在一种可能的实施方式中，所述调制消除单元包括：In a possible implementation manner, the modulation elimination unit includes:
时延计算单元和信号重构单元；Delay calculation unit and signal reconstruction unit;
所述时延计算单元，用于计算目标时延，所述目标时延为输入所述上行电信号到生成所述第一下行电信号之间的时延；The delay calculation unit is configured to calculate a target delay, where the target delay is the delay between inputting the uplink electrical signal and generating the first downlink electrical signal;
所述信号重构单元，用于根据所述目标时延对所述第一下行电信号进行重构。The signal reconstruction unit is configured to reconstruct the first downlink electrical signal according to the target time delay.
在本申请实施例中，提供了一种调制消除单元的可能的具体实施例，具体为，调制消除单元包括时延计算单元和信号重构单元。其中，时延计算单元用于计算输入上行电信号到生成第一下行电信号之间的时延，记作目标时延。信号重构单元用于根据目标时延对第一下行电信号进行重构，抵消第一下行电信号中存在的时延，之后再对第一下行电信号进行调制消除。通过本申请实施例，利用时延计算单元和信号重构单元抵消第一下行电信号中存在的时延，可以实现光无线设备上下行通信同时工作。In this embodiment of the present application, a possible specific embodiment of the modulation elimination unit is provided, specifically, the modulation elimination unit includes a delay calculation unit and a signal reconstruction unit. Wherein, the time delay calculation unit is used to calculate the time delay between inputting the uplink electrical signal and generating the first downlink electrical signal, which is recorded as the target time delay. The signal reconstruction unit is used to reconstruct the first downlink electrical signal according to the target time delay, offset the time delay existing in the first downlink electrical signal, and then modulate and eliminate the first downlink electrical signal. Through the embodiment of the present application, the time delay existing in the first downlink electrical signal can be offset by using the time delay calculation unit and the signal reconstruction unit, so that the uplink and downlink communication of the optical wireless device can work simultaneously.
在一种可能的实施方式中，所述时延计算单元包括：In a possible implementation manner, the delay calculation unit includes:
时间数字转换器；time-to-digital converter;
所述时间数字转换器，用于计算所述目标时延。The time-to-digital converter is used to calculate the target time delay.
在本申请实施例中，提供了一种时延计算单元的可能的具体实施例，具体为，时延计算单元包括时间数字转换器。该时间数字转换器可以用于计算输入上行电信号到生成第一下行电信号之间的目标时延，输出高精度的目标时延的参数。In this embodiment of the present application, a possible specific embodiment of the delay calculation unit is provided, specifically, the delay calculation unit includes a time-to-digital converter. The time-to-digital converter can be used to calculate the target time delay between the input of the uplink electrical signal and the generation of the first downlink electrical signal, and output high-precision parameters of the target time delay.
在一种可能的实施方式中，所述信号重构单元包括：In a possible implementation manner, the signal reconstruction unit includes:
延时器；delayer;
所述延时器，用于根据所述目标时延对所述第一下行电信号进行重构。The delayer is configured to reconstruct the first downlink electrical signal according to the target time delay.
在本申请实施例中，提供了一种信号重构单元的可能的具体实施例，具体为，信号重构单元包括延时器。该延时器可以用于根据目标时延对第一下行电信号进行重构，抵消第一下行电信号中存在的时延，实现高效的下行通信。In the embodiment of the present application, a possible specific embodiment of the signal reconstruction unit is provided, specifically, the signal reconstruction unit includes a delayer. The delayer can be used to reconstruct the first downlink electrical signal according to the target time delay, offset the time delay existing in the first downlink electrical signal, and realize efficient downlink communication.
在一种可能的实施方式中，所述信号重构单元还包括：In a possible implementation manner, the signal reconstruction unit further includes:
可调衰减器；adjustable attenuator;
所述可调衰减器，用于调节所述第一下行电信号的信号幅度。The adjustable attenuator is used to adjust the signal amplitude of the first downlink electrical signal.
在本申请实施例中，提供了另一种信号重构单元的可能的具体实施例，具体为，信号重构单元包括延时器之外，信号重构单元还包括可调衰减器。该可调衰减器可以用于调节第一下行电信号的信号幅度，实现高效的下行通信。In the embodiment of the present application, another possible specific embodiment of the signal reconstruction unit is provided, specifically, the signal reconstruction unit includes an adjustable attenuator in addition to the delayer. The adjustable attenuator can be used to adjust the signal amplitude of the first downlink electrical signal to realize efficient downlink communication.
在一种可能的实施方式中，所述调制消除单元还包括：In a possible implementation manner, the modulation elimination unit further includes:
除法器；divider;
所述除法器，用于根据接收到的所述上行电信号对所述第一下行电信号进行调制消除，得到所述第二下行电信号。The divider is configured to modulate and eliminate the first downlink electrical signal according to the received uplink electrical signal to obtain the second downlink electrical signal.
在本申请实施例中，提供了另一种调制消除单元的可能的具体实施例，具体为，调制消除单元包括时延计算单元和信号重构单元之外，调制消除单元还包括除法器。该除法器用于根据已知的上行电信号对第一下行电信号进行调制消除，即抵消第一下行电信号中存在的二次调制，得到第二下行电信号。通过本申请实施例，利用除法器对第一下行电信号进行调制消除，抵消第一下行电信号中因上行电信号引起的二次调制，可以实现光无线设备上下行通 信同时工作。In this embodiment of the present application, another possible specific embodiment of the modulation elimination unit is provided, specifically, the modulation elimination unit includes a delay calculation unit and a signal reconstruction unit, and the modulation elimination unit further includes a divider. The divider is used to perform modulation and elimination on the first downlink electrical signal according to the known uplink electrical signal, that is, cancel the secondary modulation existing in the first downlink electrical signal, and obtain the second downlink electrical signal. Through the embodiment of the present application, the first downlink electrical signal is modulated and eliminated by the divider, and the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal is canceled out, so that the uplink and downlink communication of the optical wireless device can work simultaneously.
在一种可能的实施方式中，所述光无线设备还包括：In a possible implementation manner, the optical wireless device further includes:
第二处理单元；second processing unit;
所述第二处理单元用于执行以下至少一项：The second processing unit is configured to perform at least one of the following:
发送上行电信号，所述上行电信号用于对所述第一下行光信号进行信号调制，或者用于对所述第一下行电信号进行调制消除；sending an uplink electrical signal, where the uplink electrical signal is used for signal modulation of the first downlink optical signal, or for modulation and cancellation of the first downlink electrical signal;
或者，接收第二下行电信号，所述第二下行电信号为所述第一下行电信号经过调制消除后的电信号。Or, receiving a second downlink electrical signal, where the second downlink electrical signal is an electrical signal after modulation and cancellation of the first downlink electrical signal.
在本申请实施例中，提供了又一种光无线设备的可能的具体实施方式，具体为，光无线设备包括第一处理单元和第一收发单元之外，光无线设备还包括第二处理单元。该第二处理单元可以作为发射信号处理单元，用于发送上行电信号，该上行电信号传输至第一处理单元中的光调制器，用于对第一下行光信号进行信号调制，该上行电信号还可以传输至调制消除单元，用于对第一下行电信号进行调制消除。或者，该第二处理单元还可以作为接收信号处理单元，用于接收第二下行电信号，该第二下行电信号是第一下行电信号经过调制消除后的电信号。通过本申请实施例，可以发送上行电信号或接收第二下行电信号，实现各个电信号之间的数模/模数转化以及通用的信道编码/均衡，同时实现光无线设备上行及下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。In the embodiment of the present application, another possible specific implementation of the optical wireless device is provided. Specifically, the optical wireless device includes a second processing unit in addition to the first processing unit and the first transceiver unit. . The second processing unit can be used as a transmitting signal processing unit for sending an uplink electrical signal, and the uplink electrical signal is transmitted to the optical modulator in the first processing unit for signal modulation of the first downlink optical signal. The electrical signal can also be transmitted to a modulation elimination unit for performing modulation elimination on the first downlink electrical signal. Alternatively, the second processing unit may also serve as a received signal processing unit, configured to receive a second downlink electrical signal, where the second downlink electrical signal is an electrical signal after modulation and cancellation of the first downlink electrical signal. Through the embodiment of this application, it is possible to send an uplink electrical signal or receive a second downlink electrical signal, realize digital-to-analog/analog-to-digital conversion and general channel coding/equalization between various electrical signals, and simultaneously realize the uplink and downlink communication functions of optical wireless devices , and can reduce the complexity of the optical wireless equipment, and improve the integration degree of the optical wireless equipment.
第二方面，本申请实施例提供了一种光无线设备，该光无线设备包括：In a second aspect, an embodiment of the present application provides an optical wireless device, and the optical wireless device includes:
第三处理单元和第二收发单元；a third processing unit and a second transceiver unit;
所述第三处理单元，用于向第一光无线设备发射第一下行光信号；其中，所述第一下行光信号经过光信号处理后分成上行光信号和第二下行光信号，所述上行光信号用于反射回所述第二收发单元；The third processing unit is configured to transmit a first downlink optical signal to the first optical wireless device; wherein the first downlink optical signal is divided into an uplink optical signal and a second downlink optical signal after optical signal processing, and the The uplink optical signal is used to reflect back to the second transceiver unit;
所述第二收发单元，用于获取所述上行光信号，发送第一上行电信号。The second transceiver unit is configured to acquire the uplink optical signal and send a first uplink electrical signal.
本申请实施例中，提供了一种光无线设备的可能的实施方式，具体为，光无线设备包括第三处理单元和第二收发单元。其中，光无线设备中的第三处理单元用于向第一光无线设备发射第一下行光信号，本实施例中的光无线设备也可称为第二光无线设备，用于区别第一光无线设备。该第一下行光信号经过光信号处理后分成上行光信号和第二下行光信号，其中，上行光信号用于反射回第二光无线设备中的第二收发单元，第二下行光信号用于第一光无线设备自己接收。第二光无线设备中的第二收发单元用于接收反射回的上行光信号，并对上行光信号执行光电变化处理，发送第一上行电信号。通过本申请实施例，可以利用包括但不限于第三处理单元和第二收发单元的一套光学结构，同时实现光无线设备上行及下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。In this embodiment of the present application, a possible implementation manner of an optical wireless device is provided, specifically, the optical wireless device includes a third processing unit and a second transceiver unit. Wherein, the third processing unit in the optical wireless device is used to transmit the first downlink optical signal to the first optical wireless device. The optical wireless device in this embodiment can also be called the second optical wireless device, which is used to distinguish the first Optical wireless devices. After optical signal processing, the first downlink optical signal is divided into an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal is used for reflection back to the second transceiver unit in the second optical wireless device, and the second downlink optical signal is used for Received by the first optical wireless device itself. The second transceiver unit in the second optical wireless device is configured to receive the reflected uplink optical signal, perform photoelectric change processing on the uplink optical signal, and send the first uplink electrical signal. Through the embodiment of the present application, a set of optical structure including but not limited to the third processing unit and the second transceiver unit can be used to realize the uplink and downlink communication functions of the optical wireless device at the same time, and can reduce the complexity of the optical wireless device and improve the optical efficiency. Integration of wireless devices.
在一种可能的实施方式中，所述第二收发单元包括：In a possible implementation manner, the second transceiver unit includes:
荧光收集器和光电探测器；Fluorescence collectors and photodetectors;
所述荧光收集器，用于接收所述上行光信号，生成荧光信号；The fluorescence collector is used to receive the upstream light signal and generate a fluorescence signal;
所述光电探测器，用于对所述荧光信号进行光电变化，得到所述第一上行电信号。The photodetector is used to photoelectrically change the fluorescent signal to obtain the first uplink electrical signal.
在本申请实施例中，提供了一种第二收发单元的可能的具体实施方式，具体为，第二收发单元包括荧光收集器和光电探测器。其中，荧光收集器用于收集上行光信号，激发荧光效应生成荧光信号，并将荧光信号传输至光电探测器。此处利用荧光天线对光信号入射方向不敏感、可实现大面积收光等特性，可以较好的适配大面积半透射镜，实现多种入射方向的上 行光信号的高效率接收。光电探测器用于对接收到的荧光信号进行光电变化，得到第一上行电信号。通过本申请实施例，可以利用荧光收集器和光电探测器组合而成的第二收发单元，实现多种入射方向的上行光信号的高效率接收，并转换为第一上行电信号，从而实现上行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。In the embodiment of the present application, a possible specific implementation manner of the second transceiver unit is provided, specifically, the second transceiver unit includes a fluorescence collector and a photodetector. Wherein, the fluorescence collector is used to collect the upstream light signal, excite the fluorescence effect to generate the fluorescence signal, and transmit the fluorescence signal to the photodetector. Here, the fluorescent antenna is not sensitive to the incident direction of the optical signal, and can realize large-area light collection. It can be better adapted to a large-area semi-transmissive mirror to achieve high-efficiency reception of uplink optical signals in various incident directions. The photodetector is used to photoelectrically change the received fluorescent signal to obtain the first uplink electrical signal. Through the embodiment of the present application, the second transceiver unit composed of the fluorescence collector and the photodetector can be used to realize high-efficiency reception of uplink optical signals in various incident directions and convert them into first uplink electrical signals, thereby realizing uplink optical signals. Communication function, and can reduce the complexity of optical wireless equipment, improve the integration of optical wireless equipment.
在一种可能的实施方式中，所述光无线设备还包括：In a possible implementation manner, the optical wireless device further includes:
调制消除单元；Modulation cancellation unit;
所述调制消除单元，用于根据接收到的下行电信号对所述第一上行电信号进行调制消除，得到第二上行电信号。The modulation and elimination unit is configured to perform modulation and elimination on the first uplink electrical signal according to the received downlink electrical signal to obtain a second uplink electrical signal.
在本申请实施例中，提供了另一种光无线设备的可能的具体实施方式，具体为，光无线设备包括第三处理单元和第二收发单元之外，光无线设备还包括调制消除单元。由于第一下行光信号在发射之前，会根据接收到的下行电信号对该第一下行光信号进行光强度调制或相位调制等调制处理，导致下行电信号引起的调制会叠加至第一下行光信号，形成同时具备下行数据和上行数据的上行光信号，该效应称为二次调制。相应的，由上行光信号进行光电变换得到的第一上行电信号也存在二次调制。光无线设备中的调制消除单元用于根据已知的下行电信号对第一上行电信号进行调制消除，即抵消第一上行电信号中存在的二次调制，得到第二上行电信号。通过本申请实施例，利用调制消除单元对第一上行电信号进行调制消除，抵消第一上行电信号中因下行电信号引起的二次调制，可以实现光无线设备上下行通信同时工作。In this embodiment of the present application, another possible specific implementation manner of an optical wireless device is provided, specifically, the optical wireless device includes a modulation canceling unit in addition to the third processing unit and the second transceiver unit. Before the first downlink optical signal is transmitted, the first downlink optical signal will be subjected to modulation processing such as light intensity modulation or phase modulation according to the received downlink electrical signal, so that the modulation caused by the downlink electrical signal will be superimposed on the first downlink optical signal. The downlink optical signal forms an uplink optical signal with both downlink data and uplink data. This effect is called secondary modulation. Correspondingly, the first uplink electrical signal obtained through photoelectric conversion of the uplink optical signal also has secondary modulation. The modulation cancellation unit in the optical wireless device is used to perform modulation cancellation on the first uplink electrical signal according to the known downlink electrical signal, that is, cancel the secondary modulation existing in the first uplink electrical signal, and obtain the second uplink electrical signal. Through the embodiment of the present application, the modulation and elimination unit is used to perform modulation and elimination on the first uplink electrical signal to cancel the secondary modulation caused by the downlink electrical signal in the first uplink electrical signal, so that the uplink and downlink communication of the optical wireless device can work simultaneously.
在一种可能的实施方式中，所述调制消除单元包括：In a possible implementation manner, the modulation elimination unit includes:
时延计算单元和信号重构单元；Delay calculation unit and signal reconstruction unit;
所述时延计算单元，用于计算目标时延，所述目标时延为输入所述下行电信号到生成所述第一上行电信号之间的时延；The time delay calculation unit is configured to calculate a target time delay, where the target time delay is the time delay between inputting the downlink electrical signal and generating the first uplink electrical signal;
所述信号重构单元，用于根据所述目标时延对所述第一上行电信号进行重构。The signal reconstruction unit is configured to reconstruct the first uplink electrical signal according to the target time delay.
在本申请实施例中，提供了一种调制消除单元的可能的具体实施例，具体为，调制消除单元包括时延计算单元和信号重构单元。其中，时延计算单元用于计算输入下行电信号到生成第一上行电信号之间的时延，记作目标时延。信号重构单元用于根据目标时延对第一上行电信号进行重构，抵消第一上行电信号中存在的时延，之后再对第一上行电信号进行调制消除。通过本申请实施例，利用时延计算单元和信号重构单元抵消第一上行电信号中存在的时延，可以实现光无线设备上下行通信同时工作。In the embodiment of the present application, a possible specific embodiment of the modulation elimination unit is provided, specifically, the modulation elimination unit includes a delay calculation unit and a signal reconstruction unit. Wherein, the time delay calculation unit is used to calculate the time delay between the input of the downlink electrical signal and the generation of the first uplink electrical signal, which is recorded as the target time delay. The signal reconstruction unit is used to reconstruct the first uplink electrical signal according to the target time delay, offset the time delay existing in the first uplink electrical signal, and then modulate and eliminate the first uplink electrical signal. Through the embodiment of the present application, the time delay existing in the first uplink electrical signal can be offset by using the time delay calculation unit and the signal reconstruction unit, so that the uplink and downlink communication of the optical wireless device can work simultaneously.
在一种可能的实施方式中，所述时延计算单元包括：In a possible implementation manner, the delay calculation unit includes:
时间数字转换器；time-to-digital converter;
所述时间数字转换器，用于计算所述目标时延。The time-to-digital converter is used to calculate the target time delay.
在本申请实施例中，提供了一种时延计算单元的可能的具体实施例，具体为，时延计算单元包括时间数字转换器。该时间数字转换器可以用于计算输入下行电信号到生成第一上行电信号之间的目标时延，输出高精度的目标时延的参数。In this embodiment of the present application, a possible specific embodiment of the delay calculation unit is provided, specifically, the delay calculation unit includes a time-to-digital converter. The time-to-digital converter can be used to calculate the target time delay between the input of the downlink electrical signal and the generation of the first uplink electrical signal, and output high-precision parameters of the target time delay.
在一种可能的实施方式中，所述信号重构单元包括：In a possible implementation manner, the signal reconstruction unit includes:
延时器；delayer;
所述延时器，用于根据所述目标时延对所述第一上行电信号进行重构。The delayer is configured to reconstruct the first uplink electrical signal according to the target time delay.
在本申请实施例中，提供了一种信号重构单元的可能的具体实施例，具体为，信号重构单元包括延时器。该延时器可以用于根据目标时延对第一上行电信号进行重构，抵消第一上行电信号中存在的时延，实现高效的上行通信。In the embodiment of the present application, a possible specific embodiment of the signal reconstruction unit is provided, specifically, the signal reconstruction unit includes a delayer. The delayer can be used to reconstruct the first uplink electrical signal according to the target time delay, offset the time delay existing in the first uplink electrical signal, and realize efficient uplink communication.
在一种可能的实施方式中，所述信号重构单元还包括：In a possible implementation manner, the signal reconstruction unit further includes:
可调衰减器；adjustable attenuator;
所述可调衰减器，用于调节所述第一上行电信号的信号幅度。The adjustable attenuator is used to adjust the signal amplitude of the first uplink electrical signal.
在本申请实施例中，提供了另一种信号重构单元的可能的具体实施例，具体为，信号重构单元包括延时器之外，信号重构单元还包括可调衰减器。该可调衰减器可以用于调节第一上行电信号的信号幅度，实现高效的上行通信。In the embodiment of the present application, another possible specific embodiment of the signal reconstruction unit is provided, specifically, the signal reconstruction unit includes an adjustable attenuator in addition to the delayer. The adjustable attenuator can be used to adjust the signal amplitude of the first uplink electrical signal to realize efficient uplink communication.
在一种可能的实施方式中，所述调制消除单元还包括：In a possible implementation manner, the modulation elimination unit further includes:
除法器；divider;
所述除法器，用于根据接收到的所述下行电信号对所述第一上行电信号进行调制消除，得到所述第二上行电信号。The divider is configured to modulate and eliminate the first uplink electrical signal according to the received downlink electrical signal to obtain the second uplink electrical signal.
在本申请实施例中，提供了另一种调制消除单元的可能的具体实施例，具体为，调制消除单元包括时延计算单元和信号重构单元之外，调制消除单元还包括除法器。该除法器用于根据已知的下行电信号对第一上行电信号进行调制消除，即抵消第一上行电信号中存在的二次调制，得到第二上行电信号。通过本申请实施例，利用除法器对第一上行电信号进行调制消除，抵消第一上行电信号中因下行电信号引起的二次调制，可以实现光无线设备上下行通信同时工作。In this embodiment of the present application, another possible specific embodiment of the modulation elimination unit is provided, specifically, the modulation elimination unit includes a delay calculation unit and a signal reconstruction unit, and the modulation elimination unit further includes a divider. The divider is used to perform modulation and elimination on the first uplink electrical signal according to the known downlink electrical signal, that is, cancel the secondary modulation existing in the first uplink electrical signal, and obtain the second uplink electrical signal. Through the embodiment of the present application, the first uplink electrical signal is modulated and eliminated by using the divider, and the secondary modulation caused by the downlink electrical signal in the first uplink electrical signal is canceled out, so that the uplink and downlink communication of the optical wireless device can work simultaneously.
在一种可能的实施方式中，所述光无线设备还包括：In a possible implementation manner, the optical wireless device further includes:
第四处理单元；the fourth processing unit;
所述第四处理单元用于执行以下至少一项：The fourth processing unit is configured to perform at least one of the following:
发送下行电信号，所述下行电信号用于对光信号进行信号调制，或者用于对所述第一上行电信号进行调制消除；sending a downlink electrical signal, where the downlink electrical signal is used for signal modulation of an optical signal, or for modulation and cancellation of the first uplink electrical signal;
或者，接收第二上行电信号，所述第二上行电信号为所述第一上行电信号经过调制消除后的电信号。Or, receiving a second uplink electrical signal, where the second uplink electrical signal is an electrical signal after modulation and cancellation of the first uplink electrical signal.
在本申请实施例中，提供了又一种光无线设备的可能的具体实施方式，具体为，光无线设备包括第三处理单元和第二收发单元之外，光无线设备还包括第四处理单元。该第四处理单元可以作为发射信号处理单元，用于发送下行电信号，该下行电信号传输至第三处理单元，用于对第一下行光信号进行信号调制，该下行电信号还可以传输至调制消除单元，用于对第一上行电信号进行调制消除。或者，该第四处理单元还可以作为接收信号处理单元，用于接收第二上行电信号，该第二上行电信号是第一上行电信号经过调制消除后的电信号。通过本申请实施例，可以发送下行电信号或接收第二上行电信号，实现各个电信号之间的数模/模数转化以及通用的信道编码/均衡，同时实现光无线设备上行及下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。In the embodiment of the present application, another possible specific implementation of the optical wireless device is provided, specifically, the optical wireless device includes a fourth processing unit in addition to the third processing unit and the second transceiver unit . The fourth processing unit can be used as a transmission signal processing unit for sending a downlink electrical signal, and the downlink electrical signal is transmitted to a third processing unit for signal modulation of the first downlink optical signal, and the downlink electrical signal can also be transmitted to a modulation and elimination unit, configured to perform modulation and elimination on the first uplink electrical signal. Alternatively, the fourth processing unit may also serve as a received signal processing unit, configured to receive a second uplink electrical signal, where the second uplink electrical signal is an electrical signal after modulation and cancellation of the first uplink electrical signal. Through the embodiment of the present application, it is possible to send a downlink electrical signal or receive a second uplink electrical signal, realize digital-to-analog/analog-to-digital conversion and general channel coding/equalization between various electrical signals, and realize the uplink and downlink communication functions of optical wireless devices at the same time , and can reduce the complexity of the optical wireless equipment, and improve the integration degree of the optical wireless equipment.
第三方面，本申请实施例提供了一种通信方法，该通信方法包括：In a third aspect, the embodiment of the present application provides a communication method, the communication method includes:
第一光无线设备对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号；其中，所述上行光信号和所述第二下行光信号为所述第一下行光信号分成的两路光信号，所述上行光信号用于反射回第二光无线设备；The first optical wireless device performs optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal; wherein the uplink optical signal and the second downlink optical signal are the first downlink optical signal The optical signal is divided into two optical signals, and the uplink optical signal is used for reflection back to the second optical wireless device;
所述第一光无线设备根据获取的所述第二下行光信号，得到第一下行电信号。The first optical wireless device obtains a first downlink electrical signal according to the acquired second downlink optical signal.
本申请实施例中，提供了一种通信方法的可能的实施方式，应用于第一光无线设备。具体为，第一光无线设备对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号。可以理解为，第一下行光信号经过光信号处理后分成了上行光信号和第二下行光信号的 至少两路光信号，其中，上行光信号用于反射回第二光无线设备，该第二光无线设备具体可以是发送上述第一下行光信号的设备，第二下行光信号由本实施例中的第一光无线设备自己接收。并且第一光无线设备对第二下行光信号执行光电变化处理，得到第一下行电信号。通过本申请实施例，可以同时实现第一光无线设备上行及下行通信功能，且能降低第一光无线设备的复杂度，提高第一光无线设备的集成度。In this embodiment of the present application, a possible implementation manner of a communication method is provided, which is applied to a first optical wireless device. Specifically, the first optical wireless device performs optical signal processing on the first downlink optical signal to obtain the uplink optical signal and the second downlink optical signal. It can be understood that, after optical signal processing, the first downlink optical signal is divided into at least two optical signals of an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal is used for reflection back to the second optical wireless device, and the first The second optical wireless device may specifically be a device that sends the above-mentioned first downlink optical signal, and the second downlink optical signal is received by the first optical wireless device in this embodiment itself. And the first optical wireless device performs photoelectric change processing on the second downlink optical signal to obtain the first downlink electrical signal. Through the embodiment of the present application, the uplink and downlink communication functions of the first optical wireless device can be realized simultaneously, the complexity of the first optical wireless device can be reduced, and the integration degree of the first optical wireless device can be improved.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
对光信号进行强度调制或相位调制。Intensity or phase modulation of optical signals.
在本申请实施例中，还提供了一种对光信号进行调制的可能的具体实施方式。具体为，根据上行电信号对第一下行光信号进行光强度调制或相位调制等调制处理。其次，被调制后的第一下行光信号经过光信号处理后，分成反射光信号和第二下行光信号，再根据上行电信号对该反射光信号进行光强度调制或相位调制等调制处理，得到上行光信号，该上行光信号再反射回第二光无线设备。通过本申请实施例，可以对光信号进行强度调制或相位调制等调制处理，使得经过调制后的第二下行光信号有效承载下行数据，经过调制后的上行光信号有效承载上行数据，从而可以同时实现第一光无线设备上行及下行通信功能，且能降低第一光无线设备的复杂度，提高第一光无线设备的集成度。In the embodiment of the present application, a possible specific implementation manner of modulating an optical signal is also provided. Specifically, modulation processing such as optical intensity modulation or phase modulation is performed on the first downlink optical signal according to the uplink electrical signal. Secondly, after optical signal processing, the modulated first downlink optical signal is divided into a reflected optical signal and a second downlink optical signal, and then the reflected optical signal is subjected to modulation processing such as light intensity modulation or phase modulation according to the uplink electrical signal, An uplink optical signal is obtained, and the uplink optical signal is reflected back to the second optical wireless device. Through the embodiment of the present application, modulation processing such as intensity modulation or phase modulation can be performed on the optical signal, so that the modulated second downlink optical signal can effectively carry the downlink data, and the modulated uplink optical signal can effectively carry the uplink data, thereby simultaneously The uplink and downlink communication functions of the first optical wireless device are realized, the complexity of the first optical wireless device can be reduced, and the integration degree of the first optical wireless device can be improved.
在一种可能的实施方式中，所述根据获取的所述第二下行光信号，得到第一下行电信号，包括：In a possible implementation manner, the obtaining the first downlink electrical signal according to the obtained second downlink optical signal includes:
根据所述第二下行光信号，生成荧光信号；generating a fluorescent signal according to the second downlink optical signal;
对所述荧光信号进行光电变化，得到所述第一下行电信号。performing a photoelectric change on the fluorescent signal to obtain the first downlink electrical signal.
在本申请实施例中，提供了一种根据获取的所述第二下行光信号得到第一下行电信号的可能的具体实施方式。具体为，根据接收到的第二下行光信号生成荧光信号，再对荧光信号进行光电变化，得到第一下行电信号。通过本申请实施例，可以利用荧光效应，实现多种入射方向的第二下行光信号的高效率接收，并转换为第一下行电信号，从而实现下行通信功能，且能降低第一光无线设备的复杂度，提高第一光无线设备的集成度。In the embodiment of the present application, a possible specific implementation manner of obtaining the first downlink electrical signal according to the obtained second downlink optical signal is provided. Specifically, a fluorescent signal is generated according to the received second downlink optical signal, and then a photoelectric change is performed on the fluorescent signal to obtain a first downlink electrical signal. Through the embodiment of the present application, the fluorescence effect can be used to realize the efficient reception of the second downlink optical signal in various incident directions and convert it into the first downlink electrical signal, so as to realize the downlink communication function and reduce the first optical wireless signal. The complexity of the equipment improves the integration of the first optical wireless equipment.
在一种可能的实施方式中，所述对所述荧光信号进行光电变化，得到所述第一下行电信号，包括：In a possible implementation manner, the photoelectric change of the fluorescent signal to obtain the first downlink electrical signal includes:
对多个荧光信号进行光电变化后得到多个电信号；After performing photoelectric changes on multiple fluorescent signals, multiple electrical signals are obtained;
将所述多个电信号合并，得到所述第一下行电信号。combining the multiple electrical signals to obtain the first downlink electrical signal.
在本申请实施例中，提供了一种对荧光信号进行光电变化的可能的具体实施方式。具体为，在根据接收到的第二下行光信号生成多个荧光信号的情况下，对多个荧光信号进行光电变化，得到多个电信号，再将多个电信号合并，得到第一下行电信号。通过本申请实施例，可以对多个电信号合并为一个电信号，实现第二下行光信号的高效率接收及光电变换，提高第一光无线设备的下行通信效率。In the embodiment of the present application, a possible specific implementation manner of photoelectrically changing the fluorescent signal is provided. Specifically, in the case of generating a plurality of fluorescent signals based on the received second downlink optical signal, photoelectrically change the plurality of fluorescent signals to obtain a plurality of electrical signals, and then combine the plurality of electrical signals to obtain the first downlink optical signal. electric signal. Through the embodiment of the present application, multiple electrical signals can be combined into one electrical signal to realize high-efficiency reception and photoelectric conversion of the second downlink optical signal, and improve the downlink communication efficiency of the first optical wireless device.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
根据上行电信号对所述第一下行电信号进行调制消除，得到第二下行电信号。The first downlink electrical signal is modulated and eliminated according to the uplink electrical signal to obtain a second downlink electrical signal.
在本申请实施例中，还提供了一种对第一下行电信号进行调制消除的可能的具体实施方式。具体为，由于在第一下行光信号经过光信号处理得到第二下行光信号的过程中，会根据上行电信号对该第一下行光信号进行光强度调制或相位调制等调制处理，导致上行电信号引起的调制会叠加至第一下行光信号，形成同时具备下行数据和上行数据的第二下行光信号，该效应称为二次调制。相应的，由第二下行光信号进行光电变换得到的第一下行电信号也存在二次调制。此时，将根据已知的上行电信号对第一下行电信号进行调制消除，即抵消第一 下行电信号中存在的二次调制，得到第二下行电信号。通过本申请实施例，对第一下行电信号进行调制消除，抵消第一下行电信号中因上行电信号引起的二次调制，可以实现第一光无线设备上下行通信同时工作。In the embodiment of the present application, a possible specific implementation manner of performing modulation and cancellation on the first downlink electrical signal is also provided. Specifically, since the first downlink optical signal undergoes optical signal processing to obtain the second downlink optical signal, the first downlink optical signal will be subjected to modulation processing such as optical intensity modulation or phase modulation according to the uplink electrical signal, resulting in The modulation caused by the uplink electrical signal will be superimposed on the first downlink optical signal to form a second downlink optical signal with both downlink data and uplink data. This effect is called secondary modulation. Correspondingly, the first downlink electrical signal obtained through the photoelectric conversion of the second downlink optical signal also has secondary modulation. At this time, the first downlink electrical signal is modulated and eliminated according to the known uplink electrical signal, that is, the secondary modulation existing in the first downlink electrical signal is canceled to obtain the second downlink electrical signal. Through the embodiment of the present application, the first downlink electrical signal is modulated and eliminated, and the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal is canceled out, so that the first optical wireless device can work simultaneously in uplink and downlink communication.
在一种可能的实施方式中，所述根据上行电信号对所述第一下行电信号进行调制消除，包括：In a possible implementation manner, the performing modulation and cancellation on the first downlink electrical signal according to the uplink electrical signal includes:
计算目标时延，所述目标时延为输入所述上行电信号到生成所述第一下行电信号之间的时延；calculating a target time delay, where the target time delay is a time delay between inputting the uplink electrical signal and generating the first downlink electrical signal;
根据所述目标时延对所述第一下行电信号进行重构。Reconstructing the first downlink electrical signal according to the target time delay.
在本申请实施例中，提供了另一种对第一下行电信号进行调制消除的可能的具体实施方式。具体为，计算输入上行电信号到生成第一下行电信号之间的时延，记作目标时延。然后根据目标时延对第一下行电信号进行重构，抵消第一下行电信号中存在的时延，之后再对第一下行电信号进行调制消除。通过本申请实施例，抵消第一下行电信号中存在的时延，可以实现第一光无线设备上下行通信同时工作。In the embodiment of the present application, another possible specific implementation manner of performing modulation and cancellation on the first downlink electrical signal is provided. Specifically, the time delay between the input of the uplink electrical signal and the generation of the first downlink electrical signal is calculated and recorded as the target time delay. Then, the first downlink electrical signal is reconstructed according to the target time delay to offset the time delay existing in the first downlink electrical signal, and then the first downlink electrical signal is modulated and eliminated. Through the embodiment of the present application, the time delay existing in the first downlink electrical signal can be offset, so that the uplink and downlink communication of the first optical wireless device can work simultaneously.
在一种可能的实施方式中，所述对第一下行光信号执行光信号处理之前，所述方法还包括：In a possible implementation manner, before performing optical signal processing on the first downlink optical signal, the method further includes:
接收所述第二光无线设备发送的定位信号，所述定位信号用于确定所述第二光无线设备与所述第一光无线设备之间的距离信息，所述距离信息用于所述第二光无线设备确定对所述上行光信号进行调制消除的参数。receiving a positioning signal sent by the second optical wireless device, where the positioning signal is used to determine distance information between the second optical wireless device and the first optical wireless device, and the distance information is used for the first optical wireless device The two-optical wireless device determines parameters for performing modulation and cancellation on the uplink optical signal.
在本申请实施例中，还提供了一种接收定位信号的可能的具体实施方式。具体为，在对第一下行光信号执行光信号处理之前，第一光无线设备还接收第二光无线设备发送的定位信号，该定位信号用于确定第二光无线设备与第一光无线设备之间的距离信息，该距离信息用于第二光无线设备确定对上行光信号进行调制消除的参数。通过本申请实施例，可以利用定位信号确定第一光无线设备与第二光无线设备之间的距离信息，从而确定第二光无线设备对上行光信号进行调制消除的参数，实现上下行通信同时工作。In the embodiment of the present application, a possible specific implementation manner of receiving a positioning signal is also provided. Specifically, before performing optical signal processing on the first downlink optical signal, the first optical wireless device also receives a positioning signal sent by the second optical wireless device, and the positioning signal is used to determine the relationship between the second optical wireless device and the first optical wireless device. Distance information between devices, where the distance information is used by the second optical wireless device to determine parameters for performing modulation and cancellation on the uplink optical signal. Through the embodiment of this application, the positioning signal can be used to determine the distance information between the first optical wireless device and the second optical wireless device, so as to determine the parameters for the second optical wireless device to modulate and eliminate the uplink optical signal, and realize simultaneous uplink and downlink communication. Work.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
接收所述第二光无线设备发送的通信请求；receiving a communication request sent by the second optical wireless device;
确定对所述第一下行电信号进行调制消除的参数；determining parameters for performing modulation and cancellation on the first downlink electrical signal;
响应于所述通信请求，向所述第二光无线设备发送应答消息。A response message is sent to the second optical wireless device in response to the communication request.
在本申请实施例中，还提供了一种确定对第一下行电信号进行调制消除的参数的可能的具体实施方式。具体为，第一光无线设备接收第二光无线设备发送的通信请求后，响应于该通信请求，向第二光无线设备发送应答消息，同时确定第一光无线设备对第一下行电信号进行调制消除的参数，打开收发功能，准备与第二光无线设备进行数据传输。通过本申请实施例，可以确定第一光无线设备对第一下行电信号进行调制消除的参数，从而实现上下行通信同时工作。In the embodiment of the present application, a possible specific implementation manner of determining parameters for performing modulation and cancellation on the first downlink electrical signal is also provided. Specifically, after receiving the communication request sent by the second optical wireless device, the first optical wireless device sends a response message to the second optical wireless device in response to the communication request, and at the same time determines that the first optical wireless device has a response to the first downlink electrical signal Perform modulation and elimination parameters, turn on the transceiver function, and prepare for data transmission with the second optical wireless device. Through the embodiment of the present application, it is possible to determine the parameters for the first optical wireless device to modulate and eliminate the first downlink electrical signal, so as to realize simultaneous operation of uplink and downlink communications.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
在满足校准条件的情况下，向所述第二光无线设备发送校准请求；其中，所述校准请求用于请求所述第二光无线设备更新对所述上行光信号进行调制消除的参数，所述校准条件包括以下一项或多项：所述第二光无线设备与所述第一光无线设备之间的距离变化、所述第一下行光信号或所述上行光信号的传输速率降低、误码率升高。When the calibration condition is met, a calibration request is sent to the second optical wireless device; wherein the calibration request is used to request the second optical wireless device to update parameters for performing modulation and cancellation on the uplink optical signal, so The calibration conditions include one or more of the following: the distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or the uplink optical signal decreases , The bit error rate increases.
在本申请实施例中，还提供了一种校准机制的可能的具体实施方式。具体为，在检测到满足校准条件的情况下，第一光无线设备向第二光无线设备发送校准请求，用于请求第二光 无线设备更新对上行光信号进行调制消除的参数。其中，校准条件包括但不限于：第二光无线设备与第一光无线设备之间的距离发送变化，第一下行光信号或上行光信号的传输速率降低，误码率升高等。通过本申请实施例，可以请求第二光无线设备及时更新对上行光信号进行调制消除的参数，从而实现上下行通信同时工作，提高上下行通信效率。In the embodiment of the present application, a possible specific implementation manner of a calibration mechanism is also provided. Specifically, when it is detected that the calibration condition is met, the first optical wireless device sends a calibration request to the second optical wireless device, which is used to request the second optical wireless device to update parameters for performing modulation cancellation on the uplink optical signal. Wherein, the calibration conditions include but are not limited to: the transmission distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or uplink optical signal decreases, and the bit error rate increases. Through the embodiment of the present application, the second optical wireless device can be requested to update the parameters for modulating and eliminating the uplink optical signal in time, so as to realize the simultaneous operation of uplink and downlink communication and improve the efficiency of uplink and downlink communication.
关于第三方面以及任一项可能的实施方式所带来的技术效果，还可参考对应于第一方面以及相应的实施方式的技术效果的介绍。Regarding the technical effect brought by the third aspect and any possible implementation manner, reference may also be made to the introduction corresponding to the technical effect of the first aspect and the corresponding implementation manner.
第四方面，本申请实施例提供了一种通信方法，该通信方法包括：In a fourth aspect, the embodiment of the present application provides a communication method, the communication method includes:
第二光无线设备向第一光无线设备发射第一下行光信号；其中，所述第一下行光信号经过光信号处理后分成上行光信号和第二下行光信号，所述上行光信号用于反射回所述第二光无线设备；The second optical wireless device transmits a first downlink optical signal to the first optical wireless device; wherein, the first downlink optical signal is divided into an uplink optical signal and a second downlink optical signal after optical signal processing, and the uplink optical signal for reflection back to said second optical wireless device;
所述第二光无线设备根据获取的所述上行光信号，得到第一上行电信号。The second optical wireless device obtains the first uplink electrical signal according to the acquired uplink optical signal.
本申请实施例中，提供了一种通信方法的可能的实施方式，应用于第二光无线设备。具体为，第二光无线设备向第一光无线设备发送第一下行光信号，该第一下行光信号经过光信号处理后得到上行光信号和第二下行光信号。可以理解为，第一下行光信号经过光信号处理后分成了上行光信号和第二下行光信号的至少两路光信号，其中，上行光信号用于反射回第二光无线设备，第二下行光信号由第一光无线设备接收。第二光无线设备接收反射回的上行光信号，并对该上行光信号执行光电变化处理，得到第一上行电信号。通过本申请实施例，可以同时实现第二光无线设备上行及下行通信功能，且能降低第二光无线设备的复杂度，提高第二光无线设备的集成度。In this embodiment of the present application, a possible implementation manner of a communication method is provided, which is applied to the second optical wireless device. Specifically, the second optical wireless device sends a first downlink optical signal to the first optical wireless device, and the first downlink optical signal is processed to obtain an uplink optical signal and a second downlink optical signal. It can be understood that, after optical signal processing, the first downlink optical signal is divided into at least two optical signals of an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal is used for reflection back to the second optical wireless device, and the second The downlink optical signal is received by the first optical wireless device. The second optical wireless device receives the reflected uplink optical signal, and performs photoelectric change processing on the uplink optical signal to obtain the first uplink electrical signal. Through the embodiment of the present application, the uplink and downlink communication functions of the second optical wireless device can be realized simultaneously, the complexity of the second optical wireless device can be reduced, and the integration degree of the second optical wireless device can be improved.
在一种可能的实施方式中，所述根据获取的所述上行光信号，得到第一上行电信号，包括：In a possible implementation manner, the obtaining the first uplink electrical signal according to the acquired uplink optical signal includes:
根据接收到的所述上行光信号，生成荧光信号；generating a fluorescent signal according to the received uplink optical signal;
对所述荧光信号进行光电变化，得到所述第一上行电信号。performing a photoelectric change on the fluorescent signal to obtain the first uplink electrical signal.
本申请实施例中，提供了一种根据获取的上行光信号得到第一上行电信号的可能的具体实施方式。具体为，根据接收到的上行光信号生成荧光信号，再对荧光信号进行光电变化，得到第一上行电信号。通过本申请实施例，可以利用荧光效应，实现多种入射方向的上行光信号的高效率接收，并转换为第一上行电信号，从而实现上行通信功能，且能降低第二光无线设备的复杂度，提高第二光无线设备的集成度。In the embodiment of the present application, a possible specific implementation manner of obtaining the first uplink electrical signal according to the acquired uplink optical signal is provided. Specifically, a fluorescence signal is generated according to the received uplink optical signal, and then a photoelectric change is performed on the fluorescence signal to obtain a first uplink electrical signal. Through the embodiment of the present application, the fluorescent effect can be used to realize high-efficiency reception of uplink optical signals in various incident directions, and convert them into first uplink electrical signals, thereby realizing the uplink communication function and reducing the complexity of the second optical wireless device The degree of integration of the second optical wireless device is improved.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
根据下行电信号对所述第一上行电信号进行调制消除，得到第二上行电信号。The first uplink electrical signal is modulated and eliminated according to the downlink electrical signal to obtain a second uplink electrical signal.
本申请实施例中，还提供了一种对第一上行电信号进行调制消除的可能的具体实施方式。具体为，由于第一下行光信号在发射之前，会根据接收到的下行电信号对该第一下行光信号进行光强度调制或相位调制等调制处理，导致下行电信号引起的调制会叠加至第一下行光信号，形成同时具备下行数据和上行数据的上行光信号，该效应称为二次调制。相应的，由上行光信号进行光电变换得到的第一上行电信号也存在二次调制。此时，将根据已知的下行电信号对第一上行电信号进行调制消除，即抵消第一上行电信号中存在的二次调制，得到第二下行电信号。通过本申请实施例，对第一上行电信号进行调制消除，抵消第一上行电信号中因下行电信号引起的二次调制，可以实现第二光无线设备上下行通信同时工作。In the embodiment of the present application, a possible specific implementation manner of performing modulation and cancellation on the first uplink electrical signal is also provided. Specifically, before the first downlink optical signal is transmitted, modulation processing such as optical intensity modulation or phase modulation will be performed on the first downlink optical signal according to the received downlink electrical signal, so that the modulation caused by the downlink electrical signal will be superimposed to the first downlink optical signal to form an uplink optical signal with both downlink data and uplink data. This effect is called secondary modulation. Correspondingly, the first uplink electrical signal obtained through photoelectric conversion of the uplink optical signal also has secondary modulation. At this time, the first uplink electrical signal is modulated and eliminated according to the known downlink electrical signal, that is, the secondary modulation existing in the first uplink electrical signal is canceled to obtain the second downlink electrical signal. Through the embodiment of the present application, the first uplink electrical signal is modulated and eliminated, and the secondary modulation caused by the downlink electrical signal in the first uplink electrical signal is canceled out, so that the second optical wireless device can work simultaneously for uplink and downlink communication.
在一种可能的实施方式中，所述根据下行电信号对所述第一上行电信号进行调制消除，包括：In a possible implementation manner, the performing modulation and cancellation on the first uplink electrical signal according to the downlink electrical signal includes:
计算目标时延，所述目标时延为输入所述下行电信号到生成所述第一上行电信号之间的时延；calculating a target time delay, where the target time delay is the time delay between inputting the downlink electrical signal and generating the first uplink electrical signal;
根据所述目标时延对所述第一上行电信号进行重构。Reconstructing the first uplink electrical signal according to the target time delay.
本申请实施例中，提供了另一种对第一上行电信号进行调制消除的可能的具体实施方式。具体为，计算输入下行电信号到生成第一上行电信号之间的时延，记作目标时延。然后根据目标时延对第一上行电信号进行重构，抵消第一上行电信号中存在的时延，之后再对第一上行电信号进行调制消除。通过本申请实施例，抵消第一上行电信号中存在的时延，可以实现第二光无线设备上下行通信同时工作。In the embodiment of the present application, another possible specific implementation manner of performing modulation and cancellation on the first uplink electrical signal is provided. Specifically, the time delay between the input of the downlink electrical signal and the generation of the first uplink electrical signal is calculated, and recorded as the target time delay. Then, the first uplink electrical signal is reconstructed according to the target time delay to offset the time delay existing in the first uplink electrical signal, and then the first uplink electrical signal is modulated and eliminated. Through the embodiment of the present application, the time delay existing in the first uplink electrical signal can be offset, so that the uplink and downlink communication of the second optical wireless device can work simultaneously.
在一种可能的实施方式中，所述向第一光无线设备发射第一下行光信号之前，所述方法还包括：In a possible implementation manner, before transmitting the first downlink optical signal to the first optical wireless device, the method further includes:
向所述第一光无线设备发送定位信号，所述定位信号用于确定所述第二光无线设备与所述第一光无线设备之间的距离信息；sending a positioning signal to the first optical wireless device, where the positioning signal is used to determine distance information between the second optical wireless device and the first optical wireless device;
根据所述距离信息，确定对所述上行光信号进行调制消除的参数。According to the distance information, parameters for performing modulation and elimination on the uplink optical signal are determined.
在本申请实施例中，还提供了一种确定对上行光信号进行调制消除的参数的可能的具体实施方式。具体为，在向第一光无线设备发射第一下行光信号之前，第二光无线设备还向第一光无线设备发送定位信号，该定位信号用于确定第一光无线设备与第二光无线设备之间的距离信息。第二光无线设备根据该距离信息确定对上行光信号进行调制消除的参数。通过本申请实施例，可以利用定位信号确定第一光无线设备与第二光无线设备之间的距离信息，从而确定第二光无线设备对上行光信号进行调制消除的参数，实现上下行通信同时工作。In the embodiment of the present application, a possible specific implementation manner of determining a parameter for performing modulation cancellation on an uplink optical signal is also provided. Specifically, before transmitting the first downlink optical signal to the first optical wireless device, the second optical wireless device also sends a positioning signal to the first optical wireless device, and the positioning signal is used to determine the relationship between the first optical wireless device and the second optical wireless device. Distance information between wireless devices. The second optical wireless device determines parameters for performing modulation and cancellation on the uplink optical signal according to the distance information. Through the embodiment of this application, the positioning signal can be used to determine the distance information between the first optical wireless device and the second optical wireless device, so as to determine the parameters for the second optical wireless device to modulate and eliminate the uplink optical signal, and realize simultaneous uplink and downlink communication. Work.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
向所述第一光无线设备发送通信请求；sending a communication request to the first optical wireless device;
接收所述通信请求对应的应答消息。A response message corresponding to the communication request is received.
在本申请实施例中，还提供了一种向第一光无线设备进行通信请求的可能的具体实施方式。具体为，第二光无线设备在确定了对上行光信号进行调制消除的参数之后，第二光无线设备向第一光无线设备发送通信请求，用于请求与第一光无线设备进行数据传输。第二光无线设备接收到该通信请求对应的应答消息后，打开收发功能，准备与第一光无线设备进行数据传输。此外，第一光无线设备在发送应答消息的同时，还确定对第一下行电信号进行调制消除的参数，并打开收发功能。通过本申请实施例，第二光无线设备可以与第一光无线设备进行数据传输，实现上下行通信同时工作。In the embodiment of the present application, a possible specific implementation manner of performing a communication request to the first optical wireless device is also provided. Specifically, after the second optical wireless device determines parameters for performing modulation cancellation on the uplink optical signal, the second optical wireless device sends a communication request to the first optical wireless device for requesting data transmission with the first optical wireless device. After receiving the response message corresponding to the communication request, the second optical wireless device turns on the sending and receiving function, and prepares to perform data transmission with the first optical wireless device. In addition, while sending the response message, the first optical wireless device also determines parameters for performing modulation and cancellation on the first downlink electrical signal, and turns on the sending and receiving function. Through the embodiment of the present application, the second optical wireless device can perform data transmission with the first optical wireless device, so that uplink and downlink communication can work simultaneously.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
在满足校准条件的情况下，或者，在接收到所述第一光无线设备发送的校准请求的情况下，更新对所述上行光信号进行调制消除的参数；其中，所述校准条件包括以下一项或多项：所述第二光无线设备与所述第一光无线设备之间的距离变化、所述第一下行光信号或所述上行光信号的传输速率降低、误码率升高。When the calibration condition is met, or when the calibration request sent by the first optical wireless device is received, update the parameters for performing modulation cancellation on the uplink optical signal; wherein the calibration condition includes the following one One or more items: the distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or the uplink optical signal decreases, and the bit error rate increases .
在本申请实施例中，还提供了一种校准机制的可能的具体实施方式。具体为，在第二光无线设备检测到满足校准条件的情况下，或者，在接收到第一光无线设备发送的校准请求的情况下，第二光无线设备将停止与第一光无线设备之间的数据传输，更新对上行光信号进行调制消除的参数。其中，校准条件包括但不限于：第二光无线设备与第一光无线设备之间的距离发送变化，第一下行光信号或上行光信号的传输速率降低，误码率升高等。通过本申请实施例，可以及时更新对上行光信号进行调制消除的参数，从而实现上下行通信同时工作，提高上下行通信效率。In the embodiment of the present application, a possible specific implementation manner of a calibration mechanism is also provided. Specifically, when the second optical wireless device detects that the calibration condition is satisfied, or when receiving the calibration request sent by the first optical wireless device, the second optical wireless device will stop communicating with the first optical wireless device. The data transmission between them updates the parameters for modulation and elimination of the uplink optical signal. Wherein, the calibration conditions include but are not limited to: the transmission distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or uplink optical signal decreases, and the bit error rate increases. Through the embodiment of the present application, the parameters for modulating and eliminating the uplink optical signal can be updated in time, so as to realize the simultaneous operation of uplink and downlink communication and improve the efficiency of uplink and downlink communication.
关于第四方面以及任一项可能的实施方式所带来的技术效果，还可参考对应于第二方面以及相应的实施方式的技术效果的介绍。Regarding the technical effect brought by the fourth aspect and any possible implementation manner, reference may also be made to the introduction corresponding to the technical effect of the second aspect and the corresponding implementation manner.
第五方面，本申请实施例提供一种通信装置，所述通信装置包括处理器；所述处理器用于执行所述存储器所存储的计算机执行指令，以使所述通信装置执行如上述第三方面以及任一项可能的实施方式的方法，或第四方面以及任一项可能的实施方式的方法。可选的，所述通信装置还包括收发器，所述收发器，用于接收信号或者发送信号。In the fifth aspect, the embodiment of the present application provides a communication device, the communication device includes a processor; the processor is configured to execute the computer-executed instructions stored in the memory, so that the communication device performs the above-mentioned third aspect And the method of any possible implementation, or the fourth aspect and the method of any possible implementation. Optionally, the communication device further includes a transceiver, configured to receive signals or send signals.
第六方面，本申请实施例提供一种通信装置，所述通信装置包括逻辑电路和通信接口；所述通信接口用于输入信息或输出信息，所述逻辑电路用于通过所述通信接口输入信息或者输出信息，以使所述通信装置执行如上述第三方面以及任一项可能的实施方式的方法，或第四方面以及任一项可能的实施方式的方法。In a sixth aspect, an embodiment of the present application provides a communication device, the communication device includes a logic circuit and a communication interface; the communication interface is used to input information or output information, and the logic circuit is used to input information through the communication interface Or output information, so that the communication device executes the method of the third aspect and any possible implementation manner, or the method of the fourth aspect and any possible implementation manner.
第七方面，本申请实施例提供一种计算机可读存储介质，所述计算机可读存储介质用于存储指令或计算机程序；当所述指令或所述计算机程序被执行时，使得第三方面以及任一项可能的实施方式所述的方法被实现，或第四方面以及任一项可能的实施方式所述的方法被实现。In the seventh aspect, the embodiment of the present application provides a computer-readable storage medium, which is used to store instructions or computer programs; when the instructions or the computer programs are executed, the third aspect and The method described in any possible implementation manner is implemented, or the fourth aspect and the method described in any possible implementation manner are implemented.
第八方面，本申请实施例提供一种计算机程序产品，所述计算机程序产品包括指令或计算机程序；当所述指令或所述计算机程序被执行时，使得第三方面以及任一项可能的实施方式所述的方法被实现，或第四方面以及任一项可能的实施方式所述的方法被实现。In the eighth aspect, the embodiment of the present application provides a computer program product, the computer program product includes instructions or computer programs; when the instructions or the computer programs are executed, the third aspect and any possible implementation The method described in the manner is realized, or the method described in the fourth aspect and any possible implementation manner is realized.
第九方面，本申请实施例提供一种芯片，该芯片包括处理器，所述处理器用于执行指令，当该处理器执行所述指令时，使得该芯片执行如第三方面以及任一项可能的实施方式所述的方法，或第四方面以及任一项可能的实施方式所述的方法。可选的，该芯片还包括通信接口，所述通信接口用于接收信号或发送信号。In the ninth aspect, the embodiment of the present application provides a chip, the chip includes a processor, the processor is used to execute instructions, and when the processor executes the instructions, the chip performs the third aspect and any possible The method described in the embodiment, or the method described in the fourth aspect and any possible embodiment. Optionally, the chip further includes a communication interface, and the communication interface is used for receiving signals or sending signals.
第十方面，本申请实施例提供一种通信系统，所述系统包括至少一个如第一方面所述的光无线设备，或第二方面所述的光无线设备，或第五方面所述的通信装置，或第六方面所述的通信装置，或第九方面所述的芯片。In the tenth aspect, the embodiment of the present application provides a communication system, the system includes at least one optical wireless device as described in the first aspect, or the optical wireless device as described in the second aspect, or the communication system as described in the fifth aspect device, or the communication device described in the sixth aspect, or the chip described in the ninth aspect.
此外，在执行上述第三方面以及任一项可能的实施方式所述的方法，或第四方面以及任一项可能的实施方式所述的方法的过程中，上述方法中有关发送信息和/或接收信息等的过程，可以理解为由处理器输出信息的过程，和/或，处理器接收输入的信息的过程。在输出信息时，处理器可以将信息输出给收发器(或者通信接口、或发送模块)，以便由收发器进行发射。信息在由处理器输出之后，还可能需要进行其他的处理，然后才到达收发器。类似的，处理器接收输入的信息时，收发器(或者通信接口、或发送模块)接收信息，并将其输入处理器。更进一步的，在收发器收到该信息之后，该信息可能需要进行其他的处理，然后才输入处理器。In addition, during the process of executing the method described in the above third aspect and any possible implementation manner, or the method described in the fourth aspect and any possible implementation manner, the above method related to sending information and/or The process of receiving information and the like can be understood as the process of outputting information by the processor, and/or the process of receiving input information by the processor. When outputting information, the processor may output information to a transceiver (or a communication interface, or a sending module) for transmission by the transceiver. After the information is output by the processor, additional processing may be required before reaching the transceiver. Similarly, when the processor receives input information, the transceiver (or communication interface, or sending module) receives the information and inputs it to the processor. Furthermore, after the transceiver receives the information, the information may require other processing before being input to the processor.
基于上述原理，举例来说，前述方法中提及的发送信息可以理解为处理器输出信息。又例如，接收信息可以理解为处理器接收输入的信息。Based on the above principles, for example, the sending information mentioned in the foregoing method can be understood as the processor outputting information. For another example, receiving information may be understood as the processor receiving input information.
可选的，对于处理器所涉及的发射、发送和接收等操作，如果没有特殊说明，或者，如果未与其在相关描述中的实际作用或者内在逻辑相抵触，则均可以更加一般性的理解为处理器输出和接收、输入等操作。Optionally, for operations such as transmitting, sending, and receiving involved in the processor, if there is no special description, or if it does not conflict with its actual function or internal logic in the relevant description, it can be understood more generally as Processor output and receive, input and other operations.
可选的，在执行上述第三方面以及任一项可能的实施方式所述的方法，或第四方面以及任一项可能的实施方式所述的方法的过程中，上述处理器可以是专门用于执行这些方法的处理器，也可以是通过执行存储器中的计算机指令来执行这些方法的处理器，例如通用处理器。 上述存储器可以为非瞬时性(non-transitory)存储器，例如只读存储器(Read Only Memory，ROM)，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请实施例对存储器的类型以及存储器与处理器的设置方式不做限定。Optionally, during the process of executing the method described in the third aspect and any possible implementation manner, or the method described in the fourth aspect and any possible implementation manner, the processor may be dedicated to The processor is adapted to perform these methods, and may also be a processor that performs these methods by executing computer instructions in a memory, such as a general purpose processor. The above-mentioned memory can be a non-transitory (non-transitory) memory, such as a read-only memory (Read Only Memory, ROM), which can be integrated with the processor on the same chip, or can be respectively arranged on different chips. The embodiment does not limit the type of the memory and the arrangement of the memory and the processor.
在一种可能的实施方式中，上述至少一个存储器位于装置之外。In a possible implementation manner, the above at least one memory is located outside the device.
在又一种可能的实施方式中，上述至少一个存储器位于装置之内。In yet another possible implementation manner, the at least one memory is located within the device.
在又一种可能的实施方式之中，上述至少一个存储器的部分存储器位于装置之内，另一部分存储器位于装置之外。In yet another possible implementation manner, part of the memory of the at least one memory is located inside the device, and another part of the memory is located outside the device.
本申请中，处理器和存储器还可能集成于一个器件中，即处理器和存储器还可以被集成在一起。In this application, the processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together.
本申请实施例中，可以利用一套光学结构对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号，其中，上行光信号和第二下行光信号为第一下行光信号分成的两路光信号，上行光信号用于反射回第二光无线设备，第二下行光信号用于接收并执行光电变化处理得到第一下行电信号，从而实现上行及下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。In this embodiment of the present application, a set of optical structures can be used to perform optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal and the second downlink optical signal are the first downlink optical signal The uplink optical signal is divided into two optical signals, the uplink optical signal is used to reflect back to the second optical wireless device, and the second downlink optical signal is used to receive and perform photoelectric change processing to obtain the first downlink electrical signal, thereby realizing uplink and downlink communication Function, and can reduce the complexity of optical wireless equipment, improve the integration of optical wireless equipment.
附图说明Description of drawings
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments of the present application. Obviously, the accompanying drawings described below are only some embodiments of the present application. Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.
图1为本申请实施例提供的一种光无线通信系统的架构示意图；FIG. 1 is a schematic structural diagram of an optical wireless communication system provided by an embodiment of the present application;
图2为本申请实施例提供的一种光无线通信系统的架构示意图；FIG. 2 is a schematic structural diagram of an optical wireless communication system provided by an embodiment of the present application;
图3为本申请实施例提供的一种光无线通信系统的架构示意图；FIG. 3 is a schematic structural diagram of an optical wireless communication system provided by an embodiment of the present application;
图4为本申请实施例提供的一种光无线通信的应用场景示意图；FIG. 4 is a schematic diagram of an application scenario of optical wireless communication provided by an embodiment of the present application;
图5为本申请实施例提供的一种光无线通信的应用场景示意图；FIG. 5 is a schematic diagram of an application scenario of optical wireless communication provided by an embodiment of the present application;
图6为本申请实施例提供的一种光无线设备的结构示意图；FIG. 6 is a schematic structural diagram of an optical wireless device provided by an embodiment of the present application;
图7为本申请实施例提供的另一种光无线设备的结构示意图；FIG. 7 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application;
图8为本申请实施例提供的又一种光无线设备的结构示意图；FIG. 8 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application;
图9为本申请实施例提供的又一种光无线设备的结构示意图；FIG. 9 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application;
图10为本申请实施例提供的又一种光无线设备的结构示意图；FIG. 10 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application;
图11为本申请实施例提供的又一种光无线设备的结构示意图；FIG. 11 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application;
图12为本申请实施例提供的又一种光无线设备的结构示意图；FIG. 12 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application;
图13为本申请实施例提供的又一种光无线设备的结构示意图；FIG. 13 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application;
图14为本申请实施例提供的一种通信方法的流程示意图；FIG. 14 is a schematic flowchart of a communication method provided in an embodiment of the present application;
图15为本申请实施例提供的另一种通信方法的流程示意图；FIG. 15 is a schematic flowchart of another communication method provided by the embodiment of the present application;
图16为本申请实施例提供的又一种通信方法的流程示意图；FIG. 16 is a schematic flowchart of another communication method provided by the embodiment of the present application;
图17为本申请实施例提供的又一种通信方法的流程示意图；FIG. 17 is a schematic flowchart of another communication method provided in the embodiment of the present application;
图18为本申请实施例提供的又一种通信方法的流程示意图；FIG. 18 is a schematic flowchart of another communication method provided by the embodiment of the present application;
图19为本申请实施例提供的又一种通信方法的流程示意图；FIG. 19 is a schematic flowchart of another communication method provided by the embodiment of the present application;
图20为本申请实施例提供的一种通信装置的结构示意图；FIG. 20 is a schematic structural diagram of a communication device provided by an embodiment of the present application;
图21为本申请实施例提供的一种通信装置的结构示意图；FIG. 21 is a schematic structural diagram of a communication device provided by an embodiment of the present application;
图22为本申请实施例提供的一种芯片的结构示意图。FIG. 22 is a schematic structural diagram of a chip provided by an embodiment of the present application.
具体实施方式Detailed ways
为了使本申请的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图对本申请实施例进行描述。In order to make the purpose, technical solution and advantages of the present application clearer, the following will describe the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application.
如背景技术部分所述，目前需要研究如何解决光无线设备小型化、高集成度以及光无线设备上行、下行双工通信的技术问题。本申请实施例提供了一种光无线设备、通信方法及通信系统，涉及光通信技术领域，可以利用一套光学结构实现上行及下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。As mentioned in the background technology section, it is currently necessary to study how to solve the technical problems of miniaturization and high integration of optical wireless equipment and uplink and downlink duplex communication of optical wireless equipment. Embodiments of the present application provide an optical wireless device, a communication method, and a communication system, which relate to the field of optical communication technology. A set of optical structures can be used to realize uplink and downlink communication functions, and can reduce the complexity of optical wireless equipment and improve optical wireless communication. The degree of integration of the device.
为了更清楚地描述本申请的方案，下面先介绍一些与光通信相关的知识。In order to describe the solution of this application more clearly, some knowledge related to optical communication will be introduced below.
猫眼透镜：是组合透镜。由一个凹透镜和一个凸透镜组成，物镜是凹透镜，目镜是凸透镜，但物镜的焦距较短，目镜的焦距较长，且目镜的焦距应等于或大于物镜与目镜的距离(猫眼的长度)和目镜的焦距之和。Cat's eye lens: It is a combined lens. It consists of a concave lens and a convex lens. The objective lens is a concave lens, and the eyepiece is a convex lens, but the focal length of the objective lens is short, and the focal length of the eyepiece is long, and the focal length of the eyepiece should be equal to or greater than the distance between the objective lens and the eyepiece (the length of the cat's eye) and the sum of focal lengths.
半透射镜(semitransparent mirror)：使入射光能量一部分反射，一部分透射的反射镜。Semitransparent mirror: A mirror that reflects part of the incident light energy and transmits part of it.
光无线通信：是无线通信技术中的关键领域之一。区别于5～6GHz、60GHz以及THz频段的无线通信系统，光无线通信技术具有可用带宽大、发射天线小、抗电磁干扰等优势。当前高速光无线通信系统方案主要应用在单用户点对点、软输入软输出(Soft-Input Soft-Output，SISO)通信场景。为实现高速光无线通信，系统中的光源及光电探测器采用宽带器件，其中，宽带光电探测器有效面积(active area)较小，直径um量级，对整个通信系统有较高的对准要求。在工业物联网等应用场景，需要多个终端节点反馈实时信息，在保证通信速率的同时，对光无线通信终端提出小型化、高集成度的需求。Optical wireless communication: It is one of the key fields in wireless communication technology. Different from wireless communication systems in the 5-6GHz, 60GHz, and THz frequency bands, optical wireless communication technology has the advantages of large available bandwidth, small transmitting antenna, and anti-electromagnetic interference. The current high-speed optical wireless communication system solution is mainly used in single-user point-to-point, soft-input soft-output (Soft-Input Soft-Output, SISO) communication scenarios. In order to realize high-speed optical wireless communication, the light source and photodetector in the system adopt broadband devices. Among them, the active area of the broadband photodetector is small, and the diameter is on the order of um, which has high alignment requirements for the entire communication system. . In application scenarios such as the Industrial Internet of Things, multiple terminal nodes are required to feed back real-time information. While ensuring the communication rate, the optical wireless communication terminal is required to be miniaturized and highly integrated.
无光源的光无线通信(Optical Wireless Communication，OWC)终端：通常采用角反射镜作为上行光学系统。上行通信时，将OWC基站发出的光信号逆向反射回OWC基站，不需要采用波束调整单元，可以降低OWC终端的复杂度。但是基于角反射镜的光学系统不具备下行通信功能，因此，下行通信时需要配置额外的接收透镜及波束调整结构用于下行光信号接收。Optical Wireless Communication (OWC) terminal without light source: corner reflectors are usually used as the uplink optical system. During uplink communication, the optical signal sent by the OWC base station is reflected back to the OWC base station without using a beam adjustment unit, which can reduce the complexity of the OWC terminal. However, the optical system based on the corner reflector does not have the function of downlink communication. Therefore, an additional receiving lens and a beam adjustment structure need to be configured for downlink optical signal reception during downlink communication.
为了进一步提高OWC终端的系统的集成度，降低成本和体积，OWC终端需要采用新的架构，在保持原有的上行通信功能基础上，设计新的光学结构实现下行信号接收，避免在OWC终端系统中采用复杂的波束调整或跟瞄等光学系统。In order to further improve the integration of the OWC terminal system and reduce the cost and size, the OWC terminal needs to adopt a new architecture. On the basis of maintaining the original uplink communication function, a new optical structure is designed to realize the downlink signal reception, avoiding the OWC terminal system. Optical systems such as complex beam adjustment or tracking and aiming are used in the system.
下面结合本申请实施例中的附图对本申请实施例进行描述。Embodiments of the present application are described below with reference to the drawings in the embodiments of the present application.
示例性的，本申请实施例应用的通信系统100可参阅图1，图1为本申请实施例提供的一种光无线通信系统的架构示意图。Exemplarily, the communication system 100 applied in the embodiment of the present application may refer to FIG. 1 , which is a schematic structural diagram of an optical wireless communication system provided in the embodiment of the present application.
如图1所示，该通信系统100主要包括光无线网络设备和光无线终端设备两部分。As shown in FIG. 1 , the communication system 100 mainly includes two parts: an optical wireless network device and an optical wireless terminal device.
其中，光无线网络设备包括但不限于光源、微机电系统(Micro-Electro-Mechanical Systems，MEMS)振镜、透镜和光电探测器。光无线终端设备包括但不限于透镜、光电探测器、空间光调制器和角反射镜。各网元之间的接口如图1中所示。应理解，网元之间还可以采用服务化接口进行通信。Wherein, the optical wireless network equipment includes but is not limited to a light source, a micro-electro-mechanical system (Micro-Electro-Mechanical Systems, MEMS) oscillating mirror, a lens, and a photodetector. Optical wireless end devices include, but are not limited to, lenses, photodetectors, spatial light modulators, and corner mirrors. Interfaces between network elements are shown in FIG. 1 . It should be understood that service interfaces may also be used for communication between network elements.
本申请实施例中的光无线终端设备，可以经接入网络(access network，AN)设备与一个或多个核心网(core network，CN)进行通信，包括但不限于经由有线线路连接，如经由公共交换电话网络(Public Switched Telephone Networks，PSTN)、数字用户线路(Digital Subscriber  Line，DSL)、数字电缆、直接电缆连接；和/或另一数据连接网络；和/或经由无线接口，如：针对蜂窝网络、无线局域网(Wireless Local Area Network，WLAN)、诸如手持数字电视广播(Digital Video Broadcast-Handheld，DVB-H)网络的数字电视网络、卫星网络、调幅-调频(Amplitude Modulation-Frequency Modulation，AM-FM)广播发送器；和/或另一终端设备的被设置成接收/发送通信信号的装置；和/或物联网(Internet of Things，IoT)设备。被设置成通过无线接口通信的光无线终端设备可以被称为“无线通信终端”、“无线终端”或“移动终端”。该光无线终端设备的示例包括但不限于卫星电话或蜂窝电话；可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信系统(Personal Communications System，PCS)终端；可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历和/或全球定位系统(Global Positioning System，GPS)接收器的个人数字助理(personal digital assistant，PDA)；以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子装置。光无线终端设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。光无线终端设备还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、物联网或车联网中的终端设备、5G网络中的终端设备、未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备以及未来网络中的任意形态的终端设备等。The optical wireless terminal device in the embodiment of the present application can communicate with one or more core networks (core network, CN) via an access network (access network, AN) device, including but not limited to a wired line connection, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection; and/or another data connection network; and/or via a wireless interface, e.g. for Cellular network, Wireless Local Area Network (WLAN), digital TV network such as Digital Video Broadcast-Handheld (DVB-H) network, satellite network, AM (Amplitude Modulation-Frequency Modulation, AM - FM) broadcast transmitter; and/or a device of another terminal device configured to receive/send communication signals; and/or an Internet of Things (IoT) device. An optical wireless terminal device arranged to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of such optical wireless terminal equipment include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data communication capabilities; may include radiotelephones, pagers , Internet/Intranet access, Web browser, organizer, calendar, and/or a personal digital assistant (PDA) with a Global Positioning System (GPS) receiver; and a regular laptop and/or Or palm receivers or other electronic devices including radiotelephone transceivers. Optical wireless terminal equipment may also be called user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device , User Agent, or User Device. The optical wireless terminal equipment can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (PDA), a Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in the Internet of Things or Internet of Vehicles, terminal devices in 5G networks, future evolution of public land mobile communications Terminal equipment in the network (public land mobile network, PLMN) and any form of terminal equipment in the future network.
本申请实施例中的光无线网络设备，是一种将光无线终端设备接入到无线网络的设备，具体可以为基站。基站可以包括各种形式的基站，例如：宏基站，微基站(也称为小站)，中继站，接入点等。具体可以为：无线局域网(wireless local area network，WLAN)中的接入点(access point，AP)，全球移动通信系统(global system for mobile communications，GSM)或码分多址接入(code division multiple access，CDMA)中的基站(base transceiver station，BTS)，也可以是宽带码分多址(wideband code division multiple access，WCDMA)中的基站(NodeB，NB)，还可以是LTE中的演进型基站(Evolved Node B，eNB或eNodeB)，或者中继站或接入点，或者车载设备、可穿戴设备以及5G系统中的下一代节点B(the next generation Node B，gNB)或者未来演进的公用陆地移动网(public land mobile network，PLMN)网络中的基站等，本申请实施例对此不作具体限定。The optical wireless network device in the embodiment of the present application is a device for connecting an optical wireless terminal device to a wireless network, and may specifically be a base station. The base station may include various forms of base stations, for example: macro base stations, micro base stations (also called small stations), relay stations, access points, and the like. Specifically, it can be: access point (access point, AP) in wireless local area network (wireless local area network, WLAN), global system for mobile communications (global system for mobile communications, GSM) or code division multiple access (code division multiple access) access, CDMA) in the base station (base transceiver station, BTS), can also be wideband code division multiple access (wideband code division multiple access, WCDMA) in the base station (NodeB, NB), can also be the evolved base station in LTE (Evolved Node B, eNB or eNodeB), or relay stations or access points, or vehicle-mounted devices, wearable devices, and the next generation Node B (the next generation Node B, gNB) in 5G systems or future evolution of public land mobile networks The base stations in the (public land mobile network, PLMN) network, etc., are not specifically limited in this embodiment of the present application.
应理解，本申请实施例并不限定只应用于图1所示的通信系统架构中。例如，可以应用本申请实施例的通信方法的通信系统中可以包括更多或更少的网元或设备。图1中的设备或网元可以是硬件，也可以是从功能上划分的软件或者以上二者的结合。图1中的设备或网元之间可以通过其他设备或网元通信。It should be understood that the embodiment of the present application is not limited to be only applied to the communication system architecture shown in FIG. 1 . For example, the communication system to which the communication method of the embodiment of the present application can be applied may include more or less network elements or devices. The devices or network elements in FIG. 1 may be hardware, or functionally divided software, or a combination of the above two. The devices or network elements in FIG. 1 may communicate through other devices or network elements.
由图1可以看出，光无线网络设备利用光源和光电探测器实现下行光信号发射及上行光信号接收。光无线终端设备利用角反射镜和空间光调制器实现上行光信号的传输及光信号调制，角反射镜的表面为全反射层，空间光调制器覆盖全部角反射镜表面，下行光信号接收功能利用透镜及光电探测器实现。It can be seen from FIG. 1 that the optical wireless network equipment uses a light source and a photodetector to realize downlink optical signal transmission and uplink optical signal reception. The optical wireless terminal equipment uses the corner reflector and the spatial light modulator to realize the transmission and modulation of the uplink optical signal. The surface of the corner reflector is a total reflection layer, and the spatial light modulator covers the entire corner reflector surface. Realized by lens and photodetector.
但是，上述基于角反射镜和空间光调制器的上行通信系统不具备下行光信号解调和接收的功能，需要配置额外的光学透镜用于下行光信号接收，不利于光无线终端设备的小型化和高集成度，尤其在终端移动及姿态变化的应用场景下，接收透镜需要配置完整的跟瞄系统，用于实时下行光信号的接收。并且，针对上行或下行通信场景，光无线网络设备侧的光源波 束不能太窄，需要覆盖光无线终端设备的收光透镜，较难兼顾上行及下行通信的性能。However, the above-mentioned uplink communication system based on corner reflectors and spatial light modulators does not have the function of demodulating and receiving downlink optical signals, and needs to configure additional optical lenses for downlink optical signal reception, which is not conducive to the miniaturization of optical wireless terminal equipment And high integration, especially in the application scenario of terminal movement and attitude change, the receiving lens needs to be equipped with a complete tracking and aiming system for real-time downlink optical signal reception. Moreover, for uplink or downlink communication scenarios, the beam of the light source on the side of the optical wireless network device should not be too narrow, and it needs to cover the receiving lens of the optical wireless terminal device, making it difficult to balance the performance of uplink and downlink communication.
示例性的，本申请实施例应用的通信系统200可参阅图2，图2为本申请实施例提供的另一种通信系统的架构示意图。For example, reference may be made to FIG. 2 for the communication system 200 applied in the embodiment of the present application. FIG. 2 is a schematic structural diagram of another communication system provided in the embodiment of the present application.
如图2所示，该通信系统200主要包括光无线网络设备和光无线终端设备两部分。As shown in FIG. 2 , the communication system 200 mainly includes two parts: an optical wireless network device and an optical wireless terminal device.
其中，光无线网络设备包括但不限于光源、MEMS振镜、透镜和光电探测器。光无线终端设备包括但不限于透镜、光电探测器、角反射镜。各网元之间的接口如图2中所示。应理解，网元之间还可以采用服务化接口进行通信。Wherein, the optical wireless network equipment includes but not limited to a light source, a MEMS vibrating mirror, a lens and a photodetector. Optical wireless terminal equipment includes, but is not limited to, lenses, photodetectors, and corner mirrors. Interfaces between network elements are shown in FIG. 2 . It should be understood that service interfaces may also be used for communication between network elements.
本申请实施例所示的通信系统中的光无线网络设备和光无线终端设备与上述图1中的通信系统类似，此处不再赘述。The optical wireless network device and the optical wireless terminal device in the communication system shown in the embodiment of the present application are similar to the communication system in FIG. 1 above, and will not be repeated here.
应理解，本申请实施例并不限定只应用于图2所示的通信系统架构中。例如，可以应用本申请实施例的通信方法的通信系统中可以包括更多或更少的网元或设备。图2中的设备或网元可以是硬件，也可以是从功能上划分的软件或者以上二者的结合。图2中的设备或网元之间可以通过其他设备或网元通信。It should be understood that the embodiment of the present application is not limited to be only applied to the communication system architecture shown in FIG. 2 . For example, the communication system to which the communication method of the embodiment of the present application can be applied may include more or less network elements or devices. The devices or network elements in FIG. 2 may be hardware, or functionally divided software, or a combination of the above two. The devices or network elements in FIG. 2 may communicate through other devices or network elements.
由图2可以看出，光无线网络设备利用光源和光电探测器实现下行光信号发射及上行光信号接收，光无线终端设备利用角反射镜结构中预留部分空间放置用于接收的光学透镜实现下行光信号接收，角反射镜和空间光调制器实现上行光信号的传输及光信号调制，角反射镜的表面为全反射层，空间光调制器覆盖全部角反射镜表面。It can be seen from Figure 2 that optical wireless network equipment uses light sources and photodetectors to realize downlink optical signal transmission and uplink optical signal reception, and optical wireless terminal equipment uses part of the space reserved in the corner reflector structure to place optical lenses for reception. The downlink optical signal is received, and the corner reflector and the spatial light modulator realize the transmission and modulation of the uplink optical signal. The surface of the corner reflector is a total reflection layer, and the spatial light modulator covers the entire surface of the corner reflector.
但是，上述基于角反射镜结构中预留部分空间放置用于接收下行光信号的光学透镜破坏了角反射镜完整的光路，导致部分角度入射光束无法原路返回。并且，高速下行通信要求收光口径越大越好，会导致占用角反射镜的面积过大，从而使上行反馈光通信功率偏低。因此，在体积受限的情况下，下行和上行光学口径存在本质矛盾，无法同时确保下行及上行通信的性能。However, part of the space reserved in the above-mentioned corner reflector-based structure for placing the optical lens for receiving the downlink optical signal destroys the complete optical path of the corner reflector, resulting in the inability of part of the incident light beam to return to the original path. Moreover, the high-speed downlink communication requires the larger the optical receiving aperture, the better, which will result in too large area occupied by the corner reflector, resulting in low upstream feedback optical communication power. Therefore, in the case of limited volume, there is an essential contradiction between downlink and uplink optical apertures, and it is impossible to ensure the performance of downlink and uplink communication at the same time.
针对上述图1和图2中存在的无法兼顾光无线设备小型化、高集成度的需求与上行、下行通信功能的需求的技术问题，本申请提供了一种光无线设备、通信方法及通信系统，涉及光通信技术领域，可以利用一套光学结构实现上行及下行通信功能，且同时能降低光无线设备的复杂度，提高光无线设备的集成度。Aiming at the technical problems existing in the above-mentioned Fig. 1 and Fig. 2 that the requirements for miniaturization and high integration of optical wireless equipment and the requirements for uplink and downlink communication functions cannot be taken into account, the present application provides an optical wireless equipment, a communication method and a communication system , relates to the field of optical communication technology, can use a set of optical structures to realize uplink and downlink communication functions, and at the same time can reduce the complexity of optical wireless equipment and improve the integration degree of optical wireless equipment.
本申请实施例提供的技术方案可以应用于各种通信系统，例如，卫星通信系统，卫星通信与蜂窝网络融合的系统。其中，蜂窝网络系统可以包括但不限于：第五代(5th generation，5G)系统、全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)系统、先进的长期演进(Advanced long term evolution，LTE-A)系统、新空口(New Radio，NR)系统、NR系统的演进系统、非授权频段上的LTE(LTEbased access to unlicensed spectrum，LTE-U)系统、非授权频段上的NR(NR-based access to unlicensed spectrum，NR-U)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统、无线局域网(Wireless Local Area Networks，WLAN)、无线保真(Wireless Fidelity，WiFi)、下一代通信系统或其他通信系统等。通常来说，传统的通信系统支持的连接数有限，也易于实现，然而，随着通信技术的发展，移动通信系统将不仅支持传统的通信，还将支持例如：设备到设备(Device to Device，D2D)通信，机器到机器(Machine to Machine，M2M)通信，机器类型通信 (Machine Type Communication，MTC)，车辆间(Vehicle to Vehicle，V2V)通信以及未来演进的其他通信系统等其他新的系统，本申请实施例也可以应用于这些通信系统。卫星通信系统可以包括各种非陆地网络系统，例如，卫星或无人机系统(unmanned aircraft system，UAS)平台等进行无线频率发射的网络，此处不再一一列举。The technical solutions provided by the embodiments of the present application can be applied to various communication systems, for example, a satellite communication system, and a system in which satellite communication and a cellular network are integrated. Among them, the cellular network system may include but not limited to: the fifth generation (5th generation, 5G) system, the Global System of Mobile communication (GSM) system, the code division multiple access (Code Division Multiple Access, CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex, FDD) system, LTE time division duplex (Time Division Duplex, TDD) system, advanced long term evolution (Advanced long term evolution, LTE-A) system, new air interface (New Radio, NR) system, evolution system of NR system, non LTE (LTE-based access to unlicensed spectrum, LTE-U) system on the licensed frequency band, NR (NR-based access to unlicensed spectrum, NR-U) system on the unlicensed frequency band, Universal Mobile Telecommunications System (Universal Mobile Telecommunications System, UMTS) ), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems or other communication systems, etc. Generally speaking, the number of connections supported by traditional communication systems is limited and easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but will also support, for example: Device to Device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), vehicle to vehicle (Vehicle to Vehicle, V2V) communication and other new systems such as other communication systems that will evolve in the future, The embodiments of the present application may also be applied to these communication systems. The satellite communication system may include various non-terrestrial network systems, for example, a satellite or an unmanned aircraft system (unmanned aircraft system, UAS) platform, and other networks for wireless frequency transmission, which will not be listed here.
下面将结合附图对本申请提供的光无线设备、通信方法、通信系统及应用场景进行说明。The optical wireless device, communication method, communication system and application scenarios provided by the present application will be described below with reference to the accompanying drawings.
示例性的，本申请实施例应用的通信系统300可参阅图3，图3为本申请实施例提供的一种通信系统的架构示意图。For example, reference may be made to FIG. 3 for the communication system 300 applied in the embodiment of the present application. FIG. 3 is a schematic structural diagram of a communication system provided in the embodiment of the present application.
如图3所示，该通信系统300主要包括光无线网络设备和光无线终端设备两部分。As shown in FIG. 3 , the communication system 300 mainly includes two parts: an optical wireless network device and an optical wireless terminal device.
其中，光无线网络设备包括但不限于光源、光学前端、光电探测器、调制消除单元、发射机信号处理单元以及接收机信号处理单元。光无线终端设备包括但不限于光学前端、收发前端、调制消除单元、发射机信号处理单元以及接收机信号处理单元。各网元之间的接口如图3中所示。应理解，网元之间还可以采用服务化接口进行通信。Wherein, the optical wireless network equipment includes but not limited to a light source, an optical front end, a photodetector, a modulation cancellation unit, a transmitter signal processing unit, and a receiver signal processing unit. Optical wireless terminal equipment includes, but is not limited to, an optical front end, a transceiver front end, a modulation cancellation unit, a transmitter signal processing unit, and a receiver signal processing unit. The interfaces between network elements are shown in FIG. 3 . It should be understood that service interfaces may also be used for communication between network elements.
本申请实施例所示的通信系统中的光无线网络设备和光无线终端设备与上述图1中的通信系统类似，此处不再赘述。The optical wireless network device and the optical wireless terminal device in the communication system shown in the embodiment of the present application are similar to the communication system in FIG. 1 above, and will not be repeated here.
由图3可以看出，光无线终端设备的光学前端接收下行光信号，其中，该下行光信号中的一部分光信号反射回光无线网络设备，并实现上行调制，另一部分光信号穿透光学前端，输出至光无线终端设备的收发前端，实现部分下行光信号接收。光无线终端设备的收发前端用于接收部分下行光信号，并完成光电变换，输出下行电信号给后端调制消除单元。调制消除接收下行电信号和发射机信号处理单元输出的上行电信号，并基于上行电信号，抵消上行电信号引起的对部分下行光信号的二次调制，输出处理后的下行电信号给接收机信号处理单元。It can be seen from Figure 3 that the optical front-end of the optical wireless terminal device receives the downlink optical signal, wherein a part of the downlink optical signal is reflected back to the optical wireless network device and realizes uplink modulation, and the other part of the optical signal penetrates the optical front-end , output to the transceiver front-end of the optical wireless terminal equipment to realize partial downlink optical signal reception. The transceiver front-end of the optical wireless terminal equipment is used to receive part of the downlink optical signal, complete the photoelectric conversion, and output the downlink electrical signal to the back-end modulation and elimination unit. Modulation eliminates the received downlink electrical signal and the uplink electrical signal output by the transmitter signal processing unit, and based on the uplink electrical signal, offsets the secondary modulation of part of the downlink optical signal caused by the uplink electrical signal, and outputs the processed downlink electrical signal to the receiver Signal processing unit.
具体的，光无线终端设备的光学前端接收光无线网络设备输出的下行光信号，利用光学前端实现下行光信号接收。其核心器件包括但不限于猫眼透镜、空间光调制器、半透射镜等。若光学前端采用猫眼透镜和半透射镜作为透射光学结构，下行光信号将依次经过猫眼透镜、空间光调制器、半透射镜共同作用，实现下行光信号部分接收，部分反射回光无线网络设备，同时利用空间光调制器实现上行光信号的调制。若光学前端采用角反射镜作为反射光学结构，下行光信号首先通过光调制器，然后进入角反射镜构建的反射光路。Specifically, the optical front end of the optical wireless terminal device receives the downlink optical signal output by the optical wireless network device, and uses the optical front end to realize the reception of the downlink optical signal. Its core components include but are not limited to cat-eye lenses, spatial light modulators, semi-transmissive mirrors, etc. If the optical front-end adopts a cat's-eye lens and a semi-transmissive mirror as the transmission optical structure, the downlink optical signal will pass through the cat's-eye lens, spatial light modulator, and semi-transmissive mirror in sequence to achieve partial reception of the downlink optical signal and partial reflection back to the optical wireless network device. At the same time, the spatial light modulator is used to realize the modulation of the uplink optical signal. If the optical front end uses a corner reflector as a reflective optical structure, the downlink optical signal first passes through the optical modulator, and then enters the reflected light path constructed by the corner reflector.
光无线终端设备的收发前端用于接收光学前端输出的下行光信号，并利用荧光材料实现大面积下行光信号接收，配合光电探测器或光电探测器阵列实现光电变换。The transceiver front-end of optical wireless terminal equipment is used to receive the downlink optical signal output by the optical front-end, and use fluorescent materials to realize large-area downlink optical signal reception, and cooperate with photodetectors or photodetector arrays to realize photoelectric conversion.
光无线终端设备的调制消除单元包括延时计算、信号重构以及调制抵消功能，用于重新构建光无线终端设备接收到的电信号，实现二次调制抵消。其核心器件包括但不限于时间数字转换器、延时器、可调衰减器、除法器等。需要注意的是，在无需调制消除的情况下，光无线终端设备的调制消除单元可作为可选项。The modulation cancellation unit of the optical wireless terminal equipment includes functions of delay calculation, signal reconstruction and modulation cancellation, which are used to reconstruct the electrical signal received by the optical wireless terminal equipment to realize secondary modulation cancellation. Its core components include but are not limited to time-to-digital converters, delayers, adjustable attenuators, dividers, etc. It should be noted that the modulation cancellation unit of the optical wireless terminal equipment can be used as an option when no modulation cancellation is required.
光无线终端设备的发射机信号处理单元和接收机信号处理单元的主要功能是实现电信号之间的数模/模数转化以及通用的信道编码/均衡。具体实现方式包括但不限于采用现场可编程门阵列(Field－Programmable Gate Array，FPGA)、特定用途集成电路(Application Specific Integrated Circuit，ASIC)、逻辑电路等。The main functions of the transmitter signal processing unit and the receiver signal processing unit of optical wireless terminal equipment are to realize digital-to-analog/analog-to-digital conversion between electrical signals and general channel coding/equalization. Specific implementation methods include but are not limited to the use of Field Programmable Gate Array (Field-Programmable Gate Array, FPGA), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), logic circuits, etc.
相应的，光无线网络设备的光源发射下行光信号，该下行光信号根据发射机信号处理单元发送的下行电信号实现下行调制，该下行光信号经过光学前端后传输至光无线终端设备。光无线网络设备的光学前端还将接收光无线终端设备发送的上行光信号，并利用光电探测器或光电探测器阵列实现光电变换，输出上行电信号给后端调制消除单元。调制消除接收上行 电信号和发射机信号处理单元输出的下行电信号，并基于下行电信号，抵消下行电信号引起的对部分上行光信号的二次调制，输出处理后的上行电信号给接收机信号处理单元。Correspondingly, the light source of the optical wireless network device emits a downlink optical signal, and the downlink optical signal is modulated according to the downlink electrical signal sent by the signal processing unit of the transmitter, and the downlink optical signal is transmitted to the optical wireless terminal device after passing through the optical front end. The optical front-end of the optical wireless network equipment will also receive the uplink optical signal sent by the optical wireless terminal equipment, and use photodetectors or photodetector arrays to realize photoelectric conversion, and output uplink electrical signals to the back-end modulation and elimination unit. Modulation eliminates the received uplink electrical signal and the downlink electrical signal output by the transmitter signal processing unit, and based on the downlink electrical signal, cancels the secondary modulation of part of the uplink optical signal caused by the downlink electrical signal, and outputs the processed uplink electrical signal to the receiver Signal processing unit.
应理解，本申请实施例并不限定只应用于图3所示的通信系统架构中。例如，可以应用本申请实施例的通信方法的通信系统中可以包括更多或更少的网元或设备。图3中的设备或网元可以是硬件，也可以是从功能上划分的软件或者以上二者的结合。图3中的设备或网元之间可以通过其他设备或网元通信。It should be understood that the embodiment of the present application is not limited to be only applied to the communication system architecture shown in FIG. 3 . For example, the communication system to which the communication method of the embodiment of the present application can be applied may include more or less network elements or devices. The devices or network elements in FIG. 3 may be hardware, or functionally divided software, or a combination of the above two. The devices or network elements in FIG. 3 may communicate through other devices or network elements.
本申请中的光无线设备具备小型化、低复杂度、高集成度的特点，应用于光无线通信系统，尤其适用于需要多个密集分布的光无线设备的物联网、车联网等场景，在实际应用中能够快速布置多节点通信。The optical wireless device in this application has the characteristics of miniaturization, low complexity, and high integration, and is applied to optical wireless communication systems, especially for scenarios such as the Internet of Things and the Internet of Vehicles that require multiple densely distributed optical wireless devices. In practical applications, multi-node communication can be quickly arranged.
示例性的，本申请实施例应用的场景可参阅图4，图4为本申请实施例提供的一种光无线通信的应用场景示意图。For example, the application scenario of the embodiment of the present application may refer to FIG. 4 , which is a schematic diagram of an application scenario of optical wireless communication provided by the embodiment of the present application.
如图4所示，在需要多个密集分布的光无线设备的物联网场景中，通过在物联网场景中的各个物体上部署本申请实施例中的光无线终端设备，光无线网络设备向各个部署的光无线终端设备发送控制指令(如图4中的控制指令1、控制指令2、控制指令3)，各个光无线终端设备再向光无线网络设备发送反馈指令(如图4中的反馈指令1、反馈指令2、反馈指令3)，实现把获取的各个物体的状态信息及其变化的方式从时间(或空间)上的一点传送到另一点的任务，从而实现对物联网场景中的各个物体的智能化识别、定位、跟踪、监控和管理等控制。As shown in Figure 4, in the Internet of Things scenario that requires multiple densely distributed optical wireless devices, by deploying the optical wireless terminal device in the embodiment of the present application on each object in the Internet of Things scene, the optical wireless network device provides The deployed optical wireless terminal equipment sends control commands (such as control command 1, control command 2, and control command 3 in Figure 4), and each optical wireless terminal equipment sends feedback commands to the optical wireless network equipment (such as the feedback command in Figure 4). 1. Feedback instruction 2, feedback instruction 3), realize the task of transmitting the obtained state information of each object and its changing mode from one point in time (or space) to another point, so as to realize the task of each object in the Internet of Things scene Intelligent identification, positioning, tracking, monitoring and management of objects.
示例性的，本申请实施例应用的场景可参阅图5，图5为本申请实施例提供的一种光无线通信的应用场景示意图。For example, the application scenario of the embodiment of the present application may refer to FIG. 5 , which is a schematic diagram of an application scenario of optical wireless communication provided by the embodiment of the present application.
如图5所示，该应用场景包括车辆和多个路侧单元，通过在各个路侧单元上部署本申请中的光无线终端设备，在车辆上部署本申请中的光无线网络设备，可以实现路侧单元与车辆之间的通信，从而实现路侧单元为车辆提供多种服务。路侧单元可以安装在路侧，采用无线通信的方式与车辆进行交互，与车辆通信可以采用专用短距离通讯(dedicated short range communication，DSRC)技术，也可以采用基于蜂窝网的V2X(C-V2X)通信，例如，基于长期演进(long term evolution，LTE)通信协议或基于第五代(5th generation，5G)通信协议。路侧单元可以为车辆提供服务，例如实现车辆身份识别，电子收费，电子扣分等。路侧单元可以安装传感装置，以实现对道路信息的采集，进而提供车路协同服务。路侧单元可以对接路侧交通牌(例如，电子红绿灯、或电子限速牌等)，以实现对红绿灯、或限速牌的实时控制，或者可以通过云端或直接将道路信息提供给车辆，以提升自动驾驶或辅助驾驶功能。示例性的，车辆通过搭载的光无线网络设备向路侧单元发送车况信息及路径终点，路侧单元通过搭载的光无线终端设备向车辆反馈实时路径规划。As shown in Figure 5, the application scenario includes a vehicle and multiple roadside units. By deploying the optical wireless terminal equipment in this application on each roadside unit and deploying the optical wireless network equipment in this application on the vehicle, you can realize The communication between the roadside unit and the vehicle, so that the roadside unit can provide various services for the vehicle. The roadside unit can be installed on the roadside and interact with the vehicle through wireless communication. The communication with the vehicle can use dedicated short range communication (DSRC) technology, or V2X (C-V2X) based on cellular network. ) communication, for example, based on a long term evolution (long term evolution, LTE) communication protocol or based on a fifth generation (5th generation, 5G) communication protocol. Roadside units can provide services for vehicles, such as vehicle identification, electronic toll collection, and electronic point deduction. Roadside units can be equipped with sensing devices to collect road information and provide vehicle-road coordination services. The roadside unit can be connected to roadside traffic signs (for example, electronic traffic lights, or electronic speed limit signs, etc.) to realize real-time control of traffic lights or speed limit signs, or can provide road information to vehicles through the cloud or directly to Improve automatic driving or assisted driving functions. Exemplarily, the vehicle sends vehicle condition information and route end points to the roadside unit through the onboard optical wireless network equipment, and the roadside unit feeds back real-time path planning to the vehicle through the onboard optical wireless terminal equipment.
请参阅图6，图6为本申请实施例提供的一种光无线设备的结构示意图。Referring to FIG. 6 , FIG. 6 is a schematic structural diagram of an optical wireless device provided by an embodiment of the present application.
如图6所示，光无线设备包括第一处理单元10和第一收发单元20。As shown in FIG. 6 , the optical wireless device includes a first processing unit 10 and a first transceiver unit 20 .
在一些可能的实施例中，第一处理单元10以及第一收发单元20的功能如下：In some possible embodiments, the functions of the first processing unit 10 and the first transceiver unit 20 are as follows:
第一处理单元10，用于对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号；其中，上行光信号和第二下行光信号为第一下行光信号分成的两路光信号，上行光信号用于反射回第二光无线设备。The first processing unit 10 is configured to perform optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal; wherein, the uplink optical signal and the second downlink optical signal are divided into the first downlink optical signal Two paths of optical signals, the uplink optical signal is used to reflect back to the second optical wireless device.
第一收发单元20，用于获取第二下行光信号，发送第一下行电信号。The first transceiver unit 20 is configured to acquire the second downlink optical signal and send the first downlink electrical signal.
可以理解的是，第一下行光信号经过光信号处理后分成了上行光信号和第二下行光信号的至少两路光信号，其中，上行光信号用于反射回第二光无线设备，该第二光无线设备具体 可以是发送上述第一下行光信号的设备，第二下行光信号用于本实施例中的光无线设备(本实施例中的光无线设备也可称为第一光无线设备，用于区别第二光无线设备)自己接收。具体为第一光无线设备中的第一收发单元20用于接收上述第二下行光信号，并对第二下行光信号执行光电变化处理，得到第一下行电信号。It can be understood that, after optical signal processing, the first downlink optical signal is divided into at least two optical signals of an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal is used for reflection back to the second optical wireless device, the The second optical wireless device may specifically be a device that sends the above-mentioned first downlink optical signal, and the second downlink optical signal is used for the optical wireless device in this embodiment (the optical wireless device in this embodiment may also be referred to as the first optical The wireless device is used to distinguish the second optical wireless device) from receiving by itself. Specifically, the first transceiver unit 20 in the first optical wireless device is configured to receive the above-mentioned second downlink optical signal, and perform photoelectric change processing on the second downlink optical signal to obtain the first downlink electrical signal.
通过本申请实施例，可以利用包括但不限于第一处理单元和第一收发单元的一套光学结构，同时实现第一光无线设备上行及下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。Through the embodiment of the present application, a set of optical structures including but not limited to the first processing unit and the first transceiver unit can be used to simultaneously realize the uplink and downlink communication functions of the first optical wireless device, and reduce the complexity of the optical wireless device. Improve the integration of optical wireless equipment.
在一些可能的实施例中，上述第一处理单元10包括：In some possible embodiments, the above-mentioned first processing unit 10 includes:
至少一个半透射镜；at least one semi-transmissive mirror;
其中，第一下行光信号经过至少一个半透射镜后，分成反射光信号和第二下行光信号。Wherein, the first downlink optical signal is divided into a reflected optical signal and a second downlink optical signal after passing through at least one semi-transparent mirror.
可以理解的是，利用半透射镜的透射和反射原理，使得第一下行光信号经过该至少一个半透射镜后，分成反射光信号和第二下行光信号。其中，第二下行光信号用于本实施例中的第一光无线设备自己接收，反射光信号用于反射回第二光无线设备，具体的，该反射光信号需经过调制处理得到上述上行光信号，再将该上行光信号反射回第二光无线设备，该第二光无线设备具体可以是发送上述第一下行光信号的设备。It can be understood that the transmission and reflection principle of the semi-transmissive mirror is used, so that the first downlink optical signal is divided into a reflected optical signal and a second downlink optical signal after passing through the at least one semi-transparent mirror. Wherein, the second downlink optical signal is used for the first optical wireless device in this embodiment to receive by itself, and the reflected optical signal is used for reflection back to the second optical wireless device. Specifically, the reflected optical signal needs to be modulated to obtain the above-mentioned uplink optical signal signal, and then reflect the uplink optical signal back to the second optical wireless device, and the second optical wireless device may specifically be a device that sends the above-mentioned first downlink optical signal.
通过本申请实施例，可以利用半透射镜的透射和反射原理，将接收到的第一下行光信号分成反射光信号和第二下行光信号，第二下行光信号用于实现下行通信功能，反射光信号用于实现上行通信功能，从而可以同时实现第一光无线设备上行及下行通信功能，且能降低第一光无线设备的复杂度，提高第一光无线设备的集成度。Through the embodiment of the present application, the received first downlink optical signal can be divided into a reflected optical signal and a second downlink optical signal by using the principle of transmission and reflection of a semi-transparent mirror, and the second downlink optical signal is used to realize the downlink communication function. The reflected optical signal is used to realize the uplink communication function, so that the uplink and downlink communication functions of the first optical wireless device can be realized simultaneously, the complexity of the first optical wireless device can be reduced, and the integration degree of the first optical wireless device can be improved.
在一些可能的实施例中，上述第一处理单元10还包括：In some possible embodiments, the above-mentioned first processing unit 10 further includes:
至少一个透镜；at least one lens;
其中，第一下行光信号经过至少一个透镜的入射角和上行光信号经过至少一个透镜的出射角相同。Wherein, the incident angle of the first downlink optical signal passing through the at least one lens is the same as the outgoing angle of the uplink optical signal passing through the at least one lens.
可以理解的是，第一处理单元10包括至少一个半透射镜之外，还可以包括至少一个透镜。利用透镜的透射原理，使得上述第一下行光信号经过该至少一个透镜的入射角和上述上行光信号经过该至少一个透镜的出射角相同，从而入射光(第一下行光信号)和出射光(上行光信号)形成一个完整的光通信回路，可以同时实现第一光无线设备上行及下行通信功能，且能降低第一光无线设备的复杂度，提高第一光无线设备的集成度。It can be understood that, in addition to at least one semi-transmissive mirror, the first processing unit 10 may also include at least one lens. Using the transmission principle of the lens, the incident angle of the above-mentioned first downlink optical signal passing through the at least one lens is the same as the exit angle of the above-mentioned uplink optical signal passing through the at least one lens, so that the incident light (first downlink optical signal) and the outgoing light The emitted light (uplink optical signal) forms a complete optical communication circuit, which can realize the uplink and downlink communication functions of the first optical wireless device at the same time, and can reduce the complexity of the first optical wireless device and improve the integration degree of the first optical wireless device.
在一些可能的实施例中，上述第一处理单元10还包括：In some possible embodiments, the above-mentioned first processing unit 10 further includes:
至少一个全反射镜；at least one total reflection mirror;
其中，第一下行光信号经过至少一个全反射镜的入射角和上行光信号经过至少一个全反射镜的出射角相同。Wherein, the incident angle of the first downlink optical signal passing through the at least one total reflection mirror is the same as the exit angle of the uplink optical signal passing through the at least one total reflection mirror.
可以理解的是，第一处理单元10包括至少一个半透射镜之外，还可以包括至少一个全反射透镜。利用全反射透镜的反射原理，使得上述第一下行光信号经过该至少一个全反射透镜的入射角和上述上行光信号经过该至少一个全反射透镜的出射角相同，从而入射光(第一下行光信号)和出射光(上行光信号)形成一个完整的光通信回路，可以同时实现第一光无线设备上行及下行通信功能，且能降低第一光无线设备的复杂度，提高第一光无线设备的集成度。It can be understood that, in addition to at least one semi-transmissive mirror, the first processing unit 10 may also include at least one total reflection lens. Using the reflection principle of the total reflection lens, the incident angle of the above-mentioned first downlink optical signal passing through the at least one total reflection lens is the same as the exit angle of the above-mentioned uplink optical signal passing through the at least one total reflection lens, so that the incident light (the first downlink optical signal) Uplink optical signal) and outgoing light (uplink optical signal) form a complete optical communication circuit, which can realize the uplink and downlink communication functions of the first optical wireless device at the same time, and can reduce the complexity of the first optical wireless device and improve the first optical wireless device. Integration of wireless devices.
在一些可能的实施例中，上述第一处理单元10还包括：In some possible embodiments, the above-mentioned first processing unit 10 further includes:
光调制器；light modulator;
其中，该光调制器用于对光信号进行强度调制或相位调制。Wherein, the optical modulator is used for intensity modulation or phase modulation of the optical signal.
可以理解的是，第一处理单元10包括至少一个半透射镜之外，还可以包括光调制器。该光调制器用于对光信号进行强度调制或相位调制，具体的，在入射光(第一下行光信号)经过光调制器时，光调制器根据接收到的上行电信号对该第一下行光信号进行光强度调制或相位调制等调制处理。其次，被调制后的第一下行光信号经过至少一个半透射镜，分成反射光信号和第二下行光信号，在反射光信号反射回第二光无线设备的过程中再次经过光调制器，光调制器根据接收到的上行电信号对该反射光信号进行光强度调制或相位调制等调制处理，得到上行光信号，该上行光信号再反射回第二光无线设备。It can be understood that, in addition to at least one semi-transmissive mirror, the first processing unit 10 may also include a light modulator. The optical modulator is used to perform intensity modulation or phase modulation on the optical signal. Specifically, when the incident light (first downlink optical signal) passes through the optical modulator, the optical modulator performs the first downlink optical signal according to the received uplink electrical signal. The optical signal is subjected to modulation processing such as light intensity modulation or phase modulation. Secondly, the modulated first downlink optical signal passes through at least one semi-transmissive mirror, is divided into a reflected optical signal and a second downlink optical signal, and passes through the optical modulator again in the process of reflecting the reflected optical signal back to the second optical wireless device, The optical modulator performs modulation processing such as light intensity modulation or phase modulation on the reflected optical signal according to the received uplink electrical signal to obtain an uplink optical signal, and the uplink optical signal is reflected back to the second optical wireless device.
通过本申请实施例，可以利用光调制器对入射光和出射光进行光强度调制或相位调制等调制处理，使得经过调制后的第二下行光信号有效承载下行数据，经过调制后的上行光信号有效承载上行数据，从而可以同时实现第一光无线设备上行及下行通信功能，且能降低第一光无线设备的复杂度，提高第一光无线设备的集成度。Through the embodiment of the present application, the optical modulator can be used to perform modulation processing such as light intensity modulation or phase modulation on the incident light and the outgoing light, so that the modulated second downlink optical signal effectively carries downlink data, and the modulated uplink optical signal The uplink data is effectively carried, so that the uplink and downlink communication functions of the first optical wireless device can be realized simultaneously, the complexity of the first optical wireless device can be reduced, and the integration degree of the first optical wireless device can be improved.
在一些可能的实施例中，第一收发单元20包括：In some possible embodiments, the first transceiver unit 20 includes:
荧光收集器和光电探测器；Fluorescence collectors and photodetectors;
其中，荧光收集器，用于接收上述第二下行光信号，生成荧光信号；Wherein, the fluorescence collector is configured to receive the above-mentioned second downlink optical signal and generate a fluorescence signal;
光电探测器，用于对荧光信号进行光电变化，得到电信号。The photodetector is used to photoelectrically change the fluorescent signal to obtain an electrical signal.
可以理解的是，荧光收集器用于收集第二下行光信号，激发荧光效应生成荧光信号，并将荧光信号传输至光电探测器。此处利用荧光天线对光信号入射方向不敏感、可实现大面积收光等特性，可以较好的适配大面积半透射镜，实现多种入射方向的第二下行光信号的高效率接收。光电探测器用于对接收到的荧光信号进行光电变化，得到电信号，该电信号可以作为上述第一下行电信号输出。此外，第一收发单元20除了可以通过荧光收集器和光电探测器的接收方式之外，还可以采用光电探测器阵列、高动态范围互补型金属氧化物半导体(complementary metal oxide semiconductor，CMOS)感光芯片等器件实现第二下行光信号的接收以及光电信号转化。It can be understood that the fluorescence collector is used to collect the second downlink light signal, excite the fluorescence effect to generate the fluorescence signal, and transmit the fluorescence signal to the photodetector. Here, the fluorescent antenna is not sensitive to the incident direction of the optical signal and can realize large-area light collection. It can be better adapted to a large-area semi-transmissive mirror to achieve high-efficiency reception of the second downlink optical signal in various incident directions. The photodetector is used to photoelectrically change the received fluorescent signal to obtain an electrical signal, which can be output as the above-mentioned first downlink electrical signal. In addition, the first transceiver unit 20 can also use a photodetector array, a high dynamic range complementary metal oxide semiconductor (complementary metal oxide semiconductor, CMOS) photosensitive chip in addition to the receiving method of the fluorescence collector and the photodetector. and other devices realize the reception of the second downlink optical signal and the conversion of the photoelectric signal.
通过本申请实施例，可以利用荧光收集器和光电探测器组合而成的第一收发单元，实现多种入射方向的第二下行光信号的高效率接收，并转换为第一下行电信号，从而实现下行通信功能，且能降低第一光无线设备的复杂度，提高第一光无线设备的集成度。Through the embodiment of the present application, the first transceiver unit composed of the fluorescence collector and the photodetector can be used to realize high-efficiency reception of the second downlink optical signal in various incident directions and convert it into the first downlink electrical signal, Therefore, the downlink communication function is realized, the complexity of the first optical wireless device can be reduced, and the integration degree of the first optical wireless device can be improved.
在一些可能的实施例中，第一收发单元20还包括：In some possible embodiments, the first transceiver unit 20 further includes:
合路器；Combiner;
其中，光电探测器对多个荧光信号进行光电变化后输出多个电信号；Wherein, the photodetector outputs a plurality of electrical signals after photoelectrically changing the plurality of fluorescent signals;
合路器，用于将多个电信号合并，输出上述第一下行电信号。A combiner, configured to combine multiple electrical signals to output the above-mentioned first downlink electrical signal.
可以理解的是，在第一收发单元20包括多个荧光收集器时，每个荧光收集器都会接收其对应的半透射镜透射过来的第二下行光信号，生成多个荧光信号。相应的，光电探测器对多个荧光信号进行光电变化后输出多个电信号。此时，合路器用于将该多个电信号合并，得到并输出第一下行电信号。It can be understood that, when the first transceiver unit 20 includes multiple fluorescence collectors, each fluorescence collector will receive the second downlink light signal transmitted by its corresponding semi-transparent mirror, and generate multiple fluorescence signals. Correspondingly, the photodetector outputs a plurality of electrical signals after photoelectrically changing the plurality of fluorescent signals. At this time, the combiner is used to combine the multiple electrical signals to obtain and output the first downlink electrical signal.
通过本申请实施例，可以利用合路器对多个电信号合并为一个电信号，实现第二下行光信号的高效率接收及光电变换，提高第一光无线设备的下行通信效率。Through the embodiment of the present application, a combiner can be used to combine multiple electrical signals into one electrical signal, so as to realize high-efficiency reception and photoelectric conversion of the second downlink optical signal, and improve the downlink communication efficiency of the first optical wireless device.
在一些可能的实施例中，上述第一光无线设备还包括：In some possible embodiments, the foregoing first optical wireless device further includes:
调制消除单元；Modulation cancellation unit;
其中，调制消除单元用于根据接收到的上行电信号对上述第一下行电信号进行调制消除，得到上述第二下行电信号。Wherein, the modulation and elimination unit is configured to perform modulation and elimination on the first downlink electrical signal according to the received uplink electrical signal to obtain the second downlink electrical signal.
可以理解的是，第一光无线设备包括第一处理单元10和第一收发单元20之外，第一光 无线设备还包括调制消除单元。由于在第一下行光信号经过光信号处理得到第二下行光信号的过程中，会经过光调制器，此时光调制器根据接收到的上行电信号对该第一下行光信号进行光强度调制或相位调制等调制处理，导致上行电信号引起的调制会叠加至第一下行光信号，形成同时具备下行数据和上行数据的第二下行光信号，该效应称为二次调制。相应的，由第二下行光信号进行光电变换得到的第一下行电信号也存在二次调制。第一光无线设备中的调制消除单元用于根据已知的上行电信号对第一下行电信号进行调制消除，即抵消第一下行电信号中存在的二次调制，得到第二下行电信号。It can be understood that, in addition to the first processing unit 10 and the first transceiver unit 20, the first optical wireless device also includes a modulation cancellation unit. Since the first downlink optical signal passes through the optical modulator during the process of obtaining the second downlink optical signal through optical signal processing, at this time the optical modulator measures the light intensity of the first downlink optical signal according to the received uplink electrical signal. Modulation processing such as modulation or phase modulation causes the modulation caused by the uplink electrical signal to be superimposed on the first downlink optical signal to form a second downlink optical signal with both downlink data and uplink data. This effect is called secondary modulation. Correspondingly, the first downlink electrical signal obtained through the photoelectric conversion of the second downlink optical signal also has secondary modulation. The modulation elimination unit in the first optical wireless device is used to perform modulation elimination on the first downlink electrical signal according to the known uplink electrical signal, that is, cancel the secondary modulation existing in the first downlink electrical signal, and obtain the second downlink electrical signal Signal.
通过本申请实施例，利用调制消除单元对第一下行电信号进行调制消除，抵消第一下行电信号中因上行电信号引起的二次调制，可以实现第一光无线设备上下行通信同时工作。Through the embodiment of the present application, the modulation cancellation unit is used to perform modulation cancellation on the first downlink electrical signal to cancel the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal, so that the simultaneous uplink and downlink communication of the first optical wireless device can be realized. Work.
在一些可能的实施例中，上述调制消除单元包括：In some possible embodiments, the above-mentioned modulation and elimination unit includes:
时延计算单元和信号重构单元；Delay calculation unit and signal reconstruction unit;
其中，时延计算单元用于计算目标时延，该目标时延为输入上述上行电信号到生成上述第一下行电信号之间的时延；Wherein, the time delay calculation unit is used to calculate the target time delay, and the target time delay is the time delay between inputting the above-mentioned uplink electrical signal and generating the above-mentioned first downlink electrical signal;
信号重构单元用于根据目标时延对上述第一下行电信号进行重构。The signal reconstruction unit is configured to reconstruct the above-mentioned first downlink electrical signal according to the target time delay.
可以理解的是，时延计算单元用于计算输入上行电信号到生成第一下行电信号之间的时延，记作目标时延。信号重构单元用于根据目标时延对第一下行电信号进行重构，抵消第一下行电信号中存在的时延，之后再对第一下行电信号进行调制消除。通过本申请实施例，利用时延计算单元和信号重构单元抵消第一下行电信号中存在的时延，可以实现第一光无线设备上下行通信同时工作。It can be understood that the time delay calculation unit is used to calculate the time delay between inputting the uplink electrical signal and generating the first downlink electrical signal, which is recorded as a target time delay. The signal reconstruction unit is used to reconstruct the first downlink electrical signal according to the target time delay, offset the time delay existing in the first downlink electrical signal, and then modulate and eliminate the first downlink electrical signal. Through the embodiment of the present application, the delay calculation unit and the signal reconstruction unit are used to cancel the delay existing in the first downlink electrical signal, so that the first optical wireless device can work simultaneously in uplink and downlink communication.
在一些可能的实施例中，上述时延计算单元包括：In some possible embodiments, the delay calculation unit includes:
时间数字转换器；time-to-digital converter;
其中，时间数字转换器用于计算上述目标时延。Wherein, the time-to-digital converter is used to calculate the above-mentioned target time delay.
可以理解的是，时延计算单元包括时间数字转换器，该时间数字转换器可以用于计算输入上行电信号到生成第一下行电信号之间的目标时延，输出高精度的目标时延的参数。It can be understood that the delay calculation unit includes a time-to-digital converter, which can be used to calculate the target delay between the input of the uplink electrical signal and the generation of the first downlink electrical signal, and output a high-precision target delay parameters.
在一些可能的实施例中，上述信号重构单元包括：In some possible embodiments, the above-mentioned signal reconstruction unit includes:
延时器；delayer;
其中，延时器用于根据上述目标时延对上述第一下行电信号进行重构。Wherein, the delayer is configured to reconstruct the first downlink electrical signal according to the target time delay.
可以理解的是，信号重构单元包括延时器，该延时器可以用于根据目标时延对第一下行电信号进行重构，抵消第一下行电信号中存在的时延，实现高效的下行通信。It can be understood that the signal reconstruction unit includes a delayer, which can be used to reconstruct the first downlink electrical signal according to the target time delay, offset the time delay existing in the first downlink electrical signal, and realize Efficient downlink communication.
在一些可能的实施例中，上述信号重构单元还包括：In some possible embodiments, the above-mentioned signal reconstruction unit further includes:
可调衰减器；adjustable attenuator;
其中，可调衰减器用于调节上述第一下行电信号的信号幅度。Wherein, the adjustable attenuator is used to adjust the signal amplitude of the above-mentioned first downlink electrical signal.
可以理解的是，信号重构单元包括延时器之外，信号重构单元还包括可调衰减器，该可调衰减器可以用于调节第一下行电信号的信号幅度，实现高效的下行通信。It can be understood that, in addition to the delayer, the signal reconstruction unit also includes an adjustable attenuator, which can be used to adjust the signal amplitude of the first downlink electrical signal to achieve efficient downlink communication.
在一些可能的实施例中，上述调制消除单元还包括：In some possible embodiments, the above-mentioned modulation and elimination unit further includes:
除法器；divider;
其中，除法器用于根据接收到的上述上行电信号对上述第一下行电信号进行调制消除，得到上述第二下行电信号。Wherein, the divider is configured to modulate and eliminate the first downlink electrical signal according to the received uplink electrical signal to obtain the second downlink electrical signal.
可以理解的是，调制消除单元包括时延计算单元和信号重构单元之外，调制消除单元还包括除法器，该除法器用于根据已知的上行电信号对第一下行电信号进行调制消除，即抵消第一下行电信号中存在的二次调制，得到第二下行电信号。通过本申请实施例，利用除法器 对第一下行电信号进行调制消除，抵消第一下行电信号中因上行电信号引起的二次调制，可以实现第一光无线设备上下行通信同时工作。It can be understood that, in addition to the delay calculation unit and the signal reconstruction unit, the modulation elimination unit also includes a divider, which is used to perform modulation elimination on the first downlink electrical signal according to the known uplink electrical signal , that is, cancel the secondary modulation existing in the first downlink electrical signal to obtain the second downlink electrical signal. Through the embodiment of the present application, the first downlink electrical signal is modulated and eliminated by the divider, and the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal is offset, so that the uplink and downlink communication of the first optical wireless device can work simultaneously .
在一些可能的实施例中，上述第一光无线设备还包括：In some possible embodiments, the foregoing first optical wireless device further includes:
第二处理单元；second processing unit;
其中，第二处理单元用于执行以下至少一项：Wherein, the second processing unit is used to perform at least one of the following:
发送上行电信号，该上行电信号用于对上述第一下行光信号进行信号调制，或者用于对上述第一下行电信号进行调制消除；sending an uplink electrical signal, where the uplink electrical signal is used for signal modulation of the above-mentioned first downlink optical signal, or for modulation and elimination of the above-mentioned first downlink electrical signal;
或者，接收第二下行电信号，该第二下行电信号为上述第一下行电信号经过调制消除后的电信号。Or, receiving a second downlink electrical signal, where the second downlink electrical signal is an electrical signal obtained by modulating and canceling the first downlink electrical signal.
可以理解的是，第一光无线设备包括第一处理单元10和第一收发单元20之外，第一光无线设备还包括第二处理单元。该第二处理单元可以作为发射信号处理单元，用于发送上行电信号，该上行电信号传输至第一处理单元中的光调制器，用于对第一下行光信号进行信号调制，该上行电信号还可以传输至调制消除单元，用于对第一下行电信号进行调制消除。或者，该第二处理单元还可以作为接收信号处理单元，用于接收第二下行电信号，该第二下行电信号是第一下行电信号经过调制消除后的电信号。It can be understood that, in addition to the first processing unit 10 and the first transceiver unit 20, the first optical wireless device further includes a second processing unit. The second processing unit can be used as a transmitting signal processing unit for sending an uplink electrical signal, and the uplink electrical signal is transmitted to the optical modulator in the first processing unit for signal modulation of the first downlink optical signal. The electrical signal can also be transmitted to a modulation elimination unit for performing modulation elimination on the first downlink electrical signal. Alternatively, the second processing unit may also serve as a received signal processing unit, configured to receive a second downlink electrical signal, where the second downlink electrical signal is an electrical signal after modulation and cancellation of the first downlink electrical signal.
通过本申请实施例，可以发送上行电信号或接收第二下行电信号，实现各个电信号之间的数模/模数转化以及通用的信道编码/均衡，同时实现第一光无线设备上行及下行通信功能，且能降低第一光无线设备的复杂度，提高第一光无线设备的集成度。Through the embodiment of the present application, it is possible to send an uplink electrical signal or receive a second downlink electrical signal, realize digital-to-analog/analog-to-digital conversion and general channel coding/equalization between various electrical signals, and realize the uplink and downlink of the first optical wireless device at the same time The communication function can reduce the complexity of the first optical wireless device and improve the integration degree of the first optical wireless device.
下面将结合图7至图12分别对上述图6及其多种可能的实施例的结合或变形所示的第一光无线设备的结构进行说明。The structure of the first optical wireless device shown in the combination or modification of the above-mentioned FIG. 6 and its various possible embodiments will be described respectively below with reference to FIG. 7 to FIG. 12 .
请参阅图7，图7为本申请实施例提供的另一种光无线设备的结构示意图。图7提供的光无线设备的结构可以理解为是上述图6所示的第一光无线设备的合理变形或补充。Referring to FIG. 7 , FIG. 7 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application. The structure of the optical wireless device provided in FIG. 7 can be understood as a reasonable modification or supplement to the first optical wireless device shown in FIG. 6 above.
如图7所示，第一光无线设备包括第一处理单元10和第一收发单元20。As shown in FIG. 7 , the first optical wireless device includes a first processing unit 10 and a first transceiver unit 20 .
其中，第一处理单元10包括透镜、光调制器以及半透射镜，并依次堆叠在一起组成完整的光学结构，第一处理单元10中的透镜具体可以是猫眼透镜。Wherein, the first processing unit 10 includes a lens, a light modulator, and a semi-transmissive mirror, which are sequentially stacked together to form a complete optical structure. The lens in the first processing unit 10 may specifically be a cat's-eye lens.
第一下行光信号首先穿透透镜，然后经过光调制器实现光信号调制，再经过半透射镜后分成包括第二下行光信号和反射光信号的两束光信号。第二下行光信号传递至后续的第一收发单元20，反射光信号反射过程中经过光调制器实现光信号调制，得到上行光信号，上行光信号穿透透镜传递至第二光无线设备，该第二光无线设备具体可以是发送第一下行光信号的光无线设备。The first downlink optical signal first passes through the lens, then passes through the optical modulator to realize optical signal modulation, and then is divided into two beams of optical signals including the second downlink optical signal and the reflected optical signal after passing through the semi-transmissive mirror. The second downlink optical signal is transmitted to the subsequent first transceiver unit 20. During the reflection process of the reflected optical signal, the optical signal is modulated by the optical modulator to obtain an uplink optical signal. The uplink optical signal passes through the lens and is transmitted to the second optical wireless device. The second optical wireless device may specifically be an optical wireless device that sends the first downlink optical signal.
可以理解的是，上述第二下行光信号的具体来源以及经过的主要器件依次为：透镜、光调制器、半透射镜、第一收发单元20。上述上行光信号的具体来源以及经过的主要器件依次为：透镜、光调制器、半透射镜、光调制器、透镜、第二光无线设备。It can be understood that, the specific source of the above-mentioned second downlink optical signal and the main components through which it passes are: a lens, an optical modulator, a semi-transparent mirror, and the first transceiver unit 20 . The specific source of the above-mentioned uplink optical signal and the main components through which it passes are: a lens, an optical modulator, a semi-transmissive mirror, an optical modulator, a lens, and a second optical wireless device.
此外，第一收发单元20包括荧光收集器和光电探测器。In addition, the first transceiving unit 20 includes a fluorescence collector and a photodetector.
其中，荧光收集器用于收集透过半透射镜的第二下行光信号，激发荧光效应生成荧光信号，并将荧光信号传输至光电探测器。此处利用荧光天线对光信号入射方向不敏感、可实现大面积收光等特性，可以较好的适配大面积半透射镜，实现多种入射方向的第二下行光信号的高效率接收。光电探测器用于对接收到的荧光信号进行光电变化，得到第一下行电信号。Wherein, the fluorescence collector is used to collect the second downlink optical signal transmitted through the semi-transmissive mirror, excite the fluorescence effect to generate the fluorescence signal, and transmit the fluorescence signal to the photodetector. Here, the fluorescent antenna is not sensitive to the incident direction of the optical signal and can realize large-area light collection. It can be better adapted to a large-area semi-transmissive mirror to achieve high-efficiency reception of the second downlink optical signal in various incident directions. The photodetector is used to photoelectrically change the received fluorescent signal to obtain the first downlink electrical signal.
可选的，第一收发单元20除了可以通过荧光收集器和光电探测器的接收方式之外，还可以采用光电探测器阵列、CMOS感光芯片等器件实现第二下行光信号的接收以及光电信号转化。Optionally, the first transceiver unit 20 can also use a photodetector array, a CMOS photosensitive chip and other devices to realize the reception of the second downlink optical signal and the conversion of the photoelectric signal, in addition to the receiving method of the fluorescence collector and the photodetector. .
本申请实施例中，可以利用第一处理单元10和第一收发单元20组成的一套光学结构对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号，其中，上行光信号和第二下行光信号为第一下行光信号分成的两路光信号，上行光信号用于反射回第二光无线设备，第二下行光信号用于接收并执行光电变化处理得到第一下行电信号，从而实现上行及下行通信功能，且能降低第一光无线设备的复杂度，提高第一光无线设备的集成度。In the embodiment of the present application, a set of optical structures composed of the first processing unit 10 and the first transceiver unit 20 can be used to perform optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal, wherein, The uplink optical signal and the second downlink optical signal are two optical signals divided by the first downlink optical signal, the uplink optical signal is used to reflect back to the second optical wireless device, and the second downlink optical signal is used to receive and perform photoelectric change processing to obtain The first downlink electrical signal realizes uplink and downlink communication functions, reduces the complexity of the first optical wireless device, and improves the integration degree of the first optical wireless device.
请参阅图8，图8为本申请实施例提供的另一种光无线设备的结构示意图。图8提供的光无线设备的结构可以理解为是上述图6或图7所示的第一光无线设备的合理变形或补充。Referring to FIG. 8 , FIG. 8 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application. The structure of the optical wireless device provided in FIG. 8 can be understood as a reasonable modification or supplement to the first optical wireless device shown in FIG. 6 or FIG. 7 .
如图8所示，第一光无线设备包括第一处理单元10、第一收发单元20、调制消除单元30以及第二处理单元40。As shown in FIG. 8 , the first optical wireless device includes a first processing unit 10 , a first transceiver unit 20 , a modulation cancellation unit 30 and a second processing unit 40 .
其中，第一处理单元10包括透镜、光调制器以及半透射镜，并依次堆叠在一起组成完整的光学结构，第一处理单元10中的透镜具体可以是猫眼透镜。第一收发单元20包括荧光收集器和光电探测器。Wherein, the first processing unit 10 includes a lens, a light modulator, and a semi-transmissive mirror, which are sequentially stacked together to form a complete optical structure. The lens in the first processing unit 10 may specifically be a cat's-eye lens. The first transceiving unit 20 includes a fluorescence collector and a photodetector.
在本申请实施例中，第一下行光信号经过第一处理单元10后，分别输出第二下行光信号至第一收发单元20，以及输出上行光信号至第二光无线设备，第二下行光信号经过第一收发单元20后，输出第一下行电信号，该过程的信号流向以及实现功能与上述图7中的描述一致，此处不再赘述。In the embodiment of the present application, after the first downlink optical signal passes through the first processing unit 10, the second downlink optical signal is output to the first transceiver unit 20, and the uplink optical signal is output to the second optical wireless device. After the optical signal passes through the first transceiving unit 20, the first downlink electrical signal is output. The signal flow and realized functions of this process are consistent with the description in FIG. 7 above, and will not be repeated here.
与上述图7的区别在于，本申请实施例中的第一光无线设备还包括调制消除单元30和第二处理单元40，其功能描述如下：The difference from the above-mentioned FIG. 7 is that the first optical wireless device in the embodiment of the present application also includes a modulation cancellation unit 30 and a second processing unit 40, whose functions are described as follows:
由于在第一下行光信号经过光信号处理得到第二下行光信号的过程中，会经过光调制器，此时光调制器根据第二处理单元40发送的上行电信号对该第一下行光信号进行光强度调制或相位调制等调制处理，导致上行电信号引起的调制会叠加至第一下行光信号，形成同时具备下行数据和上行数据的第二下行光信号，该效应称为二次调制。相应的，由第二下行光信号进行光电变换得到的第一下行电信号也存在二次调制。因此，需要对第一下行电信号进行调制消除。Since the first downlink optical signal passes through the optical modulator during the process of obtaining the second downlink optical signal through optical signal processing, the optical modulator at this time The signal undergoes modulation processing such as light intensity modulation or phase modulation, which causes the modulation caused by the uplink electrical signal to be superimposed on the first downlink optical signal to form a second downlink optical signal with both downlink data and uplink data. This effect is called secondary modulation. Correspondingly, the first downlink electrical signal obtained through the photoelectric conversion of the second downlink optical signal also has secondary modulation. Therefore, it is necessary to perform modulation cancellation on the first downlink electrical signal.
第一收发单元20中的光电探测器输出的第一下行电信号传输至调制消除单元30，调制消除单元30根据第二处理单元40发送的上行电信号对上述第一下行电信号进行调制消除，得到第二下行电信号，并输出该第二下行电信号至第二处理单元40进行后续的信号处理。The first downlink electrical signal output by the photodetector in the first transceiver unit 20 is transmitted to the modulation cancellation unit 30, and the modulation cancellation unit 30 modulates the first downlink electrical signal according to the uplink electrical signal sent by the second processing unit 40 cancel to obtain a second downlink electrical signal, and output the second downlink electrical signal to the second processing unit 40 for subsequent signal processing.
通过本申请实施例，利用调制消除单元对第一下行电信号进行调制消除，抵消第一下行电信号中因上行电信号引起的二次调制，可以实现第一光无线设备上下行通信同时工作。Through the embodiment of the present application, the modulation cancellation unit is used to perform modulation cancellation on the first downlink electrical signal to cancel the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal, so that the simultaneous uplink and downlink communication of the first optical wireless device can be realized. Work.
请参阅图9，图9为本申请实施例提供的另一种光无线设备的结构示意图。图9提供的光无线设备的结构可以理解为是上述图6或图7或图8所示的第一光无线设备的合理变形或补充。Referring to FIG. 9 , FIG. 9 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application. The structure of the optical wireless device provided in FIG. 9 can be understood as a reasonable modification or supplement to the first optical wireless device shown in FIG. 6 or 7 or 8 above.
如图9所示，第一光无线设备包括第一处理单元10、第一收发单元20、调制消除单元30以及第二处理单元40。As shown in FIG. 9 , the first optical wireless device includes a first processing unit 10 , a first transceiver unit 20 , a modulation cancellation unit 30 and a second processing unit 40 .
其中，第一处理单元10包括透镜、光调制器以及半透射镜，并依次堆叠在一起组成完整的光学结构，第一处理单元10中的透镜具体可以是猫眼透镜。第一收发单元20包括荧光收集器和光电探测器。调制消除单元30包括时延计算单元、信号重构单元、除法器以及多个分路器。第二处理单元40包括接收信号处理单元和发射信号处理单元。Wherein, the first processing unit 10 includes a lens, a light modulator, and a semi-transmissive mirror, which are sequentially stacked together to form a complete optical structure. The lens in the first processing unit 10 may specifically be a cat's-eye lens. The first transceiving unit 20 includes a fluorescence collector and a photodetector. The modulation elimination unit 30 includes a time delay calculation unit, a signal reconstruction unit, a divider and multiple splitters. The second processing unit 40 includes a receiving signal processing unit and a transmitting signal processing unit.
在本申请实施例中，第一处理单元10、第一收发单元20、调制消除单元30、第二处理单元40的功能以及经过上述功能单元的信号流向，与上述图8中的描述一致，此处不再赘述。In the embodiment of the present application, the functions of the first processing unit 10, the first transceiver unit 20, the modulation canceling unit 30, and the second processing unit 40, as well as the signal flow through the above functional units, are consistent with the above description in FIG. 8, here I won't repeat them here.
与上述图8的区别在于，本申请实施例给出了调制消除单元30和第二处理单元40的一 种可能的具体实现方式，其包含的功能模块的描述如下：The difference from the above-mentioned Figure 8 is that the embodiment of the present application provides a possible specific implementation of the modulation cancellation unit 30 and the second processing unit 40, and the description of the functional modules it contains is as follows:
第一收发单元20中的光电探测器输出的第一下行电信号经过分路器分别传输至调制消除单元30中的时延计算单元和除法器。第二处理单元40中的发射信号处理单元输出的上行电信号经过分路器分别传输至调制消除单元30中的时延计算单元和信号重构单元。The first downlink electrical signal output by the photodetector in the first transceiver unit 20 is respectively transmitted to the time delay calculation unit and the divider in the modulation elimination unit 30 through a splitter. The uplink electrical signal output by the transmission signal processing unit in the second processing unit 40 is respectively transmitted to the delay calculation unit and the signal reconstruction unit in the modulation elimination unit 30 through a splitter.
时延计算单元根据接收到的上行电信号和第一下行电信号，计算得到目标时延，该目标时延为发射信号处理单元向第一处理单元10中的光调制器输入上行电信号到第一收发单元20中的光电探测器生成上述第一下行电信号之间的时延，即时延计算单元接收到发射信号处理单元发送的上行电信号到接收到光电探测器发送的第一下行电信号之间的时延。时延计算单元将计算得到的目标时延传输至信号重构单元。The time delay calculation unit calculates the target time delay according to the received uplink electrical signal and the first downlink electrical signal, and the target time delay is that the transmit signal processing unit inputs the uplink electrical signal to the optical modulator in the first processing unit 10 to The time delay between the generation of the first downlink electrical signal by the photodetector in the first transceiver unit 20 is the time delay between when the delay calculation unit receives the uplink electrical signal sent by the transmitting signal processing unit and when it receives the first downlink electrical signal sent by the photodetector. Time delay between electrical signals. The time delay calculation unit transmits the calculated target time delay to the signal reconstruction unit.
信号重构单元根据接收到的目标时延和上行电信号对第一下行电信号进行重构，抵消第一下行电信号中存在的时延，并将抵消时延后的第一下行电信号传输至除法器。The signal reconstruction unit reconstructs the first downlink electrical signal according to the received target time delay and the uplink electrical signal, cancels the time delay existing in the first downlink electrical signal, and cancels the time delay of the first downlink electrical signal The electrical signal is transmitted to the divider.
除法器根据已知的上行电信号对第一下行电信号进行调制消除，即抵消第一下行电信号中存在的二次调制，得到第二下行电信号，可以实现第一光无线设备上下行通信同时工作。并输出该第二下行电信号至第二处理单元40中的接收信号处理单元进行后续的信号处理。The divider modulates and eliminates the first downlink electrical signal according to the known uplink electrical signal, that is, cancels the secondary modulation existing in the first downlink electrical signal, and obtains the second downlink electrical signal, which can realize the uplink and downlink of the first optical wireless device Line communication works at the same time. And output the second downlink electrical signal to the received signal processing unit in the second processing unit 40 for subsequent signal processing.
需要注意的是，在输出的目标时延的参数可以忽略不计的情况下，上述时延计算单元和信号重构单元可以旁路，尤其在密集紧凑的光无线终端场景中，可以使得光无线设备小型化和高集成度。此时，除法器直接根据上行电信号对光电探测器输出的第一下行电信号完成二次调制抵消处理。It should be noted that when the output target delay parameters are negligible, the above delay calculation unit and signal reconstruction unit can be bypassed, especially in dense and compact optical wireless terminal scenarios, which can make optical wireless devices Miniaturization and high integration. At this time, the divider directly performs secondary modulation and cancellation processing on the first downlink electrical signal output by the photodetector according to the uplink electrical signal.
可选的，上述调制消除单元30还可以包括可调衰减器，该可调衰减器可以用于调节第一下行电信号的信号幅度，实现高效的下行通信。Optionally, the above-mentioned modulation elimination unit 30 may further include an adjustable attenuator, which may be used to adjust the signal amplitude of the first downlink electrical signal, so as to realize efficient downlink communication.
具体的，上述时延计算单元可以是时间数字转换器，该时间数字转换器可以用于计算输入上行电信号到生成第一下行电信号之间的目标时延，输出高精度的目标时延的参数。Specifically, the above-mentioned time delay calculation unit may be a time-to-digital converter, which can be used to calculate the target time delay between the input of the uplink electrical signal and the generation of the first downlink electrical signal, and output a high-precision target time delay parameters.
具体的，上述信号重构单元可以是延时器，该延时器用于根据目标时延对第一下行电信号进行重构，抵消第一下行电信号中存在的时延，实现高效的下行通信。Specifically, the above-mentioned signal reconstruction unit may be a delayer, which is used to reconstruct the first downlink electrical signal according to the target time delay, offset the time delay existing in the first downlink electrical signal, and realize efficient downlink communication.
通过本申请实施例，利用调制消除单元对第一下行电信号进行调制消除，抵消第一下行电信号中因上行电信号引起的二次调制，可以实现第一光无线设备上下行通信同时工作。Through the embodiment of the present application, the modulation cancellation unit is used to perform modulation cancellation on the first downlink electrical signal to cancel the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal, so that the simultaneous uplink and downlink communication of the first optical wireless device can be realized. Work.
请参阅图10，图10为本申请实施例提供的又一种光无线设备的结构示意图。图10提供的光无线设备的结构可以理解为是上述图6或图7或图8或图9所示的第一光无线设备的合理变形或补充。Referring to FIG. 10 , FIG. 10 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application. The structure of the optical wireless device provided in FIG. 10 can be understood as a reasonable modification or supplement to the first optical wireless device shown in FIG. 6 or 7 or 8 or 9 above.
如图10所示，第一光无线设备包括一个半透射镜、两个全反射透镜、光调制器、荧光收集器、光电探测器、调制消除单元30以及第二处理单元40。As shown in FIG. 10 , the first optical wireless device includes a semi-transmissive mirror, two total reflection lenses, a light modulator, a fluorescence collector, a photodetector, a modulation cancellation unit 30 and a second processing unit 40 .
应理解，本申请实施例中的一个半透射镜、两个全反射透镜以及光调制器组成上述第一处理单元10，荧光收集器和光电探测器组成上述第一收发单元20。本申请实施例中的调制消除单元30以及第二处理单元40的功能描述及信号流向与上述图6或图7或图8或图9中的一致，此处不再赘述。It should be understood that, in the embodiment of the present application, one semi-transmissive mirror, two total reflection lenses and a light modulator constitute the above-mentioned first processing unit 10 , and the fluorescence collector and photodetector constitute the above-mentioned first transceiver unit 20 . The function description and signal flow direction of the modulation cancellation unit 30 and the second processing unit 40 in the embodiment of the present application are consistent with those in the above-mentioned FIG. 6 or FIG. 7 or FIG. 8 or FIG. 9 , and will not be repeated here.
其中，两个全反射透镜结合一个半透射镜相互垂直摆放，形成完整立体的反射透射光学结构，光调制器覆盖反射透射光学结构形成封闭空间，基于荧光天线的荧光收集器与半透射镜堆叠，光电探测器与荧光收集器堆叠。Among them, two total reflection lenses combined with a semi-transmissive mirror are placed vertically to form a complete three-dimensional reflective-transmissive optical structure. The light modulator covers the reflective-transmissive optical structure to form a closed space. The fluorescence collector based on the fluorescent antenna is stacked with the semi-transmissive mirror. , a photodetector stacked with a fluorescence collector.
第一下行光信号首先穿透光调制器，经过上述反射透射光学结构执行光信号处理后，生成第二下行光信号和上行光信号，第二下行光信号用于荧光收集器接收，上行光信号用于反射回第二光无线设备。The first downlink optical signal first passes through the optical modulator, and after optical signal processing is performed by the above-mentioned reflection-transmission optical structure, a second downlink optical signal and an uplink optical signal are generated. The second downlink optical signal is used for receiving by the fluorescence collector, and the uplink light The signal is used for reflection back to the second optical wireless device.
可以理解的是，上述第二下行光信号的具体来源以及经过的主要器件依次为：光调制器、反射透射光学结构、荧光收集器。上述上行光信号的具体来源以及经过的主要器件依次为：光调制器、反射透射光学结构、光调制器、第二光无线设备。It can be understood that, the specific sources of the above-mentioned second downlink optical signal and the main components passing through are: an optical modulator, a reflection-transmission optical structure, and a fluorescence collector. The specific source of the above-mentioned uplink optical signal and the main components through which it passes are: an optical modulator, a reflective-transmissive optical structure, an optical modulator, and a second optical wireless device.
此外，上述半透射镜的反射透射比可以为1:1，当半透射镜的反射透射比为1:1的时候，由第一下行光信号生成第二下行光信号和上行光信号的比例也为1:1。针对不同场景，半透射镜的反射透射比可以调整，本申请不做具体限定和约束。In addition, the reflection-transmittance ratio of the half-transmissive mirror may be 1:1. When the reflection-transmission ratio of the half-transmission mirror is 1:1, the ratio of the second downlink optical signal to the uplink optical signal generated by the first downlink optical signal is Also 1:1. For different scenarios, the reflective transmittance ratio of the semi-transmissive mirror can be adjusted, which is not specifically limited or restricted in this application.
应理解，图10为构成第一处理单元10和第一收发单元20中的各个功能单元的简易图，仅作为示例性图用于更好的理解本申请实施例中的光无线设备的结构，不应以此对本申请实施例中的光无线设备的结构构成限定。It should be understood that FIG. 10 is a simplified diagram of each functional unit constituting the first processing unit 10 and the first transceiver unit 20, which is only used as an exemplary diagram to better understand the structure of the optical wireless device in the embodiment of the present application. This should not limit the structure of the optical wireless device in the embodiment of the present application.
本申请实施例中，可以利用两个全反射透镜结合一个半透射镜相互垂直摆放，形成完整立体的反射透射光学结构，对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号，其中，上行光信号和第二下行光信号为第一下行光信号分成的两路光信号，上行光信号用于反射回第二光无线设备，第二下行光信号用于接收并执行光电变化处理得到第一下行电信号，从而实现上行及下行通信功能，且能降低第一光无线设备的复杂度，提高第一光无线设备的集成度。In the embodiment of the present application, two total reflection lenses combined with a semi-transmissive mirror can be placed perpendicular to each other to form a complete three-dimensional reflection-transmission optical structure, and optical signal processing is performed on the first downlink optical signal to obtain the uplink optical signal and the second Two downlink optical signals, wherein the uplink optical signal and the second downlink optical signal are two optical signals divided by the first downlink optical signal, the uplink optical signal is used for reflection back to the second optical wireless device, and the second downlink optical signal is used for The first downlink electrical signal is obtained by receiving and performing photoelectric change processing, so as to realize the uplink and downlink communication functions, reduce the complexity of the first optical wireless device, and improve the integration degree of the first optical wireless device.
请参阅图11，图11为本申请实施例提供的又一种光无线设备的结构示意图。图11提供的光无线设备的结构可以理解为是上述图6或图7或图8或图9或图10所示的第一光无线设备的合理变形或补充。Please refer to FIG. 11 . FIG. 11 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application. The structure of the optical wireless device provided in FIG. 11 can be understood as a reasonable modification or supplement to the first optical wireless device shown in FIG. 6 or FIG. 7 or FIG. 8 or FIG. 9 or FIG. 10 .
如图11所示，第一光无线设备包括三个半透射镜、光调制器、三个荧光收集器、三个光电探测器、合路器、调制消除单元30以及第二处理单元40。As shown in FIG. 11 , the first optical wireless device includes three semi-transmissive mirrors, an optical modulator, three fluorescence collectors, three photodetectors, a combiner, a modulation cancellation unit 30 and a second processing unit 40 .
应理解，本申请实施例中的三个半透射镜以及光调制器组成上述第一处理单元10，三个荧光收集器和三个光电探测器组成上述第一收发单元20。本申请实施例中的调制消除单元30以及第二处理单元40的功能描述及信号流向与上述图6或图7或图8或图9或图10中的一致，此处不再赘述。It should be understood that in the embodiment of the present application, three semi-transmissive mirrors and light modulators constitute the above-mentioned first processing unit 10 , and three fluorescence collectors and three photodetectors constitute the above-mentioned first transceiver unit 20 . The function description and signal flow of the modulation cancellation unit 30 and the second processing unit 40 in the embodiment of the present application are consistent with those in the above-mentioned FIG. 6 or FIG. 7 or FIG. 8 or FIG. 9 or FIG. 10 , and will not be repeated here.
其中，三个半透射镜相互垂直摆放，形成完整立体的反射透射光学结构，光调制器覆盖反射透射光学结构形成封闭空间，基于荧光天线的三个荧光收集器分别与三个半透射镜堆叠，三个光电探测器分别与三个荧光收集器堆叠。Among them, three semi-transmissive mirrors are placed perpendicular to each other to form a complete three-dimensional reflection-transmission optical structure. The light modulator covers the reflection-transmission optical structure to form a closed space. Three fluorescence collectors based on fluorescent antennas are stacked with three semi-transmission mirrors respectively. , three photodetectors are stacked with three fluorescence collectors respectively.
第一下行光信号首先穿透光调制器，经过上述反射透射光学结构执行光信号处理后，生成第二下行光信号和上行光信号，上行光信号用于反射回第二光无线设备，第二下行光信号用于荧光收集器接收，三个荧光收集器分别输出荧光信号并传输至对应的光电探测器，每个光电探测器对接收到的荧光信号进行光电变化输出电信号，此时，三个光电探测器输出的三路电信号经过合路器进行合并成一路电信号，即为上述第一下行电信号，传输至调制消除单元30。The first downlink optical signal first passes through the optical modulator, and after optical signal processing is performed by the above-mentioned reflection-transmission optical structure, a second downlink optical signal and an uplink optical signal are generated, and the uplink optical signal is used to be reflected back to the second optical wireless device. The two downlink optical signals are used for receiving by the fluorescence collectors, and the three fluorescence collectors respectively output fluorescence signals and transmit them to the corresponding photodetectors, and each photodetector performs photoelectric changes on the received fluorescence signals to output electrical signals. At this time, The three electrical signals output by the three photodetectors are combined into an electrical signal through a combiner, which is the above-mentioned first downlink electrical signal, and transmitted to the modulation elimination unit 30 .
可以理解的是，上述第二下行光信号的具体来源以及经过的主要器件依次为：光调制器、反射透射光学结构、荧光收集器。上述上行光信号的具体来源以及经过的主要器件依次为：光调制器、反射透射光学结构、光调制器、第二光无线设备。It can be understood that, the specific sources of the above-mentioned second downlink optical signal and the main components passing through are: an optical modulator, a reflection-transmission optical structure, and a fluorescence collector. The specific source of the above-mentioned uplink optical signal and the main components through which it passes are: an optical modulator, a reflective-transmissive optical structure, an optical modulator, and a second optical wireless device.
此外，上述半透射镜的反射透射比可以为4:1，当三个半透射镜的反射透射比均为4:1的时候，第一下行光信号经过三次反射透射后，生成第二下行光信号和上行光信号的比例接近1:1。针对不同场景，每个半透射镜的反射透射比可以调整，本申请不做具体限定和约束。In addition, the reflection-transmission ratio of the above-mentioned half-transmission mirrors can be 4:1. When the reflection-transmission ratios of the three half-transmission mirrors are all 4:1, the first downlink optical signal will generate the second downlink optical signal after three times of reflection and transmission. The ratio of the optical signal to the uplink optical signal is close to 1:1. For different scenarios, the reflective transmittance ratio of each semi-transparent mirror can be adjusted, which is not specifically limited or restricted in this application.
应理解，图11为构成第一处理单元10和第一收发单元20中的各个功能单元的简易图，仅作为示例性图用于更好的理解本申请实施例中的光无线设备的结构，不应以此对本申请实 施例中的光无线设备的结构构成限定。It should be understood that FIG. 11 is a simplified diagram of each functional unit constituting the first processing unit 10 and the first transceiver unit 20, which is only used as an exemplary diagram to better understand the structure of the optical wireless device in the embodiment of the present application. This should not limit the structure of the optical wireless device in the embodiment of the present application.
本申请实施例中，可以利用三个半透射镜相互垂直摆放，形成完整立体的反射透射光学结构，对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号，其中，上行光信号和第二下行光信号为第一下行光信号分成的两路光信号，上行光信号用于反射回第二光无线设备，第二下行光信号用于接收并执行光电变化处理得到第一下行电信号，从而实现上行及下行通信功能，且能降低第一光无线设备的复杂度，提高第一光无线设备的集成度。In the embodiment of the present application, three semi-transmissive mirrors can be placed perpendicular to each other to form a complete three-dimensional reflection-transmission optical structure, and optical signal processing is performed on the first downlink optical signal to obtain the uplink optical signal and the second downlink optical signal. Wherein, the uplink optical signal and the second downlink optical signal are two optical signals divided by the first downlink optical signal, the uplink optical signal is used to reflect back to the second optical wireless device, and the second downlink optical signal is used to receive and perform photoelectric changes The first downlink electrical signal is obtained through processing, thereby realizing uplink and downlink communication functions, reducing the complexity of the first optical wireless device, and improving the integration degree of the first optical wireless device.
请参阅图12，图12为本申请实施例提供的又一种光无线设备的结构示意图。图12提供的光无线设备的结构可以理解为是上述图6或图7或图8或图9或图10或图11所示的第一光无线设备的合理变形或补充。Please refer to FIG. 12 . FIG. 12 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application. The structure of the optical wireless device provided in FIG. 12 can be understood as a reasonable modification or supplement to the first optical wireless device shown in FIG. 6 or FIG. 7 or FIG. 8 or FIG. 9 or FIG. 10 or FIG. 11 .
如图12所示，第一光无线设备包括多个由上述第一处理单元和第一收发单元构成的功能模块(如由第一处理单元1和第一收发单元1构成的功能模块1、由第一处理单元2和第一收发单元2构成的功能模块2、由第一处理单元n和第一收发单元n构成的功能模块n等)、调制消除单元30以及第二处理单元40。As shown in FIG. 12 , the first optical wireless device includes a plurality of functional modules composed of the first processing unit and the first transceiver unit (such as the functional module 1 composed of the first processing unit 1 and the first transceiver unit 1, composed of The functional module 2 composed of the first processing unit 2 and the first transceiver unit 2 , the functional module n composed of the first processing unit n and the first transceiver unit n, etc.), the modulation canceling unit 30 and the second processing unit 40 .
应理解，本申请实施例中的第一处理单元n、第一收发单元n、调制消除单元30以及第二处理单元40的功能描述及信号流向与上述图6或图7或图8或图9或图10或图11中的一致，此处不再赘述。It should be understood that the functional description and signal flow of the first processing unit n, the first transceiver unit n, the modulation cancellation unit 30 and the second processing unit 40 in the embodiment of the present application are the same as those in the above-mentioned FIG. 6 or FIG. 7 or FIG. 8 or FIG. 9 Or the same as in FIG. 10 or FIG. 11 , which will not be repeated here.
本申请实施例在上述图6至图11所示实施例的基础上进行拓展，将多个第一处理单元和第一收发单元按照不同角度摆放，由1:n开关实现第一处理单元和第一收发单元的选取，具体的，当第二处理单元40通过接口tx1选取第一收发单元1时，调制消除单元30通过接口rx1选取第一处理单元1，当第二处理单元40通过接口tx2选取第一收发单元2时，调制消除单元30通过接口rx2选取第一处理单元2，当第二处理单元40通过接口txn选取第一收发单元n时，调制消除单元30通过接口rxn选取第一处理单元n。The embodiment of the present application is expanded on the basis of the above-mentioned embodiments shown in FIGS. The selection of the first transceiver unit, specifically, when the second processing unit 40 selects the first transceiver unit 1 through the interface tx1, the modulation elimination unit 30 selects the first processing unit 1 through the interface rx1, and when the second processing unit 40 selects the first processing unit 1 through the interface tx2 When the first transceiver unit 2 is selected, the modulation elimination unit 30 selects the first processing unit 2 through the interface rx2, and when the second processing unit 40 selects the first transceiver unit n through the interface txn, the modulation elimination unit 30 selects the first processing unit through the interface rxn Unit n.
通过本申请实施例，在集成上述图6至图11所示实施例所达到的技术效果的基础上，能够扩展整个光无线设备的信号接收、发射角度，从而扩大收光、反射光范围。Through the embodiment of the present application, on the basis of integrating the technical effects achieved by the above-mentioned embodiments shown in FIGS. 6 to 11 , the signal receiving and emitting angles of the entire optical wireless device can be expanded, thereby expanding the range of receiving and reflecting light.
另一方面，下面将结合图13对上述图3所示实施例中的光无线网络设备(即上述图6至图12所示实施例中的第二光无线设备)的结构进行说明。On the other hand, the structure of the optical wireless network device in the above-mentioned embodiment shown in FIG. 3 (that is, the second optical wireless device in the above-mentioned embodiment shown in FIG. 6 to FIG. 12 ) will be described below with reference to FIG. 13 .
请参阅图13，图13为本申请实施例提供的又一种光无线设备的结构示意图。Please refer to FIG. 13 . FIG. 13 is a schematic structural diagram of another optical wireless device provided by an embodiment of the present application.
如图13所示，本申请实施例所示的光无线设备包括但不限于光源、偏置器、光学前端、收发前端、调制消除单元、发射机信号处理单元以及接收机信号处理单元。为区别于上述图6至图12所示实施例中的第一光无线设备，本实施例中的光无线设备也可称为第二光无线设备。As shown in FIG. 13 , the optical wireless device shown in the embodiment of the present application includes but is not limited to a light source, a biaser, an optical front end, a transceiver front end, a modulation cancellation unit, a transmitter signal processing unit, and a receiver signal processing unit. To distinguish it from the first optical wireless device in the embodiments shown in FIGS. 6 to 12 , the optical wireless device in this embodiment may also be called a second optical wireless device.
具体的，第二光无线网络设备的光源发射下行光信号，该下行光信号根据发射机信号处理单元发送的下行电信号实现下行调制，发射机信号处理单元发送的下行电信号经过偏置器放大后传输至光源，用于对光源发射的下行光信号进行下行调制。该光源具体可以是激光器。Specifically, the light source of the second optical wireless network device emits a downlink optical signal, and the downlink optical signal realizes downlink modulation according to the downlink electrical signal sent by the transmitter signal processing unit, and the downlink electrical signal sent by the transmitter signal processing unit is amplified by the biaser Afterwards, it is transmitted to the light source for downlink modulation of the downlink optical signal emitted by the light source. Specifically, the light source may be a laser.
被下行调制后的下行光信号经过光学前端后传输至第一光无线设备。第二光无线设备的光学前端还将接收第一光无线设备发送的上行光信号，并将上行光信号传输至收发前端。The downlink optical signal after being downlink modulated is transmitted to the first optical wireless device after passing through the optical front end. The optical front end of the second optical wireless device will also receive the uplink optical signal sent by the first optical wireless device, and transmit the uplink optical signal to the transceiver front end.
收发前端可以包括荧光收集器和光电探测器(或光电探测器阵列)。其中，荧光收集器用于收集上行光信号，激发荧光效应生成荧光信号，并将荧光信号传输至光电探测器。此处利用荧光天线对光信号入射方向不敏感、可实现大面积收光等特性，可以较好的适配大面积半透射镜，实现多种入射方向的上行光信号的高效率接收。光电探测器用于对接收到的荧光信号进行光电变化，得到第一上行电信号，并输出第一上行电信号给调制消除单元。通过本申 请实施例，可以利用荧光收集器和光电探测器组合而成的收发前端，实现多种入射方向的上行光信号的高效率接收，并转换为第一上行电信号，从而实现上行通信功能。The transceiver front end may include a fluorescence collector and a photodetector (or photodetector array). Wherein, the fluorescence collector is used to collect the upstream light signal, excite the fluorescence effect to generate the fluorescence signal, and transmit the fluorescence signal to the photodetector. Here, the fluorescent antenna is not sensitive to the incident direction of the optical signal and can realize large-area light collection. It can be better adapted to a large-area semi-transmissive mirror to achieve high-efficiency reception of uplink optical signals in various incident directions. The photodetector is used to photoelectrically change the received fluorescent signal to obtain a first uplink electrical signal, and output the first uplink electrical signal to the modulation canceling unit. Through the embodiment of the present application, the transceiver front-end combined with the fluorescence collector and the photodetector can be used to realize efficient reception of uplink optical signals in various incident directions, and convert them into first uplink electrical signals, thereby realizing the uplink communication function .
由于第一下行光信号在发射之前，会根据接收到的下行电信号对该第一下行光信号进行光强度调制或相位调制等调制处理，导致下行电信号引起的调制会叠加至第一下行光信号，形成同时具备下行数据和上行数据的上行光信号，该效应称为二次调制。相应的，由上行光信号进行光电变换得到的第一上行电信号也存在二次调制。Before the first downlink optical signal is transmitted, the first downlink optical signal will be subjected to modulation processing such as light intensity modulation or phase modulation according to the received downlink electrical signal, so that the modulation caused by the downlink electrical signal will be superimposed on the first downlink optical signal. The downlink optical signal forms an uplink optical signal with both downlink data and uplink data. This effect is called secondary modulation. Correspondingly, the first uplink electrical signal obtained through photoelectric conversion of the uplink optical signal also has secondary modulation.
因此，调制消除单元接收该第一上行电信号和发射机信号处理单元输出的下行电信号，并基于下行电信号，对第一上行电信号进行调制消除，即抵消第一上行电信号中存在的二次调制，得到第二上行电信号，输出处理后的第二上行电信号给接收机信号处理单元，进行后续信号处理。通过本申请实施例，利用调制消除单元对第一上行电信号进行调制消除，抵消第一上行电信号中因下行电信号引起的二次调制，可以实现第二光无线设备上下行通信同时工作。Therefore, the modulation and elimination unit receives the first uplink electrical signal and the downlink electrical signal output by the transmitter signal processing unit, and based on the downlink electrical signal, performs modulation and cancellation on the first uplink electrical signal, that is, cancels the first uplink electrical signal. The second modulation is performed to obtain the second uplink electrical signal, and the processed second uplink electrical signal is output to the receiver signal processing unit for subsequent signal processing. Through the embodiment of the present application, the modulation canceling unit is used to cancel the modulation of the first uplink electrical signal to cancel the secondary modulation caused by the downlink electrical signal in the first uplink electrical signal, so that the uplink and downlink communication of the second optical wireless device can work simultaneously.
具体的，调制消除单元可以包括时延计算单元和信号重构单元。Specifically, the modulation elimination unit may include a delay calculation unit and a signal reconstruction unit.
其中，时延计算单元用于计算输入下行电信号到生成第一上行电信号之间的时延，记作目标时延。信号重构单元用于根据目标时延对第一上行电信号进行重构，抵消第一上行电信号中存在的时延，之后再对第一上行电信号进行调制消除。通过本申请实施例，利用时延计算单元和信号重构单元抵消第一上行电信号中存在的时延，可以实现第二光无线设备上下行通信同时工作。Wherein, the time delay calculation unit is used to calculate the time delay between the input of the downlink electrical signal and the generation of the first uplink electrical signal, which is recorded as the target time delay. The signal reconstruction unit is used to reconstruct the first uplink electrical signal according to the target time delay, offset the time delay existing in the first uplink electrical signal, and then modulate and eliminate the first uplink electrical signal. Through the embodiment of the present application, the delay calculation unit and the signal reconstruction unit are used to cancel the delay existing in the first uplink electrical signal, so that the second optical wireless device can work simultaneously in uplink and downlink communication.
具体的，上述时延计算单元包括时间数字转换器。该时间数字转换器可以用于计算输入下行电信号到生成第一上行电信号之间的目标时延，输出高精度的目标时延的参数。Specifically, the delay calculation unit includes a time-to-digital converter. The time-to-digital converter can be used to calculate the target time delay between the input of the downlink electrical signal and the generation of the first uplink electrical signal, and output high-precision parameters of the target time delay.
具体的，上述信号重构单元包括延时器。该延时器可以用于根据目标时延对第一上行电信号进行重构，抵消第一上行电信号中存在的时延，实现高效的上行通信。Specifically, the above-mentioned signal reconstruction unit includes a delayer. The delayer can be used to reconstruct the first uplink electrical signal according to the target time delay, offset the time delay existing in the first uplink electrical signal, and realize efficient uplink communication.
可选的，上述信号重构单元包括延时器之外，信号重构单元还可以包括可调衰减器。该可调衰减器可以用于调节第一上行电信号的信号幅度，实现高效的上行通信。Optionally, in addition to the delayer, the signal reconstruction unit may also include an adjustable attenuator. The adjustable attenuator can be used to adjust the signal amplitude of the first uplink electrical signal to realize efficient uplink communication.
具体的，上述调制消除单元包括时延计算单元和信号重构单元之外，调制消除单元还可以包括除法器。该除法器用于根据已知的下行电信号对第一上行电信号进行调制消除，即抵消第一上行电信号中存在的二次调制，得到第二上行电信号。通过本申请实施例，利用除法器对第一上行电信号进行调制消除，抵消第一上行电信号中因下行电信号引起的二次调制，可以实现第二光无线设备上下行通信同时工作。Specifically, in addition to the above-mentioned modulation elimination unit including the delay calculation unit and the signal reconstruction unit, the modulation elimination unit may also include a divider. The divider is used to perform modulation and elimination on the first uplink electrical signal according to the known downlink electrical signal, that is, cancel the secondary modulation existing in the first uplink electrical signal, and obtain the second uplink electrical signal. Through the embodiment of the present application, the first uplink electrical signal is modulated and eliminated by the divider, and the secondary modulation caused by the downlink electrical signal in the first uplink electrical signal is canceled out, so that the second optical wireless device can work simultaneously for uplink and downlink communication.
基于上述图6至图12所示实施例中的第一光无线设备(光无线终端设备)和上述图13所示实施例中的第二光无线设备(光无线网络设备)，本申请还提供了相应的光无线通信方法，通过对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号，其中，上行光信号和第二下行光信号为第一下行光信号分成的两路光信号，上行光信号用于反射回第二光无线设备，第二下行光信号用于接收并执行光电变化处理得到第一下行电信号，从而实现上行及下行通信功能，且能降低光无线设备的复杂度，提高光无线设备的集成度。Based on the first optical wireless device (optical wireless terminal device) in the embodiment shown in above-mentioned Fig. 6 to Fig. 12 and the second optical wireless device (optical wireless network device) in the above-mentioned embodiment shown in Fig. 13, the present application also provides A corresponding optical wireless communication method is proposed, by performing optical signal processing on the first downlink optical signal, an uplink optical signal and a second downlink optical signal are obtained, wherein the uplink optical signal and the second downlink optical signal are the first downlink optical signal Divided into two optical signals, the uplink optical signal is used to reflect back to the second optical wireless device, the second downlink optical signal is used to receive and perform photoelectric change processing to obtain the first downlink electrical signal, thereby realizing uplink and downlink communication functions, and The complexity of the optical wireless equipment can be reduced, and the integration degree of the optical wireless equipment can be improved.
下面将结合图14至图19对本申请提供的光无线通信方法进行说明。The optical wireless communication method provided by the present application will be described below with reference to FIG. 14 to FIG. 19 .
请参阅图14，图14为本申请实施例提供的一种通信方法的流程示意图，该通信方法应用于光通信技术领域。Please refer to FIG. 14 . FIG. 14 is a schematic flowchart of a communication method provided by an embodiment of the present application. The communication method is applied in the technical field of optical communication.
如图14所示，本申请实施例的通信方法应用的通信系统包括但不限于第一光无线设备和第二光无线设备。As shown in FIG. 14 , the communication system to which the communication method according to the embodiment of the present application is applied includes but is not limited to a first optical wireless device and a second optical wireless device.
如图14所示，本申请实施例的通信方法可以包括步骤S1401、S1402、S1403、S1404以 及S1405，其中，步骤S1401、S1402、S1403、S1404以及S1405的执行顺序，本申请实施例对此不作限制，具体的，该通信方法包括但不限于如下步骤：As shown in Figure 14, the communication method of the embodiment of the present application may include steps S1401, S1402, S1403, S1404, and S1405, wherein, the execution sequence of steps S1401, S1402, S1403, S1404, and S1405 is not limited by this embodiment of the present application , specifically, the communication method includes but is not limited to the following steps:
步骤S1401：第二光无线设备向第一光无线设备发送第一下行光信号。Step S1401: the second optical wireless device sends a first downlink optical signal to the first optical wireless device.
第二光无线设备向第一光无线设备发送第一下行光信号，相应的，第一光无线设备接收第二光无线设备发送的第一下行光信号。The second optical wireless device sends the first downlink optical signal to the first optical wireless device, and correspondingly, the first optical wireless device receives the first downlink optical signal sent by the second optical wireless device.
本申请实施例中的第二光无线设备为搭载了可用于执行计算机执行指令的处理器的设备，可以是如基站之类的网络设备，具体还可以是如上述图5至图13所示实施例中的光无线网络设备。本申请实施例中的第一光无线设备为搭载了可用于执行计算机执行指令的处理器的设备，可以是如UE之类的终端设备，具体还可以是如上述图5至图13所示实施例中的光无线终端设备。The second optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and may be a network device such as a base station. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above. Optical wireless network equipment in the example. The first optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and it may be a terminal device such as a UE. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above. Examples of optical wireless terminal equipment.
步骤S1402：第一光无线设备对第一下行光信号执行光信号处理，得到第二下行光信号和上行光信号。Step S1402: the first optical wireless device performs optical signal processing on the first downlink optical signal to obtain a second downlink optical signal and an uplink optical signal.
第一光无线设备对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号。可以理解为，第一下行光信号经过光信号处理后分成了上行光信号和第二下行光信号的至少两路光信号，其中，上行光信号用于反射回第二光无线设备，第二下行光信号由本实施例中的第一光无线设备自己接收。The first optical wireless device performs optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal. It can be understood that, after optical signal processing, the first downlink optical signal is divided into at least two optical signals of an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal is used for reflection back to the second optical wireless device, and the second The downlink optical signal is received by the first optical wireless device in this embodiment itself.
需要注意的是，第一下行光信号经过光信号处理后分成的上行光信号和第二下行光信号的比例可以针对不同场景进行调整，本申请不做具体限定和约束。It should be noted that the ratio of the first downlink optical signal into the uplink optical signal and the second downlink optical signal after optical signal processing can be adjusted according to different scenarios, which is not specifically limited or restricted in this application.
在一种可能的实施方式中，第一光无线设备还可以根据上行电信号对第一下行光信号进行光强度调制或相位调制等调制处理。其次，再对被调制后的第一下行光信号执行光信号处理，分成反射光信号和第二下行光信号，第二下行光信号由本实施例中的第一光无线设备自己接收。然后根据上行电信号对该反射光信号进行光强度调制或相位调制等调制处理，得到上行光信号，该上行光信号再反射回第二光无线设备。In a possible implementation manner, the first optical wireless device may also perform modulation processing such as optical intensity modulation or phase modulation on the first downlink optical signal according to the uplink electrical signal. Secondly, optical signal processing is performed on the modulated first downlink optical signal, and divided into a reflected optical signal and a second downlink optical signal, and the second downlink optical signal is received by the first optical wireless device in this embodiment itself. Then perform modulation processing such as light intensity modulation or phase modulation on the reflected optical signal according to the uplink electrical signal to obtain an uplink optical signal, and then reflect the uplink optical signal back to the second optical wireless device.
通过本申请实施例，可以对光信号进行强度调制或相位调制等调制处理，使得经过调制后的第二下行光信号有效承载下行数据，经过调制后的上行光信号有效承载上行数据，从而可以同时实现第一光无线设备上行及下行通信功能。Through the embodiment of the present application, modulation processing such as intensity modulation or phase modulation can be performed on the optical signal, so that the modulated second downlink optical signal can effectively carry the downlink data, and the modulated uplink optical signal can effectively carry the uplink data, thereby simultaneously Realize the uplink and downlink communication functions of the first optical wireless equipment.
步骤S1403：第一光无线设备向第二光无线设备发送上行光信号。Step S1403: the first optical wireless device sends an uplink optical signal to the second optical wireless device.
第一光无线设备向第二光无线设备发送上行光信号，相应的，第二光无线设备接收第一光无线设备发送的上行光信号。The first optical wireless device sends an uplink optical signal to the second optical wireless device, and correspondingly, the second optical wireless device receives the uplink optical signal sent by the first optical wireless device.
步骤S1404：第一光无线设备对第二下行光信号执行光电变化处理，得到第一下行电信号。Step S1404: the first optical wireless device performs photoelectric change processing on the second downlink optical signal to obtain the first downlink electrical signal.
具体可以是，第一光无线设备根据接收到的第二下行光信号生成荧光信号，再对荧光信号进行光电变化，得到第一下行电信号。Specifically, the first optical wireless device generates a fluorescent signal according to the received second downlink optical signal, and then performs photoelectric changes on the fluorescent signal to obtain the first downlink electrical signal.
可选的，在根据接收到的第二下行光信号生成多个荧光信号的情况下，对多个荧光信号进行光电变化，得到多个电信号，再将多个电信号合并，得到第一下行电信号。Optionally, in the case where multiple fluorescent signals are generated according to the received second downlink optical signal, photoelectric changes are performed on the multiple fluorescent signals to obtain multiple electrical signals, and then the multiple electrical signals are combined to obtain the first downlink optical signal. line electrical signal.
通过本申请实施例，可以利用荧光效应，实现多种入射方向的第二下行光信号的高效率接收，并转换为第一下行电信号，从而实现下行通信功能。Through the embodiments of the present application, the fluorescent effect can be used to efficiently receive the second downlink optical signals in various incident directions and convert them into first downlink electrical signals, thereby realizing the downlink communication function.
此外，第一光无线设备还将对第一下行电信号进行调制消除，得到第二下行电信号。In addition, the first optical wireless device will also perform modulation and cancellation on the first downlink electrical signal to obtain the second downlink electrical signal.
由于在第一下行光信号经过光信号处理得到第二下行光信号的过程中，会根据上行电信号对该第一下行光信号进行光强度调制或相位调制等调制处理，导致上行电信号引起的调制会叠加至第一下行光信号，形成同时具备下行数据和上行数据的第二下行光信号，该效应称 为二次调制。相应的，由第二下行光信号进行光电变换得到的第一下行电信号也存在二次调制。Because in the process of obtaining the second downlink optical signal through optical signal processing on the first downlink optical signal, the first downlink optical signal will be modulated according to the uplink electrical signal such as light intensity modulation or phase modulation, resulting in the uplink electrical signal The resulting modulation will be superimposed on the first downlink optical signal to form a second downlink optical signal with both downlink data and uplink data. This effect is called secondary modulation. Correspondingly, the first downlink electrical signal obtained through the photoelectric conversion of the second downlink optical signal also has secondary modulation.
此时，第一光无线设备将根据已知的上行电信号对第一下行电信号进行调制消除，即抵消第一下行电信号中存在的二次调制，得到第二下行电信号。At this time, the first optical wireless device modulates and eliminates the first downlink electrical signal according to the known uplink electrical signal, that is, cancels the secondary modulation existing in the first downlink electrical signal, and obtains the second downlink electrical signal.
具体的，第一光无线设备可以计算输入上行电信号到生成第一下行电信号之间的时延，记作目标时延，然后根据目标时延对第一下行电信号进行重构，抵消第一下行电信号中存在的时延，之后再对第一下行电信号进行调制消除，得到第二下行电信号。Specifically, the first optical wireless device may calculate the time delay between inputting the uplink electrical signal and generating the first downlink electrical signal, and record it as the target time delay, and then reconstruct the first downlink electrical signal according to the target time delay, The time delay existing in the first downlink electrical signal is canceled out, and then the first downlink electrical signal is modulated and eliminated to obtain a second downlink electrical signal.
通过本申请实施例，对第一下行电信号进行调制消除，抵消第一下行电信号中因上行电信号引起的二次调制，可以实现第一光无线设备上下行通信同时工作。Through the embodiment of the present application, the first downlink electrical signal is modulated and eliminated, and the secondary modulation caused by the uplink electrical signal in the first downlink electrical signal is canceled out, so that the first optical wireless device can work simultaneously in uplink and downlink communication.
步骤S1405：第二光无线设备对上行光信号执行光电变化处理，得到第一上行电信号。Step S1405: the second optical wireless device performs photoelectric change processing on the uplink optical signal to obtain the first uplink electrical signal.
具体可以是，第二光无线设备根据接收到的上行光信号生成荧光信号，再对荧光信号进行光电变化，得到第一上行电信号。Specifically, the second optical wireless device generates a fluorescent signal according to the received uplink optical signal, and then performs photoelectric changes on the fluorescent signal to obtain the first uplink electrical signal.
通过本申请实施例，可以利用荧光效应，实现多种入射方向的上行光信号的高效率接收，并转换为第一上行电信号，从而实现上行通信功能。Through the embodiments of the present application, the fluorescence effect can be used to realize high-efficiency reception of uplink optical signals in various incident directions and convert them into first uplink electrical signals, thereby realizing an uplink communication function.
此外，第二光无线设备还将对第一上行电信号进行调制消除，得到第二上行电信号。In addition, the second optical wireless device will also perform modulation and cancellation on the first uplink electrical signal to obtain a second uplink electrical signal.
由于第一下行光信号在发射之前，会根据接收到的下行电信号对该第一下行光信号进行光强度调制或相位调制等调制处理，导致下行电信号引起的调制会叠加至第一下行光信号，形成同时具备下行数据和上行数据的上行光信号，该效应称为二次调制。相应的，由上行光信号进行光电变换得到的第一上行电信号也存在二次调制。Before the first downlink optical signal is transmitted, the first downlink optical signal will be subjected to modulation processing such as light intensity modulation or phase modulation according to the received downlink electrical signal, so that the modulation caused by the downlink electrical signal will be superimposed on the first downlink optical signal. The downlink optical signal forms an uplink optical signal with both downlink data and uplink data. This effect is called secondary modulation. Correspondingly, the first uplink electrical signal obtained through photoelectric conversion of the uplink optical signal also has secondary modulation.
此时，第二光无线设备将根据已知的下行电信号对第一上行电信号进行调制消除，即抵消第一上行电信号中存在的二次调制，得到第二下行电信号。At this time, the second optical wireless device modulates and eliminates the first uplink electrical signal according to the known downlink electrical signal, that is, cancels the secondary modulation existing in the first uplink electrical signal, and obtains the second downlink electrical signal.
具体的，第二光无线设备可以先计算输入下行电信号到生成第一上行电信号之间的时延，记作目标时延，然后根据目标时延对第一上行电信号进行重构，抵消第一上行电信号中存在的时延，之后再对第一上行电信号进行调制消除，得到第二下行电信号。Specifically, the second optical wireless device may first calculate the delay between the input of the downlink electrical signal and the generation of the first uplink electrical signal, and record it as the target delay, and then reconstruct the first uplink electrical signal according to the target delay to offset The time delay existing in the first uplink electrical signal is then modulated and eliminated to obtain the second downlink electrical signal.
通过本申请实施例，对第一上行电信号进行调制消除，抵消第一上行电信号中因下行电信号引起的二次调制，可以实现第二光无线设备上下行通信同时工作。Through the embodiment of the present application, the first uplink electrical signal is modulated and eliminated, and the secondary modulation caused by the downlink electrical signal in the first uplink electrical signal is canceled out, so that the second optical wireless device can work simultaneously for uplink and downlink communication.
请参阅图15，图15为本申请实施例提供的另一种通信方法的流程示意图，也可以理解为是上述图14中的通信方法流程图的变形或补充。Please refer to FIG. 15 . FIG. 15 is a schematic flow chart of another communication method provided by an embodiment of the present application, which can also be understood as a modification or supplement to the flow chart of the communication method in FIG. 14 above.
如图15所示，本申请实施例的通信方法应用的通信系统包括但不限于第一光无线设备和第二光无线设备。As shown in FIG. 15 , the communication system to which the communication method according to the embodiment of the present application is applied includes but is not limited to a first optical wireless device and a second optical wireless device.
如图15所示，本申请实施例的通信方法可以包括步骤S1501、S1502、S1503、S1504、S1505以及S1506，其中，步骤S1501、S1502、S1503、S1504、S1505以及S1506的执行顺序，本申请实施例对此不作限制，具体的，该通信方法包括但不限于如下步骤：As shown in Figure 15, the communication method of the embodiment of the present application may include steps S1501, S1502, S1503, S1504, S1505, and S1506, wherein, the execution sequence of steps S1501, S1502, S1503, S1504, S1505, and S1506, There is no limit to this, specifically, the communication method includes but is not limited to the following steps:
步骤S1501：第二光无线设备向第一光无线设备发送定位信号。Step S1501: the second optical wireless device sends a positioning signal to the first optical wireless device.
第二光无线设备向第一光无线设备发送定位信号，相应的，第一光无线设备接收第二光无线设备发送的定位信号。此时的第一光无线设备不发射上行信号。The second optical wireless device sends a positioning signal to the first optical wireless device, and correspondingly, the first optical wireless device receives the positioning signal sent by the second optical wireless device. At this time, the first optical wireless device does not transmit an uplink signal.
其中，该定位信号可以是脉冲信号、调频连续波(frequency modulated continuous wave，FMCW)信号、超宽带(Ultra-Wideband，UWB)信号、开关键控调制格式(On-Off Key，OOK)信号等，用于测量第一光无线设备与第二光无线设备之间的距离信息。Wherein, the positioning signal may be a pulse signal, a frequency modulated continuous wave (frequency modulated continuous wave, FMCW) signal, an ultra-wideband (Ultra-Wideband, UWB) signal, an on-off key modulation format (On-Off Key, OOK) signal, etc., It is used for measuring distance information between the first optical wireless device and the second optical wireless device.
本申请实施例中的第二光无线设备为搭载了可用于执行计算机执行指令的处理器的设备，可以是如基站之类的网络设备，具体还可以是如上述图5至图13所示实施例中的光无线网络 设备。本申请实施例中的第一光无线设备为搭载了可用于执行计算机执行指令的处理器的设备，可以是如UE之类的终端设备，具体还可以是如上述图5至图13所示实施例中的光无线终端设备。The second optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and may be a network device such as a base station. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above. Optical wireless network equipment in the example. The first optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and it may be a terminal device such as a UE. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above. Examples of optical wireless terminal equipment.
步骤S1502：第二光无线设备确定调制消除参数。Step S1502: the second optical wireless device determines a modulation cancellation parameter.
第二光无线设备根据定位信号所测量得到的第一光无线设备与第二光无线设备之间的距离信息，确定调制消除参数。The second optical wireless device determines the modulation elimination parameter according to the distance information between the first optical wireless device and the second optical wireless device measured by the positioning signal.
其中，该调制消除参数为第二光无线设备对上行光信号进行调制消除的参数，该调制消除参数用于第二光无线设备与第一光无线设备数据传输时，对上行光信号进行调制消除，从而实现上下行通信同时工作。Wherein, the modulation elimination parameter is a parameter for the second optical wireless device to modulate and eliminate the uplink optical signal, and the modulation elimination parameter is used to perform modulation and elimination on the uplink optical signal when the second optical wireless device communicates with the first optical wireless device. , so as to realize the simultaneous work of uplink and downlink communication.
步骤S1503：第二光无线设备向第一光无线设备发送通信请求。Step S1503: the second optical wireless device sends a communication request to the first optical wireless device.
第二光无线设备在确定了对上行光信号进行调制消除的参数之后，第二光无线设备向第一光无线设备发送通信请求，用于请求与第一光无线设备进行数据传输。相应的，第一光无线设备接收第二光无线设备发送的通信请求。此时的第二光无线设备仅输出不承载任何调制的光载波。After the second optical wireless device determines the parameters for performing modulation and cancellation on the uplink optical signal, the second optical wireless device sends a communication request to the first optical wireless device for requesting data transmission with the first optical wireless device. Correspondingly, the first optical wireless device receives the communication request sent by the second optical wireless device. At this time, the second optical wireless device only outputs an optical carrier that does not carry any modulation.
步骤S1504：第一光无线设备确定调制消除参数，打开收发功能。Step S1504: the first optical wireless device determines the modulation cancellation parameter, and enables the sending and receiving function.
第一光无线设备在接收到第二光无线设备发送的通信请求后，确定调制消除参数，并打开收发功能，准备与第二光无线设备进行数据传输，即执行上述图14中的通信方法。After receiving the communication request sent by the second optical wireless device, the first optical wireless device determines the modulation cancellation parameters, and turns on the transceiver function, and prepares for data transmission with the second optical wireless device, that is, executes the communication method in FIG. 14 above.
其中，该调制消除参数为第一光无线设备对第一下行电信号进行调制消除的参数，该调制消除参数用于第一光无线设备与第二光无线设备数据传输时，对第一下行电信号进行调制消除，从而实现上下行通信同时工作。Wherein, the modulation elimination parameter is a parameter for the first optical wireless device to modulate and eliminate the first downlink electrical signal, and the modulation elimination parameter is used for data transmission between the first optical wireless device and the second optical wireless device. The upstream and downstream electrical signals are modulated and eliminated, so as to realize the simultaneous operation of uplink and downlink communications.
步骤S1505：第一光无线设备向第二光无线设备发送应答消息。Step S1505: the first optical wireless device sends a response message to the second optical wireless device.
第一光无线设备除了确定调制消除参数，打开收发功能之外，还将响应于该通信请求，同时向第二光无线设备发送应答消息。相应的，第二光无线设备接收第一光无线设备发送的应答消息。In addition to determining the modulation cancellation parameters and enabling the transceiver function, the first optical wireless device will simultaneously send a response message to the second optical wireless device in response to the communication request. Correspondingly, the second optical wireless device receives the response message sent by the first optical wireless device.
步骤S1506：第二光无线设备打开收发功能。Step S1506: the second optical wireless device turns on the sending and receiving function.
第二光无线设备接收到该通信请求对应的应答消息后，打开收发功能，准备与第一光无线设备进行数据传输，即执行上述图14中的通信方法。After receiving the response message corresponding to the communication request, the second optical wireless device turns on the sending and receiving function, and prepares to perform data transmission with the first optical wireless device, that is, executes the communication method in FIG. 14 above.
本申请实施例中的通信方法应用于第一光无线设备和第二光无线设备进行数据传输之前的初始化阶段，通过定位信号确定第二光无线设备的调制消除参数，通过通信请求与应答消息确定第一光无线设备的调制消除参数，并打开各自的收发功能，为后续的数据传输做准备，实现上下行通信同时工作，提高通信效率。The communication method in the embodiment of the present application is applied to the initialization stage before the data transmission between the first optical wireless device and the second optical wireless device, and the modulation and elimination parameters of the second optical wireless device are determined through the positioning signal, and determined through the communication request and response message The modulation and elimination parameters of the first optical wireless equipment, and open their respective transceiver functions to prepare for the subsequent data transmission, realize simultaneous work of uplink and downlink communication, and improve communication efficiency.
请参阅图16，图16为本申请实施例提供的另一种通信方法的流程示意图，也可以理解为是上述图14或图15中的通信方法流程图的变形或补充。Please refer to FIG. 16 . FIG. 16 is a schematic flow chart of another communication method provided by the embodiment of the present application, which can also be understood as a modification or supplement to the flow chart of the communication method in FIG. 14 or FIG. 15 above.
如图16所示，本申请实施例的通信方法应用的通信系统包括但不限于第一光无线设备和第二光无线设备。As shown in FIG. 16 , the communication system to which the communication method according to the embodiment of the present application is applied includes but is not limited to a first optical wireless device and a second optical wireless device.
如图16所示，本申请实施例的通信方法可以包括步骤S1601、S1602以及S1603，其中，步骤S1601、S1602以及S1603的执行顺序，本申请实施例对此不作限制，具体的，该通信方法包括但不限于如下步骤：As shown in Figure 16, the communication method of the embodiment of the present application may include steps S1601, S1602, and S1603, wherein the execution sequence of steps S1601, S1602, and S1603 is not limited by the embodiment of the present application. Specifically, the communication method includes But not limited to the following steps:
步骤S1601：第一光无线设备检测到满足校准条件，触发校准机制。Step S1601: the first optical wireless device detects that a calibration condition is satisfied, and triggers a calibration mechanism.
第一光无线设备检测到满足校准条件，触发校准机制。The first optical wireless device detects that a calibration condition is met, and triggers a calibration mechanism.
其中，校准条件包括但不限于：第二光无线设备与第一光无线设备之间的距离发送变化， 第一下行光信号或上行光信号的传输速率降低，误码率升高等。第一光无线设备触发校准机制后，将停止向第二光无线设备发送上行数据。Wherein, the calibration conditions include but are not limited to: the transmission distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or uplink optical signal decreases, and the bit error rate increases. After the first optical wireless device triggers the calibration mechanism, it stops sending uplink data to the second optical wireless device.
本申请实施例中的第二光无线设备为搭载了可用于执行计算机执行指令的处理器的设备，可以是如基站之类的网络设备，具体还可以是如上述图5至图13所示实施例中的光无线网络设备。本申请实施例中的第一光无线设备为搭载了可用于执行计算机执行指令的处理器的设备，可以是如UE之类的终端设备，具体还可以是如上述图5至图13所示实施例中的光无线终端设备。The second optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and may be a network device such as a base station. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above. Optical wireless network equipment in the example. The first optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and it may be a terminal device such as a UE. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above. Examples of optical wireless terminal equipment.
步骤S1602：第一光无线设备向第二光无线设备发送校准请求。Step S1602: the first optical wireless device sends a calibration request to the second optical wireless device.
第一光无线设备触发校准机制的同时，还将向第二光无线设备发送校准请求，用于请求第二光无线设备更新对上行光信号进行调制消除的参数。相应的，第二光无线设备接收第一光无线设备发送的校准请求。When the first optical wireless device triggers the calibration mechanism, it will also send a calibration request to the second optical wireless device, which is used to request the second optical wireless device to update parameters for performing modulation cancellation on the uplink optical signal. Correspondingly, the second optical wireless device receives the calibration request sent by the first optical wireless device.
此外，第一光无线设备还将向第二光无线设备发送下行数据停发指示，用于指示第二光无线设备停止向第一光无线设备发送下行数据。相应的，第二光无线设备接收第一光无线设备发送的下行数据停发指示。In addition, the first optical wireless device will also send a downlink data stop indication to the second optical wireless device, for instructing the second optical wireless device to stop sending downlink data to the first optical wireless device. Correspondingly, the second optical wireless device receives the downlink data stop sending instruction sent by the first optical wireless device.
步骤S1603：第二光无线设备启动校准机制。Step S1603: the second optical wireless device starts a calibration mechanism.
第二光无线设备在接收到第一光无线设备发送的校准请求后，启动校准机制。主要包括停止与第一光无线设备之间的数据传输，更新对上行光信号进行调制消除的参数。After receiving the calibration request sent by the first optical wireless device, the second optical wireless device starts a calibration mechanism. It mainly includes stopping the data transmission with the first optical wireless device, and updating the parameters for performing modulation and elimination on the uplink optical signal.
可以理解的是，在第二光无线设备完成校准之后，将重新进入初始化阶段，即执行上述图15中的通信方法。It can be understood that after the second optical wireless device completes the calibration, it will re-enter the initialization phase, that is, execute the communication method in FIG. 15 above.
通过本申请实施例，可以及时更新对上行光信号进行调制消除的参数，保障第一光无线设备与第二光无线设备之间建立稳定可靠的通信链路，提高高速通信应用场景下的稳定性，从而实现上下行通信同时工作，提高上下行通信效率。Through the embodiment of the present application, the parameters for modulating and eliminating the uplink optical signal can be updated in time, ensuring the establishment of a stable and reliable communication link between the first optical wireless device and the second optical wireless device, and improving the stability in high-speed communication application scenarios , so as to realize simultaneous operation of uplink and downlink communication, and improve uplink and downlink communication efficiency.
请参阅图17，图17为本申请实施例提供的另一种通信方法的流程示意图，也可以理解为是上述图14或图15或图16中的通信方法流程图的变形或补充。Please refer to FIG. 17 . FIG. 17 is a schematic flow chart of another communication method provided by the embodiment of the present application, which can also be understood as a modification or supplement to the flow chart of the communication method in FIG. 14 , FIG. 15 , or FIG. 16 .
如图17所示，本申请实施例的通信方法应用的通信系统包括但不限于第一光无线设备和第二光无线设备。As shown in FIG. 17 , the communication system to which the communication method according to the embodiment of the present application is applied includes but is not limited to a first optical wireless device and a second optical wireless device.
如图17所示，本申请实施例的通信方法可以包括步骤S1701、S1702以及S1703，其中，步骤S1701、S1702以及S1703的执行顺序，本申请实施例对此不作限制，具体的，该通信方法包括但不限于如下步骤：As shown in Figure 17, the communication method of this embodiment of the application may include steps S1701, S1702, and S1703, wherein the execution order of steps S1701, S1702, and S1703 is not limited by this embodiment of this application. Specifically, the communication method includes But not limited to the following steps:
步骤S1701：第二光无线设备检测到满足校准条件，触发校准机制。Step S1701: the second optical wireless device detects that a calibration condition is satisfied, and triggers a calibration mechanism.
第二光无线设备检测到满足校准条件，触发校准机制。The second optical wireless device detects that the calibration condition is met, and triggers a calibration mechanism.
其中，校准条件包括但不限于：第二光无线设备与第一光无线设备之间的距离发送变化，第一下行光信号或上行光信号的传输速率降低，误码率升高等。第二光无线设备触发校准机制后，将停止向第一光无线设备发送下行数据，并更新对上行光信号进行调制消除的参数。Wherein, the calibration conditions include but are not limited to: the transmission distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or uplink optical signal decreases, and the bit error rate increases. After the second optical wireless device triggers the calibration mechanism, it stops sending downlink data to the first optical wireless device, and updates parameters for performing modulation and cancellation on the uplink optical signal.
本申请实施例中的第二光无线设备为搭载了可用于执行计算机执行指令的处理器的设备，可以是如基站之类的网络设备，具体还可以是如上述图5至图13所示实施例中的光无线网络设备。本申请实施例中的第一光无线设备为搭载了可用于执行计算机执行指令的处理器的设备，可以是如UE之类的终端设备，具体还可以是如上述图5至图13所示实施例中的光无线终端设备。The second optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and may be a network device such as a base station. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above. Optical wireless network equipment in the example. The first optical wireless device in the embodiment of the present application is a device equipped with a processor that can be used to execute computer-executed instructions, and it may be a terminal device such as a UE. Specifically, it may also be implemented as shown in FIGS. 5 to 13 above. Examples of optical wireless terminal equipment.
步骤S1702：第二光无线设备向第一光无线设备发送校准指示。Step S1702: the second optical wireless device sends a calibration instruction to the first optical wireless device.
第二光无线设备触发校准机制的同时，还将向第一光无线设备发送校准指示，用于指示 第一光无线设备更新对第一下行光信号进行调制消除的参数。相应的，第一光无线设备接收第二光无线设备发送的校准请求。When the second optical wireless device triggers the calibration mechanism, it will also send a calibration indication to the first optical wireless device, for instructing the first optical wireless device to update parameters for performing modulation and cancellation on the first downlink optical signal. Correspondingly, the first optical wireless device receives the calibration request sent by the second optical wireless device.
此外，第二光无线设备还将向第一光无线设备发送上行数据停发指示，用于指示第一光无线设备停止向第二光无线设备发送上行数据。相应的，第一光无线设备接收第二光无线设备发送的上行数据停发指示。In addition, the second optical wireless device will also send an instruction to stop sending uplink data to the first optical wireless device, for instructing the first optical wireless device to stop sending uplink data to the second optical wireless device. Correspondingly, the first optical wireless device receives the uplink data stop sending instruction sent by the second optical wireless device.
步骤S1703：第一光无线设备启动校准机制。Step S1703: the first optical wireless device starts a calibration mechanism.
第一光无线设备在接收到第二光无线设备发送的校准指示后，启动校准机制。主要包括停止与第二光无线设备之间的数据传输，更新对第一下行光信号进行调制消除的参数。After receiving the calibration instruction sent by the second optical wireless device, the first optical wireless device starts a calibration mechanism. It mainly includes stopping data transmission with the second optical wireless device, and updating parameters for performing modulation and elimination on the first downlink optical signal.
可以理解的是，在第二光无线设备以及第一光无线设备完成校准之后，第二光无线设备以及第一光无线设备将重新进入初始化阶段，即执行上述图15中的通信方法。It can be understood that after the calibration of the second optical wireless device and the first optical wireless device is completed, the second optical wireless device and the first optical wireless device will re-enter the initialization phase, that is, execute the communication method in FIG. 15 above.
通过本申请实施例，可以及时更新对上行光信号进行调制消除的参数，保障第一光无线设备与第二光无线设备之间建立稳定可靠的通信链路，提高高速通信应用场景下的稳定性，从而实现上下行通信同时工作，提高上下行通信效率。Through the embodiment of the present application, the parameters for modulating and eliminating the uplink optical signal can be updated in time, ensuring the establishment of a stable and reliable communication link between the first optical wireless device and the second optical wireless device, and improving the stability in high-speed communication application scenarios , so as to realize simultaneous operation of uplink and downlink communication, and improve uplink and downlink communication efficiency.
由上述图16和图17所示的实施例可以看出，由于通信距离变化、通信速率降低、误码率升高等因素触发校准机制，启动校准机制的主体可以为第一光无线设备或第二光无线设备。It can be seen from the embodiments shown in Figure 16 and Figure 17 above that the calibration mechanism is triggered by factors such as changes in communication distance, reduction in communication rate, and increase in bit error rate, and the main body that initiates the calibration mechanism can be the first optical wireless device or the second optical wireless device. Optical wireless devices.
此外，还可以根据实施监控和分时监控的策略将校准机制分为间歇校准和持续校准两类。其中，上述图16和图17所示的实施例为间歇校准，即第一光无线设备和第二光无线设备完成校准后，重新进入初始化阶段，即执行上述图15中的通信方法。In addition, the calibration mechanism can also be divided into intermittent calibration and continuous calibration according to the strategy of implementing monitoring and time-sharing monitoring. Among them, the above-mentioned embodiments shown in FIG. 16 and FIG. 17 are intermittent calibration, that is, after the first optical wireless device and the second optical wireless device complete the calibration, they re-enter the initialization phase, that is, execute the communication method in FIG. 15 above.
下面将结合图18和图19对持续校准进行说明。Continuous calibration will be described below with reference to FIG. 18 and FIG. 19 .
请参阅图18和图19，图18和图19为本申请实施例提供的另一种通信方法的流程示意图，也可以理解为是上述图14或图15或图16或图17中的通信方法流程图的变形或补充。Please refer to Figure 18 and Figure 19, Figure 18 and Figure 19 are schematic flowcharts of another communication method provided by the embodiment of this application, which can also be understood as the communication method in Figure 14 or Figure 15 or Figure 16 or Figure 17 Variations or additions to flowcharts.
如图18和图19所示，本申请实施例的通信方法应用的通信系统包括但不限于第一光无线设备和第二光无线设备。As shown in FIG. 18 and FIG. 19 , the communication system to which the communication method according to the embodiment of the present application is applied includes but is not limited to a first optical wireless device and a second optical wireless device.
区别于上述图16和图17所示的间歇校准，本申请实施例所示的持续校准在完成初始化后，第二光无线设备可以持续发送定位信号，用于实时测量第二光无线设备与第一光无线设备之间的通信距离。当存在距离变化，或通信速率降低，或误码率升高等情况时，第二光无线设备可以利用实时测量得到的通信距离，主动更新对上行光信号进行调制消除的参数。Different from the intermittent calibration shown in FIG. 16 and FIG. 17 above, after the continuous calibration shown in the embodiment of the present application is initialized, the second optical wireless device can continuously send positioning signals for real-time measurement of the distance between the second optical wireless device and the first wireless device. A communication distance between optical wireless devices. When the distance changes, the communication rate decreases, or the bit error rate increases, the second optical wireless device can use the communication distance measured in real time to actively update the parameters for modulating and eliminating the uplink optical signal.
其中，该定位信号可以是脉冲信号、FMCW信号、UWB信号、OOK信号等。Wherein, the positioning signal may be a pulse signal, an FMCW signal, a UWB signal, an OOK signal, and the like.
如图18所示，该定位信号可以与下行数据在不同的射频频段通过第二光无线设备输出。As shown in FIG. 18 , the positioning signal and the downlink data may be output through the second optical wireless device in a radio frequency band different from that of the downlink data.
如图19所示，在第二光无线设备射频带宽受限的情况下，定位信号也可以采用UWB信号与下行数据同时同频段传输。此外，若第一光无线设备基于通信速率或误码率等因素判断需要刷新数据，则向第二光无线设备发送刷新请求。相应的，第二光无线设备接收到刷新请求后，主动更新对上行光信号进行调制消除的参数。As shown in FIG. 19 , in the case that the radio frequency bandwidth of the second optical wireless device is limited, the positioning signal may also be simultaneously transmitted in the same frequency band as the UWB signal and the downlink data. In addition, if the first optical wireless device determines that data needs to be refreshed based on factors such as communication rate or bit error rate, it sends a refresh request to the second optical wireless device. Correspondingly, after receiving the refresh request, the second optical wireless device actively updates the parameters for performing modulation and cancellation on the uplink optical signal.
通过本申请实施例，可以及时更新对上行光信号进行调制消除的参数，保障第一光无线设备与第二光无线设备之间建立稳定可靠的通信链路，提高高速通信应用场景下的稳定性，从而实现上下行通信同时工作，提高上下行通信效率。Through the embodiment of the present application, the parameters for modulating and eliminating the uplink optical signal can be updated in time, ensuring the establishment of a stable and reliable communication link between the first optical wireless device and the second optical wireless device, and improving the stability in high-speed communication application scenarios , so as to realize simultaneous operation of uplink and downlink communication, and improve uplink and downlink communication efficiency.
以上，结合图14至图19详细说明了本申请实施例提供的通信方法。Above, the communication method provided by the embodiment of the present application is described in detail with reference to FIG. 14 to FIG. 19 .
以下，结合图20至图22详细说明本申请实施例提供的装置。Hereinafter, the device provided by the embodiment of the present application will be described in detail with reference to FIG. 20 to FIG. 22 .
可以理解的是，为了实现上述图14至图19所示实施例中的功能，第一光无线设备以及第二光无线设备包括了执行各个功能相应的硬件结构和/或软件模块，具体可以是上述图6至 图13中所示的光无线设备的结构。It can be understood that, in order to realize the functions in the embodiments shown in FIGS. 14 to 19 above, the first optical wireless device and the second optical wireless device include hardware structures and/or software modules corresponding to each function, specifically, The structure of the optical wireless device shown in FIGS. 6 to 13 described above.
此外，本领域技术人员还应该很容易意识到，除了上述图6至图13中所示的光无线设备的结构，结合本申请中所公开的实施例描述的各示例的单元及方法步骤，本申请还可以以硬件、软件、或硬件和软件相结合的形式来实现。某个功能究竟以硬件、软件、或是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用场景和设计约束条件。In addition, those skilled in the art should easily realize that, in addition to the structure of the optical wireless device shown in FIG. 6 to FIG. The application can also be implemented in the form of hardware, software, or a combination of hardware and software. Whether a certain function is executed by hardware, software, or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.
请参阅图20，图20为本申请实施例提供的一种通信装置的结构示意图。Please refer to FIG. 20 . FIG. 20 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
如图20所示，该通信装置200可以包括收发单元2001以及处理单元2002。收发单元2001以及处理单元2002可以是软件，也可以是硬件，或者是软件和硬件结合。As shown in FIG. 20 , the communication device 200 may include a transceiver unit 2001 and a processing unit 2002 . The transceiver unit 2001 and the processing unit 2002 may be software, or hardware, or a combination of software and hardware.
其中，收发单元2001可以实现发送功能和/或接收功能，收发单元2001也可以描述为通信单元。收发单元2001还可以是集成了获取单元和发送单元的单元，其中，获取单元用于实现接收功能，发送单元用于实现发送功能。可选的，收发单元2001可以用于接收其他装置发送的信息，还可以用于向其他装置发送信息。Wherein, the transceiver unit 2001 may implement a sending function and/or a receiving function, and the transceiver unit 2001 may also be described as a communication unit. The transceiver unit 2001 may also be a unit integrating an acquisition unit and a sending unit, wherein the acquisition unit is used to realize the receiving function, and the sending unit is used to realize the sending function. Optionally, the transceiver unit 2001 may be used to receive information sent by other devices, and may also be used to send information to other devices.
在一种可能的设计中，该通信装置200可对应于上述图14至图19所示的方法实施例中的第一光无线设备，如该通信装置200可以是第一光无线设备，也可以是第一光无线设备中的芯片。该通信装置200可以包括用于执行上述图14至图19所示的方法实施例中由第一光无线设备所执行的操作的单元，并且，该通信装置200中的各单元分别为了实现上述图14至图19所示的方法实施例中由第一光无线设备所执行的操作。其中，各个单元的描述如下：In a possible design, the communication device 200 may correspond to the first optical wireless device in the method embodiments shown in FIGS. It is the chip in the First Optical wireless device. The communication device 200 may include units for performing the operations performed by the first optical wireless device in the method embodiments shown in FIGS. 14 to operations performed by the first optical wireless device in the method embodiments shown in FIG. 19 . Among them, the description of each unit is as follows:
处理单元2002，用于对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号；其中，所述上行光信号和所述第二下行光信号为所述第一下行光信号分成的两路光信号，所述上行光信号用于反射回第二光无线设备；The processing unit 2002 is configured to perform optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal; wherein, the uplink optical signal and the second downlink optical signal are the first downlink optical signal The uplink optical signal is divided into two optical signals, and the uplink optical signal is used for reflection back to the second optical wireless device;
所述处理单元2002，还用于根据获取的所述第二下行光信号，得到第一下行电信号。The processing unit 2002 is further configured to obtain a first downlink electrical signal according to the acquired second downlink optical signal.
在一种可能的实施方式中，所述处理单元2002，还用于对光信号进行强度调制或相位调制。In a possible implementation manner, the processing unit 2002 is further configured to perform intensity modulation or phase modulation on the optical signal.
在一种可能的实施方式中，所述处理单元2002，还用于根据所述第二下行光信号，生成荧光信号；In a possible implementation manner, the processing unit 2002 is further configured to generate a fluorescence signal according to the second downlink optical signal;
所述处理单元2002，还用于对所述荧光信号进行光电变化，得到所述第一下行电信号。The processing unit 2002 is further configured to perform photoelectric changes on the fluorescent signal to obtain the first downlink electrical signal.
在一种可能的实施方式中，所述处理单元2002，还用于对多个荧光信号进行光电变化后得到多个电信号；In a possible implementation manner, the processing unit 2002 is further configured to perform photoelectric changes on a plurality of fluorescent signals to obtain a plurality of electrical signals;
所述处理单元2002，还用于将所述多个电信号合并，得到所述第一下行电信号。The processing unit 2002 is further configured to combine the multiple electrical signals to obtain the first downlink electrical signal.
在一种可能的实施方式中，所述处理单元2002，还用于根据上行电信号对所述第一下行电信号进行调制消除，得到第二下行电信号。In a possible implementation manner, the processing unit 2002 is further configured to perform modulation and cancellation on the first downlink electrical signal according to the uplink electrical signal to obtain a second downlink electrical signal.
在一种可能的实施方式中，所述处理单元2002，还用于计算目标时延，所述目标时延为输入所述上行电信号到生成所述第一下行电信号之间的时延；In a possible implementation manner, the processing unit 2002 is further configured to calculate a target delay, where the target delay is a delay between inputting the uplink electrical signal and generating the first downlink electrical signal ;
所述处理单元2002，还用于根据所述目标时延对所述第一下行电信号进行重构。The processing unit 2002 is further configured to reconstruct the first downlink electrical signal according to the target time delay.
在一种可能的实施方式中，收发单元2001，用于接收所述第二光无线设备发送的定位信号，所述定位信号用于确定所述第二光无线设备与所述通信装置之间的距离信息，所述距离信息用于所述第二光无线设备确定对所述上行光信号进行调制消除的参数。In a possible implementation manner, the transceiver unit 2001 is configured to receive a positioning signal sent by the second optical wireless device, where the positioning signal is used to determine the distance between the second optical wireless device and the communication device. distance information, where the distance information is used by the second optical wireless device to determine parameters for performing modulation and cancellation on the uplink optical signal.
在一种可能的实施方式中，所述收发单元2001，还用于接收所述第二光无线设备发送的通信请求；In a possible implementation manner, the transceiver unit 2001 is further configured to receive a communication request sent by the second optical wireless device;
所述处理单元2002，还用于确定对所述第一下行电信号进行调制消除的参数；The processing unit 2002 is further configured to determine parameters for performing modulation and cancellation on the first downlink electrical signal;
所述收发单元2001，还用于响应于所述通信请求，向所述第二光无线设备发送应答消息。The transceiver unit 2001 is further configured to send a response message to the second optical wireless device in response to the communication request.
在一种可能的实施方式中，所述收发单元2001，还用于在满足校准条件的情况下，向所述第二光无线设备发送校准请求；其中，所述校准请求用于请求所述第二光无线设备更新对所述上行光信号进行调制消除的参数，所述校准条件包括以下一项或多项：所述第二光无线设备与所述第一光无线设备之间的距离变化、所述第一下行光信号或所述上行光信号的传输速率降低、误码率升高。In a possible implementation manner, the transceiver unit 2001 is further configured to send a calibration request to the second optical wireless device when the calibration condition is satisfied; wherein the calibration request is used to request the first The second optical wireless device updates parameters for performing modulation and elimination on the uplink optical signal, and the calibration conditions include one or more of the following: a change in distance between the second optical wireless device and the first optical wireless device, The transmission rate of the first downlink optical signal or the uplink optical signal decreases, and the bit error rate increases.
在另一种可能的设计中，该通信装置200可对应于上述图14至图19所示的方法实施例中的第二光无线设备，如该通信装置200可以是第二光无线设备，也可以是第二光无线设备中的芯片。该通信装置200可以包括用于执行上述图14至图19所示的方法实施例中由第二光无线设备所执行的操作的单元，并且，该通信装置200中的各单元分别为了实现上述图14至图19所示的方法实施例中由第二光无线设备所执行的操作。其中，各个单元的描述如下：In another possible design, the communication device 200 may correspond to the second optical wireless device in the method embodiments shown in FIGS. It may be a chip in the second optical wireless device. The communication device 200 may include units for performing the operations performed by the second optical wireless device in the method embodiments shown in FIGS. 14 to operations performed by the second optical wireless device in the method embodiments shown in FIG. 19 . Among them, the description of each unit is as follows:
收发单元2001，用于向第一光无线设备发射第一下行光信号；其中，所述第一下行光信号经过光信号处理后分成上行光信号和第二下行光信号，所述上行光信号用于反射回所述通信装置；The transceiver unit 2001 is configured to transmit a first downlink optical signal to a first optical wireless device; wherein, the first downlink optical signal is divided into an uplink optical signal and a second downlink optical signal after optical signal processing, and the uplink optical signal a signal for reflection back to said communication device;
处理单元2002，用于根据获取的所述上行光信号，得到第一上行电信号。The processing unit 2002 is configured to obtain a first uplink electrical signal according to the acquired uplink optical signal.
在一种可能的实施方式中，所述处理单元2002，还用于根据接收到的所述上行光信号，生成荧光信号；In a possible implementation manner, the processing unit 2002 is further configured to generate a fluorescent signal according to the received uplink optical signal;
所述处理单元2002，还用于对所述荧光信号进行光电变化，得到所述第一上行电信号。The processing unit 2002 is further configured to perform photoelectric changes on the fluorescent signal to obtain the first uplink electrical signal.
在一种可能的实施方式中，所述处理单元2002，还用于根据下行电信号对所述第一上行电信号进行调制消除，得到第二上行电信号。In a possible implementation manner, the processing unit 2002 is further configured to perform modulation and cancellation on the first uplink electrical signal according to the downlink electrical signal to obtain a second uplink electrical signal.
在一种可能的实施方式中，所述处理单元2002，还用于计算目标时延，所述目标时延为输入所述下行电信号到生成所述第一上行电信号之间的时延；In a possible implementation manner, the processing unit 2002 is further configured to calculate a target delay, where the target delay is a delay between inputting the downlink electrical signal and generating the first uplink electrical signal;
所述处理单元2002，还用于根据所述目标时延对所述第一上行电信号进行重构。The processing unit 2002 is further configured to reconstruct the first uplink electrical signal according to the target delay.
在一种可能的实施方式中，所述收发单元2001，还用于向所述第一光无线设备发送定位信号，所述定位信号用于确定所述第二光无线设备与所述第一光无线设备之间的距离信息；In a possible implementation manner, the transceiver unit 2001 is further configured to send a positioning signal to the first optical wireless device, and the positioning signal is used to determine the relationship between the second optical wireless device and the first optical wireless device. Distance information between wireless devices;
所述处理单元2002，还用于根据所述距离信息，确定对所述上行光信号进行调制消除的参数。The processing unit 2002 is further configured to determine parameters for performing modulation and cancellation on the uplink optical signal according to the distance information.
在一种可能的实施方式中，所述收发单元2001，还用于向所述第一光无线设备发送通信请求；In a possible implementation manner, the transceiver unit 2001 is further configured to send a communication request to the first optical wireless device;
所述收发单元2001，还用于接收所述通信请求对应的应答消息。The transceiving unit 2001 is further configured to receive a response message corresponding to the communication request.
在一种可能的实施方式中，所述处理单元2002，还用于在满足校准条件的情况下，或者，在接收到所述第一光无线设备发送的校准请求的情况下，更新对所述上行光信号进行调制消除的参数；其中，所述校准条件包括以下一项或多项：所述第二光无线设备与所述第一光无线设备之间的距离变化、所述第一下行光信号或所述上行光信号的传输速率降低、误码率升高。In a possible implementation manner, the processing unit 2002 is further configured to, if the calibration condition is met, or, if the calibration request sent by the first optical wireless device is received, update the Uplink optical signal modulation cancellation parameters; wherein, the calibration conditions include one or more of the following: the distance change between the second optical wireless device and the first optical wireless device, the first downlink The transmission rate of the optical signal or the uplink optical signal decreases, and the bit error rate increases.
根据本申请实施例，图20所示的装置中的各个单元可以分别或全部合并为一个或若干个另外的单元来构成，或者其中的某个(些)单元还可以再拆分为功能上更小的多个单元来构成，这可以实现同样的操作，而不影响本申请的实施例的技术效果的实现。上述单元是基于逻辑功能划分的，在实际应用中，一个单元的功能也可以由多个单元来实现，或者多个单元的功能由一个单元实现。在本申请的其它实施例中，基于网络设备也可以包括其它单元，在实际应用中，这些功能也可以由其它单元协助实现，并且可以由多个单元协作实现。According to the embodiment of the present application, each unit in the device shown in FIG. 20 can be separately or all combined into one or several other units to form, or one (some) units can be split into more functional units. It is composed of multiple small units, which can achieve the same operation without affecting the realization of the technical effects of the embodiments of the present application. The above-mentioned units are divided based on logical functions. In practical applications, the functions of one unit may also be realized by multiple units, or the functions of multiple units may be realized by one unit. In other embodiments of the present application, the network-based device may also include other units. In practical applications, these functions may also be assisted by other units, and may be implemented cooperatively by multiple units.
需要说明的是，各个单元的实现还可以对应参照上述图14至图19所示的方法实施例的 相应描述。It should be noted that, for the implementation of each unit, reference may also be made to the corresponding descriptions of the method embodiments shown in Fig. 14 to Fig. 19 above.
在图20所描述的通信装置200中，对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号，其中，上行光信号和第二下行光信号为第一下行光信号分成的两路光信号，上行光信号用于反射回第二光无线设备，第二下行光信号用于接收并执行光电变化处理得到第一下行电信号，从而实现上行及下行通信功能。In the communication device 200 described in FIG. 20 , optical signal processing is performed on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal and the second downlink optical signal are the first downlink optical signal The optical signal is divided into two optical signals, the uplink optical signal is used to reflect back to the second optical wireless device, and the second downlink optical signal is used to receive and perform photoelectric change processing to obtain the first downlink electrical signal, thereby realizing uplink and downlink communication functions .
请参阅图21，图21为本申请实施例提供的一种通信装置的结构示意图。Please refer to FIG. 21 . FIG. 21 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
应理解，图21示出的通信装置210仅是示例，本申请实施例的通信装置还可包括其他部件，或者包括与图21中的各个部件的功能相似的部件，或者并非要包括图21中所有部件。It should be understood that the communication device 210 shown in FIG. 21 is only an example, and the communication device in the embodiment of the present application may also include other components, or include components with functions similar to those in FIG. 21 , or not include the components in FIG. 21 all parts.
通信装置210包括通信接口2101和至少一个处理器2102。The communication device 210 includes a communication interface 2101 and at least one processor 2102 .
该通信装置210可以对应第一光无线设备或第二光无线设备中的任一网元或设备。通信接口2101用于收发信号，至少一个处理器2102执行程序指令，使得通信装置210实现上述方法实施例中由对应网元所执行的方法的相应流程。The communication apparatus 210 may correspond to any network element or device in the first optical wireless device or the second optical wireless device. The communication interface 2101 is used to send and receive signals, and at least one processor 2102 executes program instructions, so that the communication device 210 implements the corresponding process of the method performed by the corresponding network element in the above method embodiment.
在一种可能的设计中，该通信装置210可对应于上述图14至图19所示的方法实施例中的第一光无线设备，如该通信装置210可以是第一光无线设备，也可以是第一光无线设备中的芯片。该通信装置210可以包括用于执行上述方法实施例中由第一光无线设备所执行的操作的部件，并且，该通信装置210中的各部件分别为了实现上述方法实施例中由第一光无线设备所执行的操作。具体可以如下所示：In a possible design, the communication device 210 may correspond to the first optical wireless device in the method embodiments shown in FIGS. It is the chip in the First Optical wireless device. The communication device 210 may include components for performing the operations performed by the first optical wireless device in the above method embodiments, and each component in the communication device 210 is to implement the operations performed by the first optical wireless device in the above method embodiments, respectively. The action performed by the device. The details can be as follows:
第一光无线设备对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号；其中，所述上行光信号和所述第二下行光信号为所述第一下行光信号分成的两路光信号，所述上行光信号用于反射回第二光无线设备；The first optical wireless device performs optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal; wherein the uplink optical signal and the second downlink optical signal are the first downlink optical signal The optical signal is divided into two optical signals, and the uplink optical signal is used for reflection back to the second optical wireless device;
所述第一光无线设备根据获取的所述第二下行光信号，得到第一下行电信号。The first optical wireless device obtains a first downlink electrical signal according to the acquired second downlink optical signal.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
对光信号进行强度调制或相位调制。Intensity or phase modulation of optical signals.
在一种可能的实施方式中，所述根据获取的所述第二下行光信号，得到第一下行电信号，包括：In a possible implementation manner, the obtaining the first downlink electrical signal according to the acquired second downlink optical signal includes:
根据所述第二下行光信号，生成荧光信号；generating a fluorescent signal according to the second downlink optical signal;
对所述荧光信号进行光电变化，得到所述第一下行电信号。performing a photoelectric change on the fluorescent signal to obtain the first downlink electrical signal.
在一种可能的实施方式中，所述对所述荧光信号进行光电变化，得到所述第一下行电信号，包括：In a possible implementation manner, the photoelectric change of the fluorescent signal to obtain the first downlink electrical signal includes:
对多个荧光信号进行光电变化后得到多个电信号；After performing photoelectric changes on multiple fluorescent signals, multiple electrical signals are obtained;
将所述多个电信号合并，得到所述第一下行电信号。combining the multiple electrical signals to obtain the first downlink electrical signal.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
根据上行电信号对所述第一下行电信号进行调制消除，得到第二下行电信号。The first downlink electrical signal is modulated and eliminated according to the uplink electrical signal to obtain a second downlink electrical signal.
在一种可能的实施方式中，所述根据上行电信号对所述第一下行电信号进行调制消除，包括：In a possible implementation manner, the performing modulation and cancellation on the first downlink electrical signal according to the uplink electrical signal includes:
计算目标时延，所述目标时延为输入所述上行电信号到生成所述第一下行电信号之间的时延；calculating a target time delay, where the target time delay is a time delay between inputting the uplink electrical signal and generating the first downlink electrical signal;
根据所述目标时延对所述第一下行电信号进行重构。Reconstructing the first downlink electrical signal according to the target time delay.
在一种可能的实施方式中，所述对第一下行光信号执行光信号处理之前，所述方法还包括：In a possible implementation manner, before performing optical signal processing on the first downlink optical signal, the method further includes:
接收所述第二光无线设备发送的定位信号，所述定位信号用于确定所述第二光无线设备 与所述第一光无线设备之间的距离信息，所述距离信息用于所述第二光无线设备确定对所述上行光信号进行调制消除的参数。receiving a positioning signal sent by the second optical wireless device, where the positioning signal is used to determine distance information between the second optical wireless device and the first optical wireless device, and the distance information is used for the first optical wireless device The two-optical wireless device determines parameters for performing modulation and cancellation on the uplink optical signal.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
接收所述第二光无线设备发送的通信请求；receiving a communication request sent by the second optical wireless device;
确定对所述第一下行电信号进行调制消除的参数；determining parameters for performing modulation and cancellation on the first downlink electrical signal;
响应于所述通信请求，向所述第二光无线设备发送应答消息。A response message is sent to the second optical wireless device in response to the communication request.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
在满足校准条件的情况下，向所述第二光无线设备发送校准请求；其中，所述校准请求用于请求所述第二光无线设备更新对所述上行光信号进行调制消除的参数，所述校准条件包括以下一项或多项：所述第二光无线设备与所述第一光无线设备之间的距离变化、所述第一下行光信号或所述上行光信号的传输速率降低、误码率升高。When the calibration condition is met, a calibration request is sent to the second optical wireless device; wherein the calibration request is used to request the second optical wireless device to update parameters for performing modulation and cancellation on the uplink optical signal, so The calibration conditions include one or more of the following: the distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or the uplink optical signal decreases , The bit error rate increases.
在另一种可能的设计中，该通信装置210可对应于上述图14至图19所示的方法实施例中的第二光无线设备，如该通信装置210可以是第二光无线设备，也可以是第二光无线设备中的芯片。该通信装置210可以包括用于执行上述方法实施例中由第二光无线设备所执行的操作的部件，并且，该通信装置210中的各部件分别为了实现上述方法实施例中由第二光无线设备所执行的操作。具体可以如下所示：In another possible design, the communication device 210 may correspond to the second optical wireless device in the method embodiments shown in FIGS. It may be a chip in the second optical wireless device. The communication device 210 may include components for performing the operations performed by the second optical wireless device in the above method embodiments, and each component in the communication device 210 is to implement the operations performed by the second optical wireless device in the above method embodiments, respectively. The action performed by the device. The details can be as follows:
第二光无线设备向第一光无线设备发射第一下行光信号；其中，所述第一下行光信号经过光信号处理后分成上行光信号和第二下行光信号，所述上行光信号用于反射回所述第二光无线设备；The second optical wireless device transmits a first downlink optical signal to the first optical wireless device; wherein, the first downlink optical signal is divided into an uplink optical signal and a second downlink optical signal after optical signal processing, and the uplink optical signal for reflection back to said second optical wireless device;
所述第二光无线设备根据获取的所述上行光信号，得到第一上行电信号。The second optical wireless device obtains the first uplink electrical signal according to the acquired uplink optical signal.
在一种可能的实施方式中，所述根据获取的所述上行光信号，得到第一上行电信号，包括：In a possible implementation manner, the obtaining the first uplink electrical signal according to the acquired uplink optical signal includes:
根据接收到的所述上行光信号，生成荧光信号；generating a fluorescent signal according to the received uplink optical signal;
对所述荧光信号进行光电变化，得到所述第一上行电信号。performing a photoelectric change on the fluorescent signal to obtain the first uplink electrical signal.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
根据下行电信号对所述第一上行电信号进行调制消除，得到第二上行电信号。The first uplink electrical signal is modulated and eliminated according to the downlink electrical signal to obtain a second uplink electrical signal.
在一种可能的实施方式中，所述根据下行电信号对所述第一上行电信号进行调制消除，包括：In a possible implementation manner, the performing modulation and cancellation on the first uplink electrical signal according to the downlink electrical signal includes:
计算目标时延，所述目标时延为输入所述下行电信号到生成所述第一上行电信号之间的时延；calculating a target time delay, where the target time delay is the time delay between inputting the downlink electrical signal and generating the first uplink electrical signal;
根据所述目标时延对所述第一上行电信号进行重构。Reconstructing the first uplink electrical signal according to the target time delay.
在一种可能的实施方式中，所述向第一光无线设备发射第一下行光信号之前，所述方法还包括：In a possible implementation manner, before transmitting the first downlink optical signal to the first optical wireless device, the method further includes:
向所述第一光无线设备发送定位信号，所述定位信号用于确定所述第二光无线设备与所述第一光无线设备之间的距离信息；sending a positioning signal to the first optical wireless device, where the positioning signal is used to determine distance information between the second optical wireless device and the first optical wireless device;
根据所述距离信息，确定对所述上行光信号进行调制消除的参数。According to the distance information, parameters for performing modulation and elimination on the uplink optical signal are determined.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
向所述第一光无线设备发送通信请求；sending a communication request to the first optical wireless device;
接收所述通信请求对应的应答消息。A response message corresponding to the communication request is received.
在一种可能的实施方式中，所述方法还包括：In a possible implementation manner, the method also includes:
在满足校准条件的情况下，或者，在接收到所述第一光无线设备发送的校准请求的情况 下，更新对所述上行光信号进行调制消除的参数；其中，所述校准条件包括以下一项或多项：所述第二光无线设备与所述第一光无线设备之间的距离变化、所述第一下行光信号或所述上行光信号的传输速率降低、误码率升高。When the calibration condition is met, or when the calibration request sent by the first optical wireless device is received, update the parameters for performing modulation cancellation on the uplink optical signal; wherein the calibration condition includes the following one One or more items: the distance between the second optical wireless device and the first optical wireless device changes, the transmission rate of the first downlink optical signal or the uplink optical signal decreases, and the bit error rate increases .
在图21所描述的通信装置210中，对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号，其中，上行光信号和第二下行光信号为第一下行光信号分成的两路光信号，上行光信号用于反射回第二光无线设备，第二下行光信号用于接收并执行光电变化处理得到第一下行电信号，从而实现上行及下行通信功能。In the communication device 210 described in FIG. 21 , optical signal processing is performed on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal, wherein the uplink optical signal and the second downlink optical signal are the first downlink optical signal The optical signal is divided into two optical signals, the uplink optical signal is used to reflect back to the second optical wireless device, and the second downlink optical signal is used to receive and perform photoelectric change processing to obtain the first downlink electrical signal, thereby realizing uplink and downlink communication functions .
对于通信装置可以是芯片或芯片系统的情况，可参阅图22所示的芯片的结构示意图。For the case where the communication device may be a chip or a chip system, refer to the schematic structural diagram of the chip shown in FIG. 22 .
如图22所示，芯片220包括处理器2201和接口2202。其中，处理器2201的数量可以是一个或多个，接口2202的数量可以是多个。需要说明的，处理器2201、接口2202各自对应的功能既可以通过硬件设计实现，也可以通过软件设计来实现，还可以通过软硬件结合的方式来实现，这里不作限制。As shown in FIG. 22 , the chip 220 includes a processor 2201 and an interface 2202 . Wherein, the number of processors 2201 may be one or more, and the number of interfaces 2202 may be more than one. It should be noted that the respective functions of the processor 2201 and the interface 2202 can be realized by hardware design, software design, or a combination of software and hardware, which is not limited here.
可选的，芯片220还可以包括存储器2203，存储器2203用于存储必要的程序指令和数据。Optionally, the chip 220 may also include a memory 2203 for storing necessary program instructions and data.
本申请中，处理器2201可用于从存储器2203中调用本申请的一个或多个实施例提供的通信方法在第一光无线设备或第二光无线设备中一个或多个设备或网元的实现程序，并执行该程序包含的指令。接口2202可用于输出处理器2201的执行结果。本申请中，接口2202可具体用于输出处理器2201的各个消息或信息。In this application, the processor 2201 can be used to call from the memory 2203 the implementation of one or more devices or network elements in the first optical wireless device or the second optical wireless device in the communication method provided by one or more embodiments of the present application program, and executes the instructions contained in that program. The interface 2202 can be used to output the execution result of the processor 2201 . In this application, the interface 2202 may be specifically used to output various messages or information of the processor 2201 .
关于本申请的一个或多个实施例提供的通信方法可参考前述图14至图19所示各个实施例，这里不再赘述。Regarding the communication method provided by one or more embodiments of the present application, reference may be made to the various embodiments shown in FIGS. 14 to 19 , and details are not repeated here.
本申请实施例中的处理器可以是中央处理单元(Central Processing Unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。The processor in the embodiment of the present application may be a central processing unit (Central Processing Unit, CPU), and the processor may also be other general processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
本申请实施例中的存储器用于提供存储空间，存储空间中可以存储操作系统和计算机程序等数据。存储器包括但不限于是随机存储记忆体(random access memory，RAM)、只读存储器(read-only memory，ROM)、可擦除可编程只读存储器(erasable programmable read only memory，EPROM)、或便携式只读存储器(compact disc read-only memory，CD-ROM)。The memory in the embodiment of the present application is used to provide a storage space, and data such as an operating system and a computer program may be stored in the storage space. Memory includes but not limited to random access memory (random access memory, RAM), read-only memory (read-only memory, ROM), erasable programmable read-only memory (erasable programmable read only memory, EPROM), or portable Read-only memory (compact disc read-only memory, CD-ROM).
根据本申请实施例提供的方法，本申请实施例还提供一种计算机可读存储介质，上述计算机可读存储介质中存储有计算机程序，当上述计算机程序在一个或多个处理器上运行时，可以实现上述图14至图19所示的方法。According to the method provided in the embodiment of the present application, the embodiment of the present application also provides a computer-readable storage medium, where a computer program is stored in the above-mentioned computer-readable storage medium, and when the above-mentioned computer program is run on one or more processors, The above methods shown in FIGS. 14 to 19 can be implemented.
根据本申请实施例提供的方法，本申请还提供一种计算机程序产品，该计算机程序产品包括：计算机程序，当该计算机程序在计算机上运行时，可以实现上述图14至图19所示的方法。According to the method provided in the embodiment of the present application, the present application also provides a computer program product, the computer program product including: a computer program, when the computer program is run on the computer, the above methods shown in Figure 14 to Figure 19 can be implemented .
本申请实施例还提供了一种通信系统，该通信系统包括了至少一个如上述通信装置200或通信装置210或芯片220，用于执行图14至图19任一实施例中相应网元执行的步骤。The embodiment of the present application also provides a communication system, which includes at least one communication device 200 or communication device 210 or chip 220 as described above, and is used to execute the corresponding network elements in any of the embodiments in Fig. 14 to Fig. 19 step.
本申请实施例还提供了一种处理装置，包括处理器和接口；所述处理器用于执行上述任一方法实施例中的方法。The embodiment of the present application also provides a processing device, including a processor and an interface; the processor is configured to execute the method in any one of the above method embodiments.
应理解，上述处理装置可以是一个芯片。例如，该处理装置可以是现场可编程门阵列(field programmable gate array，FPGA)，可以是通用处理器、数字信号处理器(digital  signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。It should be understood that the above processing device may be a chip. For example, the processing device may be a field programmable gate array (field programmable gate array, FPGA), a general processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC) , off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, system on chip (SoC), or central processing It can also be a central processor unit (CPU), a network processor (network processor, NP), a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (micro controller unit, MCU) , and can also be a programmable logic device (programmable logic device, PLD) or other integrated chips. Various methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。It can be understood that the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM ) and direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disc，SSD))等。In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disc, SSD)) etc.
上述各个装置实施例中的第一光无线设备以及第二光无线设备和方法实施例中的第一光无线设备以及第二光无线设备完全对应，由相应的模块或单元执行相应的步骤，例如通信单元(收发器)执行方法实施例中接收或发送的步骤，除发送、接收外的其它步骤可以由处理单元(处理器)执行。具体单元的功能可以参考相应的方法实施例。其中，处理器可以为一个或多个。The first optical wireless device and the second optical wireless device in the above-mentioned various apparatus embodiments correspond completely to the first optical wireless device and the second optical wireless device in the method embodiments, and corresponding steps are performed by corresponding modules or units, for example The communication unit (transceiver) performs the steps of receiving or sending in the method embodiments, and other steps except sending and receiving may be performed by the processing unit (processor). For the functions of the specific units, reference may be made to the corresponding method embodiments. Wherein, there may be one or more processors.
应理解，说明书通篇中提到的“实施例”意味着与实施例有关的特定特征、结构或特性包括在本申请的至少一个实施例中。因此，在整个说明书各个实施例未必一定指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。It should be understood that references to "an embodiment" throughout this specification mean that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments throughout the specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.
应理解，在本申请实施例中，编号“第一”、“第二”…仅仅为了区分不同的对象，比如为了区分不同的网络设备，并不对本申请实施例的范围构成限制，本申请实施例并不限于此。It should be understood that in this embodiment of the application, the numbers "first", "second"... are only used to distinguish different objects, such as different network devices, and do not limit the scope of the embodiment of this application. Examples are not limited to this.
还应理解，在本申请中，“当…时”、“若”以及“如果”均指在某种客观情况下网元会做出相应的处理，并非是限定时间，且也不要求网元实现时一定要有判断的动作，也不意味着存在其它限定。It should also be understood that in this application, "when", "if" and "if" all mean that the network element will make corresponding processing under certain objective circumstances, and it is not a limited time, and it does not require the network element to There must be an action of judgment during implementation, and it does not mean that there are other restrictions.
还应理解，在本申请各实施例中，“A对应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。It should also be understood that in each embodiment of the present application, "A corresponds to B" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.
还应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。It should also be understood that the term "and/or" in this article is only an association relationship describing associated objects, indicating that there may be three relationships, for example, A and/or B may indicate: A exists alone, and A and B exist simultaneously. B, there are three situations of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.
本申请中出现的类似于“项目包括如下中的一项或多项：A，B，以及C”表述的含义，如无特别说明，通常是指该项目可以为如下中任一个：A；B；C；A和B；A和C；B和C；A，B和C；A和A；A，A和A；A，A和B；A，A和C，A，B和B；A，C和C；B和B，B，B和B，B，B和C，C和C；C，C和C，以及其他A，B和C的组合。以上是以A，B和C共3个元素进行举例来说明该项目的可选用条目，当表达为“项目包括如下中至少一种：A，B，……，以及X”时，即表达中具有更多元素时，那么该项目可以适用的条目也可以按照前述规则获得。The meaning of the expression similar to "the item includes one or more of the following: A, B, and C" appearing in this application, unless otherwise specified, usually means that the item can be any of the following: A; B ;C;A and B;A and C;B and C;A,B and C;A and A;A,A and A;A,A and B;A,A and C,A,B and B;A , C and C; B and B, B, B and B, B, B and C, C and C; C, C and C, and other combinations of A, B and C. The above is an example of the three elements of A, B and C to illustrate the optional items of the project. When the expression is "the project includes at least one of the following: A, B, ..., and X", it is in the expression When there are more elements, then the applicable entries for this item can also be obtained according to the aforementioned rules.
可以理解的，本申请实施例中，第一光无线设备以及第二光无线设备可以执行本申请实施例中的部分或全部步骤，这些步骤或操作仅是示例，本申请实施例还可以执行其它操作或者各种操作的变形。此外，各个步骤可以按照本申请实施例呈现的不同的顺序来执行，并且有可能并非要执行本申请实施例中的全部操作。It can be understood that, in the embodiment of the present application, the first optical wireless device and the second optical wireless device may perform some or all of the steps in the embodiment of the present application, these steps or operations are only examples, and the embodiment of the present application may also perform other Operations or variants of operations. In addition, each step may be performed in a different order presented in the embodiment of the present application, and it may not be necessary to perform all operations in the embodiment of the present application.
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个 单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器ROM、随机存取存储器RAM、磁碟或者光盘等各种可以存储程序代码的介质。If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory ROM, random access memory RAM, magnetic disk or optical disk, and other media capable of storing program codes.
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application.

Claims (29)

  1. 一种光无线设备，其特征在于，包括：An optical wireless device, characterized in that it includes:
    第一处理单元和第一收发单元；a first processing unit and a first transceiver unit;
    所述第一处理单元，用于对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号；其中，所述上行光信号用于反射回第二光无线设备；The first processing unit is configured to perform optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal; wherein the uplink optical signal is used for reflection back to the second optical wireless device;
    所述第一收发单元，用于获取所述第二下行光信号，发送第一下行电信号。The first transceiver unit is configured to acquire the second downlink optical signal and send a first downlink electrical signal.
  2. 根据权利要求1所述的光无线设备，其特征在于，所述第一处理单元包括：The optical wireless device according to claim 1, wherein the first processing unit comprises:
    至少一个半透射镜；at least one semi-transmissive mirror;
    所述第一下行光信号经过所述至少一个半透射镜后，分成反射光信号和所述第二下行光信号。After passing through the at least one semi-transparent mirror, the first downlink optical signal is divided into a reflected optical signal and the second downlink optical signal.
  3. 根据权利要求2所述的光无线设备，其特征在于，所述第一处理单元还包括：The optical wireless device according to claim 2, wherein the first processing unit further comprises:
    至少一个透镜；at least one lens;
    所述第一下行光信号经过所述至少一个透镜的入射角和所述上行光信号经过所述至少一个透镜的出射角相同。An incident angle of the first downlink optical signal passing through the at least one lens is the same as an outgoing angle of the uplink optical signal passing through the at least one lens.
  4. 根据权利要求2或3所述的光无线设备，其特征在于，所述第一处理单元还包括：The optical wireless device according to claim 2 or 3, wherein the first processing unit further comprises:
    光调制器；light modulator;
    所述光调制器，用于对光信号进行强度调制或相位调制。The optical modulator is used to perform intensity modulation or phase modulation on the optical signal.
  5. 根据权利要求1至4中任一项所述的光无线设备，其特征在于，所述第一收发单元包括：The optical wireless device according to any one of claims 1 to 4, wherein the first transceiver unit comprises:
    荧光收集器和光电探测器；Fluorescence collectors and photodetectors;
    所述荧光收集器，用于接收所述第二下行光信号，生成荧光信号；The fluorescence collector is configured to receive the second downlink optical signal and generate a fluorescence signal;
    所述光电探测器，用于对所述荧光信号进行光电变化，得到电信号。The photodetector is used to photoelectrically change the fluorescent signal to obtain an electrical signal.
  6. 根据权利要求5所述的光无线设备，其特征在于，所述第一收发单元还包括：The optical wireless device according to claim 5, wherein the first transceiver unit further comprises:
    合路器；Combiner;
    所述光电探测器对多个荧光信号进行光电变化后输出多个电信号；The photodetector outputs a plurality of electrical signals after photoelectrically changing the plurality of fluorescent signals;
    所述合路器，用于将所述多个电信号合并，输出所述第一下行电信号。The combiner is configured to combine the multiple electrical signals to output the first downlink electrical signal.
  7. 根据权利要求1至6中任一项所述的光无线设备，其特征在于，所述光无线设备还包括：The optical wireless device according to any one of claims 1 to 6, wherein the optical wireless device further comprises:
    调制消除单元；Modulation cancellation unit;
    所述调制消除单元，用于根据接收到的上行电信号对所述第一下行电信号进行调制消除，得到第二下行电信号。The modulation and elimination unit is configured to perform modulation and elimination on the first downlink electrical signal according to the received uplink electrical signal to obtain a second downlink electrical signal.
  8. 根据权利要求7所述的光无线设备，其特征在于，所述调制消除单元包括：The optical wireless device according to claim 7, wherein the modulation elimination unit comprises:
    时延计算单元和信号重构单元；Delay calculation unit and signal reconstruction unit;
    所述时延计算单元，用于计算目标时延，所述目标时延为输入所述上行电信号到生成所 述第一下行电信号之间的时延；The time delay calculation unit is used to calculate a target time delay, the target time delay is the time delay between inputting the uplink electrical signal and generating the first downlink electrical signal;
    所述信号重构单元，用于根据所述目标时延对所述第一下行电信号进行重构。The signal reconstruction unit is configured to reconstruct the first downlink electrical signal according to the target time delay.
  9. 根据权利要求1至8中任一项所述的光无线设备，其特征在于，所述光无线设备还包括：The optical wireless device according to any one of claims 1 to 8, wherein the optical wireless device further comprises:
    第二处理单元；second processing unit;
    所述第二处理单元用于执行以下至少一项：The second processing unit is configured to perform at least one of the following:
    发送上行电信号，所述上行电信号用于对光信号进行信号调制，或者用于对所述第一下行电信号进行调制消除；sending an uplink electrical signal, where the uplink electrical signal is used for signal modulation of an optical signal, or for modulation and cancellation of the first downlink electrical signal;
    或者，接收第二下行电信号，所述第二下行电信号为所述第一下行电信号经过调制消除后的电信号。Or, receiving a second downlink electrical signal, where the second downlink electrical signal is an electrical signal after modulation and cancellation of the first downlink electrical signal.
  10. 一种光无线设备，其特征在于，包括：An optical wireless device, characterized in that it includes:
    第三处理单元和第二收发单元；a third processing unit and a second transceiver unit;
    所述第三处理单元，用于向第一光无线设备发射第一下行光信号；其中，所述第一下行光信号经过光信号处理后分成上行光信号和第二下行光信号，所述上行光信号用于反射回所述第二收发单元；The third processing unit is configured to transmit a first downlink optical signal to the first optical wireless device; wherein the first downlink optical signal is divided into an uplink optical signal and a second downlink optical signal after optical signal processing, and the The uplink optical signal is used to reflect back to the second transceiver unit;
    所述第二收发单元，用于获取所述上行光信号，发送第一上行电信号。The second transceiver unit is configured to acquire the uplink optical signal and send a first uplink electrical signal.
  11. 根据权利要求10所述的光无线设备，其特征在于，所述第二收发单元包括：The optical wireless device according to claim 10, wherein the second transceiver unit comprises:
    荧光收集器和光电探测器；Fluorescence collectors and photodetectors;
    所述荧光收集器，用于接收所述上行光信号，生成荧光信号；The fluorescence collector is used to receive the upstream light signal and generate a fluorescence signal;
    所述光电探测器，用于对所述荧光信号进行光电变化，得到所述第一上行电信号。The photodetector is used to photoelectrically change the fluorescent signal to obtain the first uplink electrical signal.
  12. 根据权利要求10或11所述的光无线设备，其特征在于，所述光无线设备还包括：The optical wireless device according to claim 10 or 11, wherein the optical wireless device further comprises:
    调制消除单元；Modulation cancellation unit;
    所述调制消除单元，用于根据接收到的下行电信号对所述第一上行电信号进行调制消除，得到第二上行电信号。The modulation and elimination unit is configured to perform modulation and elimination on the first uplink electrical signal according to the received downlink electrical signal to obtain a second uplink electrical signal.
  13. 根据权利要求12所述的光无线设备，其特征在于，所述调制消除单元包括：The optical wireless device according to claim 12, wherein the modulation elimination unit comprises:
    时延计算单元和信号重构单元；Delay calculation unit and signal reconstruction unit;
    所述时延计算单元，用于计算目标时延，所述目标时延为输入所述下行电信号到生成所述第一上行电信号之间的时延；The time delay calculation unit is configured to calculate a target time delay, where the target time delay is the time delay between inputting the downlink electrical signal and generating the first uplink electrical signal;
    所述信号重构单元，用于根据所述目标时延对所述第一上行电信号进行重构。The signal reconstruction unit is configured to reconstruct the first uplink electrical signal according to the target time delay.
  14. 根据权利要求10至13中任一项所述的光无线设备，其特征在于，所述光无线设备还包括：The optical wireless device according to any one of claims 10 to 13, wherein the optical wireless device further comprises:
    第四处理单元；the fourth processing unit;
    所述第四处理单元用于执行以下至少一项：The fourth processing unit is configured to perform at least one of the following:
    发送下行电信号，所述下行电信号用于对光信号进行信号调制，或者用于对所述第一上行电信号进行调制消除；sending a downlink electrical signal, where the downlink electrical signal is used for signal modulation of an optical signal, or for modulation and cancellation of the first uplink electrical signal;
    或者，接收第二上行电信号，所述第二上行电信号为所述第一上行电信号经过调制消除后的电信号。Or, receiving a second uplink electrical signal, where the second uplink electrical signal is an electrical signal after modulation and cancellation of the first uplink electrical signal.
  15. 一种通信方法，其特征在于，包括：A communication method, characterized in that, comprising:
    第一光无线设备对第一下行光信号执行光信号处理，得到上行光信号和第二下行光信号；其中，所述上行光信号用于反射回第二光无线设备；The first optical wireless device performs optical signal processing on the first downlink optical signal to obtain an uplink optical signal and a second downlink optical signal; wherein the uplink optical signal is used for reflection back to the second optical wireless device;
    所述第一光无线设备根据获取的所述第二下行光信号，得到第一下行电信号。The first optical wireless device obtains a first downlink electrical signal according to the acquired second downlink optical signal.
  16. 根据权利要求15所述的方法，其特征在于，所述方法还包括：The method according to claim 15, further comprising:
    对光信号进行强度调制或相位调制。Intensity or phase modulation of optical signals.
  17. 根据权利要求15或16所述的方法，其特征在于，所述根据获取的所述第二下行光信号，得到第一下行电信号，包括：The method according to claim 15 or 16, wherein the obtaining the first downlink electrical signal according to the acquired second downlink optical signal comprises:
    根据所述第二下行光信号，生成荧光信号；generating a fluorescent signal according to the second downlink optical signal;
    对所述荧光信号进行光电变化，得到所述第一下行电信号。performing a photoelectric change on the fluorescent signal to obtain the first downlink electrical signal.
  18. 根据权利要求17所述的方法，其特征在于，所述对所述荧光信号进行光电变化，得到所述第一下行电信号，包括：The method according to claim 17, wherein the step of photoelectrically changing the fluorescent signal to obtain the first downlink electrical signal comprises:
    对多个荧光信号进行光电变化后得到多个电信号；After performing photoelectric changes on multiple fluorescent signals, multiple electrical signals are obtained;
    将所述多个电信号合并，得到所述第一下行电信号。combining the multiple electrical signals to obtain the first downlink electrical signal.
  19. 根据权利要求15至18中任一项所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 15 to 18, further comprising:
    根据上行电信号对所述第一下行电信号进行调制消除，得到第二下行电信号。The first downlink electrical signal is modulated and eliminated according to the uplink electrical signal to obtain a second downlink electrical signal.
  20. 根据权利要求19所述的方法，其特征在于，所述根据上行电信号对所述第一下行电信号进行调制消除，包括：The method according to claim 19, wherein the modulation and elimination of the first downlink electrical signal according to the uplink electrical signal comprises:
    计算目标时延，所述目标时延为输入所述上行电信号到生成所述第一下行电信号之间的时延；calculating a target time delay, where the target time delay is a time delay between inputting the uplink electrical signal and generating the first downlink electrical signal;
    根据所述目标时延对所述第一下行电信号进行重构。Reconstructing the first downlink electrical signal according to the target time delay.
  21. 一种通信方法，其特征在于，包括：A communication method, characterized in that, comprising:
    第二光无线设备向第一光无线设备发射第一下行光信号；其中，所述第一下行光信号经过光信号处理后分成上行光信号和第二下行光信号，所述上行光信号用于反射回所述第二光无线设备；The second optical wireless device transmits a first downlink optical signal to the first optical wireless device; wherein, the first downlink optical signal is divided into an uplink optical signal and a second downlink optical signal after optical signal processing, and the uplink optical signal for reflection back to said second optical wireless device;
    所述第二光无线设备根据获取的所述上行光信号，得到第一上行电信号。The second optical wireless device obtains the first uplink electrical signal according to the acquired uplink optical signal.
  22. 根据权利要求21所述的方法，其特征在于，所述根据获取的所述上行光信号，得到第一上行电信号，包括：The method according to claim 21, wherein the obtaining the first uplink electrical signal according to the acquired uplink optical signal comprises:
    根据接收到的所述上行光信号，生成荧光信号；generating a fluorescent signal according to the received uplink optical signal;
    对所述荧光信号进行光电变化，得到所述第一上行电信号。performing a photoelectric change on the fluorescent signal to obtain the first uplink electrical signal.
  23. 根据权利要求21或22所述的方法，其特征在于，所述方法还包括：The method according to claim 21 or 22, further comprising:
    根据下行电信号对所述第一上行电信号进行调制消除，得到第二上行电信号。The first uplink electrical signal is modulated and eliminated according to the downlink electrical signal to obtain a second uplink electrical signal.
  24. 根据权利要求23所述的方法，其特征在于，所述根据下行电信号对所述第一上行电信号进行调制消除，包括：The method according to claim 23, wherein the modulation and elimination of the first uplink electrical signal according to the downlink electrical signal comprises:
    计算目标时延，所述目标时延为输入所述下行电信号到生成所述第一上行电信号之间的时延；calculating a target time delay, where the target time delay is the time delay between inputting the downlink electrical signal and generating the first uplink electrical signal;
    根据所述目标时延对所述第一上行电信号进行重构。Reconstructing the first uplink electrical signal according to the target time delay.
  25. 一种通信装置，其特征在于，包括：处理器；A communication device, characterized by comprising: a processor;
    当所述处理器调用存储器中的计算机程序或指令时，使如权利要求15至20中任一项所述的方法被执行，或权利要求21至24中任一项所述的方法被执行。When the processor invokes the computer program or instructions in the memory, the method according to any one of claims 15 to 20 is performed, or the method according to any one of claims 21 to 24 is performed.
  26. 一种通信装置，其特征在于，包括：逻辑电路和通信接口；A communication device, characterized by comprising: a logic circuit and a communication interface;
    所述通信接口，用于输入信息或者输出信息；The communication interface is used to input information or output information;
    所述逻辑电路，用于通过所述通信接口输入信息或者输出信息，使如权利要求15至20中任一项所述的方法被执行，或权利要求21至24中任一项所述的方法被执行。The logic circuit is used to input information or output information through the communication interface, so that the method according to any one of claims 15 to 20 is executed, or the method according to any one of claims 21 to 24 be executed.
  27. 一种计算机可读存储介质，其特征在于，包括：A computer-readable storage medium, comprising:
    所述计算机可读存储介质用于存储指令或计算机程序；当所述指令或所述计算机程序被执行时，使如权利要求15至20中任一项所述的方法被实现，或权利要求21至24中任一项所述的方法被实现。The computer-readable storage medium is used to store instructions or computer programs; when the instructions or the computer programs are executed, the method according to any one of claims 15 to 20 is implemented, or claim 21 The method described in any one of to 24 is implemented.
  28. 一种计算机程序产品，其特征在于，包括：指令或计算机程序；A computer program product, characterized in that it includes: instructions or computer programs;
    所述指令或所述计算机程序被执行时，使如权利要求15至20中任一项所述的方法被实现，或权利要求21至24中任一项所述的方法被实现。When the instructions or the computer programs are executed, the method according to any one of claims 15 to 20 is realized, or the method according to any one of claims 21 to 24 is realized.
  29. 一种通信系统，其特征在于，包括以下至少一种：如权利要求1至9中任一项所述的光无线设备，或权利要求10至14中任一项所述的光无线设备，或权利要求25所述的通信装置，或权利要求26所述的通信装置。A communication system, characterized by comprising at least one of the following: the optical wireless device according to any one of claims 1 to 9, or the optical wireless device according to any one of claims 10 to 14, or The communication device according to claim 25, or the communication device according to claim 26.
PCT/CN2022/140329 2021-12-30 2022-12-20 Optical wireless device, communication method, and communication system WO2023125144A1 (en)

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