CN113382318B

CN113382318B - Method and apparatus for optical communication

Info

Publication number: CN113382318B
Application number: CN202010156267.5A
Authority: CN
Inventors: 周雷; 张阔; 董英华
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2023-03-10
Anticipated expiration: 2040-03-09
Also published as: CN113382318A

Abstract

The application provides an optical communication method and device, which are applied to an optical communication system, wherein a frequency band corresponding to single-wavelength light of the optical communication system is divided into a plurality of sub-frequency bands, and each sub-frequency band corresponds to a transmission rate, and the method comprises the following steps: the method comprises the steps that an Optical Line Terminal (OLT) determines a first sub-band corresponding to a first rate, wherein the first rate is the transmission rate of first data, and the first data is data to be sent to a first Optical Network Unit (ONU); the OLT carries out frequency conversion processing on a first signal to generate a second signal, the frequency of the second signal corresponds to the first sub-frequency band, and the first signal is a baseband signal generated by modulating the first data; the OLT transmits the second signal. Therefore, the ONU selects the corresponding sub-frequency band to receive data according to the rate supported by the ONU, and the condition that the ONU cannot normally work due to clock loss and the like caused by receiving data of other rates can be avoided.

Description

Method and apparatus for optical communication

Technical Field

The present application relates to the field of communications, and more particularly, to a method and apparatus for optical communication in optical communication.

Background

Passive Optical Network (PON) is a typical Passive Optical Network. A passive Optical Network includes an Optical Line Termination (OLT) installed at a central control station, and a plurality of Optical Network Units (ONUs) installed at customer sites in a coordinated manner.

Broadband access technology has developed rapidly in recent years, and PON has achieved widespread and rapid expansion on a large scale. With the continuous and rapid increase of user data demand, the speed of PON system is also increasing, for example, the transmission rate of 2.5 gigabits per second (2.5 Gbps), 10Gbps, 25Gbps, 50Gbps, etc. are known at present.

At present, a speed-up technique for a PON system is known, and in order to solve the problem of compatibility between different rates, different bands of light are used for transmission at different rates.

However, the above-described technology cannot be applied to a PON system using a single wavelength.

Disclosure of Invention

The application provides an optical communication method and an optical communication device, which can solve the compatibility problem of multiple transmission rates in a single-wavelength PON system.

In a first aspect, a method for optical communication is provided, which is applied to an optical communication system, a frequency band corresponding to single-wavelength light of the optical communication system is divided into a plurality of sub-frequency bands, and each sub-frequency band corresponds to a transmission rate, and the method includes: the method comprises the steps that an Optical Line Terminal (OLT) determines a first sub-frequency band corresponding to a first speed, wherein the first speed is the transmission speed of first data, and the first data is data to be sent to a first Optical Network Unit (ONU); the OLT carries out frequency conversion processing on a first signal to generate a second signal, the frequency of the second signal corresponds to the first sub-frequency band, and the first signal is a baseband signal generated by modulating the first data; the OLT transmits the second signal.

According to the scheme of the application, the frequency band of the single-wavelength light used by the PON system is divided into a plurality of sub-frequency bands, and each sub-frequency band is used for transmitting data with one transmission rate, so that the ONU can select the corresponding sub-frequency band to receive the data according to the rate supported by the ONU. Because the ONU can only receive data at one rate, the scheme provided by the application can avoid the condition that the ONU cannot normally work due to clock loss and the like caused by receiving data at other rates.

In the above implementation, the first sub-band does not include a frequency corresponding to the baseband signal, and therefore, the frequency conversion processing needs to be performed on the first signal.

However, the present application is not limited thereto, and the first sub-band may include a frequency corresponding to a baseband signal, in which case, the first signal does not need to be frequency-converted, that is, in this case, the method includes: the method comprises the steps that an Optical Line Terminal (OLT) determines a first sub-frequency band corresponding to a first speed, wherein the first speed is the transmission speed of first data, and the first data is data to be sent to a first Optical Network Unit (ONU); the OLT generates a first signal, wherein the frequency of the first signal corresponds to the first sub-frequency band, and the first signal is a baseband signal generated by modulating the first data; the OLT transmits the first signal.

Optionally, the plurality of sub-bands includes at least two sub-bands with different frequency ranges.

Therefore, the requirements of transmission resources for transmission at different rates can be flexibly met.

Optionally, at least two sub-bands with the same frequency range are included in the plurality of sub-bands.

Thus, the division of the self-band can be facilitated.

Optionally, the frequency range of each sub-band corresponds to the size of the rate to which the sub-band corresponds.

For example, the higher the rate corresponding to a sub-band, the larger the frequency range of that sub-band.

Optionally, a sub-band corresponding to 10 gigabits per second (Gbps) of the plurality of sub-bands is a sub-band including a baseband frequency.

Therefore, the compatibility of the prior art can be facilitated, and the practicability of the application is further improved.

Optionally, the position of each sub-band corresponds to the size of the rate corresponding to that sub-band.

For example, the higher the rate corresponding to a sub-band, the closer the sub-band is located to the high frequency side (or, in other words, the farther away from the baseband frequency side).

Optionally, a guard interval exists between any two sub-bands of the plurality of sub-bands.

Therefore, the influence of data transmission on adjacent sub-frequency bands on each other can be reduced, and the practicability of the application can be further improved.

Optionally, the OLT performs frequency conversion processing on the first signal, including: the OLT performs frequency conversion processing on the first signal in an electrical signal domain (or digital domain or digital signal domain). That is, the first signal and the second signal are electrical signals. That is, the frequency conversion processing is performed before the photoelectric conversion processing.

Therefore, frequency conversion processing can be easily realized, and the cost of the optical communication equipment can be reduced.

However, the present application is not limited thereto, and the first signal and the second signal may be optical signals. Alternatively, the frequency conversion process may be performed after the photoelectric conversion process. I.e. the process is repeated. The OLT carries out frequency conversion processing on the first signal and comprises the following steps: the OLT performs frequency conversion processing on the first signal in an optical signal domain (or an analog domain or an analog signal domain).

Optionally, the method further comprises: the OLT determines a second sub-band corresponding to a second rate, wherein the second rate is a transmission rate of second data, and the second data is data to be sent to a second ONU or the first ONU; the OLT generates a third signal, wherein the third signal is a signal carrying the second data, and the frequency of the third signal corresponds to the second sub-band; the OLT carries out combination processing on the second signal and the third signal to generate a fourth signal; and the OLT sending the second signal comprises: the OLT transmits the fourth signal.

Here, the "combining process" may also be referred to as a "combining process" or a "combining process".

In this application, the maximum transmission rate supported by the second ONU is different from the maximum transmission rate supported by the first ONU. That is, according to the above-described scheme, it is possible to simultaneously perform data transmission on two types of ONUs supporting different maximum transmission rates based on the same single-wavelength light.

Optionally, the second sub-band is a sub-band corresponding to a baseband (or baseband frequency), that is, the third signal is a baseband signal generated by performing modulation processing on the first data.

Or, in this case, the OLT generates the third signal by: and the OLT performs frequency conversion processing on a fifth signal to generate the third signal, wherein the fifth signal is a baseband signal generated by modulation processing of the second data.

Optionally, before the OLT sends the second signal, the method further includes: and the OLT sends first information to the first ONU, wherein the first information is used for indicating the corresponding relation between the first rate and the first sub-band.

Optionally, before the OLT sends the second signal, the method further includes: and the OLT sends second information, wherein the second information is used for indicating a sub-band corresponding to each transmission rate.

Optionally, the OLT determines a first sub-band corresponding to a first rate, including: the OLT determines a first sub-band corresponding to a first rate according to a first mapping relation, wherein the first mapping relation is used for indicating the corresponding relation between a plurality of sub-bands and a plurality of transmission rates.

Optionally, the sending, by the OLT, the second signal includes: transmitting the second signal for a first period of time; and the method further comprises: the OLT performs frequency conversion processing on a sixth signal to generate a seventh signal, where a frequency of the sixth signal corresponds to the first sub-band, the sixth signal is a baseband signal generated by modulating the third data, and the third data is data to be sent to a third ONU; the OLT transmits the seventh signal during a second time period, wherein the first time period is different from the second time period.

Therefore, by adopting the time division multiplexing mode, the OLT can communicate with different ONUs by using the same sub-frequency band, and the practicability of the application can be further improved.

In a second aspect, a method for optical communication is provided, and is applied to an optical communication system, where a frequency band corresponding to a single-wavelength light in the optical communication system is divided into multiple sub-frequency bands, and each sub-frequency band corresponds to a transmission rate, where the method includes: a first Optical Network Unit (ONU) acquires a second signal according to a first sub-band, wherein the frequency of the second signal corresponds to the first sub-band, the first sub-band corresponds to a first rate, the first rate is the transmission rate of first data carried by the second signal, and the first ONU supports the first rate; and the first ONU carries out frequency conversion processing on the second signal to generate a first signal and acquires the first data from the first signal, wherein the first signal is a baseband signal.

According to the scheme of the application, the frequency band of the single-wavelength light used by the PON system is divided into a plurality of sub-frequency bands, and each sub-frequency band is used for transmitting the data with one transmission rate, so that the ONU can select the corresponding sub-frequency band according to the rate supported by the ONU for receiving the data. Because the ONU can only receive data at one rate, the scheme provided by the application can avoid the condition that the ONU cannot normally work due to clock loss and the like caused by receiving data at other rates.

In the above implementation, the first sub-band does not include a frequency corresponding to a baseband, and thus, the first signal needs to be frequency-converted.

However, the present application is not limited thereto, and the first sub-band may include a frequency corresponding to a baseband, in which case, the first signal does not need to be frequency-converted, that is, in this case, the method includes: a first Optical Network Unit (ONU) acquires a first signal according to a first sub-band, wherein the frequency of the first signal corresponds to the first sub-band, the first sub-band corresponds to a first rate, the first rate is the transmission rate of first data carried by the first signal, and the first ONU supports the first rate; the first ONU acquires the first data from the first signal, which is a baseband signal.

Thus, the division of the self-band can be facilitated.

For example, the higher the rate corresponding to a sub-band, the closer the sub-band is located to the high-frequency side (or, in other words, the farther away from the baseband side).

Optionally, the acquiring, by the first ONU, the second signal according to the first sub-band includes: the first ONU acquires a second signal from a fourth signal according to a first sub-band, the fourth signal is generated after the second signal and a third signal are combined, the third signal is a signal carrying second data, the second data is data to be sent to a second ONU or the first ONU, the frequency of the third signal corresponds to the second sub-band, the second sub-band corresponds to a second rate, and the second rate is the transmission rate of the second data.

The "combining process" may also be referred to as a "combining process" or a "combining process".

For example, the first ONU may filter the fourth signal by using a filter corresponding to the frequency of the first sub-band, and further acquire the second signal.

Optionally, the maximum transmission rate supported by the second ONU is different from the maximum transmission rate supported by the first ONU.

Optionally, the second sub-band is a sub-band corresponding to a baseband, and the third signal is a baseband signal generated by performing modulation processing on the first data.

Or the third signal is generated after a fifth signal is subjected to frequency conversion processing, and the fifth signal is a baseband signal generated after the second data is subjected to modulation processing.

Optionally, the method further comprises: the first ONU receives first information, wherein the first information is used for indicating the corresponding relation between the first rate and the first sub-frequency band; and the first ONU determines the first sub-frequency band according to the first information.

Optionally, the method further comprises: the first ONU receives second information, wherein the second information is used for indicating a sub-band corresponding to each transmission rate; and the first ONU determines the first sub-frequency band according to the second information.

Optionally, the method further comprises: the first ONU determines a first sub-band according to a first mapping relation, wherein the first mapping relation is used for indicating the corresponding relation between a plurality of sub-bands and a plurality of transmission rates.

Optionally, the frequency conversion processing of the second signal by the first ONU includes: and the first ONU carries out frequency conversion processing on the first signal in an electric signal domain.

In a third aspect, an apparatus for optical communication is provided, which is applied to an optical communication system, a frequency band corresponding to single-wavelength light of the optical communication system is divided into a plurality of sub-frequency bands, and each sub-frequency band corresponds to a transmission rate, and the apparatus includes: a processing unit, configured to determine a first sub-band corresponding to a first rate, where the first rate is a transmission rate of first data, and the first data is data to be sent to a first optical network unit ONU, and is configured to perform frequency conversion processing on a first signal to generate a second signal, where a frequency of the second signal corresponds to the first sub-band, and the first signal is a baseband signal generated by modulating the first data; and the transceiving unit is used for transmitting the second signal.

Optionally, the processing unit is further configured to determine a second sub-band corresponding to a second rate, where the second rate is a transmission rate of second data, the second data is data to be sent to a second ONU or the first ONU, and is configured to generate a third signal, where the third signal is a signal carrying the second data, and a frequency of the third signal corresponds to the second sub-band, and is configured to combine the second signal and the third signal to generate a fourth signal; and the transceiver unit is configured to transmit the fourth signal.

Optionally, the processing unit is further configured to perform frequency conversion processing on a fifth signal to generate the third signal, where the fifth signal is a baseband signal generated by performing modulation processing on the second data.

Optionally, the transceiver unit is further configured to send first information to the first ONU, where the first information is used to indicate a correspondence between the first rate and the first sub-band.

Optionally, the transceiver unit is further configured to send second information, where the second information is used to indicate a subband corresponding to each transmission rate.

Optionally, the processing unit is further configured to determine a first subband corresponding to the first rate according to a first mapping relationship, where the first mapping relationship is used to indicate a correspondence relationship between multiple subbands and multiple transmission rates.

Optionally, the transceiver unit is configured to transmit the second signal in a first period; the processing unit is further configured to perform frequency conversion processing on a sixth signal to generate a seventh signal, where a frequency of the sixth signal corresponds to the first sub-band, the sixth signal is a baseband signal generated by modulating the third data, and the third data is data to be sent to a third ONU; the transceiver unit is further configured to transmit the seventh signal in a second time period, where the first time period is different from the second time period.

Optionally, the processing unit is specifically configured to perform frequency conversion processing on the first signal in an electrical signal domain.

In a fourth aspect, an apparatus for optical communication is provided, which is applied to an optical communication system, a frequency band corresponding to a single-wavelength light of the optical communication system is divided into a plurality of sub-bands, and each sub-band corresponds to a transmission rate, and the apparatus includes: a processing unit configured to determine a first sub-band corresponding to a first rate, the first rate being a transmission rate of first data carried by the second signal, and the first rate being supported by the apparatus; the transceiver unit is used for acquiring a second signal according to the first sub-band, wherein the frequency of the second signal corresponds to the first sub-band; the processing unit is further configured to perform frequency conversion processing on the second signal to generate a first signal, and obtain the first data from the first signal, where the first signal is a baseband signal.

Optionally, the processing unit is specifically configured to obtain a second signal from a fourth signal according to the first sub-band, where the fourth signal is generated after the second signal and the third signal are combined, the third signal is a signal carrying second data, the second data is data to be sent to a second ONU or the first ONU, a frequency of the third signal corresponds to the second sub-band, the second sub-band corresponds to a second rate, and the second rate is a transmission rate of the second data.

Optionally, the transceiver unit is further configured to receive first information, where the first information is used to indicate a correspondence between the first rate and the first sub-band; the processing unit is configured to determine the first sub-band according to the first information.

Optionally, the transceiver unit is further configured to receive second information, where the second information is used to indicate a sub-band corresponding to each transmission rate; the processing unit is configured to determine the first sub-band according to the second information.

Optionally, the processing unit is configured to determine the first subband according to a first mapping relationship, where the first mapping relationship is used to indicate a correspondence relationship between multiple subbands and multiple transmission rates.

Optionally, the processing unit is configured to perform frequency conversion processing on the first signal in an electrical signal domain.

In a fifth aspect, a communication device is provided that comprises means for performing the method of the first aspect or any one of the possible implementations of the first aspect.

In a sixth aspect, a communication device is provided that comprises means for performing the method of the second aspect or any one of its possible implementations.

In a seventh aspect, a communication device is provided, which comprises a processor, coupled with a memory, and operable to perform the method of the first aspect and its possible implementation. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

In one implementation, the communication device is an OLT. In this case, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip or a system of chips. In this case, the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or related circuit, etc. on the chip or system of chips. The processor may also be embodied as a processing circuit or a logic circuit.

In an eighth aspect, a communication device is provided that includes a processor. The processor is coupled to the memory and is operable to execute instructions in the memory to implement the method of the second aspect and its possible implementations. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In one implementation, the communication device is an ONU. In this case, the communication interface may be a transceiver, or an input/output interface. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In a ninth aspect, there is provided a communication apparatus comprising: input circuit, output circuit and processing circuit. The processing circuitry is configured to receive signals via the input circuitry and to transmit signals via the output circuitry such that the method of any possible implementation of the first or second aspect and aspects thereof is implemented.

In a specific implementation process, the communication device may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the signal output by the output circuit may be, for example and without limitation, output to and transmitted by a transmitter, and the input circuit and the output circuit may be different circuits or the same circuit, in which case the circuits function as the input circuit and the output circuit, respectively, at different times. The embodiment of the present application does not limit the specific implementation manner of the processor and various circuits.

In a tenth aspect, a processing apparatus is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory and may receive signals via the receiver and transmit signals via the transmitter to perform the method of any one of the possible implementations of the first or second aspect and aspects thereof.

Optionally, the number of the processors is one or more, and the number of the memories is one or more.

Alternatively, the memory may be integral to the processor or provided separately from the processor.

In a specific implementation process, the memory may be a non-transient memory, such as a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

It will be appreciated that the associated data interaction process, e.g., sending the indication information, may be a process of outputting the indication information from the processor, and receiving the capability information may be a process of receiving the input capability information from the processor. In particular, the data output by the processor may be output to a transmitter and the input data received by the processor may be from a receiver. The transmitter and receiver may be collectively referred to as a transceiver, among others.

The processor in the tenth aspect may be a chip, and may be implemented by hardware or software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated with the processor, located external to the processor, or stand-alone.

In an eleventh aspect, a processing apparatus is provided, which includes a communication interface configured to obtain data to be processed, and a processing circuit configured to process the data to be processed according to the method in the first aspect or any one of the possible implementation manners of the first aspect.

In a twelfth aspect, there is provided a processing apparatus comprising: a communication interface for transmitting indication information according to the method of the second aspect or any of its possible implementations, and processing circuitry for generating the indication information.

In a thirteenth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform the method of any of the possible implementations of the first or second aspect and aspects thereof.

In a fourteenth aspect, a computer-readable medium is provided, which stores a computer program (which may also be referred to as code, or instructions) that, when executed on a computer, causes the computer to perform the method of any of the possible implementations of the first or second aspect and aspects thereof described above.

In a fifteenth aspect, a communication system is provided, which includes the OLT and the ONU described above.

Drawings

Fig. 1 is a schematic diagram of an example of a communication system according to the present application.

Fig. 2 is a schematic diagram illustrating an example of correspondence between a plurality of sub-bands of single-wavelength light and a plurality of transmission rates according to the present application.

Fig. 3 is a schematic diagram of another example of correspondence between multiple sub-bands of single-wavelength light and multiple transmission rates according to the present application.

Fig. 4 is a schematic diagram of an example of the PON system according to the present application.

Fig. 5 is a schematic interaction diagram of an example of a data transmission process in the PON system shown in fig. 4.

Fig. 6 is a schematic diagram of an example of frequency conversion processing by the OLT according to the present application.

Fig. 7 is a schematic diagram of an example of the PON system according to the present application.

Fig. 8 is a schematic interaction diagram of an example of a data transmission procedure in the PON system shown in fig. 7.

Fig. 9 is a schematic block diagram of an apparatus for optical communication according to an embodiment of the present application.

Fig. 10 is another schematic block diagram of an apparatus for optical communication according to an embodiment of the present application.

Detailed Description

The technical solution of the embodiment of the present application may be applied to various communication systems that can transmit data using light, for example: for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD) System, a Universal Mobile telecommunications System (Universal Mobile telecommunications System, UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a fifth generation (5 g) System or a New Radio System (NR), a Device-Device (Device-to-Device) System, a future communication System, or a future communication System. For example, the optical communication network may be an access network in the communication system.

Fig. 1 is a schematic diagram of an example of an optical communication network to which the distance measuring method of the present application is applied. Wherein, the optical communication network may include but is not limited to a PON, as shown in fig. 1, the PON includes: OLT and ONU.

The PON uses a single fiber to connect to the OLT, which then connects to the ONUs. The ONU provides services such as data, interactive network television, voice and the like for users.

The OLT device and the ONU may be an optical-electrical integrated device.

The OLT (or OLT device) is a local side device, and may implement functions including, but not limited to:

1. the front-end (convergence layer) switch is connected with a network cable, converted into an optical signal and used for sending Ethernet data to an ONU (optical network unit) in a broadcasting mode;

2. initiating and controlling a distance measurement process, and recording distance measurement information;

3. and allocating bandwidth for the ONU, namely controlling the starting time and the sending window size of the ONU for sending data.

The ONU (or ONU device) is divided into an active optical network unit and a passive optical network unit. A device equipped with a network monitoring comprising an optical receiver, an upstream optical transmitter, a plurality of bridged amplifiers is generally called an optical node.

The ONU has two roles: selectively receiving the broadcast sent by the OLT, and receiving a response to the OLT if the data needs to be received; and collecting and caching the Ethernet data which needs to be sent by the user, and sending the cached data to the OLT end according to the distributed sending window.

Optionally, the ONU may comprise an ONT. Or, an ONU may be connected to one or more ONTs, so as to provide service to users through the ONTs.

The ONU can effectively improve the utilization rate of the uplink bandwidth of the whole system, can also configure the channel bandwidth according to the network application environment and the characteristics of the applicable service, bears the terminal users as many as possible under the condition of not influencing the communication efficiency and the communication quality, improves the network utilization rate and reduces the user cost.

Optionally, one or more optical splitters (Splitter) may be further disposed in the optical paths of the OLT and the ONU, or optical communication may be performed between the OLT and the ONU via the one or more optical splitters.

As with the cable transmission system, the optical network system also needs to couple, branch, and distribute optical signals, which requires an optical splitter to implement. An optical splitter, also called an optical splitter, is one of the most important passive devices in an optical fiber link, and is an optical fiber junction device having a plurality of input ends and a plurality of output ends, and usually, M × N is used to indicate that one splitter has M input ends and N output ends.

A frequency band corresponding to light (for example, light of a single wavelength or light of a certain wavelength among light of multiple wavelengths) used for optical communication between an optical communication system (for example, one OLT and a plurality of connected ONUs) of the present application may be divided into a plurality of sub-bands.

Also, in the present application, each sub-band may correspond to a rate (or transmission rate).

By way of example and not limitation, the frequency range of each of the plurality of sub-bands may be the same.

Alternatively, the frequency ranges of two sub-bands of the plurality of sub-bands may be different, for example, there may be at least two sub-bands of the plurality of sub-bands whose frequency ranges are different.

By way of example and not limitation, in this case, the frequency range of each sub-band may have a correspondence with the rate to which the sub-band corresponds. For example, the frequency range of a sub-band may have a positive correlation with the rate corresponding to the sub-band, i.e., the greater the rate corresponding to the sub-band, the greater the frequency range of the sub-band.

By way of example and not limitation, the scheme provided by the application can be applied to an optical communication system compatible with 10G PON ONUs, 25G PON ONUs and 50G PON ONUs. In this scheme, the transmission rates may include 10Gbps, 15Gbps, and 20Gbps, in which case, 25Gbps transmission may be achieved by a combination of 10Gbps transmission and 15Gbps transmission. Transmission at 50Gbps may be achieved by combining transmission at 10Gbps, transmission at 15Gbps, and transmission at 25 Gbps. Fig. 2 shows the correspondence of the transmission rate to the sub-band in this case.

By way of example and not limitation, the scheme provided by the application can be applied to an optical communication system compatible with 10G PON ONU and 10G PON Turbo (transmission rate of 12.44 Gbps). In this scheme, the transmission rate may include 10Gbps and 2.44Gbps, in which case, the 10G PON Turbo transmission may be jointly implemented by 10Gbps transmission and 2.44Gbps transmission. Fig. 3 shows the correspondence of the transmission rate to the sub-band in this case.

As shown in fig. 2 and 3, the sub-band corresponding to 10Gbps may be a baseband. Here, the baseband refers to a baseband. Baseband transmission is the transmission of electrical pulses of a digital signal directly in a line, which is the simplest transmission mode, i.e., the baseband signal can be transmitted directly without frequency conversion. Because the traditional 10G PON ONU uses a baseband for data transmission, the scheme according to the present application can be compatible with the prior art.

It should be understood that the rates used in the present application and the positions of the sub-bands corresponding to the respective rates are listed for illustrative purposes only, and the present application is not limited thereto, and for example, the rate corresponding to the baseband may be a rate other than 10 Gbps.

As shown in fig. 2 and 3, to avoid interference, two adjacent sub-bands may have a guard interval therebetween. The size of the guard interval may be arbitrarily adjusted as needed, and is not particularly limited in this application. In the present application, a guard interval may not be provided between two adjacent subbands, and the present application is not particularly limited.

In the present application, in order to ensure reliability and accuracy of communication, the correspondence between each sub-band and each transmission rate stored in the OLT and the ONU needs to be kept consistent.

By way of example and not limitation, the correspondence between each sub-band and each transmission rate held by the OLT and the ONU may be kept consistent in the present application in the following manner.

Mode 1

If one ONU (referred to as ONU # 1) performs communication using the rate #1, the side OLT can autonomously identify the sub-band #1 corresponding to the rate #1 and notify the ONU #1 of the correspondence relationship between the rate #1 and the sub-band #1.

By way of example and not limitation, the notification process may be performed during ONU #1 online or registration. Alternatively, the notification process may be performed by the OLT in a process of performing ranging or the like with respect to ONU #1, and the present application is not particularly limited.

And by way of example and not limitation, the notification process may be performed through a dedicated message of ONU #1.

Mode 2

The OLT may autonomously determine a correspondence between a plurality of transmission rates and a plurality of sub-bands in the system, and may notify each ONU in the system of the correspondence through, for example, a broadcast message, so that each ONU may determine the sub-band to be detected according to its own used rate.

Mode 3

The communication system or the communication protocol may specify the correspondence between the plurality of transmission rates and the plurality of sub-bands, so that the OLT and the ONUs may keep the correspondence between the stored sub-bands and the transmission rates consistent based on the specification of the communication system or the communication protocol.

Fig. 4 is a schematic diagram of an example of the PON system according to the present invention, and as shown in fig. 4, the optical communication system includes a 10GPON ONU (hereinafter, referred to as ONU # a for ease of understanding), a 25G PON ONU (hereinafter, referred to as ONU # B for ease of understanding), and a 50G PON ONU (hereinafter, referred to as ONU # C for ease of understanding).

Next, a data transmission process in the system shown in fig. 4 will be described in detail with reference to fig. 5.

As shown in fig. 5, in S110, the OLT generates data (hereinafter, referred to as data # a for ease of understanding and explanation) to be transmitted to the ONU # a, and the data # a may be data (e.g., bits) output from a Media Access Control (MAC) layer of the OLT.

Similarly, the OLT generates data that needs to be transmitted to the ONU # B (hereinafter, referred to as data # B for ease of understanding and explanation) and data that needs to be transmitted to the ONU # C (hereinafter, referred to as data # C for ease of understanding and explanation).

The OLT performs signal processing such as modulation processing on the data # a to generate a digital domain signal (or an electrical signal, hereinafter referred to as signal # a for ease of understanding and distinction) having a transmission rate of 10 Gbps. The signal # a may be a baseband signal. The sub-band corresponding to the rate of 10Gbps in this application (hereinafter, referred to as sub-band # a for ease of understanding and distinction) includes a baseband, i.e., the frequency of the signal # a is within the range of the sub-band # a.

The OLT performs signal processing such as modulation processing on the data # B to generate a digital domain signal (hereinafter referred to as signal # B for ease of understanding and distinction).

In the present application, the transmission rate of the signal # B may be 25Gbps, and hereinafter, for the convenience of understanding and distinction, the signal # B in this form is referred to as a signal # B1. The signal # B1 is a baseband signal.

Alternatively, the signal # B may include two parts, i.e., a digital domain signal having a transmission rate of 10Gbps (hereinafter, referred to as signal # B2 for easy understanding and distinction) and a digital domain signal having a transmission rate of 15Gbps (hereinafter, referred to as signal # B3 for easy understanding and distinction). The signal # B2 and the signal # B3 are baseband signals.

The OLT modulates the data # C to generate a digital domain signal (hereinafter referred to as signal # C for ease of understanding and distinction).

In the present application, the signal # C may include three parts, i.e., a digital domain signal having a transmission rate of 10Gbps (hereinafter, referred to as signal # C1 for easy understanding and distinction), a digital domain signal having a transmission rate of 15Gbps (hereinafter, referred to as signal # C2 for easy understanding and distinction), and a digital domain signal having a transmission rate of 25Gbps (hereinafter, referred to as signal # C3 for easy understanding and distinction). The signal # C1, the signal # C2, and the signal # C3 are baseband signals.

Thereafter, the OLT may perform a frequency conversion process on the signal # B.

Fig. 6 shows an exemplary process of the frequency conversion process of the present application, and as shown in fig. 6, a baseband signal is S (t), and a local oscillation source (or a local oscillation source) may be configured in the OLT to generate a local oscillation signal cos (f 1 × t), where f1 represents a target frequency (or a target center frequency) to be frequency-converted, and the baseband signal and the local oscillation signal are multiplied to obtain a frequency-converted signal, i.e., S (t)' cos (f 1 × t).

For example, when signal # B includes signal # B1, the OLT may determine a sub-band corresponding to a rate of 25Gbps (hereinafter, referred to as sub-band # c for ease of understanding and distinction), and frequency-convert signal # B1 into the range of sub-band # c.

For another example, when the signal # B includes the signal # B2 and the signal # B3, the OLT may determine a sub-band corresponding to a rate of 15Gbps (hereinafter, referred to as sub-band # B for ease of understanding and distinction), and frequency-convert the frequency of the signal # B3 into the range of the sub-band # B. In addition, since the rate of the signal # B2 is 10Gbps, the frequency of the signal # B2 is within the range of the sub-band # a.

The OLT may also perform frequency conversion processing on the signal # C.

That is, the OLT can frequency-convert the signal # C2 into the range of the sub-band # b.

And, the OLT may frequency-convert the signal # C3 into the range of the sub-band # C.

In addition, since the rate of the signal # C1 is 10Gbps, the frequency of the signal # C1 is within the range of the sub-band # a.

At S120, the OLT may perform a combining process (or, addition, superposition, power combining, signal combining, or the like) on the signal # a, the signal # B, and the signal # C.

For example, when the signal # B includes the signal # B1.

The signal # a and the signal # C1 may use the sub-band # a in a time division multiplexing manner. For example, signal # a and signal # C1 use sub-band # a in different time slots. Also, the time slots corresponding to the signal # a and the signal # C1 may be allocated and notified to the receiving end of the signal # a (i.e., ONU # a) and the receiving end of the signal # C1 (i.e., ONU # C) by the OLT. Hereinafter, the description of the same or similar cases will be omitted in order to avoid redundancy.

The signal # B1 and the signal # C3 may use the sub-band # C in a time division multiplexing manner. For example, signal # B1 and signal # C3 use subband # C in different time slots.

For another example, when the signal # B includes the signal # B2 and the signal # 3.

Signal # a, signal # B2, and signal # C1 may use sub-band # a in a time division multiplexing manner. For example, signal # a, signal # B2, and signal # C1 use sub-band # a in different time slots.

Signal # B3 and signal # C2 may use sub-band # B in a time division multiplexing manner. For example, signal # B3 and signal # C2 use sub-band # B in different time slots.

Accordingly, the OLT can synthesize signals in the sub-band # a, the sub-band # b, and the sub-band # c, and hereinafter, the synthesized signal is referred to as a signal # X for the convenience of understanding.

Thereafter, the OLT may perform, for example, digital-to-analog conversion processing (or electrical-to-optical conversion processing), optical domain modulation processing, and the like on the signal # X to generate an optical signal (hereinafter, referred to as signal # Y for ease of understanding and distinction), where the process may be similar to the prior art, and detailed description thereof is omitted here for avoiding redundant description.

At S130, the OLT transmits the signal # Y to ONU # a, ONU # B, and ONU # C through the optical network.

In S140, the ONU # a performs, for example, optical domain demodulation processing, analog-to-digital conversion (or optical-to-electrical conversion processing) on the signal # Y to recover the signal # X, wherein the process may be similar to the prior art, and detailed description thereof is omitted here for avoiding redundant description.

Since the signal # X includes the signal # a carried in the sub-band # a corresponding to the rate used by the ONU # a (or the supported rate), the ONU # a can accurately receive at least the signal # a on the sub-band # a.

Specifically, the ONU # a may obtain the signal # a on the sub-band # a through, for example, a Low Pass Filter (LPF) in a time slot (specifically, a time slot using the sub-band # a) allocated to the ONU # a by the OLT.

Thereafter, the ONU # a may perform processing such as Data Clock Recovery (CDR) at 10Gbps, data demodulation or decoding at 10Gbps on the signal # a, and obtain the Data # a.

In S150, the ONU # B performs, for example, optical domain demodulation processing, analog-to-digital conversion (or optical-to-electrical conversion processing) on the signal # Y to recover the signal # X, wherein the process may be similar to the prior art, and detailed description thereof is omitted here for avoiding redundant description.

Case 1

When the signal # B includes the signals # B2 and B3, the ONU # B may acquire the signal # B2 on the sub-band # a through, for example, a Low Pass Filter (LPF) on a time slot (specifically, a time slot using the sub-band # a) allocated to the ONU # B by the OLT. The ONU # B may acquire a signal # B3 in the sub-Band # B through, for example, a Band Pass Filter (BPF) in a time slot (specifically, a time slot using the sub-Band # B) allocated to the ONU # B by the OLT.

Alternatively, the ONU # B may perform frequency conversion processing on the signal # B3 to convert the signal # B3 into a baseband signal.

Fig. 6 shows an exemplary process of the frequency conversion processing of the present application, as shown in fig. 6, a signal received by an ONU is S (t) × cos (f 1 × t) =0.5 × [ S (t) + cos (f 1 × t) ], f1 represents a target frequency (or a target center frequency) to be frequency-converted, and cos (f 1 × t) generates a local oscillation signal for a local oscillation source configured in the ONU.

Then, the ONU # B may perform processing such as Clock and Data Recovery (CDR) at 10Gbps and Data demodulation or decoding at 10Gbps on the signal # B2 as a baseband signal, and obtain Data carried on the signal # B2, which is referred to as Data # B2.

Furthermore, the ONU # B may perform clock conversion processing based on the clock of 10Gbps acquired during the clock recovery process of the signal # B2 to generate a clock of 15Gbps, and may further perform processing such as data clock recovery of 15Gbps, data demodulation or decoding of 15Gbps, and the like on the signal # B3, thereby obtaining data carried on the signal # B3, which is referred to as data # B3.

Accordingly, the ONU # B can recover the data # B based on the data # B2 and the data # B3.

Case 2

When the signal # B includes the signal # B1, the ONU # B may acquire the signal # B1 on the sub-band # c through, for example, a low-pass filter, on a time slot (specifically, a time slot using the sub-band # c) allocated to the ONU # B by the OLT. The ONU # B may acquire the signal # B1 in the sub-band # c by, for example, a band-pass filter in a time slot (specifically, a time slot using the sub-band # c) allocated to the ONU # B by the OLT.

Alternatively, the ONU # B may perform frequency conversion processing on the signal # B1 to convert the signal # B1 into a baseband signal.

Thereafter, the ONU # B may perform processing such as data clock recovery at 25Gbps, data demodulation or decoding at 25Gbps on the signal # B1, and obtain data carried on the signal # B1, that is, the data # B.

At S160, the ONU # C performs, for example, optical domain demodulation processing, analog-to-digital conversion (or photoelectric conversion processing) on the signal # Y to recover the signal # X, where the process may be similar to the prior art, and a detailed description thereof is omitted here for avoiding redundancy.

The ONU # C may acquire the signal # C1 on the sub-band # a through, for example, a low-pass filter, at a time slot (specifically, a time slot using the sub-band # a) allocated to the ONU # C by the OLT. The ONU # C may acquire the signal # C2 in the sub-band # b by, for example, a band-pass filter in a time slot (specifically, a time slot using the sub-band # b) allocated to the ONU # C by the OLT. The ONU # C may acquire the signal # C3 in the sub-band # C by, for example, a band-pass filter in a time slot (specifically, a time slot using the sub-band # C) allocated to the ONU # C by the OLT.

Alternatively, the ONU # B may perform frequency conversion processing on the signals # C2 and # C3 to convert the signals # C2 and # C3 into baseband signals.

Thereafter, the ONU # C may perform processing such as data clock recovery at 10Gbps and data demodulation or decoding at 10Gbps on the signal # C1 as a baseband signal, and obtain data carried on the signal # C1, which is referred to as data # C1.

Furthermore, the ONU # B may perform clock conversion processing based on the clock of 10Gbps acquired during the clock recovery process of the signal # C1 to generate a clock of 15Gbps, and may further perform processing such as data clock recovery of 15Gbps, data demodulation or decoding of 15Gbps, and the like on the signal # C2, thereby obtaining data carried on the signal # C2, which is referred to as data # C2.

The ONU # B may perform clock conversion processing based on the clock of 10Gbps acquired in the clock recovery process for the signal # C1 to generate a clock of 25Gbps, and may further perform processing such as clock recovery of data of 25Gbps, demodulation or decoding of data of 25Gbps on the signal # C3, and further obtain data carried on the signal # C3, which is referred to as data # C3.

Thus, the ONU # B can recover the data # C based on the data # C1, the data # C2, and the data # C3.

Fig. 7 is a schematic diagram of an example of the PON system according to the present invention, and as shown in fig. 7, the optical communication system includes a 10GPON ONU (hereinafter, referred to as ONU #1 for ease of understanding) and a 10G PON Turbo (transmission rate 12.44 Gbps) ONU (hereinafter, referred to as ONU #2 for ease of understanding).

Next, a data transmission process in the system shown in fig. 7 will be described in detail with reference to fig. 8.

As shown in fig. 8, in S210, the OLT generates data (hereinafter, referred to as data #1 for ease of understanding and explanation) to be transmitted to the ONU #1, and the data #1 may be data (for example, bits) output from the media access control layer device of the OLT.

Similarly, the OLT generates data that needs to be transmitted to the ONU #2 (hereinafter, referred to as data #2 for ease of understanding and explanation).

The OLT performs signal processing such as modulation processing on the data #1 to generate a digital domain signal (or an electrical signal, hereinafter referred to as signal #1 for ease of understanding and distinction) having a transmission rate of 10 Gbps. Wherein, the signal #1 may be a baseband signal. The sub-band corresponding to the rate of 10Gbps (hereinafter, referred to as sub-band #1 for ease of understanding and distinction) in the present application includes a baseband, i.e., the frequency of the signal #1 is located within the range of the sub-band #1.

The OLT performs signal processing such as modulation processing on the data #2 to generate a digital domain signal (hereinafter referred to as signal #2 for ease of understanding and distinction).

In the present application, the transmission rate of this signal #2 may be 12.44Gbps.

The signal #2 may include two parts, i.e., a digital domain signal with a transmission rate of 10Gbps (hereinafter, referred to as signal #2A for easy understanding and distinction) and a digital domain signal with a transmission rate of 2.44Gbps (hereinafter, referred to as signal #2B for easy understanding and distinction). The signal #2A and the signal #2B are baseband signals.

Thereafter, the OLT may perform a frequency conversion process on signal #2B.

Specifically, the OLT may determine a sub-band corresponding to a rate of 2.44Gbps (hereinafter, referred to as sub-band #2 for ease of understanding and distinction), and frequency-convert the frequency of signal #2B into the range of sub-band #2. In addition, since the rate of the signal #2A is 10Gbps, the frequency of the signal #2A is within the range of the sub-band #1.

At S220, the OLT may perform a combining process (or, addition, superposition, power combining, signal combining, or the like) on the signal #1, the signal #2A, and the signal #2B.

For example, signal #1 and signal #2A may use sub-band #1 in a time division multiplexing manner. For example, signal #1 and signal #2A use sub-band #1 in different time slots. Also, the time slots corresponding to signal #1 and signal #2A may be allocated and notified to the receiving end of signal #1 (i.e., ONU # 1) and the receiving end of signal #2A (i.e., ONU # 2) by the OLT.

Thereafter, the OLT may combine signals in sub-band #1 and sub-band #2, and hereinafter, for convenience of understanding, the combined signal is referred to as signal # Z.

Thereafter, the OLT may perform, for example, digital-to-analog conversion processing (or electrical-to-optical conversion processing), optical domain modulation processing, and the like on the signal # Z to generate an optical signal (hereinafter, referred to as signal # W for ease of understanding and distinction), wherein the process may be similar to the prior art, and a detailed description thereof is omitted here for avoiding redundancy.

At S230, the OLT transmits the signal # W to ONU #1 and ONU #2 through the optical network.

In S240, the ONU #1 performs, for example, optical domain demodulation processing, analog-to-digital conversion (or optical-to-electrical conversion processing) on the signal # W to recover the signal # Z, wherein the process may be similar to the prior art, and detailed description thereof is omitted here for avoiding redundant description.

Since the signal # Z includes the signal #1 carried in the sub-band #1 corresponding to the rate used by the ONU #1 (or the supported rate), the ONU #1 can accurately receive at least the signal #1 on the sub-band #1.

Specifically, the ONU #1 may acquire the signal #1 on the sub-band #1 by, for example, a low-pass filter in a time slot (specifically, a time slot using the sub-band # 1) allocated to the ONU #1 by the OLT.

Thereafter, the ONU #1 may perform processing such as data clock recovery at 10Gbps, data demodulation or decoding at 10Gbps on the signal #1, and obtain the data #1.

In S250, the ONU #2 performs, for example, optical domain demodulation processing, analog-to-digital conversion (or photoelectric conversion processing) on the signal # W, and recovers the signal # Z.

Thereafter, ONU #2 can acquire signal #2A on subband #1 through, for example, a low-pass filter at a time slot (specifically, a time slot using subband # 1) allocated to ONU #2 by the OLT. And, ONU #2 can acquire signal #2B on sub-band #2 by, for example, a band-pass filter.

Alternatively, the ONU #2 may perform a frequency conversion process on the signal #2B to convert the signal #2B into a baseband signal.

Then, the ONU #2 may perform processing such as data clock recovery at 10Gbps and data demodulation or decoding at 10Gbps on the signal #2A as a baseband signal, and further obtain data carried on the signal #2A, which is referred to as data #2A.

Furthermore, the ONU #2 may perform clock conversion processing based on the clock of 10Gbps acquired during clock recovery of the signal #2A to generate a clock of 2.44Gbps, and may further perform processing such as data clock recovery of 2.44Gbps and data demodulation or decoding of 2.44Gbps on the signal #2B to acquire data carried on the signal #2B, which is referred to as data #2B.

Thus, the ONU #2 can recover the data #2 based on the data #2A and the data #2B.

It should be noted that the solution provided in the present application may also be applied to a multi-wavelength optical communication system, where a frequency band corresponding to one wavelength of light in the multi-wavelength optical communication system is divided into a plurality of sub-frequency bands. Moreover, the multiple sub-bands may have a corresponding relationship with multiple transmission rates, so that the OLT may select one sub-band from the multiple sub-bands based on the rate of the data to be transmitted, and perform data transmission with the ONU.

Fig. 9 is a schematic block diagram of an apparatus 300 for optical communication according to an embodiment of the present application. The apparatus 300 comprises a transceiver unit 310 and a processing unit 320. The transceiving unit 310 can communicate with the outside, and the processing unit 320 is used for data processing. The transceiving unit 310 may also be referred to as a communication interface or a communication unit.

Optionally, the apparatus 300 may further include a storage unit, which may be used to store instructions or/and data, and the processing unit 320 may read the instructions or/and data in the storage unit.

The apparatus 300 may be configured to perform the actions performed by the OLT in the above method embodiments, in this case, the apparatus 300 may be a communication device or a component configurable in the communication device, the transceiver 310 is configured to perform the operations related to transceiving of the OLT in the above method embodiments, and the processing unit 320 is configured to perform the operations related to processing on the OLT side in the above method embodiments.

Alternatively, the apparatus 300 may be configured to perform the actions performed by the ONU (e.g. ONU #1, ONU #2, ONU # a, ONU # B, or ONU # C) in the above method embodiments, in which case, the apparatus 300 may be a communication device or a component configurable in the communication device, the transceiver 310 is configured to perform the operations related to transceiving on the ONU side in the above method embodiments, and the processing unit 320 is configured to perform the operations related to processing on the ONU side in the above method embodiments.

As shown in fig. 10, the embodiment of the present application further provides an apparatus 400 for optical communication. The communication device 400 comprises a processor 410, the processor 410 is coupled with a memory 420, the memory 420 is used for storing computer programs or instructions or/and data, and the processor 410 is used for executing the computer programs or instructions and/or data stored by the memory 420, so that the method in the above method embodiment is executed.

Optionally, the communication device 400 includes one or more processors 410.

Optionally, as shown in fig. 10, the communication apparatus 400 may further include a memory 420.

Optionally, the communication device 400 may include one or more memories 420.

Alternatively, the memory 420 may be integrated with the processor 410 or separately provided.

Optionally, as shown in fig. 10, the wireless communication apparatus 400 may further include a transceiver 430, and the transceiver 430 is used for receiving and/or transmitting signals. For example, processor 410 may be configured to control transceiver 730 to receive and/or transmit signals.

As a solution, the communication apparatus 400 is used to implement the operations performed by the OLT in the above method embodiments.

For example, the processor 410 is configured to implement the processing-related operations performed by the OLT in the above method embodiments, and the transceiver 430 is configured to implement the transceiving-related operations performed by the OLT in the above method embodiments.

Alternatively, the communication apparatus 400 is configured to implement the operations performed by the ONU (e.g., ONU #1, ONU #2, ONU # a, ONU # B, or ONU # C) in the above method embodiments.

For example, the processor 410 is configured to implement the processing-related operations performed by the terminal device in the above method embodiments, and the transceiver 430 is configured to implement the transceiving-related operations performed by the ONU in the above method embodiments.

Embodiments of the present application also provide a computer-readable storage medium on which computer instructions for implementing the method performed by the first device or the method performed by the first device in the above-described method embodiments are stored.

Embodiments of the present application also provide a computer-readable storage medium on which computer instructions for implementing the method performed by the second device or the method performed by the second device in the above-described method embodiments are stored.

Embodiments of the present application further provide a computer program product, where the computer program, when executed by a computer, enables the computer to implement the method performed by the first device in the foregoing method embodiments.

Embodiments of the present application further provide a computer program product, where the computer program, when executed by a computer, enables the computer to implement the method performed by the second device in the above method embodiments.

An embodiment of the present application further provides a communication system, where the communication system includes the first device and the second device in the foregoing embodiments.

As an example, the communication system includes: the OLT and the ONUs in the above embodiments.

For the explanation and beneficial effects of the related contents in any wireless communication device, reference may be made to the corresponding method embodiments provided above, and details are not repeated here.

In an embodiment of the present application, a communication device may include a hardware layer, an operating system layer running above the hardware layer, and an application layer running above the operating system layer. The hardware layer may include hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system of the operating system layer may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer may include applications such as a browser, an address book, word processing software, and instant messaging software.

The embodiment of the present application does not particularly limit a specific structure of an execution subject of the method provided by the embodiment of the present application, as long as communication can be performed by the method provided by the embodiment of the present application by running a program in which codes of the method provided by the embodiment of the present application are recorded. For example, the execution subject of the method provided by the embodiment of the present application may be a terminal device or a satellite, or a functional module capable of calling a program and executing the program in the terminal device or the satellite.

Various aspects or features of embodiments of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disk, floppy disk, or magnetic strips), optical disks (e.g., compact Disk (CD), digital Versatile Disk (DVD), or the like), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, or key drive, or the like).

Various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, but is not limited to: wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

It should be understood that the processor referred to in the embodiments of the present application may be a Central Processing Unit (CPU), and may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) 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.

It will also be appreciated that the memory referred to in the embodiments of the application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM). For example, RAM can be used as external cache memory. By way of example and not limitation, RAM may include the following forms: static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and direct bus RAM (DR RAM).

It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, the memory (memory module) may be integrated into the processor.

It should also be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present application.

It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the embodiments of the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solutions of the embodiments of the present application, which are essential or part of the technical solutions contributing to the prior art, may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope disclosed in the embodiments of the present application, and all the changes or substitutions should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An optical communication method applied to an optical communication system, wherein a frequency band corresponding to a single-wavelength light of the optical communication system is divided into a plurality of sub-frequency bands, and each sub-frequency band corresponds to a transmission rate, the method comprising:

the method comprises the steps that an Optical Line Terminal (OLT) determines a first sub-band corresponding to a first rate, wherein the first rate is the transmission rate of first data, and the first data is data to be sent to a first Optical Network Unit (ONU);

the OLT carries out frequency conversion processing on a first signal to generate a second signal, wherein the frequency of the second signal corresponds to the first sub-frequency band, and the first signal is a baseband signal generated by modulating the first data;

the OLT transmits the second signal.

2. The method of claim 1, further comprising:

the OLT determines a second sub-band corresponding to a second rate, wherein the second rate is a transmission rate of second data, and the second data is data to be sent to a second ONU or the first ONU;

the OLT generates a third signal, wherein the third signal is a signal carrying the second data, and the frequency of the third signal corresponds to the second sub-band;

the OLT carries out combination processing on the second signal and the third signal to generate a fourth signal; and

the OLT sends the second signal, including:

the OLT transmits the fourth signal.

3. The method of claim 2, wherein the maximum transmission rate supported by the second ONU is different from the maximum transmission rate supported by the first ONU.

4. The method according to claim 2 or 3, wherein the second sub-band is a sub-band corresponding to a baseband, and the third signal is a baseband signal generated by modulating the first data; or alternatively

The OLT generates a third signal comprising: and the OLT performs frequency conversion processing on a fifth signal to generate the third signal, wherein the fifth signal is a baseband signal generated by modulation processing of the second data.

5. The method according to any of claims 1 to 3, wherein before the OLT transmits the second signal, the method further comprises:

and the OLT sends first information to the first ONU, wherein the first information is used for indicating the corresponding relation between the first rate and the first sub-frequency band.

6. A method according to any of claims 1 to 3, wherein before the OLT sends the second signal, the method further comprises:

and the OLT sends second information, wherein the second information is used for indicating a sub-band corresponding to each transmission rate.

7. The method of any of claims 1 to 3, wherein the OLT determines a first sub-band corresponding to a first rate comprising:

the OLT determines a first sub-band corresponding to a first rate according to a first mapping relation, wherein the first mapping relation is used for indicating the corresponding relation between a plurality of sub-bands and a plurality of transmission rates.

8. The method of any of claims 1 to 3, wherein the OLT transmits the second signal comprising:

transmitting the second signal for a first period of time; and

the method further comprises the following steps:

the OLT performs frequency conversion processing on a sixth signal to generate a seventh signal, wherein the frequency of the sixth signal corresponds to the first sub-frequency band, the sixth signal is a baseband signal generated by modulating third data, and the third data is data to be sent to a third ONU;

the OLT transmits the seventh signal during a second time period, wherein the first time period is different from the second time period.

9. The method according to any of claims 1 to 3, wherein the OLT applies a frequency conversion process to the first signal, comprising:

and the OLT carries out frequency conversion processing on the first signal in an electric signal domain.

10. The method according to any one of claims 1 to 3, wherein the plurality of sub-bands comprises at least two sub-bands with different frequency ranges.

11. An optical communication method applied to an optical communication system, wherein a frequency band corresponding to a single-wavelength light of the optical communication system is divided into a plurality of sub-frequency bands, and each sub-frequency band corresponds to a transmission rate, the method comprising:

a first Optical Network Unit (ONU) acquires a second signal according to a first sub-band, wherein the frequency of the second signal corresponds to the first sub-band, the first sub-band corresponds to a first rate, the first rate is the transmission rate of first data carried by the second signal, and the first ONU supports the first rate;

and the first ONU carries out frequency conversion processing on the second signal to generate a first signal and acquires the first data from the first signal, wherein the first signal is a baseband signal.

12. The method of claim 11, wherein the first ONU acquiring the second signal according to the first sub-band comprises:

the first ONU acquires a second signal from a fourth signal according to a first sub-band, the fourth signal is generated after the second signal and a third signal are combined, the third signal is a signal carrying second data, the second data is data to be sent to a second ONU or the first ONU, the frequency of the third signal corresponds to the second sub-band, the second sub-band corresponds to a second rate, and the second rate is the transmission rate of the second data.

13. The method of claim 12, wherein the maximum transmission rate supported by the second ONU is different from the maximum transmission rate supported by the first ONU.

14. The method according to claim 12 or 13, wherein the second sub-band is a sub-band corresponding to a baseband, and the third signal is a baseband signal generated by modulating the first data; or

The third signal is generated after a fifth signal is subjected to frequency conversion processing, and the fifth signal is a baseband signal generated after the second data is subjected to modulation processing.

15. The method according to any one of claims 11 to 13, further comprising:

the first ONU receives first information, wherein the first information is used for indicating the corresponding relation between the first rate and the first sub-frequency band;

and the first ONU determines the first sub-frequency band according to the first information.

16. The method according to any one of claims 11 to 13, further comprising:

the first ONU receives second information, wherein the second information is used for indicating a sub-band corresponding to each transmission rate;

and the first ONU determines the first sub-frequency band according to the second information.

17. The method according to any one of claims 11 to 13, further comprising:

the first ONU determines a first sub-band according to a first mapping relation, wherein the first mapping relation is used for indicating the corresponding relation between a plurality of sub-bands and a plurality of transmission rates.

18. The method according to any of claims 11 to 13, wherein the first ONU performs frequency conversion processing on the second signal, comprising:

and the first ONU carries out frequency conversion processing on the first signal in an electric signal domain.

19. The method according to any one of claims 11 to 13, wherein the plurality of sub-bands comprises at least two sub-bands with different frequency ranges.

20. An optical communication apparatus applied to an optical communication system, wherein a frequency band corresponding to a single-wavelength light of the optical communication system is divided into a plurality of sub-bands, and each sub-band corresponds to a transmission rate, the apparatus comprising:

a processing unit, configured to determine a first sub-band corresponding to a first rate, where the first rate is a transmission rate of first data, the first data is data to be sent to a first optical network unit, ONU, and is configured to perform frequency conversion processing on a first signal to generate a second signal, where a frequency of the second signal corresponds to the first sub-band, and the first signal is a baseband signal generated by performing modulation processing on the first data;

and the transceiving unit is used for transmitting the second signal.

21. The apparatus of claim 20, wherein the processing unit is further configured to determine a second sub-band corresponding to a second rate, the second rate is a transmission rate of second data, the second data is data to be sent to a second ONU or the first ONU, and is configured to generate a third signal, the third signal is a signal carrying the second data, and a frequency of the third signal corresponds to the second sub-band and is configured to combine the second signal and the third signal to generate a fourth signal; and

the transceiver unit is configured to transmit the fourth signal.

22. The apparatus of claim 21, wherein the processing unit is further configured to perform frequency conversion processing on a fifth signal to generate the third signal, and the fifth signal is a baseband signal generated by modulation processing of the second data.

23. The apparatus according to any of claims 20 to 22, wherein the transceiver unit is further configured to send first information to the first ONU, and wherein the first information is configured to indicate a correspondence between the first rate and the first sub-band.

24. The apparatus according to any of claims 20 to 22, wherein the transceiver unit is further configured to send second information, and the second information is used to indicate a sub-band corresponding to each transmission rate.

25. The apparatus according to any of claims 20 to 22, wherein the processing unit is further configured to determine a first subband corresponding to a first rate according to a first mapping, the first mapping indicating a correspondence between a plurality of subbands and a plurality of transmission rates.

26. The apparatus according to any of the claims 20 to 22, wherein the transceiver unit is configured to transmit the second signal during a first time period;

the processing unit is further configured to perform frequency conversion processing on a sixth signal to generate a seventh signal, where a frequency of the sixth signal corresponds to the first sub-band, the sixth signal is a baseband signal generated by performing modulation processing on third data, and the third data is data to be sent to a third ONU;

the transceiver unit is further configured to transmit the seventh signal in a second time period, where the first time period is different from the second time period.

27. The device according to any of the claims 20 to 22, wherein the processing unit is specifically configured to frequency-convert the first signal in the electrical signal domain.

28. An optical communication apparatus applied to an optical communication system, wherein a frequency band corresponding to a single wavelength of light of the optical communication system is divided into a plurality of sub-bands, and each sub-band corresponds to a transmission rate, the apparatus comprising:

a processing unit configured to determine a first sub-band corresponding to a first rate, the first rate being a transmission rate of first data carried by a second signal, and the first rate being supported by the apparatus;

a transceiver unit, configured to obtain the second signal according to the first sub-band, where a frequency of the second signal corresponds to the first sub-band;

the processing unit is further configured to perform frequency conversion processing on the second signal to generate a first signal, and obtain the first data from the first signal, where the first signal is a baseband signal.

29. The apparatus according to claim 28, wherein the processing unit is specifically configured to obtain the second signal from a fourth signal according to a first sub-band, the fourth signal is generated after the second signal and a third signal are combined, the third signal is a signal carrying second data, the second data is data to be sent to a second ONU or the first ONU, a frequency of the third signal corresponds to a second sub-band, the second sub-band corresponds to a second rate, and the second rate is a transmission rate of the second data.

30. The apparatus according to claim 28 or 29, wherein the transceiver unit is further configured to receive first information, where the first information is used to indicate a correspondence relationship between the first rate and the first sub-band;

the processing unit is configured to determine the first sub-band according to the first information.

31. The apparatus according to claim 28 or 29, wherein the transceiver unit is further configured to receive second information, where the second information is used to indicate a sub-band corresponding to each transmission rate;

the processing unit is configured to determine the first sub-band according to the second information.

32. The apparatus according to any of claims 28 to 29, wherein the processing unit is configured to determine the first subband according to a first mapping indicating a correspondence between a plurality of subbands and a plurality of transmission rates.

33. The apparatus according to any one of claims 28 to 29, wherein the processing unit is configured to frequency convert the first signal in an electrical signal domain.

34. A communications apparatus comprising a processor coupled to a memory, the memory configured to store a computer program or instructions, the processor configured to execute the computer program or instructions in the memory such that

The method of any one of claims 1 to 10 being performed, or

The method of any one of claims 11 to 19 being performed.

35. The apparatus of claim 34, wherein the memory is integrated in the processor.

36. The device of claim 34 or 35, wherein the communication device is a chip.

37. A computer-readable storage medium, characterized in that a computer program or instructions for implementing

The method of any one of claims 1 to 10, or

The method of any one of claims 11 to 19.

38. A chip system, comprising: a communication interface for acquiring data to be processed and processing circuitry for processing the data to be processed according to the method of any of claims 1 to 10.

39. A chip system, comprising: a communication interface for transmitting indication information according to the method of any of claims 11 to 19, and a processing circuit for generating the indication information.