WO2019080449A1 - 无线通信方法及设备 - Google Patents

无线通信方法及设备

Info

Publication number
WO2019080449A1
WO2019080449A1 PCT/CN2018/081015 CN2018081015W WO2019080449A1 WO 2019080449 A1 WO2019080449 A1 WO 2019080449A1 CN 2018081015 W CN2018081015 W CN 2018081015W WO 2019080449 A1 WO2019080449 A1 WO 2019080449A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
frequency band
receiving
band
transmitting
Prior art date
Application number
PCT/CN2018/081015
Other languages
English (en)
French (fr)
Inventor
韩充
丁庆
Original Assignee
深圳市太赫兹科技创新研究院有限公司
深圳市太赫兹科技创新研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市太赫兹科技创新研究院有限公司, 深圳市太赫兹科技创新研究院 filed Critical 深圳市太赫兹科技创新研究院有限公司
Publication of WO2019080449A1 publication Critical patent/WO2019080449A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/401—Circuits for selecting or indicating operating mode
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a wireless communication method and device.
  • the widely used wireless communication technology uses a 2.4 GHz to 5 GHz carrier spectrum to achieve faster wireless transmission.
  • current communication technologies are less efficient in communication and are unable to meet the growing communication needs of people.
  • a method of wireless communication comprising:
  • the request sending signal is transmitted through the electromagnetic wave of the first frequency band
  • the response signal is transmitted through the electromagnetic wave of the second frequency band;
  • the data transmission is performed by electromagnetic waves of the second frequency band; wherein, the frequency of the electromagnetic wave of the second frequency band is higher than the frequency of the electromagnetic wave of the first frequency band.
  • the frequency of the electromagnetic wave in the second frequency band is higher than the frequency of the electromagnetic wave in the first frequency band.
  • the request sending signal sent by the transmitting end to the receiving end in the first frequency band can be transmitted to the receiving end in time to attempt to establish a network connection with the receiving end in time. Then, after receiving the response signal at the transmitting end, the network between the transmitting end and the receiving end is successfully established.
  • the transmitting end transmitting the data signal in the second frequency band to the receiving end can be quickly transmitted to the receiving end. Therefore, in the above wireless communication process, the transmitting end can efficiently transmit data to the receiving end.
  • the step of transmitting a request to send signal to the receiving end is: sending a request sending signal to the receiving end by all the communication nodes in the receiving range.
  • the method further comprises: resending the request transmission signal when the response signal from the receiving end is not received within a preset time after transmitting the request transmission signal.
  • the step of performing data transmission with the receiving end includes:
  • the acknowledgment signal After receiving the acknowledgment signal from the receiving end, continuing to send the next data signal to the receiving end; the acknowledgment signal is transmitted through the electromagnetic wave of the second frequency band.
  • the frequency of the electromagnetic wave in the first frequency band is 2.4 GHz or 5 GHz
  • the electromagnetic wave in the second frequency band is an electromagnetic wave in a millimeter wave band or a terahertz band.
  • a method of wireless communication comprising:
  • the request sending signal is transmitted through an electromagnetic wave in a first frequency band
  • the response signal is transmitted through electromagnetic waves in a second frequency band;
  • the data signal is transmitted by the electromagnetic wave of the second frequency band; wherein a frequency of the second frequency band is higher than that of the first frequency band frequency.
  • the step of receiving a request to send signal from a transmitting end is: receiving a request sending signal from a plurality of transmitting ends;
  • the step of sending a response signal to the sending end further includes:
  • the step of receiving the data signal sent by the transmitting end and the data transmission by the transmitting end includes:
  • the acknowledgment signal is transmitted through an electromagnetic wave of a second frequency band
  • the frequency of the electromagnetic wave in the first frequency band is 2.4 GHz or 5 GHz
  • the electromagnetic wave in the second frequency band is an electromagnetic wave in a millimeter wave band or a terahertz band.
  • the frequency of the electromagnetic wave in the second frequency band is higher than the frequency of the electromagnetic wave in the first frequency band.
  • the request transmission signal in the first frequency band can be transmitted to the wireless communication device in time, and the network connection is established with the sender at the same time.
  • the wireless communication device After receiving the request to send signal, the wireless communication device sends a response signal of the second frequency band to indicate that a network connection can be established with the transmitting end.
  • the response signal in the second frequency band can be quickly transmitted to the transmitting end. This will shorten the time it takes to set up the network.
  • the data signal in the second frequency band can be quickly transmitted to the receiving end. Thereby facilitating efficient transmission of data between the wireless communication device and the transmitting end.
  • a wireless communication device comprising:
  • a first multi-band transceiver for transmitting electromagnetic waves of a first frequency band, and for receiving and/or transmitting electromagnetic waves of a second frequency band;
  • a first controller configured to control the first multi-band transceiver to send a request sending signal to the receiving end, and control the first multi-band transceiver to receive a response signal from the receiving end and control the first multi-band transceiver and
  • the receiving end performs data transmission; wherein the request sending signal is transmitted through an electromagnetic wave in a first frequency band; the response signal is transmitted through an electromagnetic wave in the second frequency band; and the data transmission is performed by using electromagnetic waves in the second frequency band
  • the frequency of the electromagnetic wave in the second frequency band is higher than the frequency of the electromagnetic wave in the first frequency band.
  • a wireless communication device comprising:
  • a second multi-band transceiver for receiving electromagnetic waves in the first frequency band and for transmitting electromagnetic waves in the second frequency band;
  • a second controller configured to control the second multi-band transceiver to receive a request sending signal from the transmitting end, control the second multi-band transceiver to send a response signal to the sending end, and send the sending end to send
  • the data signal is transmitted with the transmitting end; wherein the request sending signal is transmitted through an electromagnetic wave in a first frequency band; the response signal is transmitted through an electromagnetic wave in a second frequency band; and the data signal passes through the second frequency band Electromagnetic wave transmission; the frequency of the second frequency band is higher than the frequency of the first frequency band.
  • FIG. 1 is a schematic diagram of a wireless communication system of an embodiment
  • FIG. 2 is a schematic diagram of a wireless communication system of another embodiment
  • FIG. 3 is a schematic diagram of data transmission by the wireless communication system of the embodiment shown in FIG. 2;
  • FIG. 4 is a schematic diagram of inconsistency between a GHz channel and a THz channel in a case where a wireless communication system times out;
  • FIG. 5 is a schematic diagram of a wireless communication method of the first embodiment
  • FIG. 6 is a schematic flowchart of a wireless communication method according to a second embodiment
  • FIG. 7 is a schematic flowchart diagram of a wireless communication method according to a third embodiment.
  • FIG. 8 is a schematic flow chart of a wireless communication method according to a fourth embodiment.
  • the transmitting end sends data, and the receiving end receives the data sent by the transmitting end, thus completing the communication at this moment.
  • the transmitting end is not limited to transmitting data, and may also receive data.
  • the receiving end is not limited to receiving data, and can also transmit data. That is, in the whole process of communication between the transmitting end and the receiving end, an interactive communication process is between the transmitting end and the receiving end.
  • a wireless communication system 100 includes two wireless communication devices.
  • a wireless communication device can function as the transmitting end 110.
  • Another wireless communication device can serve as the receiving end 120.
  • the transmitting end 110 includes a first controller 111 and a first multi-band transceiver 112.
  • the receiving end 120 includes a second controller 121 and a second multi-band transceiver 122.
  • the first multi-band transceiver 112 is configured to transmit electromagnetic waves of the first frequency band, and is also used for receiving and/or transmitting electromagnetic waves of the second frequency band.
  • the first controller 111 is configured to control the first multi-band transceiver 112 to send a request transmission signal to the receiving end.
  • the first controller 111 controls the first multi-band transceiver 112 to receive the response signal from the receiving end and controls the first multi-band transceiver 112 to perform data transmission with the receiving end.
  • the request sending signal is transmitted through the electromagnetic wave of the first frequency band.
  • the response signal is transmitted through electromagnetic waves in the second frequency band. Data transmission takes place via electromagnetic waves in the second frequency band.
  • the frequency of the electromagnetic wave in the second frequency band is higher than the frequency of the electromagnetic wave in the first frequency band.
  • the second multi-band transceiver 122 is configured to receive electromagnetic waves in the first frequency band and also to transmit electromagnetic waves in the second frequency band.
  • the second controller 121 is configured to control the second multi-band transceiver 122 to receive the request sending signal from the transmitting end, control the second multi-band transceiver 122 to send the response signal to the transmitting end, and receive the data signal sent by the transmitting end and the transmitting end.
  • Data transfer The request transmission signal is transmitted through electromagnetic waves in the first frequency band.
  • the response signal is transmitted through the electromagnetic wave of the second frequency band; the data signal is transmitted through the electromagnetic wave of the second frequency band.
  • the frequency of the second frequency band is higher than the frequency of the first frequency band.
  • the first multi-band transceiver 112 is first controlled by the first controller 111 to send a request sending signal to the receiving end 120.
  • the transmitting end 110 transmits a request transmission signal to the receiving end 120 through all the communication nodes within the receiving range. Since the frequency of the request transmission signal is in the first frequency band, the transmission loss of the request transmission signal is small, and the transmission range is wide. In this way, all the communication nodes in the transmission range of the transmitting end 110 can receive the request sending signal, and ensure that the request sending signal is transmitted by the multiple communication nodes to the receiving end 120, so that the request sending signal can be transmitted to the receiving end in time. 120. That is, the transmitting end 110 can efficiently find the receiving end 120 by transmitting a signal through the request of the first frequency band.
  • the request to send signal may be transmitted in a request-to-send (RTS).
  • the second multi-band transceiver 122 is configured to receive a request to transmit signal.
  • the second controller 121 controls the second multi-band transceiver 122 to the transmitting end 110 in the case where it is determined that the data signal corresponding to the request transmission signal is received, that is, in the case where it is determined that the receiving end 120 is the receiving object specified by the transmitting end 110.
  • the response signal is sent, and the signal in the second frequency band has a higher transmission rate, so that the response signal can be quickly transmitted to the transmitting end 110.
  • the receiving end 120 waits for a possible RTS frame through the second multi-band transceiver 122.
  • the second multi-band transceiver 122 may receive RTS frames of multiple transmitters at the same time.
  • the second controller 121 processes the received RTS frame to determine whether it is the receiving object specified by the sending end 110, that is, whether the direction in which the transmitting end 110 sends data is the receiving end 120 receiving data. The main direction.
  • the second controller 121 controls the second multi-band transceiver 122 to send a response signal to the transmitting end 110 to notify the transmitting end 110 that the receiving end 120 has already done, in the case that the receiving end 120 is the receiving object specified by the transmitting end 110. Ready to accept the data.
  • the response signal in the second frequency band has a higher transmission rate and can be quickly transmitted to the transmitting end 110.
  • the response signal is transmitted in a response frame (Test-To-Send, abbreviated as TTS).
  • the second controller 121 is further configured to compare the strengths of all the RTS frames, and use the direction of the transmitting end corresponding to the strongest request transmission signal as the main direction.
  • the second controller 121 controls the second multi-band transceiver 122 to transmit a response signal in the second frequency band to the transmitting end 110.
  • the second controller 121 analyzes the intensities of the plurality of RTS frames, and selects the signal direction of the strongest RTS frame as the main direction.
  • the second multi-band transceiver 122 will send the TTS frame, which means that the transmitting end 110 can establish a connection with the receiving end 120. .
  • the TTS frame is transmitted according to the signal of the strongest RTS frame, so that the networking between the transmitting end 110 and the receiving end 120 can be performed in an orderly manner to avoid confusion.
  • the first controller 111 controls the first multi-band transceiver 112 to transmit a data signal to the receiving end 120 when the first multi-band transceiver 112 receives the response signal, and the signal in the second frequency band has a higher transmission rate.
  • the data signal in the second frequency band can be efficiently transmitted to the receiving end 120.
  • the first multi-band transceiver 112 receives the TTS frame, indicating that the receiving end 120 can receive data.
  • the first controller 111 controls the first multi-band transceiver 112 to transmit a data signal in the second frequency band to the receiving end 120 to efficiently transmit the data signal to the receiving end 120.
  • the frequency of the request transmission signal sent by the first multi-band transceiver 112 of the transmitting end 110 to the receiving end 120 is in the first frequency band, so that the request transmission signal can be transmitted to the receiving end 120 in time.
  • the first multi-band transceiver 112 of the receiving end 120 sends a response signal of the second frequency band to indicate that a network connection can be established between the transmitting end 110 and the receiving end 120.
  • the response signal in the second frequency band can be quickly transmitted to the transmitting end 110. This will shorten the time it takes to set up the network.
  • the network between the transmitting end 110 and the receiving end 120 is successfully established, and the first multi-band transceiver 112 of the transmitting end 110 sends a data signal to the receiving end 120, and is in the second frequency band.
  • the data signal within can be quickly transmitted to the receiving end 120. Therefore, the transmitting end 110 of the above wireless communication system 100 can efficiently transmit data to the receiving end 120.
  • the signal of the first frequency band is a signal of a frequency band of 2.4 GHz or 5 GHz
  • the signal of the second frequency band is a signal of a millimeter wave band or a terahertz band.
  • the request signal of the first frequency band transmitted by the first multi-band transceiver 112 is used to efficiently establish a network.
  • the second multi-band transceiver 122 can increase the signal transmission rate by transmitting the response signal of the second frequency band and the data signal of the second multi-band transmitted by the first multi-band transceiver 112, so that the wireless communication system 100 can efficiently transmit data.
  • the first multi-band transceiver includes a first frequency band first transceiver 212 and a second frequency band first transceiver 213.
  • the second multi-band transceiver includes a first frequency band second transceiver 222 and a second frequency band second transceiver 223.
  • the first frequency band first transceiver 212 can transmit and receive electromagnetic waves of the first frequency band.
  • the first frequency band first transceiver 212 is configured to transmit a request to transmit signal.
  • the second frequency band first transceiver 213 can transmit and receive electromagnetic waves of the second frequency band.
  • the second frequency band first transceiver 212 is configured to receive the response signal of the second frequency band and transmit the data signal of the second frequency band.
  • the first frequency band second transceiver 222 can transmit and receive electromagnetic waves of the first frequency band.
  • the first frequency band second transceiver 222 is configured to receive a request transmission signal of the first frequency band.
  • the second frequency band second transceiver 223 can transmit and receive electromagnetic waves of the second frequency band.
  • the second frequency band second transceiver 223 is configured to send a response signal of the second frequency band and receive the data signal of the second frequency band.
  • the first frequency band first transceiver 212 and the first frequency band second transceiver 222 may be a multi-directional 2.4 GHz or 5 GHz transceiver (referred to as a GHz transceiver), and the signal generated in the first frequency band is 2.4. Low-band signals in the GHz or 5 GHz band.
  • the GHz transceiver controls a multi-directional 2.4 GHz or 5 GHz antenna, ie the GHz transceiver controls the multi-directional GHz antenna, and the GHz transceiver transmits or receives the corresponding low-band signal through the GHz antenna.
  • the low-band signal in the 2.4 GHz or 5 GHz band has a small transmission loss and a large transmission range, and the request transmission signal can be transmitted to the receiving terminal 220 in time.
  • the second frequency band first transceiver 213 and the second frequency band second transceiver 223 are both exemplified by millimeter wave and terahertz antennas (THz transceivers).
  • the THz transceiver controls a terahertz antenna array (THz antenna array), and the THz transceiver transmits or receives signals in the millimeter wave or terahertz band through the THz antenna array.
  • the millimeter wave or terahertz band has a wider available channel and can transmit data at high speeds with theoretical rates up to 100 Gpbs or even 1 Tpbs.
  • the THz antenna array uses beamforming technology to form a narrow transmission signal, which can improve the gain of the signal.
  • the THz transceiver can achieve efficient transmission of response signals and data signals.
  • the first multi-band transceiver or the second multi-band transceiver can be seamlessly switched in the 2.4/5 GHz band and the 60 GHz high band for the IEEE 802.11ad standard chipset (chip type such as Qualcomm AR9004TB, Intel Wireless-AC 18265) ). In this way, both the first multi-band transceiver and the second multi-band transceiver can relatively easily switch between the signal in the first frequency band and the signal in the second frequency band.
  • FIG. 3 is a schematic diagram of data transmission by the wireless communication system 200 of the embodiment shown in FIG. 2.
  • the first frequency band first transceiver 212 transmits a request transmission signal of the 2.4 GHz or 5 GHz frequency band to the receiving end 220 through the GHz antenna, so that the request transmission signal can be transmitted to the receiving end 220 in time to speed up the process of networking establishment.
  • the transmitting end 210 before transmitting the RTS frame, should wait for the duration of the sum of T DIFS and T BF respectively to avoid channel congestion and make the communication proceed in an orderly manner.
  • T DIFS is an inter-frame time slot for distributed coordination functions specified in the IEEE 802.11 protocol
  • T BF is an exponential back-off waiting time due to timeout.
  • T RTS is the time required to transmit an RTS frame.
  • T PROP is the time it takes for a frame to propagate through the medium.
  • the GHz transceiver of the receiving end 220 receives the request to transmit signal through the GHz antenna. As shown in FIG. 3, after receiving the RTS frame, the receiving end 220 needs T PROC time to process the request sending signal to determine whether it is the receiving object specified by the transmitting end 210.
  • the second controller 221 controls the second multi-band transceiver to be switched from the GHz transceiver to the THz transceiver when the receiving end 220 determines the receiving target specified by the transmitting end 210, and the switching time is T SWITCH .
  • the TTS frame of the millimeter wave or terahertz band is directionally transmitted from the THz transceiver to the transmitting end 210 through the THz antenna.
  • the time that the TTS frame propagates in the medium is T TTS . In this way, the TTS frame can be transmitted to the transmitting end 210 at a high speed, and the networking time between the transmitting end 210 and the receiving end 220 is shortened.
  • the second controller 221 is further configured to: when the second multi-band transceiver receives the data signal, control the second multi-band transceiver to send the acknowledgment signal (ACK frame) in the second frequency band to the transmitting end 210. ).
  • the first controller 211 is further configured to: after the first multi-band transceiver receives the acknowledgment signal, control the first multi-band transceiver to continue transmitting the data signal in the second frequency band to the receiving end 220.
  • the first controller 211 of the transmitting end 210 starts processing the TTS frame, and the processing time For T PROC .
  • the transmitting end 210 starts beamforming, aligning the THz antenna array of the first multi-band transceiver with the direction in which the TTS frame arrives.
  • the transmitting end 210 starts preparing data to be transmitted.
  • T DATA is the time it takes for data to travel in the channel.
  • the mutual interference between the signals is very weak, which ensures that the receiving end 220 will receive a higher signal to noise ratio data signal. If the receiving end 220 successfully receives the data signal.
  • the second controller 221 of the receiving terminal 220 processes the data signal for a processing time of T PROC . Then, the receiving end 220 will reply the ACK frame of the millimeter wave or terahertz band to the transmitting end 210 through the second band second transceiver 223.
  • the time required for ACK frame transmission is T ACK .
  • the first controller 211 After the first multi-band transceiver receives the acknowledgment signal, the first controller 211 still processes the ACK frame with the time of T PROC , and then controls the first multi-band transceiver to continue to send the millimeter wave or too to the receiving end 220. Data signal in the Hertz band. In this way, it is ensured that the data between the transmitting end 210 and the receiving end 220 is stably transmitted.
  • the first controller 211 is further configured to: when the first multi-band transceiver does not receive the response signal from the receiving end within a preset time after sending the request sending signal, control the first multi-band transceiver to resend. Request to send a signal.
  • the transmitting end when the transmitting end sends an RTS frame but does not receive the TTS frame from the receiving end, the communication occurs timeout. There are two possible reasons for the timeout. The first reason is because the receiver is not idle at this time and cannot receive data. In this case, the transmitting end resends the request transmission signal in the first frequency band after waiting for the exponential backoff waiting time. That is, in this embodiment, the preset time is an exponential backoff waiting time T BF , and T BF can be calculated according to the following formula:
  • T BF [ ⁇ (2 CW -1)] ⁇ (1)
  • ⁇ is a random number between 0 and 1
  • CW is the length of the backoff window.
  • CW is defined as the smallest between the current number of retransmissions and the defined maximum, ie:
  • RT i is currently the ith retransmission
  • RT max is the predefined maximum value
  • 10 is taken by default.
  • ⁇ is the time gap defined in IEEE802.11.
  • FIG. 4 is a schematic diagram of inconsistency between a GHz channel and a THz channel in the case of a wireless communication system timeout. Another possible reason for the above timeout situation is that the receiving end successfully receives the RTS frame from the transmitting end 410 and confirms the main direction, but the TTS frame cannot be successfully sent to the transmitting end 410 due to the inconsistency between the GHz channel and the THz channel. . As shown in FIG.
  • the RTS frame (GHz channel) of the 2.4 GHz or 5 GHz band can bypass the obstacle 430 by diffraction, and the receiving end will select the RTS frame to receive the strongest direction to transmit the TTS frame in the main direction, and the millimeter wave or too
  • the TTS frame (THz channel) of the Hertz band is blocked by the obstacle 430.
  • the transmitting end 410 does not receive the TTS frame from the receiving end after sending the RTS frame, so a timeout occurs and waits for the exponential backoff waiting time. After the exponential backoff waiting time TBF , the transmitting end 410 retransmits the RTS frame.
  • the receiving end After the TTS frame is sent in the main direction, the data signal cannot be received, but the same RTS frame from the same transmitting end 410 is received. Therefore, the receiver will also time out. In this case, the receiving end selects the direction of the next strong RTS frame as the new primary direction and transmits the corresponding TTS frame. In this way, the receiving end can identify the channel condition between the transmitting end 410 and the receiving end in time, and if the channel cannot transmit data, communicate with other transmitting ends 410 in time to improve communication efficiency.
  • FIG. 5 is a schematic flow chart of a wireless communication method of the first embodiment. It should be noted that the wireless communication method in the present embodiment can be applied to the wireless communication system of any of the above embodiments to achieve efficient wireless communication.
  • the wireless communication method includes:
  • step S110 the transmitting end sends a request sending signal to the receiving end.
  • the request transmission signal is transmitted through the electromagnetic wave of the first frequency band.
  • the signal transmission loss in the first frequency band is small, and the transmission range is wide, so that the request transmission signal arrives at the receiving end in time.
  • Step S130 the transmitting end receives the response signal from the receiving end.
  • the response signal is transmitted through the electromagnetic wave of the second frequency band.
  • the receiving end receives the response signal indicating that the connection between the transmitting end and the receiving end is successfully established, and communication can be performed between each other.
  • the transmitting end may not receive the response signal. In this case, the connection between the transmitting end and the receiving end is not established, and the transmitting end and the receiving end may not communicate.
  • step S150 the transmitting end and the receiving end perform data transmission.
  • the data transmission is performed by electromagnetic waves of the second frequency band.
  • the frequency of the electromagnetic wave in the second frequency band is higher than the frequency of the electromagnetic wave in the first frequency band.
  • the transmitting end sends the data signal in the second frequency band to the receiving end.
  • the signals in the second frequency band have a higher transmission rate to efficiently perform data transmission.
  • the frequency of the electromagnetic wave in the second frequency band is higher than the frequency of the electromagnetic wave in the first frequency band.
  • the request sending signal sent by the transmitting end to the receiving end in the first frequency band can be transmitted to the receiving end in time to attempt to establish a network connection with the receiving end in time. Then, after receiving the response signal at the transmitting end, the network between the transmitting end and the receiving end is successfully established.
  • the transmitting end transmitting the data signal in the second frequency band to the receiving end can be quickly transmitted to the receiving end. Therefore, in the above wireless communication process, the transmitting end can efficiently transmit data to the receiving end.
  • the signal in the first frequency band is a signal in the 2.4 GHz or 5 GHz frequency band
  • the signal in the second frequency band is a signal in the millimeter wave or terahertz frequency band.
  • the transmitting end sends a request to send signal to the receiving end through all the communication nodes in the receiving range.
  • the frequency of the request transmission signal is in the first frequency band, the transmission loss of the request transmission signal is small, and the transmission range is wide. In this way, all the communication nodes in the transmission range of the transmitting end can receive the request sending signal without excessive energy overhead; the antenna of the receiving end is prevented from being far away from the transmitting end and cannot successfully reach the receiving end. (deafness problem); ensuring that the request sending signal is transmitted to the receiving end by a plurality of communication nodes, so that the request sending signal can be transmitted to the receiving end in time, so that the transmitting end can successfully establish a connection with the receiving end and transmit data.
  • the wireless communication method further comprises: when the transmitting end does not receive the response signal from the receiving end within a preset time after transmitting the request transmitting signal, retransmitting the request sending signal.
  • the transmitting end when the transmitting end sends an RTS frame but does not receive the TTS frame from the receiving end, the communication occurs timeout. There are two possible reasons for the timeout. The first reason is because the receiver is not idle at this time and cannot receive data. In this case, the transmitting end resends the request transmission signal in the first frequency band after waiting for the exponential backoff waiting time. That is, in this embodiment, the preset time is an exponential backoff waiting time T BF , and T BF can be calculated according to the following formula:
  • T BF [ ⁇ (2 CW -1)] ⁇ (3)
  • ⁇ is a random number between 0 and 1
  • CW is the length of the backoff window. CW is defined as the smallest between the current number of retransmissions and the defined maximum, ie:
  • RT i is currently the ith retransmission
  • RT max is the predefined maximum value
  • 10 is taken by default
  • ⁇ is the time gap defined in IEEE802.11.
  • Another possible timeout reason is that the receiving end successfully received the RTS frame from the transmitting end and confirmed the main direction, but the TTS frame cannot be successfully delivered to the transmitting end due to the inconsistency between the channel of the RTS frame and the channel of the TTS frame.
  • the inconsistency between the GHz channel and the THz channel causes the TTS frame to be unable to be successfully delivered to the transmitting end.
  • the RTS frame (GHz channel) in the 2.4 GHz or 5 GHz band can bypass the obstacle by diffraction, and the receiving end will select the TTS frame in which the strongest direction of the received RTS frame is transmitted in the main direction, and the TTS frame in the millimeter wave or terahertz band (THz).
  • the channel will be blocked by obstacles.
  • the transmitting end after the RTS frame is sent by the transmitting end, the TTS frame from the receiving end is not received, so a timeout occurs and waits for the exponential backoff waiting time. After the exponential backoff waiting time, the transmitting end retransmits the RTS frame.
  • the receiving end After the TTS frame is sent in the main direction, the data signal cannot be received, but the same RTS frame from the same transmitting end is received. Therefore, the receiver will also time out. In this case, the receiving end selects the direction of the next strong RTS frame as the new primary direction and transmits the corresponding TTS frame. In this way, the receiving end can identify the channel condition between the transmitting end and the receiving end in time, and if the channel cannot transmit data, communicate with other transmitting ends in time to improve communication efficiency.
  • the step of transmitting data by the transmitting end and the receiving end includes: the transmitting end sends a data signal to the receiving end; after receiving the acknowledgment signal from the receiving end, continuing to send the next data signal to the receiving end.
  • the acknowledgment signal is transmitted through the electromagnetic wave of the second frequency band.
  • the transmitting end After the transmitting end sends a data signal to the receiving end, the operation does not end, but the data signal is continuously transmitted to the receiving end. Therefore, the sender also waits for an acknowledgment signal sent back by the receiver, that is, an ACK frame.
  • the transmitting end After receiving the ACK frame, the transmitting end means that the receiving end can continue to accept the data signal of the transmitting end, that is, the network connection between the transmitting end and the receiving end is valid. The transmitting end continues to send the next data signal to the receiving end.
  • FIG. 6 is a schematic flow chart of a wireless communication method according to a second embodiment.
  • the wireless communication method includes:
  • Step S210 the receiving end receives the request sending signal from the transmitting end.
  • the request transmission signal is transmitted through electromagnetic waves of the first frequency band.
  • the signal transmission loss in the first frequency band is small and the transmission range is wide. Therefore, the request to send a signal can arrive at the receiving end in time.
  • Step S230 the receiving end sends a response signal to the transmitting end.
  • the response signal is transmitted through the electromagnetic wave of the second frequency band.
  • the signal in the second frequency band has a higher transmission rate.
  • the response signal can reach the transmitting end quickly.
  • the receiving end returns a response signal to the transmitting end to indicate that the network connection is successfully established between the receiving end and the transmitting end.
  • Step S250 receiving a data signal sent by the transmitting end and transmitting data by the transmitting end.
  • the data signal is transmitted through the electromagnetic wave of the second frequency band.
  • the frequency of the second frequency band is higher than the frequency of the first frequency band.
  • the frequency of the electromagnetic wave in the second frequency band is higher than the frequency of the electromagnetic wave in the first frequency band.
  • the request sending signal in the first frequency band can be transmitted to the receiving end in time, so that the receiving end establishes a network connection with the transmitting end in time.
  • the wireless communication device After receiving the request to send signal, the wireless communication device sends a response signal of the second frequency band to indicate that a network connection can be established with the transmitting end.
  • the response signal in the second frequency band can be quickly transmitted to the transmitting end. This will shorten the time it takes to set up the network.
  • the data signal in the second frequency band can be quickly transmitted to the receiving end. Thereby facilitating efficient transmission of data between the wireless communication device and the transmitting end.
  • the receiving end receives the data signal sent by the transmitting end and the transmitting end performs data transmission, that is, after step S250, the receiving end receives the data signal from the transmitting end, and sends an acknowledgement signal to the transmitting end; Two-band electromagnetic wave transmission; continue to receive the next data signal from the transmitting end.
  • the signal of the first frequency band is a signal of a frequency band of 2.4 GHz or 5 GHz
  • the signal of the second frequency band is a signal of a millimeter wave or a terahertz band. If the receiving end successfully receives the data signal of the millimeter wave or terahertz band. The receiving end will reply the ACK frame of the millimeter wave or terahertz band to the transmitting end, and the receiving end continues to wait for receiving the data signal in the second frequency band. In this way, it is ensured that the data between the transmitting end and the receiving end is stably transmitted.
  • Fig. 7 is a schematic diagram of a wireless communication method of the third embodiment. The method includes the following steps:
  • Step S210 receiving a request transmission signal from a plurality of transmitting ends.
  • step S231 the receiving end compares the strengths of all the requested transmission signals, and takes the direction of the transmitting end corresponding to the strongest request transmission signal as the main direction.
  • Step S233 the receiving end sends a response signal to the transmitting end corresponding to the main direction.
  • Step S250 receiving a data signal sent by the transmitting end and transmitting data by the transmitting end.
  • the receiving end receives multiple request sending signals simultaneously. After receiving the request sending signal, the receiving end determines whether the request sending signal is the strongest request sending signal, and determines that it is the receiving end of the transmitting end if the request sending signal is the strongest request sending signal received by the receiving end. The receiving end sends a response signal in the second frequency band to the transmitting end.
  • the receiving end receives multiple request transmission signals, the strength of the plurality of RTS frames is analyzed, and the signal direction of the strongest RTS frame is selected as the main direction. That is to say, if the signal strength of the RTS frame sent by the transmitting end is the strongest signal, the receiving end will send a TTS frame, which means that the transmitting end can establish a connection with the receiving end. In this way, the TTS frame is sent according to the signal of the strongest RTS frame, so that the networking between the sender and the receiver can be performed in an orderly manner to avoid confusion.
  • Fig. 8 is a schematic diagram of a wireless communication method of the fourth embodiment.
  • the wireless communication method in this embodiment is applied to the wireless communication system of any of the above embodiments, and the wireless communication method embodies interactive communication between the transmitting end and the receiving end.
  • the wireless communication method includes:
  • Step S510 the transmitting end sends a request sending signal to the receiving end; the request sending signal is transmitted through the electromagnetic wave of the first frequency band.
  • Step S530 the receiving end receives the request sending signal, and the receiving end sends a response signal to the transmitting end when determining that it is the receiving object specified by the transmitting end; the response signal is transmitted through the electromagnetic wave of the second frequency band.
  • Step S550 the transmitting end performs data transmission with the receiving end when receiving the response signal; the data transmission is performed by electromagnetic waves of the second frequency band.
  • the frequency of the request transmission signal sent by the transmitting end to the receiving end is in the first frequency band, so that the request sending signal can be transmitted to the receiving end in time.
  • the receiving end sends a response signal of the second frequency band to indicate that a network connection can be established between the transmitting end and the receiving end.
  • the response signal in the second frequency band can be quickly transmitted to the transmitting end. This will shorten the time it takes to set up the network.
  • the transmitting end sends a data signal to the receiving end, and the data signal in the second frequency band can be quickly transmitted to the receiving end. Therefore, the transmitting end of the above wireless communication system can efficiently transmit data to the receiving end.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明涉及一种无线通信方法。无线通信方法包括：向接收端发送请求发送信号；请求发送信号通过第一频段的电磁波传输；接收来自接收端的应答信号；以及与接收端进行数据传输；应答信号和数据传输通过第二频段的电磁波进行；第二频段的电磁波的频率高于第一频段的电磁波的频率。本发明涉及另一种无线通信方法，包括：接收来自发送端的请求发送信号；请求发送信号通过第一频段的电磁波进行传输；向发送端发送应答信号；应答信号和数据信号通过第二频段的电磁波传输；其中，第二频段的频率高于第一频段的频率。本发明还涉及无线通信设备。上述无线通信方法及设备，发送端可以高效地向接收端传输数据。

Description

无线通信方法及设备 技术领域
本发明涉及通信技术领域，特别涉及一种无线通信方法及设备。
背景技术
近年来，人们的工作和生活中有大量的数据需要进行交换和传输。随着科技的发展，这些数据的传输越来越依赖于无线通信技术，例如，用移动终端(比如手机)进行通信已经成为人们日常生活和工作中的一部分。可以说无线通信技术从作为有线通信的一种补充已经演变成了通信技术的主流。
目前广泛应用的无线通信技术使用2.4GHz至5GHz载波频谱来实现速度较快的无线传输。但是，面对不断增加的通信需求，目前的通信技术的通信效率较低，已经无法满足人们日益增长的通信需求。
发明内容
基于此，有必要针对传统的基于目前的通信技术的通信效率较低，已经无法满足人们日益增长的通信需求的问题，提供一种无线通信方法及系统。
一种无线通信方法，包括：
向接收端发送请求发送信号；所述请求发送信号通过第一频段的电磁波传输；
接收来自接收端的应答信号；所述应答信号通过所述第二频段的电磁波传输；以及
与所述接收端进行数据传输；所述数据传输通过所述第二频段的电磁波进行；其中，所述第二频段的电磁波的频率高于所述第一频段的电磁波的频率。
上述无线通信方法，第二频段的电磁波的频率高于第一频段的电磁波的频率。发送端向接收端发送的在第一频段内的请求发送信号可以及时地传输至接收端，以试图与接收端及时地建立网络连接。然后，在发送端接收到应答信号 后，发送端与接收端之间的网络建立成功。发送端向接收端发送第二频段内的数据信号可以快速地传输至接收端。因此，上述无线通信过程中发送端可以高效地向接收端传输数据。
在其中一个实施例中，所述向接收端发送请求发送信号的步骤为：通过接收范围内的所有通信节点向接收端发送请求发送信号。
在其中一个实施例中，所述方法还包括：在发送请求发送信号后的预设时间内未接收到来自接收端的应答信号时，重新发送所述请求发送信号。
在其中一个实施例中，所述与所述接收端进行数据传输的步骤中包括：
向所述接收端发送数据信号；
在接收到来自所述接收端的确认信号后，继续向所述接收端发送下一数据信号；所述确认信号通过所述第二频段的电磁波传输。
在其中一个实施例中，所述第一频段的电磁波的频率为2.4GHz或5GHz，所述第二频段的电磁波是毫米波频段或太赫兹频段的电磁波。
一种无线通信方法，包括：
接收来自发送端的请求发送信号；所述请求发送信号通过第一频段的电磁波进行传输；
向所述发送端发送应答信号；所述应答信号通过第二频段的电磁波传输；以及
接收所述发送端发送来的数据信号与所述发送端进行数据传输；所述数据信号通过所述第二频段的电磁波传输；其中，所述第二频段的频率高于所述第一频段的频率。
在其中一个实施例中，所述接收来自发送端的请求发送信号的步骤为：接收来自多个发送端的请求发送信号；
所述向所述发送端发送应答信号的步骤还包括：
比较所有请求发送信号的强度，并将最强的请求发送信号对应的发送端的方向作为主方向；
向所述主方向对应的发送端发送应答信号。
在其中一个实施例中，所述接收所述发送端发送来的数据信号与所述发送 端进行数据传输的步骤包括：
接收来自所述发送端的数据信号；
向所述发送端发送确认信号；所述确认信号通过第二频段的电磁波传输；
继续接收来自所述发送端的下一数据信号。
在其中一个实施例中，所述第一频段的电磁波的频率为2.4GHz或5GHz，所述第二频段的电磁波是毫米波频段或太赫兹频段的电磁波。
上述无线通信方法，第二频段的电磁波的频率高于第一频段的电磁波的频率。第一频段内的请求发送信号可以及时地传输至无线通信设备，以及时与发送端建立网络连接。无线通信设备接收到请求发送信号后，发出第二频段的应答信号表示与发送端之间可以建立网络连接。在第二频段内的应答信号可以快速地传输至发送端。这样可以缩短建立网络的时间。并且，第二频段内的数据信号可以快速地传输至接收端。从而有助于无线通信设备与发送端之间高效地传输数据。
一种无线通信设备，包括：
第一多频段收发器，用于发送第一频段的电磁波，还用于接收和/或发送第二频段的电磁波；
第一控制器，用于控制所述第一多频段收发器向接收端发送请求发送信号，控制所述第一多频段收发器接收来自接收端的应答信号及控制所述第一多频段收发器与所述接收端进行数据传输；其中，所述请求发送信号通过第一频段的电磁波传输；所述应答信号通过所述第二频段的电磁波传输；所述数据传输通过所述第二频段的电磁波进行；所述第二频段的电磁波的频率高于所述第一频段的电磁波的频率。
一种无线通信设备，包括：
第二多频段收发器，用于接收第一频段的电磁波，还用于发送第二频段的电磁波；
第二控制器，用于控制所述第二多频段收发器接收来自发送端的请求发送信号，控制所述第二多频段收发器向所述发送端发送应答信号，及接收所述发送端发送来的数据信号与所述发送端进行数据传输；其中，所述请求发送信号 通过第一频段的电磁波进行传输；所述应答信号通过第二频段的电磁波传输；所述数据信号通过所述第二频段的电磁波传输；所述第二频段的频率高于所述第一频段的频率。
附图说明
图1为一实施例的无线通信系统的示意图；
图2为另一实施例的无线通信系统的示意图；
图3为图2所示的实施例的无线通信系统传输数据的示意图；
图4为无线通信系统超时情况下GHz信道和THz信道的不一致的示意图；
图5为第一实施例的无线通信方法的示意图；
图6为第二实施例的无线通信方法的流程示意图；
图7为第三实施例的无线通信方法的流程示意图；
图8为第四实施例的无线通信方法的流程示意图。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。
通常状况下，设备之间实现通信需要具备发送端和接收端。在通信的某一时刻，发送端发送数据，接收端接收发送端发送的数据，这样，完成这一时刻的通信。需要说明的是，发送端不局限于发送数据，也可以接收数据。同理，接收端不局限于接收数据，也可以发送数据。即在发送端与接收端通信的整个过程中，发送端与接收端之间是一个交互的通信过程。
图1为一实施例的无线通信系统100的示意图。一种无线通信系统100，包括两个无线通信设备。一个无线通信设备可以作为发送端110。另一个无线通信设备可以作为接收端120。发送端110包括第一控制器111和第一多频段收发器112。接收端120包括第二控制器121和第二多频段收发器122。
第一多频段收发器112用于发送第一频段的电磁波，还用于接收和/或发送第二频段的电磁波。
第一控制器111用于控制第一多频段收发器112向接收端发送请求发送信号。第一控制器111控制第一多频段收发器112接收来自接收端的应答信号及控制第一多频段收发器112与接收端进行数据传输。其中，请求发送信号通过第一频段的电磁波传输。应答信号通过第二频段的电磁波传输。数据传输通过第二频段的电磁波进行。第二频段的电磁波的频率高于第一频段的电磁波的频率。
第二多频段收发器122用于接收第一频段的电磁波，还用于发送第二频段的电磁波。
第二控制器121用于控制第二多频段收发器122接收来自发送端的请求发送信号，控制第二多频段收发器122向发送端发送应答信号，及接收发送端发送来的数据信号与发送端进行数据传输。其中，请求发送信号通过第一频段的电磁波进行传输。应答信号通过第二频段的电磁波传输；数据信号通过第二频段的电磁波传输。第二频段的频率高于第一频段的频率。
以下就发送端110与接收端120之间的交互通信说明本实施例的通信过程。
本实施例中，发送端110期望向接收端120发送数据时，首先由第一控制器111控制第一多频段收发器112向接收端120发送一个请求发送信号。具体地，发送端110通过接收范围内的所有通信节点向接收端120发送请求发送信号。由于请求发送信号的频率在第一频段内，请求发送信号的传输损失较小，传输范围较广。这样可以使在发送端110的传输范围内的所有通信节点都收到该请求发送信号，确保请求发送信号由多个通信节点传输至接收端120，这样，请求发送信号可以及时地传输至接收端120。即发送端110通过第一频段的请求发送信号可以高效地找到接收端120。本实施例中，请求发送信号可以以请求发送帧(Request-To-Send，简写为RTS)进行传输。
第二多频段收发器122用于接收请求发送信号。第二控制器121在确定接收请求发送信号对应的数据信号的情况下，即在确定接收端120是发送端110所指定的接收对象的情况下，控制第二多频段收发器122向发送端110发送应答信号，第二频段内的信号具有较高的传输速率，这样应答信号可以快速传输至发送端110。
本实施例中，当接收端120处于空闲状态时，接收端120通过第二多频段 收发器122等待可能的RTS帧。第二多频段收发器122在同一时刻可能接收到多个发送端的RTS帧。当收到RTS帧后，第二控制器121处理接收到的RTS帧，确定自身是否为上述发送端110所指定的接受对象，即确定上述发送端110发送数据的方向是否为接收端120接收数据的主方向。第二控制器121在确定接收端120是发送端110所指定的接收对象的情况下，控制第二多频段收发器122向发送端110发送应答信号，以通知发送端110，接收端120已经做好准备接受数据。第二频段内的应答信号具有较高的传输速率，可以快速地传输至发送端110。本实施例中，应答信号以应答帧(Test-To-Send，简写为TTS)进行传输。
本实施例中，第二控制器121还用于比较所有RTS帧的强度，并将最强的请求发送信号对应的发送端的方向作为主方向。第二控制器121控制第二多频段收发器122向发送端110发送第二频段内的应答信号。在第二多频段收发器122接收到多个请求发送信号的情况下，第二控制器121对多个RTS帧的强度进行分析，选取最强的RTS帧的信号方向作为主方向。也就是说，发送端110发送的RTS帧的信号强度是最强的信号的情况下，第二多频段收发器122才会发出TTS帧，这样才意味着发送端110能够与接收端120建立连接。这样，根据最强的RTS帧的信号发送TTS帧，可以使得发送端110与接收端120之间的组网有序进行，避免混乱。
第一控制器111在第一多频段收发器112接收到应答信号的情况下，控制第一多频段收发器112向接收端120发送数据信号，第二频段内的信号具有较高的传输速率，第二频段内的数据信号可以高效地传输至接收端120。本实施例中，第一多频段收发器112接收到TTS帧，说明接收端120可以接收数据。第一控制器111控制第一多频段收发器112向接收端120发送第二频段内的数据信号，以使数据信号高效地传输至接收端120。
上述无线通信系统100中，首先，发送端110的第一多频段收发器112向接收端120发送的请求发送信号的频率在第一频段内，可以使得请求发送信号及时地传输至接收端120。其次，接收端120的第一多频段收发器112接收到请求发送信号后，发出第二频段的应答信号表示发送端110与接收端120之间可 以建立网络连接。在第二频段内的应答信号可以快速地传输至发送端110。这样可以缩短建立网络的时间。然后，在发送端110接收到应答信号后，发送端110与接收端120之间的网络建立成功，发送端110的第一多频段收发器112向接收端120发送数据信号，且在第二频段内的数据信号可以快速地传输至接收端120。因此，上述无线通信系统100的发送端110可以高效地向接收端120传输数据。
本实施例中，第一频段的信号为2.4GHz或5GHz频段的信号，第二频段的信号为毫米波频段或太赫兹频段的信号。这样，第一多频段收发器112发送的第一频段的请求发送信号用来高效建立网络。第二多频段收发器122通过发送第二频段的应答信号及第一多频段收发器112发送的第二多频段的数据信号，可以提高信号传输速率，使得无线通信系统100高效地传输数据。
图2为一实施例的无线通信系统200的示意图。如图2所示，第一多频段收发器包括第一频段第一收发器212和第二频段第一收发器213。第二多频段收发器包括第一频段第二收发器222和第二频段第二收发器223。
第一频段第一收发器212可以收发第一频段的电磁波。第一频段第一收发器212用于发送请求发送信号。第二频段第一收发器213可以收发第二频段的电磁波。第二频段第一收发器212用于接收第二频段的应答信号并发送第二频段的数据信号。第一频段第二收发器222可以收发第一频段的电磁波。第一频段第二收发器222用于接收第一频段的请求发送信号。第二频段第二收发器223可以收发第二频段的电磁波。第二频段第二收发器223用于发送第二频段的应答信号，并接收第二频段的数据信号。
在一实施例中，第一频段第一收发器212和第一频段第二收发器222可以为多向2.4GHz或5GHz收发器(简称GHz收发器)，其产生的第一频段的信号为2.4GHz或5GHz频段的低频段信号。GHz收发器控制多向的2.4GHz或5GHz天线，即GHz收发器控制多向的GHz天线，GHz收发器通过GHz天线发送或接收相应的低频段信号。2.4GHz或5GHz频段的低频段信号的传输损失较小，传输范围大，请求发送信号可以及时传输至接收端220。第二频段第一收发器213和第二频段第二收发器223均以毫米波及太赫兹天线(THz收发器)为例。 THz收发器控制一个太赫兹天线阵列(THz天线阵列)，THz收发器通过THz天线阵列发送或接收毫米波或太赫兹频段的信号。毫米波或太赫兹频段具有更宽的可用信道，可以高速地传输数据，理论速率可达100Gpbs甚至1Tpbs。并且THz天线阵列采用波束赋形技术形成很窄的发射信号，可以提高信号的增益。THz收发器可以实现应答信号及数据信号的高效传输。例如，第一多频段收发器或第二多频段收发器可以采用在2.4/5GHz频段及60GHz高频段无缝切换的适用于IEEE802.11ad标准芯片组(芯片型号比如高通AR9004TB，英特尔Wireless-AC 18265)。这样，第一多频段收发器和第二多频段收发器都能够比较容易地实现在第一频段的信号和第二频段的信号之间的切换。
图3为图2所示的实施例的无线通信系统200传输数据的示意图。第一频段第一收发器212通过GHz天线向接收端220发送2.4GHz或5GHz频段的请求发送信号，这样请求发送信号可以及时地传输至接收端220，以加快组网建立的进程。如图3所示，在传输RTS帧之前，发送端210应先分别等待T DIFS与T BF之和的时长，以避免信道拥堵，使通信有序进行。T DIFS是IEEE802.11协议中规定的对于分布式协调功能下的帧间时隙，T BF是由于超时产生的指数退避等待时间。图3中，T RTS是发送RTS帧所需要的时间。T PROP是帧在介质中传播所需要的时间。第一控制器211在第一频段第一收发器212发送2.4GHz或5GHz频段的请求发送信号后，控制第一多频段收发器由GHz收发器切换至THz收发器，以侦听信道，准备接收第二多频段收发器发送的毫米波或太赫兹频段的TTS帧。
接收端220的GHz收发器通过GHz天线接收请求发送信号。如图3所示，当收到RTS帧后，接收端220需要T PROC的时间去处理请求发送信号，确定自身是否为发送端210所指定的接收对象。第二控制器221在确定接收端220为发送端210指定的接收对象时，控制第二多频段收发器由GHz收发器切换至THz收发器，切换用时为T SWITCH。由THz收发器通过THz天线向发送端210定向发送毫米波或太赫兹频段的TTS帧。TTS帧在介质中传播的时间为T TTS。这样，TTS帧可以高速地传输至发送端210，缩短发送端210与接收端220之间的组网时间。
一实施例中，第二控制器221还用于在第二多频段收发器接收到数据信号 的情况下，控制第二多频段收发器向发送端210发送第二频段内的确认信号(ACK帧)。第一控制器211还用于在第一多频段收发器在接收到确认信号后，控制第一多频段收发器继续向接收端220发送第二频段内的数据信号。
具体地，第一多频段收发器的THz收发器一旦收到来自于第二多频段收发器的2.4GHz或5GHz频段的TTS帧，发送端210的第一控制器211开始处理TTS帧，处理时间为T PROC。发送端210开始波束赋形，将第一多频段收发器的THz天线阵列对准TTS帧到来的方向。发送端210开始准备将要进行传输的数据。T DATA是数据在信道中传输所需的时间。得益于毫米波或太赫兹频段高度定向传输的优点，信号间互相干扰很微弱，保障了接收端220将收到一个较高的信噪比的数据信号。如果接收端220成功收到数据信号。接收端220的第二控制器221处理数据信号，处理时间为T PROC。然后，接收端220会通过第二频段第二收发器223回复毫米波或太赫兹频段的ACK帧给发送端210。ACK帧传输所需时间为T ACK。第一控制器211在第一多频段收发器在接收到确认信号后，发送端210依然用T PROC的时间处理ACK帧，随后控制第一多频段收发器继续向接收端220发送毫米波或太赫兹频段的数据信号。这样，可以确保发送端210与接收端220之间的数据稳定地传输。
一实施例中，第一控制器211还用于在第一多频段收发器在发送请求发送信号后的预设时间内未接收到来自接收端的应答信号时，控制第一多频段收发器重新发送请求发送信号。
具体地，在当发送端发出RTS帧却没有收到来自接收端的TTS帧时，即为通信发生超时。超时有两个可能的原因，第一个原因是因为此时的接收端并不空闲无法接收数据。这种情况下，发送端等待指数退避等待时间后重新发送第一频段内的请求发送信号。即本实施例中，预设时间为指数退避等待时间T BF，T BF可根据如下公式计算：
T BF＝[Γ×(2 CW-1)]×τ      (1)
式(1)中，Γ是一个取值为0至1之间的随机数，CW是退避窗口的长度。CW定义为在当前重传次数和定义最大值之间取最小者，即：
CW＝min{RT i，RT max}        (2)
式(2)中，RT i为当前是第i次重传，RT max为预定义最大值，默认条件下取10。τ为IEEE802.11中定义的时间间隙。当RTS帧由于接收端繁忙而发生超时，发送端需要在等待T BF时间后才可尝试下一次发送RTS帧，以尽可能地实现发送端与接收端之间的数据通信。
图4为无线通信系统超时情况下GHz信道和THz信道的不一致的示意图。上述超时情况的另一种可能的原因则是接收端成功收到了来自发送端410的RTS帧并确认了主方向，但由于GHz信道和THz信道的不一致造成了TTS帧无法顺利送达发送端410。如图4所示，2.4GHz或5GHz频段的RTS帧(GHz信道)可以通过衍射绕开障碍物430，接收端将选取收到RTS帧最强方向为主方向发送TTS帧，而毫米波或太赫兹频段的TTS帧(THz信道)则会被障碍物430所阻拦。这种情况下，发送端410发出RTS帧后收不到来自接收端的TTS帧，因此会发生超时并等待指数退避等待时间，在指数退避等待时间T BF后，发送端410会重发RTS帧。而对于接收端，在按照主方向发出TTS帧以后并不能收到数据信号，却会收到来自同一个发送端410的同样RTS帧。因此接收端也会发生超时。这种情况下，接收端将选择次强烈的RTS帧的方向为新的主方向并发送相应的TTS帧。这样，接收端可以及时识别发送端410与接收端之间的信道状况，如果信道不能传输数据，则及时与其它的发送端410进行通信，提高通信效率。
图5为第一实施例的无线通信方法的流程示意图。需要说明的是，本实施方式中的无线通信方法可以应用于上述任一实施例的无线通信系统中，以实现高效地无线通信。
该无线通信方法包括：
步骤S110，发送端向接收端发送请求发送信号。
具体地，请求发送信号通过第一频段的电磁波传输。第一频段内的信号传输损失较小，传输范围较广，以使得请求发送信号及时到达接收端。
步骤S130，发送端接收来自接收端的应答信号。
具体地，应答信号通过第二频段的电磁波传输。发送端接收到应答信号表示发送端与接收端之间成功建立连接，相互之间可以通信。相反，发送端也可能接收不到应答信号，此时则表示发送端与接收端之间未建立连接，发送端与接收端之间不可以通信。
步骤S150，发送端与接收端进行数据传输。
具体地，数据传输通过第二频段的电磁波进行。第二频段的电磁波的频率高于第一频段的电磁波的频率。如上，发送端接收到应答信号后，意味着发送端与接收端之间可以通信。发送端向接收端发送第二频段内的数据信号。第二频段内的信号具有较高的传输速率，以高效地完成数据传输。
上述无线通信方法，第二频段的电磁波的频率高于第一频段的电磁波的频率。发送端向接收端发送的在第一频段内的请求发送信号可以及时地传输至接收端，以试图与接收端及时地建立网络连接。然后，在发送端接收到应答信号后，发送端与接收端之间的网络建立成功。发送端向接收端发送第二频段内的数据信号可以快速地传输至接收端。因此，上述无线通信过程中发送端可以高效地向接收端传输数据。
需要说明的是，本实施方式中，第一频段的信号为2.4GHz或5GHz频段的信号，第二频段的信号为毫米波或太赫兹频段的信号。这样，第一频段的请求发送信号用来高效建立网络，第二频段的应答信号及数据信号提高信号传输速率，使得无线通信过程中高效地传输数据。
一实施例中，发送端通过接收范围内的所有通信节点向接收端发送请求发送信号。
由于请求发送信号的频率在第一频段内，请求发送信号的传输损失较小，传输范围较广。这样可以使在发送端的传输范围内的所有通信节点都收到该请求发送信号，并且不会带来过大的能量开销；避免了接收端的天线正朝向远离发送端的方向而不能成功到达接收端的情况(deafness problem)；确保请求发送信号由多个通信节点传输至接收端，这样，请求发送信号可以及时地传输至接收端，使得发送端可以成功的和接收端建立连接并传输数据。
一实施例中，该无线通信方法还包括：发送端在发送请求发送信号后的预 设时间内未接收到来自接收端的应答信号时，重新发送请求发送信号。
具体地，在当发送端发出RTS帧却没有收到来自接收端的TTS帧时，即为通信发生超时。超时有两个可能的原因，第一个原因是因为此时的接收端并不空闲无法接收数据。这种情况下，发送端等待指数退避等待时间后重新发送第一频段内的请求发送信号。即本实施例中，预设时间为指数退避等待时间T BF，T BF可根据如下公式计算：
T BF＝[Γ×(2 CW-1)]×τ       (3)
式(3)中，Γ是一个取值为0至1之间的随机数，CW是退避窗口的长度。CW定义为在当前重传次数和定义最大值之间取最小者，即：
CW＝min{RT i，RT max}         (4)
式(4)中，RT i为当前是第i次重传，RT max为预定义最大值，默认条件下取10。τ为IEEE802.11中定义的时间间隙。当RTS帧由于接收端繁忙而发生超时，发送端需要在等待T BF时间后才可尝试下一次发送RTS帧，以尽可能地实现发送端与接收端之间的数据通信。
另一种可能的超时原因则是接收端成功收到了来自发送端的RTS帧并确认了主方向，但由于RTS帧的信道和TTS帧的信道的不一致造成了TTS帧无法顺利送达发送端。具体可参考图4中的信道情况，即GHz信道和THz信道的不一致造成了TTS帧无法顺利送达发送端。2.4GHz或5GHz频段的RTS帧(GHz信道)可以通过衍射绕开障碍物，接收端将选取收到RTS帧最强方向为主方向发送TTS帧，而毫米波或太赫兹频段的TTS帧(THz信道)则会被障碍物所阻拦。这种情况下，发送端发出RTS帧后收不到来自接收端的TTS帧，因此会发生超时并等待指数退避等待时间，在指数退避等待时间后，发送端会重发RTS帧。而对于接收端，在按照主方向发出TTS帧以后并不能收到数据信号，却会收到来自同一个发送端的同样RTS帧。因此接收端也会发生超时。这种情况下，接收端将选择次强烈的RTS帧的方向为新的主方向并发送相应的TTS帧。这样，接收端可以及时识别发送端与接收端之间的信道状况，如果信道不能传输数据，则及时与其它的发送端进行通信，提高通信效率。
一实施例中，发送端与接收端进行数据传输的步骤，即步骤S150包括：发送端向接收端发送数据信号；在接收到来自接收端的确认信号后，继续向接收端发送下一数据信号。
具体地，确认信号通过第二频段的电磁波传输。一般情况下，发送端在向接收端发送数据信号后，工作并没有结束，而是要持续向接收端传送数据信号。因此，发送端还会等待接收端发回的确认信号，即ACK帧。发送端在收到ACK帧后，意味着接收端可以继续接受发送端的数据信号，即发送端与接收端之间的网络连接有效。发送端继续向接收端发送下一数据信号。
图6为第二实施例的无线通信方法的流程示意图。该无线通信方法，包括：
步骤S210，接收端接收来自发送端的请求发送信号。
具体地，请求发送信号通过第一频段的电磁波进行传输。第一频段内的信号传输损失较小，传输范围较广。因此请求发送信号可及时到达接收端。
步骤S230，接收端向发送端发送应答信号。
具体地，应答信号通过第二频段的电磁波传输。第二频段内的信号具有较高的传输速率。这样，应答信号可以快速地到达发送端。同时，接收端向发送端返回应答信号表明接收端与发送端之间成功建立网络连接。
步骤S250，接收发送端发送来的数据信号与发送端进行数据传输。
具体地，数据信号通过第二频段的电磁波传输。第二频段的频率高于第一频段的频率。
上述无线通信方法，第二频段的电磁波的频率高于第一频段的电磁波的频率。第一频段内的请求发送信号可以及时地传输至接收端，以使接收端及时与发送端建立网络连接。无线通信设备接收到请求发送信号后，发出第二频段的应答信号表示与发送端之间可以建立网络连接。在第二频段内的应答信号可以快速地传输至发送端。这样可以缩短建立网络的时间。并且，第二频段内的数据信号可以快速地传输至接收端。从而有助于无线通信设备与发送端之间高效地传输数据。
一实施例中，接收端接收发送端发送来的数据信号与发送端进行数据传输的步骤，即步骤S250之后包括：接收端接收来自发送端的数据信号；向发送端 发送确认信号；确认信号通过第二频段的电磁波传输；继续接收来自发送端的下一数据信号。
如前述，假设第一频段的信号为2.4GHz或5GHz频段的信号，第二频段的信号为毫米波或太赫兹频段的信号。如果接收端成功收到毫米波或太赫兹频段的数据信号。接收端会回复毫米波或太赫兹频段的ACK帧给发送端，同时接收端继续等待接收第二频段内的数据信号。这样，可以确保发送端与接收端之间的数据稳定地传输。
图7为第三实施例的无线通信方法的示意图。该方法包括以下步骤：
步骤S210，接收来自多个发送端的请求发送信号。
步骤S231，接收端比较所有请求发送信号的强度，并将最强的请求发送信号对应的发送端的方向作为主方向。
步骤S233，接收端向主方向对应的发送端发送应答信号。
步骤S250，接收发送端发送来的数据信号与发送端进行数据传输。
具体地，接收端会同时接收多个请求发送信号。接收端收到请求发送信号后，判断请求发送信号是否为最强请求发送信号，并在请求发送信号是接收端接收到的最强请求发送信号的情况下，判定其是发送端的接收对象。接收端向发送端发送第二频段内的应答信号。接收端接收到多个请求发送信号的情况下，对多个RTS帧的强度进行分析，选取最强的RTS帧的信号方向作为主方向。也就是说，发送端发送的RTS帧的信号强度是最强的信号的情况下，接收端才会发出TTS帧，这样才意味着发送端能够与接收端建立连接。这样，根据最强的RTS帧的信号发送TTS帧，可以使得发送端与接收端之间的组网有序进行，避免混乱。
图8为第四实施例的无线通信方法的示意图。本实施例中的无线通信方法应用于上述任一实施例的无线通信系统中，该无线通信方法体现发送端和接收端之间的交互通信。该无线通信方法包括：
步骤S510，发送端向接收端发送请求发送信号；请求发送信号通过第一频段的电磁波传输。
步骤S530，接收端接收请求发送信号，接收端在确定其自身是发送端所指 定的接收对象的情况下，向发送端发送应答信号；应答信号通过第二频段的电磁波传输。
步骤S550，发送端在接收到应答信号的情况下，与接收端进行数据传输；数据传输通过第二频段的电磁波进行。
上述无线通信方法，首先，发送端向接收端发送的请求发送信号的频率在第一频段内，可以使得请求发送信号及时地传输至接收端。其次，接收端接收到请求发送信号后，发出第二频段的应答信号表示发送端与接收端之间可以建立网络连接。在第二频段内的应答信号可以快速地传输至发送端。这样可以缩短建立网络的时间。然后，在发送端接收到应答信号后，发送端与接收端之间的网络建立成功，发送端向接收端发送数据信号，且在第二频段内的数据信号可以快速地传输至接收端。因此，上述无线通信系统的发送端可以高效地向接收端传输数据。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (11)

  1. 一种无线通信方法，包括：
    向接收端发送请求发送信号；所述请求发送信号通过第一频段的电磁波传输；
    接收来自接收端的应答信号；所述应答信号通过所述第二频段的电磁波传输；以及
    与所述接收端进行数据传输；所述数据传输通过所述第二频段的电磁波进行；其中，所述第二频段的电磁波的频率高于所述第一频段的电磁波的频率。
  2. 根据权利要求1所述的方法，其特征在于，所述向接收端发送请求发送信号的步骤为：通过接收范围内的所有通信节点向接收端发送请求发送信号。
  3. 根据权利要求1所述的方法，其特征在于，还包括：在发送请求发送信号后的预设时间内未接收到来自接收端的应答信号时，重新发送所述请求发送信号。
  4. 根据权利要求1所述的方法，其特征在于，所述与所述接收端进行数据传输的步骤中包括：
    向所述接收端发送数据信号；
    在接收到来自所述接收端的确认信号后，继续向所述接收端发送下一数据信号；所述确认信号通过所述第二频段的电磁波传输。
  5. 根据权利要求1所述的方法，其特征在于，所述第一频段的电磁波的频率为2.4GHz或5GHz，所述第二频段的电磁波是毫米波频段或太赫兹频段的电磁波。
  6. 一种无线通信方法，包括：
    接收来自发送端的请求发送信号；所述请求发送信号通过第一频段的电磁波进行传输；
    向所述发送端发送应答信号；所述应答信号通过第二频段的电磁波传输；以及
    接收所述发送端发送来的数据信号与所述发送端进行数据传输；所述数据 信号通过所述第二频段的电磁波传输；其中，所述第二频段的频率高于所述第一频段的频率。
  7. 根据权利要求6所述的方法，其特征在于，所述接收来自发送端的请求发送信号的步骤为：接收来自多个发送端的请求发送信号；
    所述向所述发送端发送应答信号的步骤还包括：
    比较所有请求发送信号的强度，并将最强的请求发送信号对应的发送端的方向作为主方向；
    向所述主方向对应的发送端发送应答信号。
  8. 根据权利要求6所述的方法，其特征在于，所述接收所述发送端发送来的数据信号与所述发送端进行数据传输的步骤包括：
    接收来自所述发送端的数据信号；
    向所述发送端发送确认信号；所述确认信号通过第二频段的电磁波传输；
    继续接收来自所述发送端的下一数据信号。
  9. 根据权利要求6所述的方法，其特征在于，所述第一频段的电磁波的频率为2.4GHz或5GHz，所述第二频段的电磁波是毫米波频段或太赫兹频段的电磁波。
  10. 一种无线通信设备，其特征在于，包括：
    第一多频段收发器，用于发送第一频段的电磁波，还用于接收和/或发送第二频段的电磁波；
    第一控制器，用于控制所述第一多频段收发器向接收端发送请求发送信号，控制所述第一多频段收发器接收来自接收端的应答信号及控制所述第一多频段收发器与所述接收端进行数据传输；其中，所述请求发送信号通过第一频段的电磁波传输；所述应答信号通过所述第二频段的电磁波传输；所述数据传输通过所述第二频段的电磁波进行；所述第二频段的电磁波的频率高于所述第一频段的电磁波的频率。
  11. 一种无线通信设备，其特征在于，包括：
    第二多频段收发器，用于接收第一频段的电磁波，还用于发送第二频段的电磁波；
    第二控制器，用于控制所述第二多频段收发器接收来自发送端的请求发送信号，控制所述第二多频段收发器向所述发送端发送应答信号，及接收所述发送端发送来的数据信号与所述发送端进行数据传输；其中，所述请求发送信号通过第一频段的电磁波进行传输；所述应答信号通过第二频段的电磁波传输；所述数据信号通过所述第二频段的电磁波传输；所述第二频段的频率高于所述第一频段的频率。
PCT/CN2018/081015 2017-10-27 2018-03-29 无线通信方法及设备 WO2019080449A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201711022798.XA CN107888225A (zh) 2017-10-27 2017-10-27 无线通信方法及设备
CN201711022798.X 2017-10-27

Publications (1)

Publication Number Publication Date
WO2019080449A1 true WO2019080449A1 (zh) 2019-05-02

Family

ID=61782746

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/081015 WO2019080449A1 (zh) 2017-10-27 2018-03-29 无线通信方法及设备

Country Status (2)

Country Link
CN (1) CN107888225A (zh)
WO (1) WO2019080449A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112703762B (zh) * 2019-08-22 2023-06-06 北京小米移动软件有限公司 多频段通信方法及装置
CN113921158A (zh) * 2021-10-08 2022-01-11 北京广利核系统工程有限公司 一种核电站dcs设备故障解析方法及装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102318392A (zh) * 2009-02-26 2012-01-11 索尼公司 通信装置和通信方法、计算机程序和通信系统
CN102545972A (zh) * 2012-01-18 2012-07-04 中兴通讯股份有限公司 一种近距离无线通信设备及近距离无线通信方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110286322A1 (en) * 2009-11-20 2011-11-24 Qualcomm Incorporated Method and apparatus for seamless transitions of data transmission transfer between radio links
US8885621B2 (en) * 2010-04-26 2014-11-11 Intel Corporation Method, apparatus and system for switching traffic streams among multiple bands
EP2974494B1 (en) * 2013-03-15 2020-11-18 Interdigital Patent Holdings, Inc. Multi-band operation for wireless lan systems
CN103826236B (zh) * 2014-02-27 2017-08-22 西安电子科技大学 控制信息与业务分离的分层异构毫米波无线局域网架构
CN104796919B (zh) * 2015-03-13 2018-10-09 中国工程物理研究院电子工程研究所 一种双频结合的太赫兹无线局域网协议构架

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102318392A (zh) * 2009-02-26 2012-01-11 索尼公司 通信装置和通信方法、计算机程序和通信系统
CN102545972A (zh) * 2012-01-18 2012-07-04 中兴通讯股份有限公司 一种近距离无线通信设备及近距离无线通信方法

Also Published As

Publication number Publication date
CN107888225A (zh) 2018-04-06

Similar Documents

Publication Publication Date Title
US20220132423A1 (en) Power saving mechanisms for multi-link communications
CN107431544B (zh) 用于设备到设备通信的方法和装置
US8503968B2 (en) Method and system for power saving in wireless communications
WO2018136522A1 (en) Multi-link block acknowledgement management
US20230379999A1 (en) Wireless communication method using multi-link, and wireless communication terminal using same
US20230164835A1 (en) Updating a contention window size
US20190373439A1 (en) Scheduled and triggered mmw discovery assistance by lower band signaling
CN108923893B (zh) 在蓝牙会话之后重新启用数据帧聚合的方法、设备和介质
EP3579455A1 (en) Method and apparatus for broadband wireless local area communication which use a relay in transceiving operation
WO2013189347A2 (zh) 一种毫米波通信空间复用传输方法及毫米波通信设备
KR20100042228A (ko) 멀티캐스트 프레임 전송방법 및 중복 프레임 검출 방법
US9445455B2 (en) Communication apparatus and communication method
KR20100113967A (ko) 멀티캐스트 프레임 처리 방법 및 장치
WO2018137664A1 (zh) 传输方法、网络设备和终端设备
US20230309151A1 (en) Wireless communication method using multiple links, and wireless communication terminal using same
WO2018209706A1 (en) Methods providing control and data frames using different beam widths and/or frequencies and related wireless communication nodes
WO2019072175A1 (zh) 一种天线切换方法及设备
US10660125B2 (en) Base station apparatus, wireless terminal apparatus, and wireless communication method
WO2020132862A1 (zh) 一种上行传输的功率控制方法及终端设备、网络设备
WO2019080449A1 (zh) 无线通信方法及设备
WO2019201185A1 (zh) 一种蓝牙传输控制方法、系统及存储介质
CN116567718A (zh) 高效高带宽利用率的太赫兹无线网络定向接入控制方法
KR20230001539A (ko) 무선랜에서 emlsr 동작을 위한 방법 및 장치
WO2024153100A1 (zh) 一种通信方法和通信装置
WO2024026787A1 (zh) 一种载波配置方法及装置、终端设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18869688

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18869688

Country of ref document: EP

Kind code of ref document: A1