WO2021120182A1 - 数据传输方法、装置及通信设备 - Google Patents

数据传输方法、装置及通信设备 Download PDF

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Publication number
WO2021120182A1
WO2021120182A1 PCT/CN2019/127051 CN2019127051W WO2021120182A1 WO 2021120182 A1 WO2021120182 A1 WO 2021120182A1 CN 2019127051 W CN2019127051 W CN 2019127051W WO 2021120182 A1 WO2021120182 A1 WO 2021120182A1
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Prior art keywords
frame
transmission
bits
data
duration
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PCT/CN2019/127051
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English (en)
French (fr)
Inventor
董贤东
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北京小米移动软件有限公司
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.)
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Publication date
Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to US17/786,657 priority Critical patent/US20230012583A1/en
Priority to CN201980003671.4A priority patent/CN113287364B/zh
Priority to PCT/CN2019/127051 priority patent/WO2021120182A1/zh
Priority to EP19956361.0A priority patent/EP4080981A4/en
Publication of WO2021120182A1 publication Critical patent/WO2021120182A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • H04W74/0891—Non-scheduled access, e.g. ALOHA using a dedicated channel for access for synchronized access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames

Definitions

  • This application relates to the field of wireless communication technology but is not limited to the field of wireless communication technology, and in particular to data transmission methods, devices and communication equipment.
  • the Institute of Electrical and Electronics Engineers established a Study Group (SG, Study Group) to study the next-generation mainstream Wi-Fi technology, ie the IEEE802.11be standard.
  • the scope of the study is: Wi-Fi transmission with a maximum bandwidth of 320MHz, and multiple frequency bands/
  • the vision proposed is to increase the speed and throughput by at least four times.
  • the main application scenarios of the new technology are video transmission, augmented reality (AR, Augmented Reality), virtual reality (VR, Virtual Reality), etc.
  • the aggregation and collaboration technology of multiple frequency bands refers to multiple transmission connections between Wi-Fi devices in different frequency bands such as 2.4GHz, 5.8GHz and 6-7GHz at the same time, or multiple transmission connections with different bandwidths in the same frequency band. To communicate.
  • the embodiments of the present disclosure provide a data transmission method, device, and communication equipment.
  • a data transmission method wherein, when applied to a first communication device, the method includes:
  • the frame length of the message frame transmitted by each transmission connection is determined based on the maximum random backoff number of the multiple transmission connections.
  • a data transmission method wherein, applied to a second communication device, the method includes:
  • the frame length of the message frame transmitted by each transmission connection is determined based on the maximum random backoff number of the multi-transport connection when there are at least two different random backoff numbers of the transmission connection.
  • a data transmission device which is applied to a first communication device, and the device includes: a first determining module, wherein,
  • the first determining module is configured to, for synchronous transmission of multiple transmission connections, when there are at least two of the transmission connections with different random backoff numbers, determine each of the transmissions based on the maximum random backoff number of the multiple transmission connections The frame length of the message frame transmitted by the connection.
  • a data transmission device which is applied to a second communication device, and the device includes: a receiving module, wherein:
  • the receiving module is configured to receive a plurality of message frames transmitted in a synchronization mode of multiple transmission connections
  • the frame length of the message frame transmitted by each transmission connection is determined based on the maximum random backoff number of the multi-transport connection when there are at least two different random backoff numbers of the transmission connection.
  • a communication device including a processor, a transceiver, a memory, and an executable program stored on the memory and capable of being run by the processor, wherein the processor runs all When the executable program is described, the steps of the data transmission method described in the first aspect or the second aspect are executed.
  • the data transmission method, device, and communication equipment provided by the embodiments of the present disclosure.
  • the communication equipment aims at synchronous transmission of multiple transmission connections.
  • the backoff number determines the frame length of the message frame transmitted by each transmission connection. In this way, based on the maximum random backoff number, that is, based on the time point when the data frame in multiple transmission connections arrives at the data frame receiving end at the latest, by adjusting the frame length of the data frame in each transmission connection, the transmission time of the data frame is adjusted.
  • the synchronization of the time when the data frame arrives at the receiving end of the data frame in each transmission connection is realized, reducing the inconsistency of the time when the data frames arrive at the receiving end of the data frame in multiple transmission connections, improving the success rate of synchronous transmission, and improving the effective utilization of the spectrum .
  • Fig. 1 is a schematic diagram showing synchronous transmission of multiple transmission connections according to an exemplary embodiment
  • Fig. 2 is a schematic diagram showing another synchronous transmission of multiple transmission connections according to an exemplary embodiment
  • Fig. 3 is a schematic flowchart of a data transmission method according to an exemplary embodiment
  • Fig. 4 is a schematic flowchart showing another data transmission method according to an exemplary embodiment
  • Fig. 5 is a schematic flowchart showing yet another data transmission method according to an exemplary embodiment
  • Fig. 6 is a block diagram showing the structure of a data transmission device according to an exemplary embodiment
  • Fig. 7 is a block diagram showing the structure of another data transmission device according to an exemplary embodiment
  • Fig. 8 is a block diagram showing a device for data transmission according to an exemplary embodiment.
  • first, second, third, etc. may be used to describe various information in the embodiments of the present disclosure, the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other.
  • first information may also be referred to as second information, and similarly, the second information may also be referred to as first information.
  • word “if” as used herein can be interpreted as "when” or "when” or "in response to determination”.
  • the executive bodies involved in the embodiments of the present disclosure include, but are not limited to: wireless communication networks, especially Wi-Fi networks, such as under the IEEE802.11a/b/g/n/ac standard, and next-generation Wi-Fi networks, such as under the IEEE802.11be standard.
  • Communication equipment including but not limited to: Wi-Fi routers and other wireless access point (AP, Access Point) equipment, wireless stations (STA, Station), user terminals, user nodes, mobile terminals or tablet computers, etc. .
  • An application scenario of an embodiment of the present disclosure is that multiple transmission connections transmit data frames, and the data frames are divided according to the transmission and reception time of each transmission connection.
  • the transmission of data frames using multiple transmission connections can be divided into synchronous transmission and asynchronous transmission. .
  • the expected effect of synchronous transmission is shown in Figures 1 and 2.
  • the synchronous transmission expects that the data frames in each transmission connection arrive at the same time at the data frame receiving end.
  • Synchronous transmission makes use of the bandwidth temporarily used by each transmission connection at the same time, and improves the effective utilization rate of the spectrum.
  • the Wi-Fi communication device can use the Listen Before Talking (LBT, Listen Before Talking) method to access the channel.
  • LBT Listen Before Talking
  • the Wi-Fi communication device must monitor the channel resource before sending data, and judge whether the channel resource is in a busy state according to the monitoring result. If it is busy, generate a random backoff number (Backoff) and wait for the random backoff duration determined according to the random backoff number. If the channel resource is in an idle state, the communication device determines that it has a transmission opportunity and can use the channel resource to start sending data .
  • LBT Listen Before Talking
  • this exemplary embodiment provides a data transmission method, which can be applied to a first communication device of wireless communication, and the method includes:
  • Step 301 For synchronous transmission of multiple transmission connections, when at least two transmission connections have different random backoff numbers, determine the frame length of the message frame transmitted by each transmission connection based on the maximum random backoff number of the multiple transmission connections.
  • the wireless communication may be standard Wi-Fi communication such as IEEE802.11be; here, the first wireless communication device may be a data frame sender in Wi-Fi communication technology, and the second wireless communication device may be a Wi-Fi communication technology. Data frame receiver. The first communication device and the second communication device may send data frames through multiple transmission connections.
  • Each transmission connection occupies a transmission frequency band, and multiple transmission connections occupy multiple transmission frequency bands.
  • the transmission frequency band can be multiple Wi-Fi working frequency bands, such as 2.4GHz, 5.8GHz and 6-7GHz, etc.; it can also be transmission The frequency range of the bandwidth occupied by the frequency band.
  • a basic service set (BSS, Basis Service Set) can be formed separately on the occupied bandwidth, for example, a BSS with a bandwidth of 20 MHz is formed.
  • the frequency range of the bandwidth occupied by each transmission frequency band may belong to the same Wi-Fi working frequency band, or may belong to different Wi-Fi working frequency bands.
  • three transmission connections are established between the first communication device and the second communication device.
  • the three transmission connections can respectively belong to the three Wi-Fi working frequency bands of 2.4GHz, 5.8GHz and 6-7GHz; the three transmission connections can also all belong to the 2.4GHz Wi-Fi working frequency band.
  • the three transmission connections can use the same working bandwidth, such as 20MHz working bandwidth.
  • the three transmission connections can also use different working bandwidths, such as 20MHz, 40MHz, and 80MHz working bandwidths respectively.
  • the Wi-Fi communication device must monitor the channel resource before sending data. If the channel resource is busy, it generates a random backoff number and waits for the random backoff time determined according to the random backoff number. If the channel resource is idle, then The channel resources can be used to start sending data.
  • a random backoff number may correspond to the duration of a time slot, that is, the random backoff duration corresponding to a random backoff number is the duration of a time slot, for example, the duration of a time slot is 5 microseconds.
  • the message frame can be a data frame, management frame, etc. in Wi-Fi communication.
  • the message frame can be a data frame, management frame, etc. in Wi-Fi communication.
  • the transmission time of each transmission connection to send the data frame is shifted.
  • the generated random backoff number is the largest, that is, the random backoff duration is the longest, then it is determined to obtain the transmission compared to other transmission connections in the multiple transmission connections.
  • the time of opportunity is the latest.
  • the time for the data frame to arrive at the receiving end of the data frame is the latest.
  • the time for the data frame to reach the data frame receiving end in each transmission connection can be adjusted based on the maximum random backoff number, that is, based on the latest time of the data frame arriving at the data frame receiving end in multiple transmission connections.
  • the latest time the data frame arrives at the receiving end of the data frame can be used as a reference, and the frame length of the message frame in each transmission connection can be adjusted so that the time of the data frame arriving at the receiving end of the data frame in each processing connection is the same.
  • the data frame sender uses a transmission connection for data frame transmission, the generated random backoff number is the smallest, then the data frame transmitted by the data frame sender using synchronous transmission arrives at the data frame receiver earlier than the random backoff number The largest transmission connection.
  • the frame length of the data frame in the transmission connection with the smallest random backoff number can be adjusted to extend the transmission duration of the data frame, and the time from which the data frame reaches the receiving end of the data frame can be extended.
  • the frame length adjustment amount of the transmission connection with the largest random backoff number may be 0.
  • the transmission time of the data frame is adjusted.
  • the synchronization of the time when the data frame arrives at the receiving end of the data frame in each transmission connection is realized, reducing the inconsistency of the time when the data frames arrive at the receiving end of the data frame in multiple transmission connections, improving the success rate of synchronous transmission, and improving the effective utilization of the spectrum .
  • step 201 may include: adding n bits to the original frame length of the message frame based on the maximum random backoff number of the multi-transport connection and the random backoff number of the transmission connection where the message frame is located; where n is greater than Or an integer equal to 0.
  • the message frame may be a data frame, an RTS frame sent before the data frame, and the like.
  • the transmission time of the message frame is extended.
  • the time point from the data frame to the receiving end of the big data frame in each transmission connection can be the same as the time point when the data frame arrives at the receiving end of the data frame in the transmission connection with the largest random backoff number, so as to realize the data in each transmission connection.
  • the time point from the frame to the receiving end of the big data frame is the same, thereby improving the success rate of synchronous transmission.
  • n can be 0, indicating that the random backoff number of the transmission connection is the maximum random backoff number, and no bit needs to be added in the message frame.
  • the n bits can adopt a predetermined value. In this way, after receiving the message frame with n bits added, the data frame receiving end can determine the n bits added in the message frame, and remove the n bits added in the message frame, and Read the data content of the message frame after n bits have been removed.
  • the transmission duration of n bits is: the product of the difference between the maximum random backoff number and the random backoff number of the transmission connection where the message frame is located, and the time slot duration.
  • the random backoff duration corresponding to a random backoff number is the duration of a time slot. Therefore, the time difference between the random backoff duration of each transmission connection and the maximum random backoff duration can be determined according to the difference between the random backoff number of each transmission connection and the maximum random backoff number.
  • the product of the random backoff number multiplied by the time slot duration is the random backoff duration.
  • the difference between the maximum random backoff number and the random backoff number of the transmission connection of the data frame multiplied by the time slot duration is the difference between the random backoff duration of the transmission connection of the data frame and the random backoff duration of the transmission connection of the maximum random backoff number .
  • the transmission time of the message frame in each transmission connection is the same, and the message frame of the transmission connection
  • the time difference to the receiving end of the data frame is the difference in the random backoff time of the transmission connection. The shorter the random backoff time, the earlier the message frame arrives at the data frame receiving end; the longer the random backoff time, the later the message frame arrives at the data frame receiving end.
  • Each transmission connection can determine the number of bits added according to the difference between its own random back-off time and the maximum random back-off time, so that the time point when the message frame of each transmission connection reaches the data frame receiving end and the maximum random back-off number.
  • the message frame arrives at the data in the transmission connection.
  • the time point of the frame receiving end is the same. You can extend the transmission time of the message frame by adding bits, thereby extending the time for the message frame to reach the data frame receiving end.
  • the message frame can be a data frame or a clear to send frame CTS (clear to send). ).
  • the random backoff number of the mth transmission connection is i
  • the largest random backoff number among multiple transmission connections is j
  • j is greater than i.
  • the difference between the random backoff duration of the mth transmission connection and the random backoff duration of the transmission connection with the largest random backoff number is (ji)*time slot duration, that is, the message frame of the mth transmission connection will advance the transmission connection with the largest random backoff number
  • the message frame in the data frame arrives at the data frame receiving end.
  • n bits can be added to the original frame length of the message frame of the mth transmission connection, and n can be determined according to the difference of the random back-off time, so that the transmission time of n bits for the m-th transmission connection is equal to the random back-off time. difference. In this way, the time point when the message frame of the m-th transmission connection after adding the n bits and the message frame of the transmission connection with the largest random backoff number arrive at the data frame receiving end is the same.
  • the number of bits added to the original frame length of the message frame of each transmission connection can be determined according to the time difference between the random back-off duration of each transmission connection and the maximum random back-off duration.
  • the transmission duration of the added n bits is equal to the time difference between the random back-off duration of each transmission connection and the maximum random back-off duration.
  • the number of bits added to the original frame length of the message frame in each transmission connection may be the same or different.
  • adding n bits to the original frame length of the message frame may include: adding n bits to the original frame length of the RTS frame or data frame when the message frame transmitted by the transmission connection includes a request to send an RTS frame .
  • Wi-Fi communication equipment can use the request to send (RTS, Request to Send)/allow to send (CTS, Clear to Send) mechanism.
  • RTS request to send
  • CTS Clear to Send
  • the data frame receiver sends the RTS frame and waits for the data frame to be received. After the end responds to the CTS frame, the data frame sending end starts to send the data frame again.
  • the transmission connection transmits RTS frames and data frames.
  • the sending end of the data frame can add n bits to the RTS frame, which can extend the transmission time of the RTS frame, and then delay the time point when the data frame sent after the RTS frame arrives at the receiving end of the data frame.
  • n bits are added to the RTS frame
  • the Length field in the RTS frame needs to be changed according to the length of the RTS frame after n bits are added.
  • the length field is located in the signal (SIG) subfield of the physical header of the RTS frame.
  • the data frame sending end can also add n bits to the data frame, which can extend the transmission time of the data frame, thereby delaying the time for the data frame to reach the data frame receiving end Therefore, the difference between the random back-off duration of the transmission connection with the maximum random back-off number can be compensated, and the time for the data frame to reach the data frame receiving end in each transmission connection can be made equal.
  • n bits can be added at the end of the data frame. After n bits are added to the data frame, the Length field in the data frame needs to be changed according to the length of the data frame after n bits are added. Among them, the length field is located in the signal (SIG) subfield of the physical header of the data frame.
  • the n bits can adopt a predetermined value.
  • the data frame receiving end can determine the n bits added in the message frame, and remove the addition in the RTS frame or data frame And read the data content of the RTS frame or data frame after n bits have been removed.
  • adding n bits to the original frame length of the message frame may include: when the message frame transmitted by the transmission connection does not include an RTS frame, adding n bits to the original frame length of the data frame.
  • the transmission connection may also not use the RTS/CTS mechanism for data frame transmission, that is, the transmission connection is not used to transmit RTS and CTS frames.
  • the sending end of the data frame can add n bits to the data frame, so that the transmission time of the data frame can be prolonged, so that the time point when the data frame arrives at the receiving end of the data frame can be delayed, and the transmission connection with the maximum random backoff number can be compensated.
  • the difference between the random backoff durations can make the time for the data frame to arrive at the data frame receiving end in each transmission connection to be equal.
  • n bits can be added at the end of the data frame.
  • the Length field in the data frame needs to be changed according to the length of the data frame after n bits are added.
  • the length field is located in the signal (SIG) subfield of the physical header of the data frame.
  • the n bits can use a predetermined value. In this way, after receiving the data frame with n bits added, the data frame receiving end can determine the n bits added in the message frame, and remove the n bits added in the data frame, and Read the data content of the data frame after n bits have been removed.
  • the transmission time of the message frame is lengthened, so that the time for the data frame of each transmission connection to reach the data frame receiving end is equal to the maximum random backoff number corresponding to the transmission connection.
  • the time when the data frame arrives at the receiving end of the data frame improves the success rate of synchronous transmission.
  • the data transmission method may further include:
  • Step 302 Determine the duration of the channel resource occupied by the transmission connection indicated by the duration field of the message frame according to the transmission duration of n bits.
  • n bits can be added to the RTS frame or data frame.
  • the data frame sender can set the duration indicated by the duration field of each transmission connection RTS frame as: data frame transmission duration + CTS transmission duration + 3 * short frame interval (SIFS, Short Interframe Space) duration + confirmation ( ACK) frame duration + (maximum random backoff number-current transmission connection random backoff number) * slot time (aslottime).
  • the data frame transmission duration can be the original data frame transmission duration without adding n bits, (the maximum random backoff number-the current transmission connection random backoff number) * slot time (aslottime) is the transmission of n bits in the RTS frame duration.
  • the duration field may be located in the MAC frame header of the RTS frame.
  • the duration related to the short frame interval in the duration indicated by the duration field can be set as: (number of sub-data frames +3)*Short frame interval duration.
  • n bits can be added to the RTS frame or data frame.
  • the data frame receiving end will send a CTS frame to the data frame sending end after receiving the RTS.
  • the duration indicated by the duration field of the received RTS frame includes n-bit transmission duration
  • the data frame receiver can set the duration indicated by the CTS frame duration field as: original data frame transmission duration + CTS frame transmission Duration+2*short frame interval duration+confirmation frame duration+(maximum random backoff number-current transmission connection random backoff number)*time slot duration.
  • the data frame transmission duration may be the original data frame transmission duration without adding n bits.
  • the duration field may be located in the MAC frame header of the CTS frame.
  • the duration related to the short frame interval in the duration indicated by the duration field can be set as: (number of sub-data frames +2)*Short frame interval duration.
  • n bits can be added to the RTS frame or data frame.
  • the data frame sender can set the duration indicated by the duration field of each transmission connection data frame as: data frame transmission duration + CTS frame transmission duration + 1 * short frame interval duration + confirmation frame duration + (maximum random backoff number-current Transmission connection random backoff number) * time slot duration.
  • the data frame transmission duration may be the original data frame transmission duration without adding n bits.
  • the duration related to the short frame interval in the duration indicated by the duration field can be set as: (number of sub-data frames +1)*Short frame interval duration.
  • n bits can be added to the data frame.
  • the data frame sender can set the duration indicated by the duration field of each transmission connection data frame as: data frame transmission duration + CTS frame transmission duration + 1 * short frame interval duration + confirmation frame duration + (maximum random backoff number-current Transmission connection random backoff number) * time slot duration.
  • the data frame transmission duration may be the original data frame transmission duration without adding n bits.
  • the duration related to the short frame interval in the duration indicated by the duration field can be set as: (number of sub-data frames +1)*Short frame interval duration. If the data frame is a continuous data frame, then SIFS* (number of data frames + 1).
  • the data transmission method may further include: using the same modulation and coding mode MCS for the n bits added to the message frame and the content of the message frame other than the n bits.
  • the n bits added in the RTS frame can use the same MSC as the content of the RTS frame other than the n bits. In this way, the efficiency of RTS frame processing can be improved.
  • the n bits added in the data frame can use the same MSC as the content of the data frame other than the n bits. In this way, the processing of the data frame can be improved. effectiveness.
  • a demodulation and decoding method corresponding to the MSC can be used to receive the RTS frame or data frame, thereby improving the receiving efficiency.
  • this exemplary embodiment provides a data transmission method, which can be applied to a second communication device of wireless communication, and the method includes:
  • Step 501 Receive multiple message frames transmitted in a synchronization mode of multiple transmission connections
  • the frame length of the message frame transmitted by each transmission connection is determined based on the maximum random backoff number of the multi-transmission connection when there are at least two transmission connections with different random backoff numbers.
  • the wireless communication may be standard Wi-Fi communication such as IEEE802.11be; here, the first wireless communication device may be a data frame sender in Wi-Fi communication technology, and the second wireless communication device may be a Wi-Fi communication technology. Data frame receiver. The first communication device and the second communication device may send data frames through multiple transmission connections.
  • Each transmission connection occupies a transmission frequency band, and multiple transmission connections occupy multiple transmission frequency bands.
  • the transmission frequency band can be multiple Wi-Fi working frequency bands, such as 2.4GHz, 5.8GHz and 6-7GHz, etc.; it can also be transmission The frequency range of the bandwidth occupied by the frequency band.
  • a basic service set (BSS, Basis Service Set) can be formed separately on the occupied bandwidth, for example, a BSS with a bandwidth of 20 MHz is formed.
  • the frequency range of the bandwidth occupied by each transmission frequency band may belong to the same Wi-Fi working frequency band, or may belong to different Wi-Fi working frequency bands.
  • three transmission connections are established between the first communication device and the second communication device.
  • the three transmission connections can respectively belong to the three Wi-Fi working frequency bands of 2.4GHz, 5.8GHz and 6-7GHz; the three transmission connections can also all belong to the 2.4GHz Wi-Fi working frequency band.
  • the three transmission connections can use the same working bandwidth, such as 20MHz working bandwidth.
  • the three transmission connections can also use different working bandwidths, such as 20MHz, 40MHz, and 80MHz working bandwidths respectively.
  • the Wi-Fi communication device must monitor the channel resource before sending data. If the channel resource is busy, it generates a random backoff number and waits for the random backoff time determined according to the random backoff number. If the channel resource is idle, then The channel resources can be used to start sending data.
  • a random backoff number may correspond to the duration of a time slot, that is, the random backoff duration corresponding to a random backoff number is the duration of a time slot, for example, the duration of a time slot is 5 microseconds.
  • the message frame can be a data frame, management frame, etc. in Wi-Fi communication.
  • the message frame can be a data frame, management frame, etc. in Wi-Fi communication.
  • the transmission time of each transmission connection to send data frames is shifted.
  • the generated random backoff number is the largest, that is, the random backoff duration is the longest, then it is determined to obtain the transmission compared to other transmission connections in the multiple transmission connections.
  • the time of opportunity is the latest.
  • the time for the data frame to arrive at the receiving end of the data frame is the latest.
  • the time for the data frame to reach the data frame receiving end in each transmission connection can be adjusted based on the maximum random backoff number, that is, based on the latest time of the data frame arriving at the data frame receiving end in multiple transmission connections.
  • the latest time the data frame arrives at the receiving end of the data frame can be used as a reference, and the frame length of the message frame in each transmission connection can be adjusted so that the time of the data frame arriving at the receiving end of the data frame in each processing connection is the same.
  • the data frame sender uses a transmission connection for data frame transmission, the generated random backoff number is the smallest, then the data frame transmitted by the data frame sender using synchronous transmission arrives at the data frame receiver earlier than the random backoff number
  • the frame length of the data frame in the transmission connection with the smallest random backoff number can be adjusted to extend the transmission time of the data frame, and from the time for the data frame to reach the receiving end of the data frame.
  • the frame length adjustment amount of the transmission connection with the largest random backoff number may be 0.
  • the transmission time of the data frame is adjusted.
  • the synchronization of the time when the data frame arrives at the receiving end of the data frame in each transmission connection is realized, reducing the inconsistency of the time when the data frames arrive at the receiving end of the data frame in multiple transmission connections, improving the success rate of synchronous transmission, and improving the effective utilization of the spectrum .
  • the data transmission method may further include:
  • the received message frame includes a request to send an RTS frame
  • remove the n bits added in the RTS frame and read the data content of the RTS frame after n bits have been removed, or remove the added data in the data frame contained in the message frame n bits, and read the data content of the data frame after n bits have been removed; where n is an integer greater than or equal to 0.
  • Wi-Fi communication equipment can use the request to send (RTS, Request to Send)/allow to send (CTS, Clear to Send) mechanism.
  • RTS request to send
  • CTS Clear to Send
  • the data frame receiver sends the RTS frame and waits for the data frame to be received. After the end responds to the CTS frame, the data frame sending end starts to send the data frame again.
  • the transmission connection transmits RTS frames and data frames.
  • the sending end of the data frame can add n bits to the RTS frame, which can extend the transmission time of the RTS frame, and then delay the time point when the data frame sent after the RTS frame arrives at the receiving end of the data frame.
  • n bits are added to the RTS frame
  • the Length field in the RTS frame needs to be changed according to the length of the RTS frame after n bits are added.
  • the length field is located in the signal (SIG) subfield of the physical header of the RTS frame.
  • the data frame sending end can also add n bits to the data frame, which can extend the transmission time of the data frame, thereby delaying the time for the data frame to reach the data frame receiving end Therefore, the difference between the random back-off duration of the transmission connection with the maximum random back-off number can be compensated, and the time for the data frame to reach the data frame receiving end in each transmission connection can be made equal.
  • n bits can be added at the end of the data frame. After n bits are added to the data frame, the Length field in the data frame needs to be changed according to the length of the data frame after n bits are added. Among them, the length field is located in the signal (SIG) subfield of the physical header of the data frame.
  • the n bits can adopt a predetermined value.
  • the data frame receiving end can determine the n bits added in the message frame, and remove the addition in the RTS frame or data frame And read the data content of the RTS frame or data frame after n bits have been removed.
  • the data transmission method may further include:
  • n bits determine the duration of the channel resource occupied by the transmission connection indicated by the duration field of the CTS frame; send the CTS frame.
  • n bits can be added to the RTS frame or data frame.
  • the data frame receiving end will send a CTS frame to the data frame sending end after receiving the RTS.
  • the duration indicated by the duration field of the received RTS frame includes n-bit transmission duration
  • the data frame receiver can set the duration indicated by the CTS frame duration field as: original data frame transmission duration + CTS frame transmission Duration+2*short frame interval duration+confirmation frame duration+(maximum random backoff number-current transmission connection random backoff number)*time slot duration.
  • the data frame transmission duration may be the original data frame transmission duration without adding n bits.
  • the duration field may be located in the MAC frame header of the CTS frame.
  • the duration related to the short frame interval in the duration indicated by the duration field can be set as: (number of sub-data frames +2)*Short frame interval duration.
  • the data transmission method may further include:
  • n bits added in the data frame When the received message frame does not include the RTS frame, remove the n bits added in the data frame, and read the data content of the data frame after the n bits have been removed, where n is an integer greater than or equal to 0.
  • the transmission connection may also not use the RTS/CTS mechanism for data frame transmission, that is, the transmission connection is not used to transmit RTS and CTS frames.
  • the sending end of the data frame can add n bits to the data frame, so that the transmission time of the data frame can be extended, so that the time point when the data frame arrives at the receiving end of the data frame can be delayed, and the transmission connection with the maximum random backoff number can be compensated.
  • the difference between the random backoff durations can make the time for the data frame to reach the data frame receiving end in each transmission connection to be equal.
  • n bits can be added at the end of the data frame.
  • the Length field in the data frame needs to be changed according to the length of the data frame after n bits are added.
  • the length field is located in the signal (SIG) subfield of the physical header of the data frame.
  • the n bits can use a predetermined value. In this way, after receiving the data frame with n bits added, the data frame receiving end can determine the n bits added in the message frame, and remove the n bits added in the data frame, and Read the data content of the data frame after n bits have been removed.
  • the transmission time of the message frame is lengthened, so that the time for the data frame of each transmission connection to reach the data frame receiving end is equal to the maximum random backoff number corresponding to the transmission connection.
  • the time when the data frame arrives at the receiving end of the data frame improves the success rate of synchronous transmission.
  • the utilization efficiency of the data frame spectrum can be filled with bits in the data frame and at the end of the data frame;
  • the length of the added bit can be determined according to the transmission time of the added bit.
  • the transmission time of the added bit is: (max(link1 backoff, link2 backoff,%)-random backoff number of the transmission connection) * time slot duration ( aslottime), where max(link1 backoff, link2 backoff,...) represents the largest random backoff number among the random backoff numbers of each transmission connection.
  • the RTS/CTS mechanism is used for data transmission.
  • the data frame sender sets the length field of the signal (SIG) subfield in the physical header of the RTS frame according to the frame length of the RTS frame under each transmission connection, and sets the MAC frame
  • the duration indicated by the duration field in the header is: data frame length+CTS length+3*SIFS+ACK+(max(link1 backoff, link2 backoff,...)-self random backoff number)*(time slot Duration) aslottime.
  • the data frame transmission duration may be the original data frame transmission duration without adding bits.
  • the duration related to the short frame interval in the duration indicated by the duration field can be set as: (number of consecutive data frame sub-data frames + 3) * short frame interval duration.
  • the data frame receiver can set the duration indicated by the duration field in the MAC frame header of the CTS frame as: data frame length+2*SIFS+ACK+(max(link1 backoff, link2 backoff,...)-self random Backoff number) * Time slot duration.
  • the data frame transmission duration may be the original data frame transmission duration without adding bits.
  • the sender of the data frame can set the duration indicated by the duration field in the MAC frame header of the data frame as: data frame length+1*SIFS+ACK+(max(link1 backoff, link2 backoff,...)-own Random backoff number) * time slot duration.
  • the data frame transmission duration may be the original data frame transmission duration without adding bits.
  • the RTS/CTS mechanism is not used for data transmission, and the transmission connection directly sends data frames.
  • the backoff counting method is the same as in the above step A, the length of the physical header SIG subdomain length field and the duration field in the MAC frame header of the data frame under each transmission connection are: data frame length + 1*SIFS+ACK+(max(link1 backoff, link2 backoff,...)-self random backoff number)*time slot duration.
  • the data frame transmission duration may be the original data frame transmission duration without adding bits.
  • the duration related to the short frame interval in the duration indicated by the duration field can be set as: (number of consecutive data frame sub-data frames + 3) * short frame interval duration.
  • FIG. 6 is a schematic diagram of the composition structure of the data transmission device 100 provided by the embodiment of the present invention; as shown in FIG. 6, the device 100 includes : The first determining module 110, where
  • the first determining module 110 is configured to, for synchronous transmission of multiple transmission connections, determine the frame of the message frame transmitted by each transmission connection based on the maximum random backoff number of the multiple transmission connection when the random backoff numbers of at least two transmission connections are different. long.
  • the first determining module 110 includes:
  • the determining submodule 111 is configured to add n bits to the original frame length of the message frame based on the maximum random backoff number of the multi-transmission connection and the random backoff number of the transmission connection where the message frame is located;
  • n is an integer greater than or equal to 0.
  • the transmission duration of n bits is: the product of the difference between the maximum random backoff number and the random backoff number of the transmission connection where the message frame is located, and the time slot duration.
  • the determining submodule 111 includes:
  • the first determining unit 1111 is configured to add n bits to the original frame length of the RTS frame or the data frame when the message frame transmitted by the transmission connection includes the request to send the RTS frame.
  • the determining submodule 111 includes:
  • the second determining unit 1112 is configured to add n bits to the original frame length of the data frame when the message frame transmitted by the transmission connection does not include the RTS frame.
  • the apparatus 100 further includes:
  • the second determining module 120 is configured to determine the duration of the channel resource occupied by the transmission connection indicated by the duration field of the message frame according to the transmission duration of n bits.
  • the apparatus 100 further includes:
  • the encoding module 130 is configured to use the same modulation and encoding mode MCS for the n bits added to the message frame and the content of the message frame other than the n bits.
  • FIG. 7 is a schematic diagram of the structure of the data transmission device 200 provided by the embodiment of the present invention; as shown in FIG. :Receiving module 210, in which,
  • the receiving module 210 is configured to receive multiple message frames transmitted in a synchronization mode of multiple transmission connections
  • the frame length of the message frame transmitted by each transmission connection is determined based on the maximum random backoff number of the multi-transmission connection when there are at least two transmission connections with different random backoff numbers.
  • the apparatus 200 further includes:
  • the first processing module 220 is configured to, when the received message frame includes a request to send an RTS frame,
  • n is an integer greater than or equal to 0.
  • the apparatus 200 further includes:
  • the third determining module 230 is configured to determine the duration of the channel resource occupied by the transmission connection indicated by the duration field of the CTS frame according to the transmission duration of n bits
  • the apparatus 200 further includes:
  • the second processing module 240 is configured to, when the received message frame does not include an RTS frame,
  • n is an integer greater than or equal to 0.
  • the first determining module 110, the second determining module 120, the encoding module 130, the receiving module 210, the first processing module 220, the third determining module 230, and the second processing module 240 may be configured by one or more A central processing unit (CPU, Central Processing Unit), graphics processing unit (GPU, Graphics Processing Unit), baseband processor (BP, baseband processor), application specific integrated circuit (ASIC, Application Specific Integrated Circuit), DSP, programmable Logic devices (PLD, Programmable Logic Device), complex programmable logic devices (CPLD, Complex Programmable Logic Device), Field-Programmable Gate Array (FPGA, Field-Programmable Gate Array), general-purpose processors, controllers, microcontrollers ( MCU, Micro Controller Unit, Microprocessor (Microprocessor), or other electronic components are implemented to execute the foregoing method.
  • CPU Central Processing Unit
  • GPU Graphics Processing Unit
  • BP baseband processor
  • ASIC Application Specific Integrated Circuit
  • DSP digital signal processor
  • PLD programmable Logic Device
  • Fig. 8 is a block diagram showing a device 3000 for data transmission or transmission block configuration parameter determination according to an exemplary embodiment.
  • the device 3000 may be a mobile phone, a computer, a digital broadcasting terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.
  • the device 3000 may include one or more of the following components: a processing component 3002, a memory 3004, a power supply component 3006, a multimedia component 3008, an audio component 3010, an input/output (I/O) interface 3012, a sensor component 3014, And the communication component 3016.
  • a processing component 3002 a memory 3004, a power supply component 3006, a multimedia component 3008, an audio component 3010, an input/output (I/O) interface 3012, a sensor component 3014, And the communication component 3016.
  • the processing component 3002 generally controls the overall operations of the device 3000, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations.
  • the processing component 3002 may include one or more processors 3020 to execute instructions to complete all or part of the steps of the foregoing method.
  • the processing component 3002 may include one or more modules to facilitate the interaction between the processing component 3002 and other components.
  • the processing component 3002 may include a multimedia module to facilitate the interaction between the multimedia component 3008 and the processing component 3002.
  • the memory 3004 is configured to store various types of data to support the operation of the device 3000. Examples of such data include instructions for any application or method operating on the device 3000, contact data, phone book data, messages, pictures, videos, etc.
  • the memory 3004 can be implemented by any type of volatile or non-volatile storage device or their combination, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic Disk or Optical Disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read-only memory
  • EPROM erasable Programmable Read Only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Magnetic Memory Flash Memory
  • Magnetic Disk Magnetic Disk or Optical Disk.
  • the power supply component 3006 provides power for various components of the device 3000.
  • the power supply component 3006 may include a power management system, one or more power supplies, and other components associated with the generation, management, and distribution of power for the device 3000.
  • the multimedia component 3008 includes a screen that provides an output interface between the device 3000 and the user.
  • the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user.
  • the touch panel includes one or more touch sensors to sense touch, sliding, and gestures on the touch panel. The touch sensor can not only sense the boundary of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation.
  • the multimedia component 3008 includes a front camera and/or a rear camera. When the device 3000 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capabilities.
  • the audio component 3010 is configured to output and/or input audio signals.
  • the audio component 3010 includes a microphone (MIC), and when the device 3000 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive external audio signals.
  • the received audio signal may be further stored in the memory 3004 or transmitted via the communication component 3016.
  • the audio component 3010 further includes a speaker for outputting audio signals.
  • the I/O interface 3012 provides an interface between the processing component 3002 and a peripheral interface module.
  • the above-mentioned peripheral interface module may be a keyboard, a click wheel, a button, and the like. These buttons may include, but are not limited to: home button, volume button, start button, and lock button.
  • the sensor assembly 3014 includes one or more sensors for providing the device 3000 with various aspects of status assessment.
  • the sensor component 3014 can detect the on/off status of the device 3000 and the relative positioning of components, such as the display and keypad of the device 3000.
  • the sensor component 3014 can also detect the position change of the device 3000 or a component of the device 3000. The presence or absence of contact with the device 3000, the orientation or acceleration/deceleration of the device 3000, and the temperature change of the device 3000.
  • the sensor assembly 3014 may include a proximity sensor configured to detect the presence of nearby objects when there is no physical contact.
  • the sensor component 3014 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor component 3014 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor.
  • the communication component 3016 is configured to facilitate wired or wireless communication between the device 3000 and other devices.
  • the device 3000 can access a wireless network based on a communication standard, such as Wi-Fi, 2G or 3G, or a combination thereof.
  • the communication component 3016 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel.
  • the communication component 3016 also includes a near field communication (NFC) module to facilitate short-range communication.
  • the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.
  • RFID radio frequency identification
  • IrDA infrared data association
  • UWB ultra-wideband
  • Bluetooth Bluetooth
  • the device 3000 may be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable A gate array (FPGA), controller, microcontroller, microprocessor, or other electronic components are implemented to implement the above methods.
  • ASIC application specific integrated circuits
  • DSP digital signal processors
  • DSPD digital signal processing devices
  • PLD programmable logic devices
  • FPGA field programmable A gate array
  • controller microcontroller, microprocessor, or other electronic components are implemented to implement the above methods.
  • non-transitory computer-readable storage medium including instructions, such as a memory 3004 including instructions, which may be executed by the processor 3020 of the device 3000 to complete the foregoing method.
  • the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

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Abstract

本公开实施例是关于数据传输方法、装置及通信设备。针对多传输连接的同步传输，当存在至少两个所述传输连接的随机退避数不同时，基于所述多传输连接的最大随机退避数，确定各所述传输连接传输的消息帧的帧长。

Description

数据传输方法、装置及通信设备 技术领域
本申请涉及无线通信技术领域但不限于无线通信技术领域，尤其涉及数据传输方法、装置及通信设备。
背景技术
电气和电子工程师协会成立了学习组(SG，Study Group)来研究下一代主流Wi-Fi技术即IEEE802.11be标准，研究的范围为：最大支持320MHz带宽的Wi-Fi传输、采用多个频段/连接的聚合及协同技术等，提出的愿景相对于现有的IEEE802.11ax标准提高至少四倍的速率以及吞吐量。新技术的主要应用场景为视频传输，增强现实(AR，Augmented Reality)、虚拟现实(VR，Virtual Reality)等。
多个频段的聚合及协同技术是指Wi-Fi设备间同时在2.4GHz、5.8GHz及6-7GHz等不同频段的多个传输连接中，或在相同频段下的不同带宽的多个传输连接中进行通信。
发明内容
本公开实施例提供了一种数据传输方法、装置及通信设备。
根据本公开实施例的第一方面，提供一种数据传输方法，其中，应用于第一通信设备，所述方法包括：
针对多传输连接的同步传输，当存在至少两个所述传输连接的随机退避数不同时，基于所述多传输连接的最大随机退避数，确定各所述传输连接传输的消息帧的帧长。
根据本公开实施例的第二方面，提供一种数据传输方法，其中，应用 于第二通信设备，所述方法包括：
接收采用多传输连接同步方式传输的多个消息帧；
其中，各所述传输连接传输的所述消息帧的帧长，是：当存在至少两个所述传输连接的随机退避数不同时基于所述多传输连接的最大随机退避数确定的。
根据本公开实施例的第三方面，提供一种数据传输装置，其中，应用于第一通信设备，所述装置包括：第一确定模块，其中，
所述第一确定模块，配置为针对多传输连接的同步传输，当存在至少两个所述传输连接的随机退避数不同时，基于所述多传输连接的最大随机退避数，确定各所述传输连接传输的消息帧的帧长。
根据本公开实施例的第四方面，提供一种数据传输装置，其中，应用于第二通信设备，所述装置包括：接收模块，其中，
所述接收模块，配置为接收采用多传输连接同步方式传输的多个消息帧；
其中，各所述传输连接传输的所述消息帧的帧长，是：当存在至少两个所述传输连接的随机退避数不同时基于所述多传输连接的最大随机退避数确定的。
根据本公开实施例的第五方面，提供一种通信设备，包括处理器、收发器、存储器及存储在存储器上并能够有所述处理器运行的可执行程序，其中，所述处理器运行所述可执行程序时执行如第一方面或第二方面所述数据传输方法的步骤。
本公开实施例提供的数据传输方法、装置及通信设备，通信设备针对多传输连接的同步传输，当存在至少两个所述传输连接的随机退避数不同时，基于所述多传输连接的最大随机退避数，确定各所述传输连接传输的消息帧的帧长。如此，基于最大随机退避数，即以多个传输连接中数据帧 最晚到达数据帧接收端的时间点作为基准，通过调整每个传输连接中数据帧的帧长，实现调整数据帧的传输时长，进而实现每个传输连接中数据帧的到达数据帧接收端的时间的同步，减少多个传输连接数据帧到达数据帧接收端时间不一致的情况，提高同步传输的成功率，进而提升频谱的有效利用率。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开实施例。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本发明实施例，并与说明书一起用于解释本发明实施例的原理。
图1是根据一示例性实施例示出的一种多传输连接同步传输示意图；
图2是根据一示例性实施例示出的另一种多传输连接同步传输示意图；
图3是根据一示例性实施例示出的一种数据传输方法的流程示意图；
图4是根据一示例性实施例示出的另一种数据传输方法的流程示意图；
图5是根据一示例性实施例示出的又一种数据传输方法的流程示意图；
图6是根据一示例性实施例示出的一种数据传输装置组成结构框图；
图7是根据一示例性实施例示出的另一种数据传输装置组成结构框图；
图8是根据一示例性实施例示出的一种用于数据传输的装置的框图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本发明实施例相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本发明实施例的一些方面相一致的装置和方法的例子。
在本公开实施例使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本公开实施例。在本公开实施例和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。
应当理解，尽管在本公开实施例可能采用术语第一、第二、第三等来描述各种信息，但这些信息不应限于这些术语。这些术语仅用来将同一类型的信息彼此区分开。例如，在不脱离本公开实施例范围的情况下，第一信息也可以被称为第二信息，类似地，第二信息也可以被称为第一信息。取决于语境，如在此所使用的词语“如果”可以被解释成为“在……时”或“当……时”或“响应于确定”。
本公开实施例涉及的执行主体包括但不限于：无线通信网络尤其是Wi-Fi网络如IEEE802.11a/b/g/n/ac标准下，以及下一代Wi-Fi网络如IEEE802.11be标准下的通信设备，其中，通信设备包括但不限于：Wi-Fi路由器等无线接入点(AP，Access Point)设备、无线站点(STA，Station)、用户终端、用户节点、移动终端或平板电脑等。
本公开实施例的一种应用场景为，多个传输连接传输数据帧，根据每个所述传输连接传输数据帧的收发时间划分，采用多个传输连接传输数据帧可以分为同步传输和异步传输。其中，同步传输期望达到的效果如图1和2所示，同步传输期望在各传输连接中的数据帧到达数据帧接收端的时间相同。同步传输使得在同一时间各个传输连接暂用的带宽都得到了利用，提高频谱的有效利用率。
在单个连接传输下，Wi-Fi通信设备接入信道的可以采用先听后说(LBT，Listen Before Talking)方式。Wi-Fi通信设备在发送数据前必须对信道资源进行监听，根据监听结果判断信道资源是否处于忙(Busy)状态。 如果是忙状态，则生成一个随机退避数(Backoff)，等待根据随机退避数确定的随机退避时长后，如果信道资源处于空闲状态，则通信设备确定获取到发送机会，可以采用信道资源开始发送数据。
由于，多个传输连接中，有至少两个或者每个传输连接的随机退避数都不同，如此，使得数据帧发送端在每个传输连接发送数据帧的时间点发生变化，进而影响每个传输连接中数据帧到的接收端的时间，无法实现同步传输。
如图3所示，本示例性实施例提供一种于数据传输方法，可以应用于无线通信的第一通信设备中，该方法包括：
步骤301：针对多传输连接的同步传输，当存在至少两个传输连接的随机退避数不同时，基于多传输连接的最大随机退避数，确定各传输连接传输的消息帧的帧长。
无线通信可以是IEEE802.11be等标准的Wi-Fi通信；这里，第一无线通信设备可以是Wi-Fi通信技术中的数据帧发送端，第二无线通信设备可以是Wi-Fi通信技术中的数据帧接收端。第一通信设备和第二通信设备可以通过多个传输连接进行数据帧的发送。
每个传输连接分别占用一个传输频段,多个传输连接占用多个传输频段，其中，传输频段可以是多个Wi-Fi工作频段，如2.4GHz、5.8GHz及6-7GHz等；也可以是传输频段占用的带宽的频率范围。可以在占用的带宽上分别形成的基本服务集(BSS，Basis Service Set)，譬如形成20MHz带宽的BSS。其中，各传输频段占用的带宽的频率范围可以属于同一个Wi-Fi工作频段，也可以属于不同Wi-Fi工作频段。示例性的，第一通信设备和第二通信设备之间建立有三个传输连接。三个传输连接可以分别属于2.4GHz、5.8GHz及6-7GHz三个Wi-Fi工作频段；三个传输连接也可以都属于2.4GHz Wi-Fi工作频段。三个传输连接可以采用相同的工作带宽，如均采用20MHz 的工作带宽。三个传输连接也可以采用不同的工作带宽，如分别采用20MHz、40MHz、80MHz的工作带宽等。
Wi-Fi通信设备在发送数据前必须对信道资源进行监听，如果信道资源是忙状态，则生成一个随机退避数，等待根据随机退避数确定的随机退避时长后，如果信道资源处于空闲状态，则可以采用信道资源开始发送数据。一个随机退避数可以对应于一个时隙时长，即一个随机退避数对应的随机退避时长为一个时隙的时长，譬如一个时隙时长为5微秒。
消息帧可以是Wi-Fi通信中的数据帧、管理帧等。针对于通过多个传输连接同步传输的多个数据帧，由于每个传输连接在接入通信信道时采用的随机退避数不同，使得每个传输连接发送数据帧的发送时间出现偏移。示例性的，如果数据帧发送端采用一个传输连接进行数据帧传输时，生成的随机退避数最大，即随机退避时长最长，则相对于多个传输连接中的其他传输连接，确定获取到发送机会的时间最晚，采用同步传输时，进而使得数据帧到达数据帧接收端的时间最晚。
这里，可以基于最大随机退避数，即以多个传输连接中数据帧到达数据帧接收端的最晚时间作为基准，调整每个传输连接中数据帧到达数据帧接收端的时间。
具体的可以以数据帧到达数据帧接收端的最晚时间作为基准，对每个传输连接中消息帧的帧长进行调整，使得每个处理连接中数据帧到达数据帧接收端的时间相同。示例性的，如果数据帧发送端采用一个传输连接进行数据帧传输时，生成的随机退避数最小，则该数据帧发送端采用同步传输传输的数据帧到达数据帧接收端的时间早于随机退避数最大的传输连接。这时，可以调整具有最小随机退避数的传输连接中数据帧的帧长，延长数据帧的传输时长，从延长数据帧到达数据帧接收端的时间。其中，随机退避数最大的传输连接的可以帧长调整量可以为0。
如此，基于最大随机退避数，即以多个传输连接中数据帧最晚到达数据帧接收端的时间点作为基准，通过调整每个传输连接中数据帧的帧长，实现调整数据帧的传输时长，进而实现每个传输连接中数据帧的到达数据帧接收端的时间的同步，减少多个传输连接数据帧到达数据帧接收端时间不一致的情况，提高同步传输的成功率，进而提升频谱的有效利用率。
在一个实施例中，步骤201可以包括：基于多传输连接的最大随机退避数及消息帧所在的传输连接的随机退避数，在消息帧的原始帧长上添加n个比特；其中，n为大于或等于0的整数。
这里，消息帧可以是数据帧以及在数据帧之前发送的RTS帧等。通过在消息帧的原始帧长上添加n个比特，从而延长消息帧的传输时长。通过调整添加比特的个数，可以使得各个传输连接中数据帧到大数据帧接收端的时间点与最大随机退避数的传输连接中数据帧到达数据帧接收端的时间点相同，实现各个传输连接中数据帧到大数据帧接收端的时间点一致，进而提高同步传输的成功率。n可以为0，表示传输连接的随机退避数为最大随机退避数，消息帧中不需要添加比特。
n个比特可以采用预定值，如此，数据帧接收端在接收到添加有n个比特的消息帧后，可以确定消息帧中添加的n个比特，并去除消息帧中添加的n个比特，并读取已去除n个比特后的消息帧数据内容。
在一个实施例中，n个比特的传输时长为：最大随机退避数与消息帧所在的传输连接的随机退避数之差，与时隙时长的乘积。
一个随机退避数对应的随机退避时长为一个时隙时长。因此，可以将根据每个传输连接的随机退避数与最大随机退避数的差值确定每个传输连接随机退避时长与最大随机退避时长的时间差。随机退避数与时隙时长相乘之积为随机退避时长。最大随机退避数与数据帧的传输连接的随机退避数之差乘以时隙时长之积，即为数据帧的传输连接随机退避时长与最大随 机退避数的传输连接随机退避时长之间的差值。
添加n个比特之前，如果各传输连接中传输的消息帧的长度以及消息帧的调制与编码方式(MCS，Modulation and Coding Scheme相同，则各传输连接中消息帧传输时长相同，传输连接的消息帧到达数据帧接收端的时间差即为传输连接随机退避时长之差。随机退避时长越短，消息帧到达数据帧接收端的时间越早；随机退避时长越长，消息帧到达数据帧接收端的时间越晚。每个传输连接可以根据自身随机退避时长与最大随机退避时长之差确定添加的比特数量。使得每个传输连接的消息帧到达数据帧接收端的时间点与最大随机退避数传输连接中消息帧到达数据帧接收端的时间点相同。可以通过添加比特，延长消息帧的传输时长，从而延长消息帧到达数据帧接收端的时间。其中，消息帧可以是数据帧，也可以为清除发送帧CTS(clear to send)。
示例性的，以第m个传输连接为例，第m个传输连接的随机退避数为i，多个传输连接中最大随机退避数为j，j大于i。第m个传输连接的随机退避时长与最大随机退避数的传输连接的随机退避时长之差为(j-i)*时隙时长，即第m个传输连接的消息帧会提前最大随机退避数的传输连接中的消息帧到达数据帧接收端。这里，可以在第m个传输连接的消息帧的原始帧长上添加n个比特，n可以根据随机退避时长之差确定，使第m个传输连接传输n个比特的传输时长等于随机退避时长之差。如此，使得添加n个比特后的第m个传输连接的消息帧和最大随机退避数的传输连接中的消息帧到达数据帧接收端的时间点相同。
可以根据每个传输连接随机退避时长与最大随机退避时长的时间差，确定每个传输连接的消息帧在原帧长上添加的比特数。使得添加的n个比特的传输时长等于每个传输连接随机退避时长与最大随机退避时长的时间差。其中，每个传输连接中消息帧在原帧长上添加的比特数可以相同也可 以不相同。
如此，通过添加n个比特延长消息帧的传输时长，补偿由于随机退避数不同产生的随机退避时长差异，进而提高同步传输的成功率。
在一个实施例中，在消息帧的原始帧长上添加n个比特可以包括：当传输连接传输的消息帧包括请求发送RTS帧时，在RTS帧或数据帧的原始帧长上添加n个比特。
为了抑制减小隐藏节点对数据帧传输的影响。Wi-Fi通信设备可以采用请求传送(RTS，Request to Send)/允许发送(CTS，Clear to Send)机制，数据帧发送端在发送数据帧之前，数据帧接收端发送RTS帧，等待数据帧接收端回应CTS帧后，数据帧发送端再开始发送数据帧。
当传输连接采用RTS/CTS机制进行数据帧传输时，传输连接传输RTS帧和数据帧。数据帧发送端可以在RTS帧中添加n个比特，如此可以延长RTS帧的传输时长，进而延后在RTS帧后续发送的数据帧到达数据帧接收端的时间点。通过，延长RTS帧的传输时长，补偿与最大随机退避数的传输连接随机退避时长之间的差值，可以使得每个传输连接中数据帧到达数据帧接收端的时间相等。RTS帧中添加n个比特后，RTS帧中的长度(Length)字段需要根据RTS帧添加n个比特后的长度进行更改。其中，长度字段位于RTS帧物理头的信号(SIG)子域。
当传输连接采用RTS/CTS机制进行数据帧传输时，数据帧发送端还可以在数据帧中添加n个比特，如此可以延长数据帧的传输时长，从而可以延后数据帧到达数据帧接收端的时间点，进而可以补偿与最大随机退避数的传输连接随机退避时长之间的差值，可以使得每个传输连接中数据帧到达数据帧接收端的时间相等。这里，可以在数据帧最后的添加n个比特。数据帧中添加n个比特后，数据帧中的长度(Length)字段需要根据数据帧添加n个比特后的长度进行更改。其中，长度字段位于数据帧物理头的信 号(SIG)子域。
n个比特可以采用预定值，如此，数据帧接收端在接收到添加有n个比特的RTS帧或数据帧后，可以确定消息帧中添加的n个比特，并去除RTS帧或数据帧中添加的n个比特，并读取已去除n个比特后的RTS帧或数据帧数据内容。
在一个实施例中，在消息帧的原始帧长上添加n个比特可以包括：当传输连接传输的消息帧不包括RTS帧时，在数据帧的原始帧长上添加n个比特。
传输连接还可以不采用RTS/CTS机制进行数据帧传输，即传输连接不用于传输RTS和CTS帧。这里，数据帧发送端可以在数据帧中添加n个比特，如此可以延长数据帧的传输时长，从而可以延后数据帧到达数据帧接收端的时间点，进而可以补偿与最大随机退避数的传输连接随机退避时长之间的差值，可以使得每个传输连接中数据帧到达数据帧接收端的时间相等。这里，可以在数据帧最后的添加n个比特。数据帧中添加n个比特后，数据帧中的长度(Length)字段需要根据数据帧添加n个比特后的长度进行更改。其中，长度字段位于数据帧物理头的信号(SIG)子域。
n个比特可以采用预定值，如此，数据帧接收端在接收到添加有n个比特的数据帧后，可以确定消息帧中添加的n个比特，并去除数据帧中添加的n个比特，并读取已去除n个比特后的数据帧数据内容。
如此，通过在RTS帧和数据帧等消息帧中添加预设内容的方式，加长消息帧的传输时长，使得每个传输连接的数据帧到达数据帧接收端的时间等于最大随机退避数对应传输连接中数据帧到达数据帧接收端的时间，提高同步传输的成功率。
在一个实施例中，如图4所示，数据传输方法还可以包括：
步骤302：根据n个比特的传输时长，确定消息帧的持续时间域指示的 传输连接占用信道资源的持续时长。
当传输连接采用RTS/CTS机制进行数据帧传输时，n个比特可以添加在RTS帧或数据帧中。数据帧发送端可以设置每个传输连接RTS帧的持续时长(duration)字段指示的持续时长为：数据帧传输时长+CTS传输时长+3*短帧间隔(SIFS，Short Interframe Space)时长+确认(ACK)帧时长+(最大随机退避数-当前传输连接随机退避数)*时隙时长(aslottime)。其中，数据帧传输时长可以是未添加n个比特的原数据帧传输时长，(最大随机退避数-当前传输连接随机退避数)*时隙时长(aslottime)为在RTS帧中n个比特的传输时长。这里，持续时长字段可以位于RTS帧的MAC帧头中。其中，当数据帧为连续数据帧时，每个连续数据帧的子数据帧之间有短帧间隔，持续时长字段指示的持续时长中短帧间隔相关的时长可以设置为：(子数据帧数量+3)*短帧间隔时长。
当传输连接采用RTS/CTS机制进行数据帧传输时，n个比特可以添加在RTS帧或数据帧中。数据帧接收端在接收到RTS后会向数据帧发送端发送CTS帧。如果接收到的RTS帧的持续时长字段指示的持续时长中包括n个比特的传输时长，则数据帧接收端可以设置CTS帧持续时长字段指示的持续时长为：原数据帧传输时长+CTS帧传输时长+2*短帧间隔时长+确认帧时长+(最大随机退避数-当前传输连接随机退避数)*时隙时长。其中，数据帧传输时长可以是未添加n个比特的原数据帧传输时长。持续时长字段可以位于CTS帧的MAC帧头中。其中，当数据帧为连续数据帧时，每个连续数据帧的子数据帧之间有短帧间隔，持续时长字段指示的持续时长中短帧间隔相关的时长可以设置为：(子数据帧数量+2)*短帧间隔时长。
当传输连接采用RTS/CTS机制进行数据帧传输时，n个比特可以添加在RTS帧或数据帧中。数据帧发送端可以设置每个传输连接数据帧的持续时长字段指示的持续时长为：数据帧传输时长+CTS帧传输时长+1*短帧间 隔时长+确认帧时长+(最大随机退避数-当前传输连接随机退避数)*时隙时长。其中，数据帧传输时长可以是未添加n个比特的原数据帧传输时长。其中，当数据帧为连续数据帧时，每个连续数据帧的子数据帧之间有短帧间隔，持续时长字段指示的持续时长中短帧间隔相关的时长可以设置为：(子数据帧数量+1)*短帧间隔时长。
当传输连接不采用RTS/CTS机制进行数据帧传输时，n个比特可以添加在数据帧中。数据帧发送端可以设置每个传输连接数据帧的持续时长字段指示的持续时长为：数据帧传输时长+CTS帧传输时长+1*短帧间隔时长+确认帧时长+(最大随机退避数-当前传输连接随机退避数)*时隙时长。其中，数据帧传输时长可以是未添加n个比特的原数据帧传输时长。其中，当数据帧为连续数据帧时，每个连续数据帧的子数据帧之间有短帧间隔，持续时长字段指示的持续时长中短帧间隔相关的时长可以设置为：(子数据帧数量+1)*短帧间隔时长其中如果数据帧为连续的数据帧，则SIFS*(数据帧个数+1)。
在一个实施例中，数据传输方法还可以包括：对在消息帧中添加的n个比特和n个比特之外的消息帧内容，采用相同的调制编码方式MCS。
在RTS帧的的原始帧长上添加n个比特时，RTS帧中添加的n个比特可以和n个比特之外的RTS帧内容采用相同的MSC，如此，可以提高RTS帧处理的效率。
在数据帧的的原始帧长上添加n个比特时，数据帧帧中添加的n个比特可以和n个比特之外的数据帧帧内容采用相同的MSC，如此，可以提高数据帧帧处理的效率。
当数据帧接收端接收RTS帧或数据帧时，可以采用一种MSC对应的解调解码方式接收RTS帧或数据帧，提高接收效率。
如图5所示，本示例性实施例提供一种于数据传输方法，可以应用于 无线通信的第二通信设备中，该方法包括：
步骤501：接收采用多传输连接同步方式传输的多个消息帧；
其中，各传输连接传输的消息帧的帧长，是：当存在至少两个传输连接的随机退避数不同时基于多传输连接的最大随机退避数确定的。
无线通信可以是IEEE802.11be等标准的Wi-Fi通信；这里，第一无线通信设备可以是Wi-Fi通信技术中的数据帧发送端，第二无线通信设备可以是Wi-Fi通信技术中的数据帧接收端。第一通信设备和第二通信设备可以通过多个传输连接进行数据帧的发送。
每个传输连接分别占用一个传输频段,多个传输连接占用多个传输频段，其中，传输频段可以是多个Wi-Fi工作频段，如2.4GHz、5.8GHz及6-7GHz等；也可以是传输频段占用的带宽的频率范围。可以在占用的带宽上分别形成的基本服务集(BSS，Basis Service Set)，譬如形成20MHz带宽的BSS。其中，各传输频段占用的带宽的频率范围可以属于同一个Wi-Fi工作频段，也可以属于不同Wi-Fi工作频段。示例性的，第一通信设备和第二通信设备之间建立有三个传输连接。三个传输连接可以分别属于2.4GHz、5.8GHz及6-7GHz三个Wi-Fi工作频段；三个传输连接也可以都属于2.4GHz Wi-Fi工作频段。三个传输连接可以采用相同的工作带宽，如均采用20MHz的工作带宽。三个传输连接也可以采用不同的工作带宽，如分别采用20MHz、40MHz、80MHz的工作带宽等。
Wi-Fi通信设备在发送数据前必须对信道资源进行监听，如果信道资源是忙状态，则生成一个随机退避数，等待根据随机退避数确定的随机退避时长后，如果信道资源处于空闲状态，则可以采用信道资源开始发送数据。一个随机退避数可以对应于一个时隙时长，即一个随机退避数对应的随机退避时长为一个时隙的时长，譬如一个时隙时长为5微秒。
消息帧可以是Wi-Fi通信中的数据帧、管理帧等。针对于通过多个传输 连接同步传输的多个数据帧，由于每个传输连接在接入通信信道时采用的随机退避数不同，使得每个传输连接发送数据帧的发送时间出现偏移。示例性的，如果数据帧发送端采用一个传输连接进行数据帧传输时，生成的随机退避数最大，即随机退避时长最长，则相对于多个传输连接中的其他传输连接，确定获取到发送机会的时间最晚，采用同步传输时，进而使得数据帧到达数据帧接收端的时间最晚。
这里，可以基于最大随机退避数，即以多个传输连接中数据帧到达数据帧接收端的最晚时间作为基准，调整每个传输连接中数据帧到达数据帧接收端的时间。
具体的可以以数据帧到达数据帧接收端的最晚时间作为基准，对每个传输连接中消息帧的帧长进行调整，使得每个处理连接中数据帧到达数据帧接收端的时间相同。示例性的，如果数据帧发送端采用一个传输连接进行数据帧传输时，生成的随机退避数最小，则该数据帧发送端采用同步传输传输的数据帧到达数据帧接收端的时间早于随机退避数最大的传输连接，这时，可以调整具有最小随机退避数的传输连接中数据帧的帧长，延长数据帧的传输时长，从延长数据帧到达数据帧接收端的时间。其中，随机退避数最大的传输连接的可以帧长调整量可以为0。
如此，基于最大随机退避数，即以多个传输连接中数据帧最晚到达数据帧接收端的时间点作为基准，通过调整每个传输连接中数据帧的帧长，实现调整数据帧的传输时长，进而实现每个传输连接中数据帧的到达数据帧接收端的时间的同步，减少多个传输连接数据帧到达数据帧接收端时间不一致的情况，提高同步传输的成功率，进而提升频谱的有效利用率。
在一个实施例中，数据传输方法还可以包括：
当接收到的消息帧包括请求发送RTS帧时，去除RTS帧中添加的n个比特，并读取已去除n个比特后的RTS帧数据内容，或者，去除消息帧所 包含数据帧中添加的n个比特，并读取已去除n个比特后的数据帧数据内容；其中，n为大于或等于0的整数。
为了避免减小隐藏节点对数据帧传输的影响。Wi-Fi通信设备可以采用请求传送(RTS，Request to Send)/允许发送(CTS，Clear to Send)机制，数据帧发送端在发送数据帧之前，数据帧接收端发送RTS帧，等待数据帧接收端回应CTS帧后，数据帧发送端再开始发送数据帧。
当传输连接采用RTS/CTS机制进行数据帧传输时，传输连接传输RTS帧和数据帧。数据帧发送端可以在RTS帧中添加n个比特，如此可以延长RTS帧的传输时长，进而延后在RTS帧后续发送的数据帧到达数据帧接收端的时间点。通过，延长RTS帧的传输时长，补偿与最大随机退避数的传输连接随机退避时长之间的差值，可以使得每个传输连接中数据帧到达数据帧接收端的时间相等。RTS帧中添加n个比特后，RTS帧中的长度(Length)字段需要根据RTS帧添加n个比特后的长度进行更改。其中，长度字段位于RTS帧物理头的信号(SIG)子域。
当传输连接采用RTS/CTS机制进行数据帧传输时，数据帧发送端还可以在数据帧中添加n个比特，如此可以延长数据帧的传输时长，从而可以延后数据帧到达数据帧接收端的时间点，进而可以补偿与最大随机退避数的传输连接随机退避时长之间的差值，可以使得每个传输连接中数据帧到达数据帧接收端的时间相等。这里，可以在数据帧最后的添加n个比特。数据帧中添加n个比特后，数据帧中的长度(Length)字段需要根据数据帧添加n个比特后的长度进行更改。其中，长度字段位于数据帧物理头的信号(SIG)子域。
n个比特可以采用预定值，如此，数据帧接收端在接收到添加有n个比特的RTS帧或数据帧后，可以确定消息帧中添加的n个比特，并去除RTS帧或数据帧中添加的n个比特，并读取已去除n个比特后的RTS帧或数据 帧数据内容。
在一个实施例中，数据传输方法还可以包括：
根据n个比特的传输时长，确定CTS帧的持续时间域指示的传输连接占用信道资源的持续时长；发送CTS帧。
当传输连接采用RTS/CTS机制进行数据帧传输时，n个比特可以添加在RTS帧或数据帧中。数据帧接收端在接收到RTS后会向数据帧发送端发送CTS帧。如果接收到的RTS帧的持续时长字段指示的持续时长中包括n个比特的传输时长，则数据帧接收端可以设置CTS帧持续时长字段指示的持续时长为：原数据帧传输时长+CTS帧传输时长+2*短帧间隔时长+确认帧时长+(最大随机退避数-当前传输连接随机退避数)*时隙时长。其中，数据帧传输时长可以是未添加n个比特的原数据帧传输时长。持续时长字段可以位于CTS帧的MAC帧头中。其中，当数据帧为连续数据帧时，每个连续数据帧的子数据帧之间有短帧间隔，持续时长字段指示的持续时长中短帧间隔相关的时长可以设置为：(子数据帧数量+2)*短帧间隔时长。
在一个实施例中，数据传输方法还可以包括：
当接收的消息帧不包括RTS帧时，去除数据帧中添加的n个比特，并读取已去除n个比特后的数据帧数据内容，其中，n为大于或等于0的整数。
传输连接还可以不采用RTS/CTS机制进行数据帧传输，即传输连接不用于传输RTS和CTS帧。这里，数据帧发送端可以在数据帧中添加n个比特，如此可以延长数据帧的传输时长，从而可以延后数据帧到达数据帧接收端的时间点，进而可以补偿与最大随机退避数的传输连接随机退避时长之间的差值，可以使得每个传输连接中数据帧到达数据帧接收端的时间相等。这里，可以在数据帧最后的添加n个比特。数据帧中添加n个比特后，数据帧中的长度(Length)字段需要根据数据帧添加n个比特后的长度进行更改。其中，长度字段位于数据帧物理头的信号(SIG)子域。
n个比特可以采用预定值，如此，数据帧接收端在接收到添加有n个比特的数据帧后，可以确定消息帧中添加的n个比特，并去除数据帧中添加的n个比特，并读取已去除n个比特后的数据帧数据内容。
如此，通过在RTS帧和数据帧等消息帧中添加预设内容的方式，加长消息帧的传输时长，使得每个传输连接的数据帧到达数据帧接收端的时间等于最大随机退避数对应传输连接中数据帧到达数据帧接收端的时间，提高同步传输的成功率。
以下结合上述任意实施例提供一个具体示例：
如果多传输连接中的每个传输连接下所产生的随机数不完全相同，为了满足同步传输的需求，可采用如下方法：
1：消息帧进行填充。
可在RTS中添加比特位，或发送的数据帧中添加比特位。
由于RTS采用的MCS与数据帧采用的MCS方式不一样，数据帧频谱的利用效率，可在数据帧中填充比特位，可以在数据帧的尾部填充比特位；
添加比特位的长度可以根据添加的比特位的传输时长确定，添加的比特位的传输时长为：(max(link1 backoff，link2 backoff，……)-传输连接的随机退避数)*时隙时长(aslottime)，其中，max(link1 backoff，link2 backoff，……)表示取各传输连接的随机退避数中的最大随机退避数。
2：持续时长(duration)字段
a：为了避免隐藏节点的存在，采用RTS/CTS机制进行数据传输。
各传输连接按照自身随机退避数进行计数，数据帧发送端在各传输连接下根据RTS帧的帧长设置RTS帧的物理头中信号(SIG)子域的长度(length)字段，并设置MAC帧头中的持续时长(duration)字段指示的持续时长为：数据帧长度+CTS长度+3*SIFS+ACK+(max(link1 backoff，link2 backoff，……)-自身的随机退避数)*(时隙时长)aslottime。其中，数据 帧传输时长可以是未添加比特位的原数据帧传输时长。当数据帧为连续数据帧时，持续时长字段指示的持续时长中短帧间隔相关的时长可以设置为：(连续数据帧子数据帧数量+3)*短帧间隔时长。
数据帧接收端可以设置CTS帧MAC帧头中的持续时长(duration)字段指示的持续时长为：数据帧长度+2*SIFS+ACK+(max(link1 backoff，link2 backoff，……)-自身的随机退避数)*时隙时长。其中，数据帧传输时长可以是未添加比特位的原数据帧传输时长。
数据帧发送端可以设置数据帧的MAC帧头中的持续时长(duration)字段指示的持续时长为：数据帧长度+1*SIFS+ACK+(max(link1 backoff，link2 backoff，……)-自身的随机退避数)*时隙时长。其中，数据帧传输时长可以是未添加比特位的原数据帧传输时长。
b：不采用RTS/CTS机制进行数据传输，传输连接直接发送数据帧。
直接发送数据帧，退避计数方法和上述步骤A中一样，在每个传输连接下数据帧的物理帧头物理头SIG子域length字段及MAC帧头中的duration字段的长度为：数据帧长度+1*SIFS+ACK+(max(link1 backoff，link2 backoff，……)-自身的随机退避数)*时隙时长。其中，数据帧传输时长可以是未添加比特位的原数据帧传输时长。
当数据帧为连续数据帧时，持续时长字段指示的持续时长中短帧间隔相关的时长可以设置为：(连续数据帧子数据帧数量+3)*短帧间隔时长。
本发明实施例还提供了一种数据传输装置，应用于无线通信的第一通信设备，图6为本发明实施例提供的数据传输装置100的组成结构示意图；如图6所示，装置100包括：第一确定模块110，其中，
第一确定模块110，配置为针对多传输连接的同步传输，当存在至少两个传输连接的随机退避数不同时，基于多传输连接的最大随机退避数，确定各传输连接传输的消息帧的帧长。
在一个实施例中，第一确定模块110，包括：
确定子模块111，配置为基于多传输连接的最大随机退避数及消息帧所在的传输连接的随机退避数，在消息帧的原始帧长上添加n个比特；
其中，n为大于或等于0的整数。
在一个实施例中，n个比特的传输时长为：最大随机退避数与消息帧所在的传输连接的随机退避数之差，与时隙时长的乘积。
在一个实施例中，确定子模块111，包括：
第一确定单元1111，配置为当传输连接传输的消息帧包括请求发送RTS帧时，在RTS帧或数据帧的原始帧长上添加n个比特。
在一个实施例中，确定子模块111，包括：
第二确定单元1112，配置为当传输连接传输的消息帧不包括RTS帧时，在数据帧的原始帧长上添加n个比特。
在一个实施例中，装置100还包括：
第二确定模块120，配置为根据n个比特的传输时长，确定消息帧的持续时间域指示的传输连接占用信道资源的持续时长。
在一个实施例中，装置100还包括：
编码模块130，配置为对在消息帧中添加的n个比特和n个比特之外的消息帧内容，采用相同的调制编码方式MCS。
本发明实施例还提供了一种数据传输装置，应用于无线通信的第二通信设备，图7为本发明实施例提供的数据传输装置200的组成结构示意图；如图7所示，装置200包括：接收模块210，其中，
接收模块210，配置为接收采用多传输连接同步方式传输的多个消息帧；
其中，各传输连接传输的消息帧的帧长，是：当存在至少两个传输连接的随机退避数不同时基于多传输连接的最大随机退避数确定的。
在一个实施例中，装置200还包括：
第一处理模块220，配置为当接收到的消息帧包括请求发送RTS帧时，
去除RTS帧中添加的n个比特，并读取已去除n个比特后的RTS帧数据内容，
或者，
去除消息帧所包含数据帧中添加的n个比特，并读取已去除n个比特后的数据帧数据内容；
其中，n为大于或等于0的整数。
在一个实施例中，装置200还包括：
第三确定模块230，配置为根据n个比特的传输时长，确定CTS帧的持续时间域指示的传输连接占用信道资源的持续时长
发送CTS帧。
在一个实施例中，装置200还包括：
第二处理模块240，配置为当接收的消息帧不包括RTS帧时，
去除数据帧中添加的n个比特，并读取已去除n个比特后的数据帧数据内容，其中，n为大于或等于0的整数。
在示例性实施例中，第一确定模块110、第二确定模块120、编码模块130、接收模块210、第一处理模块220、第三确定模块230和第二处理模块240等可以被一个或多个中央处理器(CPU，Central Processing Unit)、图形处理器(GPU，Graphics Processing Unit)、基带处理器(BP，baseband processor)、应用专用集成电路(ASIC，Application Specific Integrated Circuit)、DSP、可编程逻辑器件(PLD，Programmable Logic Device)、复杂可编程逻辑器件(CPLD，Complex Programmable Logic Device)、现场可编程门阵列(FPGA，Field-Programmable Gate Array)、通用处理器、控制器、微控制器(MCU，Micro Controller Unit)、微处理器(Microprocessor)、 或其他电子元件实现，用于执行前述方法。
图8是根据一示例性实施例示出的一种用于数据传输或传输块配置参数确定的装置3000的框图。例如，装置3000可以是移动电话，计算机，数字广播终端，消息收发设备，游戏控制台，平板设备，医疗设备，健身设备，个人数字助理等。
参照图8，装置3000可以包括以下一个或多个组件：处理组件3002，存储器3004，电源组件3006，多媒体组件3008，音频组件3010，输入/输出(I/O)的接口3012，传感器组件3014，以及通信组件3016。
处理组件3002通常控制装置3000的整体操作，诸如与显示，电话呼叫，数据通信，相机操作和记录操作相关联的操作。处理组件3002可以包括一个或多个处理器3020来执行指令，以完成上述的方法的全部或部分步骤。此外，处理组件3002可以包括一个或多个模块，便于处理组件3002和其他组件之间的交互。例如，处理组件3002可以包括多媒体模块，以方便多媒体组件3008和处理组件3002之间的交互。
存储器3004被配置为存储各种类型的数据以支持在设备3000的操作。这些数据的示例包括用于在装置3000上操作的任何应用程序或方法的指令，联系人数据，电话簿数据，消息，图片，视频等。存储器3004可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，如静态随机存取存储器(SRAM)，电可擦除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，可编程只读存储器(PROM)，只读存储器(ROM)，磁存储器，快闪存储器，磁盘或光盘。
电源组件3006为装置3000的各种组件提供电力。电源组件3006可以包括电源管理系统，一个或多个电源，及其他与为装置3000生成、管理和分配电力相关联的组件。
多媒体组件3008包括在装置3000和用户之间的提供一个输出接口的 屏幕。在一些实施例中，屏幕可以包括液晶显示器(LCD)和触摸面板(TP)。如果屏幕包括触摸面板，屏幕可以被实现为触摸屏，以接收来自用户的输入信号。触摸面板包括一个或多个触摸传感器以感测触摸、滑动和触摸面板上的手势。触摸传感器可以不仅感测触摸或滑动动作的边界，而且还检测与触摸或滑动操作相关的持续时间和压力。在一些实施例中，多媒体组件3008包括一个前置摄像头和/或后置摄像头。当设备3000处于操作模式，如拍摄模式或视频模式时，前置摄像头和/或后置摄像头可以接收外部的多媒体数据。每个前置摄像头和后置摄像头可以是一个固定的光学透镜系统或具有焦距和光学变焦能力。
音频组件3010被配置为输出和/或输入音频信号。例如，音频组件3010包括一个麦克风(MIC)，当装置3000处于操作模式，如呼叫模式、记录模式和语音识别模式时，麦克风被配置为接收外部音频信号。所接收的音频信号可以被进一步存储在存储器3004或经由通信组件3016发送。在一些实施例中，音频组件3010还包括一个扬声器，用于输出音频信号。
I/O接口3012为处理组件3002和外围接口模块之间提供接口，上述外围接口模块可以是键盘，点击轮，按钮等。这些按钮可包括但不限于：主页按钮、音量按钮、启动按钮和锁定按钮。
传感器组件3014包括一个或多个传感器，用于为装置3000提供各个方面的状态评估。例如，传感器组件3014可以检测到设备3000的打开/关闭状态，组件的相对定位，例如组件为装置3000的显示器和小键盘，传感器组件3014还可以检测装置3000或装置3000一个组件的位置改变，用户与装置3000接触的存在或不存在，装置3000方位或加速/减速和装置3000的温度变化。传感器组件3014可以包括接近传感器，被配置用来在没有任何的物理接触时检测附近物体的存在。传感器组件3014还可以包括光传感器，如CMOS或CCD图像传感器，用于在成像应用中使用。在一些实施例 中，该传感器组件3014还可以包括加速度传感器，陀螺仪传感器，磁传感器，压力传感器或温度传感器。
通信组件3016被配置为便于装置3000和其他设备之间有线或无线方式的通信。装置3000可以接入基于通信标准的无线网络，如Wi-Fi，2G或3G，或它们的组合。在一个示例性实施例中，通信组件3016经由广播信道接收来自外部广播管理系统的广播信号或广播相关信息。在一个示例性实施例中，通信组件3016还包括近场通信(NFC)模块，以促进短程通信。例如，在NFC模块可基于射频识别(RFID)技术，红外数据协会(IrDA)技术，超宽带(UWB)技术，蓝牙(BT)技术和其他技术来实现。
在示例性实施例中，装置3000可以被一个或多个应用专用集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理设备(DSPD)、可编程逻辑器件(PLD)、现场可编程门阵列(FPGA)、控制器、微控制器、微处理器或其他电子元件实现，用于执行上述方法。
在示例性实施例中，还提供了一种包括指令的非临时性计算机可读存储介质，例如包括指令的存储器3004，上述指令可由装置3000的处理器3020执行以完成上述方法。例如，非临时性计算机可读存储介质可以是ROM、随机存取存储器(RAM)、CD-ROM、磁带、软盘和光数据存储设备等。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本发明实施例的其它实施方案。本申请旨在涵盖本发明实施例的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本发明实施例的一般性原理并包括本公开实施例未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本发明实施例的真正范围和精神由下面的权利要求指出。
应当理解的是，本发明实施例并不局限于上面已经描述并在附图中示 出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本发明实施例的范围仅由所附的权利要求来限制。

Claims (23)

  1. 一种数据传输方法，其中，应用于第一通信设备，所述方法包括：
    针对多传输连接的同步传输，当存在至少两个所述传输连接的随机退避数不同时，基于所述多传输连接的最大随机退避数，确定各所述传输连接传输的消息帧的帧长。
  2. 根据权利要求1所述的方法，其中，所述基于所述多传输连接的最大随机退避数，确定各所述传输连接传输的消息帧的帧长，包括：
    基于所述多传输连接的最大随机退避数及所述消息帧所在的所述传输连接的随机退避数，在所述消息帧的原始帧长上添加n个比特；
    其中，所述n为大于或等于0的整数。
  3. 根据权利要求2所述的方法，其中，所述n个比特的传输时长为：所述最大随机退避数与所述消息帧所在的所述传输连接的随机退避数之差，与时隙时长的乘积。
  4. 根据权利要求2所述的方法，其中，所述在所述消息帧的原始帧长上添加n个比特，包括：
    当所述传输连接传输的所述消息帧包括请求发送RTS帧时，在所述RTS帧或数据帧的原始帧长上添加所述n个比特。
  5. 根据权利要求2所述的方法，其中，所述在所述消息帧的原始帧长上添加n个比特，包括：
    当所述传输连接传输的所述消息帧不包括RTS帧时，在数据帧的原始帧长上添加所述n个比特。
  6. 根据权利要求2至5任一项所述的方法，其中，所述方法还包括：
    根据所述n个比特的传输时长，确定所述消息帧的持续时间域指示的所述传输连接占用信道资源的持续时长。
  7. 根据权利要求2至5任一项所述的方法，其中，所述方法还包括：
    对在所述消息帧中添加的所述n个比特和所述n个比特之外的所述消息帧内容，采用相同的调制编码方式MCS。
  8. 一种数据传输方法，其中，应用于第二通信设备，所述方法包括：
    接收采用多传输连接同步方式传输的多个消息帧；
    其中，各所述传输连接传输的所述消息帧的帧长，是：当存在至少两个所述传输连接的随机退避数不同时基于所述多传输连接的最大随机退避数确定的。
  9. 根据权利要求8所述的方法，其中，所述方法还包括：
    当接收到的所述消息帧包括请求发送RTS帧时，
    去除所述RTS帧中添加的n个比特，并读取去除所述添加的所述n个比特后的所述RTS帧数据内容，
    或者，
    去除所述消息帧所包含数据帧中添加的所述n个比特，并读取去除所述添加的所述n个比特后的所述数据帧数据内容；
    其中，所述n为大于或等于0的整数。
  10. 根据权利要求9所述的方法，其中，所述方法还包括：
    根据所述n个比特的传输时长，确定CTS帧的持续时间域指示的所述传输连接占用信道资源的持续时长；
    发送所述CTS帧。
  11. 根据权利要求8所述的方法，其中，所述方法还包括：
    当接收的所述消息帧不包括RTS帧时，
    去除数据帧中添加的n个比特，并读取去除所述添加的所述n个比特后的所述数据帧数据内容，其中，n为大于或等于0的整数。
  12. 一种数据传输装置，其中，应用于第一通信设备，所述装置包括：第一确定模块，其中，
    所述第一确定模块，配置为针对多传输连接的同步传输，当存在至少两个所述传输连接的随机退避数不同时，基于所述多传输连接的最大随机退避数，确定各所述传输连接传输的消息帧的帧长。
  13. 根据权利要求12所述的装置，其中，所述第一确定模块，包括：
    确定子模块，配置为基于所述多传输连接的最大随机退避数及所述消息帧所在的所述传输连接的随机退避数，在所述消息帧的原始帧长上添加n个比特；
    其中，所述n为大于或等于0的整数。
  14. 根据权利要求13所述的装置，其中，所述n个比特的传输时长为：所述最大随机退避数与所述消息帧所在的所述传输连接的随机退避数之差，与时隙时长的乘积。
  15. 根据权利要求13所述的装置，其中，所述确定子模块，包括：
    第一确定单元，配置为当所述传输连接传输的所述消息帧包括请求发送RTS帧时，在所述RTS帧或数据帧的原始帧长上添加所述n个比特。
  16. 根据权利要求13所述的装置，其中，所述确定子模块，包括：
    第二确定单元，配置为当所述传输连接传输的所述消息帧不包括RTS帧时，在数据帧的原始帧长上添加所述n个比特。
  17. 根据权利要求13至16任一项所述的装置，其中，所述装置还包括：
    第二确定模块，配置为根据所述n个比特的传输时长，确定所述消息帧的持续时间域指示的所述传输连接占用信道资源的持续时长。
  18. 根据权利要求13至16任一项所述的装置，其中，所述装置还包括：
    编码模块，配置为对在所述消息帧中添加的所述n个比特和所述n个比特之外的所述消息帧内容，采用相同的调制编码方式MCS。
  19. 一种数据传输装置，其中，应用于第二通信设备，所述装置包括：接收模块，其中，
    所述接收模块，配置为接收采用多传输连接同步方式传输的多个消息帧；
    其中，各所述传输连接传输的所述消息帧的帧长，是：当存在至少两个所述传输连接的随机退避数不同时基于所述多传输连接的最大随机退避数确定的。
  20. 根据权利要求19所述的装置，其中，所述装置还包括：
    第一处理模块，配置为当接收到的所述消息帧包括请求发送RTS帧时，
    去除所述RTS帧中添加的n个比特，并读取去除所述添加的所述n个比特后的所述RTS帧数据内容，
    或者，
    去除所述消息帧所包含数据帧中添加的所述n个比特，并读取去除所述添加的所述n个比特后的所述数据帧数据内容；
    其中，所述n为大于或等于0的整数。
  21. 根据权利要求20所述的装置，其中，所述装置还包括：
    第三确定模块，配置为根据所述n个比特的传输时长，确定CTS帧的持续时间域指示的所述传输连接占用信道资源的持续时长
    发送所述CTS帧。
  22. 根据权利要求19所述的装置，其中，所述装置还包括：
    第二处理模块，配置为当接收的所述消息帧不包括RTS帧时，
    去除数据帧中添加的n个比特，并读取去除所述添加的所述n个比特后的所述数据帧数据内容，其中，n为大于或等于0的整数。
  23. 一种通信设备，包括处理器、收发器、存储器及存储在存储器上并能够有所述处理器运行的可执行程序，其中，所述处理器运行所述可执 行程序时执行如权利要求1至7或8至11任一项所述数据传输方法的步骤。
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