WO2021139709A1 - 一种设备到设备d2d传输方法及通信装置 - Google Patents

一种设备到设备d2d传输方法及通信装置 Download PDF

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Publication number
WO2021139709A1
WO2021139709A1 PCT/CN2021/070597 CN2021070597W WO2021139709A1 WO 2021139709 A1 WO2021139709 A1 WO 2021139709A1 CN 2021070597 W CN2021070597 W CN 2021070597W WO 2021139709 A1 WO2021139709 A1 WO 2021139709A1
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WIPO (PCT)
Prior art keywords
transmission
information
station
frame
demand
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PCT/CN2021/070597
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English (en)
French (fr)
Inventor
杨懋
郭宇宸
李云波
李波
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华为技术有限公司
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Publication of WO2021139709A1 publication Critical patent/WO2021139709A1/zh
Priority to US17/857,800 priority Critical patent/US20220346072A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0278—Traffic management, e.g. flow control or congestion control using buffer status reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • This application relates to the field of communications, and in particular to a device-to-device D2D transmission method and communication device.
  • the Institute of Electrical and Electronic Engineers (IEEE) organization introduced the uplink transmission of orthogonal frequency division multiple access (OFDMA) in the wireless local area network (WLAN) standard 802.11ax .
  • the uplink transmission process based on OFDMA in the WLAN is: an access point (access point, AP) sends a trigger frame (TF) after competing for channel resources.
  • the trigger frame indicates a number of resource units (resource units, RUs), which are used to allocate to designated non-access point stations (non-access point stations, non-AP STAs) for uplink transmission or uplink random access.
  • the non-AP STA After the non-AP STA receives the trigger frame, it transmits uplink data in OFDMA on the corresponding RU.
  • the AP receives the uplink data, it sends a block ACK (BA) to all non-AP STAs that transmit uplink data.
  • BA block ACK
  • D2D transmission refers to a transmission method in which two non-AP STAs directly transmit data without transiting through the AP. How to implement D2D transmission in a WiFi system is a problem that needs to be solved urgently at present.
  • This application provides a device-to-device D2D transmission method and communication device, which can implement D2D transmission in a WiFi system.
  • the present application provides a D2D transmission method.
  • the method includes: a station receives a trigger frame sent by an access point, the trigger frame includes a user information field; the user information field includes the site’s identity, resource allocation information, and the first Indication information and second indication information, the first indication information is used to indicate that the resource unit indicated by the resource allocation information is used for device-to-device D2D transmission, and the second indication information is used to indicate that the station is the sender or receiver of D2D transmission ;
  • the station performs D2D transmission on the resource unit indicated by the resource allocation information. Based on the method described in the first aspect, D2D transmission can be realized in a WiFi system.
  • the user information field includes 48 bits. Based on this possible implementation, it is beneficial to improve system compatibility. This possible implementation manner can also be applied to the following second aspect, which will not be repeated in the second aspect.
  • the first indication information is in the 40th bit of the user information field.
  • the reserved bits of the 802.11ax standard can be modified to carry the first indication information, which can avoid adding new bits in the user information field to carry the first indication information, which is conducive to saving users The bits of the information field.
  • This possible implementation manner can also be applied to the following second aspect, which will not be repeated in the second aspect.
  • the second indication information is in the 46th bit of the user information field.
  • the reserved bits of the 802.11ax standard can be modified to carry the second indication information, which can avoid adding new bits in the user information field to carry the second indication information, which is conducive to saving users The bits of the information field.
  • This possible implementation manner can also be applied to the following second aspect, which will not be repeated in the second aspect.
  • the present application provides a D2D transmission method.
  • the method includes: an access point generates a trigger frame, the trigger frame includes a user information field; the user information field includes the site identifier, resource allocation information, first indication information, and Second indication information, the first indication information is used to indicate that the resource unit indicated by the resource allocation information is used for device-to-device D2D transmission, and the second indication information is used to indicate that the station is the sender or receiver of D2D transmission; access; Click to send the trigger frame.
  • D2D transmission can be realized in a WiFi system.
  • the present application provides a D2D transmission method.
  • the method includes: a first station receives a trigger frame sent by an access point, the trigger frame includes a user information field, and the user information field includes an identifier and resource of the first station Allocation information, first indication information, and first identification information, the first station is the sender of D2D transmission, and the first indication information is used to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission; the first identification The information is the identification of the second station, the second station is the receiver of D2D transmission, or the first identification information is the link identification of D2D transmission; the first station sends the first station to the first station on the D2D transmission resource unit indicated by the resource allocation information.
  • the second site sends data.
  • the first identification information is the link identification of the D2D transmission
  • the first station receives the trigger frame, based on the link identification of the D2D transmission, it is determined that the second station is the receiver of the D2D transmission.
  • the first station determines that the second station is the receiver of the D2D transmission, it sends data to the second station on the resource unit indicated by the resource allocation information.
  • D2D transmission can be realized in a WiFi system.
  • the first identification information may be a partial identification or a complete identification of the second site.
  • the user information field of the trigger frame includes 48 bits. Based on this possible implementation, it is beneficial to improve system compatibility. This possible implementation manner can also be applied to the following fourth and fifth aspects, and details are not repeated in the fourth and fifth aspects.
  • the first indication information is in the 40th bit (B39) of the user information field; or the first indication information is in the 12th bit (B11) of the user information field; or the first indication information is in the user information field.
  • the 46th bit (B45) of the information field that is, the 6th bit (B5) of the trigger-dependent user information field (trigger dependent user info) in the first user information field where the first indication information is located.
  • the first identification information is in the 33rd bit (B32) to the 39th bit (B38) of the user information field.
  • the UL Target RSSI subfield (B32-B38) of the user information field can be multiplexed to carry the first identification information, which is beneficial to saving bits in the user information field.
  • the present application provides a D2D transmission method.
  • the method includes: a second station receives a trigger frame sent by an access point, the trigger frame includes a user information field, and the user information field includes the identity and resource of the first station Allocation information, first indication information, and first identification information, the first station is the sender of D2D transmission, and the first indication information is used to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission; the first identification The information is the identifier of the second station, which is the receiver of D2D transmission, or, the first identification information is the link identifier of D2D transmission; the first station receives the first station in the D2D transmission resource unit allocated by the resource allocation information.
  • the data sent by the site includes: a second station receives a trigger frame sent by an access point, the trigger frame includes a user information field, and the user information field includes the identity and resource of the first station Allocation information, first indication information, and first identification information, the first station is the sender of D2D transmission, and
  • the first identification information is the link identification of the D2D transmission
  • the second station receives the trigger frame, based on the link identification of the D2D transmission, it is determined that the second station is the receiver of the D2D transmission. After determining that the second station is the receiver of the D2D transmission, the second station receives the data sent by the first station on the resource unit indicated by the resource allocation information. Based on the method described in the fourth aspect, D2D transmission can be realized in a WiFi system.
  • the present application provides a D2D transmission method, the method includes: an access point generates a trigger frame, the trigger frame includes a user information field, the user information field includes the identification of the first station, resource allocation information, the first Indication information and first identification information, the first station is the sender of D2D transmission, the first indication information is used to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission; the first identification information is the second station The second station is the receiver of the D2D transmission, or the first identification information is the link identifier of the D2D transmission; the access point sends the trigger frame.
  • D2D transmission can be realized in a WiFi system.
  • the present application provides a D2D transmission method, the method includes: a first station receives a trigger frame sent by an access point, the user information field of the trigger frame includes a link identifier for D2D transmission and resource allocation for D2D transmission Information; the first station determines that the first station is the sender of the D2D transmission link based on the link identifier of the D2D transmission, and determines that the second station is the receiver of the D2D transmission link; the first station is transmitting in the D2D indicated by the resource allocation information
  • the resource unit sends data to the second site.
  • D2D transmission can be realized in a WiFi system.
  • the user information field of the trigger frame includes 48 bits. Based on this possible implementation, it is beneficial to improve system compatibility. This possible implementation manner can also be applied to the following seventh and eighth aspects, and details are not repeated in the seventh and eighth aspects.
  • the link identifier of the D2D transmission is in the first bit (B0) to the twelfth bit (B11) of the user information field.
  • the AID12 subfield (B0-B11) in the user field can be reused to carry the link identifier of the D2D transmission, which is beneficial to saving bits in the user information field.
  • This possible implementation manner can also be applied to the following seventh and eighth aspects, and details are not repeated in the seventh and eighth aspects.
  • any one of the link identifiers transmitted by D2D and the access point is associated
  • the identifiers of the sites are different, which helps to prevent the site from interpreting the link identifier of the D2D transmission as the identifier of the site.
  • the user information field further includes first indication information, where the first indication information is used to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission. Based on this possible implementation manner, it is advantageous for the station to distinguish whether the resource unit indicated in the user information field is used for D2D transmission or uplink transmission. This possible implementation manner can also be applied to the following seventh and eighth aspects, and details are not repeated in the seventh and eighth aspects.
  • the first indication information may be in the first bit (B0) to the twelfth bit (B11) of the user information field.
  • the AID12 subfield (B0-B11) in the user field can be multiplexed to carry the first indication information, which is beneficial to saving bits in the user information field.
  • This possible implementation manner can also be applied to the following seventh and eighth aspects, and details are not repeated in the seventh and eighth aspects.
  • the link identifier of the D2D transmission is in the 33rd bit of the user information field.
  • Bit (B32) ⁇ 39th bit (B38), or D2D transmission link identifier is in the 33rd bit (B32) ⁇ 40th bit (B39) of the user information field.
  • the UL Target RSSI subfield (B32-B38) of the user information field can be reused to carry the link identifier of the D2D transmission, which is beneficial to saving bits in the user information field.
  • This possible implementation manner can also be applied to the following seventh and eighth aspects, and details are not repeated in the seventh and eighth aspects.
  • the first indication information when used to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission, the first indication information is located in the AID11 subfield (B0-B10) or the AID12 subfield (B0- B11), which can be a special value, for example, can be any of 2008-2044 and 2047-4094 to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission.
  • the present application provides a D2D transmission method, the method includes: a second station receives a trigger frame sent by an access point, the user information field of the trigger frame includes a link identifier for D2D transmission and resource allocation for D2D transmission Information; the second station determines that the second station is the receiver of the D2D transmission link based on the link identifier of the D2D transmission; the second station receives the data sent by the first station in the D2D transmission resource unit indicated by the resource allocation information.
  • D2D transmission can be realized in a WiFi system.
  • the present application provides a D2D transmission method, the method includes: an access point generates a trigger frame, the user information field of the trigger frame includes a link identifier for D2D transmission and resource allocation information for D2D transmission; the access point Send the trigger frame.
  • D2D transmission can be realized in a WiFi system.
  • the present application provides a D2D transmission method, the method includes: a first station receives a downlink PPDU sent by an access point, the preamble of the downlink PPDU carries resource allocation information and a link identifier for D2D transmission, and the resource The allocation information is used to indicate the resource unit for D2D transmission; the first station determines that the first station is the sender of the D2D transmission link based on the link identifier of the D2D transmission, and the second station is the receiver of the D2D transmission link; The station sends data to the second station on the D2D transmission resource unit indicated by the resource allocation information.
  • D2D transmission can be realized in a WiFi system.
  • D2D transmission can be realized in a WiFi system.
  • the preamble further includes first indication information, and the first indication information indicates that the resource unit indicated by the resource allocation information is used for D2D transmission. Based on this possible implementation manner, it is helpful for the station to distinguish whether the resource unit allocated in the user information field is used for D2D transmission or downlink transmission. This possible implementation manner can also be applied to the following tenth aspect and eleventh aspect, and details are not repeated in the tenth aspect and eleventh aspect.
  • the first indication information is in the first bit (B0) to the eleventh bit (B10) of the user domain of the preamble. Based on this possible implementation manner, it is beneficial to save bits in the user information field. This possible implementation manner can also be applied to the following tenth aspect and eleventh aspect, and details are not repeated in the tenth aspect and eleventh aspect.
  • the 12th bit (B11) to the 21st bit (B20) of the user field of the preamble carries the link identifier of the D2D transmission.
  • the present application provides a D2D transmission method.
  • the method includes: a second station receives a downlink PPDU sent by an access point.
  • the preamble of the downlink PPDU carries resource allocation information and a link identifier for D2D transmission.
  • the allocation information is used to indicate the resource unit for D2D transmission; the second station determines that the second station is the receiver of the D2D transmission link based on the link identifier of the D2D transmission; the second station receives the first station in the D2D transmission resource unit indicated by the resource allocation information
  • the data sent by the site Based on the method described in the tenth aspect, D2D transmission can be realized in a WiFi system.
  • this application provides a D2D transmission method.
  • the method includes: an access point generates a downlink PPDU, the preamble of the downlink PPDU carries resource allocation information and a link identifier for D2D transmission, and the resource allocation information is used for Indicate the resource unit for D2D transmission; the access point sends the downlink PPDU.
  • D2D transmission can be realized in a WiFi system.
  • the present application provides a demand reporting method, the method includes: a site generates a demand report frame, the demand report frame is used to indicate that the site has a demand for D2D transmission; the site sends a demand report frame to an access point. Based on the method described in the twelfth aspect, the station can feed back the D2D transmission demand to the access point, so that the access point can allocate D2D transmission resources to the station.
  • the demand report frame includes demand report information
  • the demand report information includes one or more of the following information: the identifier of the recipient of the D2D transmission, and information used to determine the size of the D2D transmission traffic , D2D transmission service type.
  • the station can notify the access point of the recipient of the D2D transmission, the size of the D2D transmission service volume, and the D2D transmission service type.
  • the demand report information is carried in the control information field of the efficient control HE-control field of the demand report frame.
  • the demand report frame further includes a control identifier, and the control identifier is used to indicate that the control information field carries demand report information for D2D transmission. Based on this possible implementation manner, it is beneficial for the access point to be able to recognize the function of the demand report frame.
  • control identifier is carried in the control identifier field of the HE-control field of the high-efficiency control HE-control field of the demand report frame.
  • the station may also receive a demand report trigger frame sent by the access point, and the demand report trigger frame is a buffer report trigger frame.
  • the access point can trigger the station to send the demand report frame through the existing trigger frame, without redesigning a trigger frame to trigger the station to send the demand report frame.
  • the buffer report trigger frame includes third indication information, and the third indication information is used to indicate that the station is allowed to send a demand report frame for D2D transmission. Based on this possible implementation, only minor changes to the existing trigger frame triggers can trigger the station to send a demand report frame.
  • the third indication information is in the 40th bit of the user information field of the buffer report trigger frame.
  • the reserved bits of the 802.11ax standard can be modified to carry the third indication information, which is beneficial to saving bits in the user information field.
  • the method described in the twelfth aspect may be combined with the method described in the first, third, sixth or ninth aspect, or the method described in the twelfth aspect may also be implemented separately.
  • the present application provides a demand report method, the method includes: an access point receives a demand report frame sent by a station, and the demand report frame is used to indicate that the station has a demand for D2D transmission.
  • the access point After receiving the demand report frame sent by the station, the access point generates a trigger frame, and the trigger frame is used to trigger the station to perform D2D transmission.
  • the demand report frame also includes demand report information, and the demand report information includes one or more of the following information: the identifier of the receiver of the D2D transmission, and information used to determine the amount of D2D transmission. , D2D transmission service type.
  • the demand report information is carried in the control information field of the high-efficiency control HE-control field of the demand report frame.
  • the demand report frame further includes a control identifier, and the control identifier is used to indicate that the control information field carries demand report information for D2D transmission.
  • control identifier is carried in the control identifier field of the HE-control field of the high-efficiency control HE-control field of the demand report frame.
  • the access point may also send a demand report trigger frame to the station, and the demand report trigger frame is a buffer report trigger frame.
  • the buffer report trigger frame includes third indication information, and the third indication information is used to indicate that the station is allowed to send the D2D transmission demand report information.
  • the third indication information is in the 40th bit in the user information field of the buffer report trigger frame.
  • beneficial effects of the thirteenth aspect can be referred to the beneficial effects of the thirteenth aspect, which will not be repeated here.
  • the method described in the thirteenth aspect may be combined with the method described in the third, fifth, eighth or eleventh aspect, or the method described in the thirteenth aspect may also be implemented separately.
  • the present application provides a link allocation method.
  • the method includes: a station receives a link allocation frame for D2D transmission sent by an access point, and the link allocation frame includes a link identifier for D2D transmission and a link allocation frame for D2D transmission.
  • the sender ID and the receiver ID of the D2D transmission can allocate a D2D link to the station.
  • the method described in the fifteenth aspect can be combined with the methods described in the first, third, fourth, sixth, seventh, ninth, tenth, and twelfth aspects, or The method described in the fourteenth aspect can also be implemented separately.
  • the present application provides a D2D transmission method.
  • the method includes: an access point sends a D2D transmission link allocation frame to a station, the link allocation frame including the link identifier of the D2D transmission and the sender of the D2D transmission ID and the ID of the recipient of the D2D transmission.
  • the access point can allocate a D2D link to the station.
  • the method described in the fifteenth aspect can be combined with the methods described in the second, fifth, eighth, eleventh, and thirteenth aspects, or the method described in the fifteenth aspect can also be combined Implemented separately.
  • a communication device may be a site, a device in a site, or a device that can be matched and used with the site. Wherein, the communication device may also be a chip system.
  • the communication device can perform the method described in the first aspect, the third aspect, the fourth aspect, the sixth aspect, the seventh aspect, the ninth aspect, the tenth aspect, the twelfth aspect, or the fourteenth aspect.
  • the function of the communication device can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above-mentioned functions.
  • the unit can be software and/or hardware.
  • the operations and beneficial effects performed by the communication device can be found in the above-mentioned first, third, fourth, sixth, seventh, ninth, tenth, twelfth or fourteenth aspects. The described methods and beneficial effects will not be repeated here.
  • a communication device may be an access point, or a device in the access point, or a device that can be matched and used with the access point. Wherein, the communication device may also be a chip system.
  • the communication device can perform the method described in the second aspect, the fifth aspect, the eighth aspect, the eleventh aspect, the thirteenth aspect, or the fifteenth aspect.
  • the function of the communication device can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above-mentioned functions.
  • the unit can be software and/or hardware.
  • the operations and beneficial effects performed by the communication device can be referred to the methods and beneficial effects described in the second, fifth, eighth, eleventh, thirteenth, or fifteenth aspects. The repetition is not Go into details again.
  • the present application provides a communication device that includes at least one processor, and when the processor calls a computer program in a memory, such as the first, third, fourth, and fourth aspects
  • the method executed by the site in the method described in the sixth aspect, seventh aspect, ninth aspect, tenth aspect, twelfth aspect, or fourteenth aspect is executed.
  • the present application provides a communication device that includes at least one processor, and when the processor invokes a computer program in a memory, such as the second, fifth, eighth, and first The method executed by the access point in the method described in the eleventh aspect, the thirteenth aspect, or the fifteenth aspect is executed.
  • the present application provides a communication device.
  • the communication device includes a processor and a memory, where the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory to enable all
  • the communication device executes the operations performed by the station in the method described in the first aspect, the third aspect, the fourth aspect, the sixth aspect, the seventh aspect, the ninth aspect, the tenth aspect, the twelfth aspect, or the fourteenth aspect method.
  • the present application provides a communication device, the communication device includes a processor and a memory, the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory to enable The communication device executes the method executed by the access point in the method described in the second aspect, the fifth aspect, the eighth aspect, the eleventh aspect, the thirteenth aspect, or the fifteenth aspect.
  • the present application provides a communication device, the communication device includes a processor, a memory, and a transceiver, the transceiver is used to receive signals or send signals; the memory is used to store computer programs; The processor is configured to call the computer program from the memory to execute aspects such as the first aspect, the third aspect, the fourth aspect, the sixth aspect, the seventh aspect, the ninth aspect, the tenth aspect, and the twelfth aspect Or the method performed by the site in the method described in the fourteenth aspect.
  • the present application provides a communication device, the communication device includes a processor, a memory, and a transceiver, the transceiver is used to receive signals or send signals; the memory is used to store computer programs; The processor is configured to call the computer program from the memory to execute the method described in the second aspect, the fifth aspect, the eighth aspect, the eleventh aspect, the thirteenth aspect, or the fifteenth aspect. The method of entry point execution.
  • the present application provides a communication device that includes at least one processor and a communication interface, and the processor runs a computer program to execute aspects such as the first, third, fourth, and fourth aspects.
  • the present application provides a communication device that includes at least one processor and a communication interface, the communication interface is configured to receive a computer program and transmit it to the processor; the processor runs The computer program executes the method executed by the access point in the method described in the second aspect, the fifth aspect, the eighth aspect, the eleventh aspect, the thirteenth aspect, or the fifteenth aspect.
  • this application provides a computer-readable storage medium for storing instructions.
  • the instructions are executed, such as the first aspect, the third aspect, and the fourth aspect
  • the method executed by the site in the method described in the sixth, seventh, ninth, tenth, twelfth, or fourteenth aspect is implemented.
  • the present application provides a computer-readable storage medium for storing instructions.
  • the instructions are executed, such as the second, fifth, and eighth aspects
  • the method executed by the access point in the method described in the eleventh aspect, the thirteenth aspect, or the fifteenth aspect is implemented.
  • the present application provides a computer program product including instructions.
  • the instructions are executed, such as the first aspect, the third aspect, the fourth aspect, the sixth aspect, the seventh aspect, and the ninth aspect
  • the method executed by the site in the method described in the aspect, the tenth aspect, the twelfth aspect, or the fourteenth aspect is implemented.
  • the present application provides a computer program product including instructions.
  • the instructions are executed, such as the second aspect, the fifth aspect, the eighth aspect, the eleventh aspect, the thirteenth aspect, or the The method executed by the access point in the method described in the fifteenth aspect is implemented.
  • the present application provides a communication system including a station and an access point, the station can perform the method described in the first aspect above and the access point can perform the method described in the second aspect above
  • the communication system includes a first station that can perform the method described in the third aspect, a second station that can perform the method described in the fourth aspect, and access to the method described in the fifth aspect. Point; or, the communication system includes a first site that can perform the method described in the sixth aspect, a second site that can perform the method described in the seventh aspect, and an interface that can perform the method described in the eighth aspect.
  • the communication system includes a first site that can perform the method described in the ninth aspect, a second site that can perform the method described in the tenth aspect, and the method described in the eleventh aspect
  • the communication system includes a first station that can perform the method described in the twelfth aspect and an access point that can perform the method described in the thirteenth aspect; or, the communication system includes a The first station that executes the method described in the fourteenth aspect and the access point that executes the method described in the fifteenth aspect.
  • FIG. 1 is a schematic diagram of a system architecture provided by an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a D2D transmission method provided by an embodiment of the present application
  • FIG. 3 is a schematic diagram of a trigger frame structure provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of another trigger frame structure provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another trigger frame structure provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of another trigger frame structure provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another trigger frame structure provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of yet another second station replying to a BA frame provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of another second station replying to a BA frame provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of yet another second station replying to a BA frame provided by an embodiment of the present application.
  • FIG. 11 is a schematic flowchart of another D2D transmission method provided by an embodiment of the present application.
  • FIG. 12 is a schematic diagram of another trigger frame structure provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of another trigger frame structure provided by an embodiment of the present application.
  • FIG. 14 is a schematic diagram of another trigger frame structure provided by an embodiment of the present application.
  • FIG. 15 is a schematic flowchart of another D2D transmission method provided by an embodiment of the present application.
  • FIG. 16 is a schematic diagram of another trigger frame structure provided by an embodiment of the present application.
  • FIG. 17 is a schematic diagram of another trigger frame structure provided by an embodiment of the present application.
  • FIG. 18 is a schematic diagram of another trigger frame structure provided by an embodiment of the present application.
  • FIG. 19 is a schematic flowchart of another D2D transmission method provided by an embodiment of the present application.
  • FIG. 20 is a schematic diagram of another trigger frame structure provided by an embodiment of the present application.
  • FIG. 21 is a schematic diagram of a D2D transmission method provided by an embodiment of the present application.
  • FIG. 22 is a schematic diagram of another D2D transmission method provided by an embodiment of the present application.
  • FIG. 23 is a schematic flowchart of a demand reporting method provided by an embodiment of the present application.
  • FIG. 24 is a schematic structural diagram of a demand report frame provided by an embodiment of the present application.
  • FIG. 25 is a schematic structural diagram of a demand report trigger frame provided by an embodiment of the present application.
  • FIG. 26 is a schematic structural diagram of a link allocation frame provided by an embodiment of the present application.
  • FIG. 27 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 28a is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 28b is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • embodiments of the present application provide a device-to-device D2D transmission method and communication device. The following first describes the applicable system architecture of the embodiments of the present application:
  • FIG. 1 is a schematic diagram of a system architecture provided by an embodiment of the present application.
  • the system architecture includes an access point (access point, AP) and multiple non-access point stations (none access point station, non-AP STA).
  • access point access point
  • non-AP STA one access point station
  • site sites in the following text.
  • Figure 1 illustrates the system architecture including one access point and three sites as an example.
  • the system architecture can also include more access points and sites.
  • the system architecture can also include only two sites.
  • the access point can be the access point for terminal equipment (such as mobile phones) to enter the wired (or wireless) network. It is mainly deployed in homes, buildings, and parks. The typical coverage radius is from tens of meters to hundreds of meters. Can be deployed outdoors.
  • the access point is equivalent to a bridge connecting the wired network and the wireless network. The main function is to connect each wireless network client together, and then connect the wireless network to the Ethernet.
  • the access point may be a terminal device (such as a mobile phone) or a network device (such as a router) with a wireless fidelity (WiFi) chip.
  • the access point can be a device that supports the 802.11be standard.
  • the access point may also be a device supporting multiple wireless local area networks (WLAN) standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
  • WLAN wireless local area networks
  • the site can be a wireless communication chip, a wireless sensor, or a wireless communication terminal.
  • the site can be a mobile phone that supports WiFi communication function, a tablet computer that supports WiFi communication function, a set-top box that supports WiFi communication function, a smart TV that supports WiFi communication function, a smart wearable device that supports WiFi communication function, and WiFi communication function is supported.
  • the station can support the 802.11be standard.
  • the site can also support multiple wireless local area networks (WLAN) standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
  • WLAN wireless local area networks
  • access points and sites can be devices used in the Internet of Vehicles, IoT nodes and sensors in the Internet of Things, smart cameras, smart remote controls, smart water meters and electricity meters in smart homes, and sensors in smart cities, etc. .
  • the D2D transmission method and communication device provided in this application are further introduced below:
  • FIG. 2 is a schematic flowchart of a D2D transmission method according to an embodiment of the present application.
  • the D2D transmission method should be applicable to a hybrid transmission scenario where uplink transmission and D2D transmission are combined in a WiFi system.
  • the D2D transmission method includes the following steps 201 to 203.
  • the method shown in FIG. 2 may be executed by an access point and a station.
  • the execution subject of the method shown in FIG. 2 may be a chip in an access point and a chip in a site.
  • Figure 2 takes the access point and the station as the executive body as an example for illustration.
  • An access point generates a trigger frame (TF).
  • TF trigger frame
  • the trigger frame includes a user information (user info) field.
  • the user information field includes the site identifier, resource allocation information, first indication information, and second indication information.
  • the first indication information is used to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission
  • the second indication The information is used to indicate that the site is the sender or receiver of D2D transmission.
  • the trigger frame may also include other fields, which are not limited in this embodiment of the application.
  • D2D transmission may also be referred to as Tunneled Direct Link Setup (TDLS) transmission.
  • TDLS Tunneled Direct Link Setup
  • the site identifier may also be referred to as the site's Association Identifier (AID).
  • the site identifier can be the site's MAC address or an identifier generated based on the site's MAC address.
  • the resource allocation information is used to allocate a resource unit (resource unit, RU) for the site, and the resource allocation information is in the resource unit allocation (RU allocation) field of the user information field.
  • the first indication information may be one or more bits.
  • the first indication information may also be referred to as transmission type indication information.
  • the first indication information is 1bit, and its bit value can be 1 or 0. When the bit value is 1, it indicates that the resource unit indicated by the resource allocation information is used for D2D transmission. When the bit value is 0, it indicates the resource allocation information. The indicated resource unit is used for uplink transmission; or, when the bit value is 0, it indicates that the resource unit indicated by the resource allocation information is used for D2D transmission, and when the bit value is 1, it indicates that the resource unit indicated by the resource allocation information is used for uplink. transmission.
  • the first indication information includes 2 bits, and the bit value can be 00 or 11.
  • the bit value When the bit value is 00, it indicates that the resource unit indicated by the resource allocation information is used for D2D transmission; when the bit value is 11, it indicates the resource allocation The resource unit indicated by the information is used for uplink transmission; or, when the bit value is 11, it indicates that the resource unit indicated by the resource allocation information is used for D2D transmission; when the bit value is 00, it indicates the resource unit indicated by the resource allocation information Used for upstream transmission.
  • the first indication information may not indicate that the resource unit indicated by the resource allocation information is used for uplink transmission.
  • the second indication information may be one or more bits.
  • the second indication information may also be referred to as transmission role indication information.
  • the second indication information is 1bit, the bit value is 1 or 0, the bit value is 1, indicating that the station is the sender of D2D transmission, and the bit value is 0, indicating that the station is the receiver of D2D transmission; or, the bit value is 0, indicating that the station is the sender of D2D transmission, and the bit value is 1, indicating that the station is the receiver of D2D transmission.
  • the second indication information includes 2 bits, the bit value is 00 or 11, the bit value is 00, indicating that the station is the sender of D2D transmission, and the bit value is 11, indicating that the station is the receiver of D2D transmission; or, the bit value It is 11, indicating that the station is the sender of D2D transmission, and the bit value is 00, indicating that the station is the receiver of D2D transmission.
  • the first indication information is used to indicate that the resource unit indicated by the resource allocation information is used for uplink transmission
  • the second indication information is not carried in the trigger frame.
  • the user information field includes 48 bits.
  • a station that supports the 802.11ax standard parses only 48 bits of the user information field after receiving the trigger frame. If the user information field is set to more than 48 bits, a site that supports the 802.11ax standard will not be able to parse the user information field normally. Based on this possible implementation, all user information fields are 48 bits, and stations supporting 802.11ax can parse the trigger frame normally, and D2D transmission can be compatible with OFDMA uplink transmission or random access of 802.11ax stations.
  • the first indication information is in the 40th bit of the user information field (B39).
  • the 40th bit (B39) is a reserved bit. The embodiment of the application modifies the reserved bit to be used to carry the first indication information, which can avoid adding a new bit in the user information field to carry the first indication information, which is beneficial to Save bits in the user information field.
  • the second indication information is in the 46th bit (B45) of the user information field. That is, the second indication information is in the sixth bit (B5) of the user information field (trigger dependent user info) related to the trigger type in the user information field.
  • the 46th bit (B45) of the user information field of the trigger frame structure of the 802.11ax standard is a reserved bit. This embodiment of the application modifies the reserved bit to be used to carry the second indication information, which can avoid adding a new bit in the user information field to carry the second indication information, which is beneficial to Save bits in the user information field.
  • the 46th bit (B45) of the user information field is a reserved bit.
  • the first indication information and the second indication information may also be indicated by one field. That is, the value of one field indicates that the resource unit indicated by the resource allocation information is used for D2D transmission, and also indicates that the station is the sender or receiver of D2D transmission. For example, when the value of this field is the first value, it indicates that the resource unit indicated by the resource allocation information is used for D2D transmission, and the station is the sender of D2D transmission; when the value of this field is the second value, it indicates that the resource allocation information is used for D2D transmission.
  • the indicated resource unit is used for D2D transmission, and the station is the receiver of D2D transmission; when the value of this field is the third value, it indicates that the resource unit indicated by the resource allocation information is used for uplink transmission.
  • the first value may be 00
  • the second value may be 01
  • the third value may be 10.
  • the site identifier is in the first bit (B0) to the twelfth bit (B11) of the user information field.
  • the resource allocation information is in the 13th bit (B12) to the 20th bit (B19) of the user information field.
  • the user information field of the trigger frame includes 48 bits.
  • the first bit (B0) to the twelfth bit (B11) of the user information field carry the site identifier.
  • the 13th bit (B12) to the 20th bit (B19) of the user information field carry resource allocation information.
  • the 40th bit (B39) of the user information field carries the first indication information. If the bit value of the first indication information is 1, the resource unit used to indicate that the resource allocation information is allocated is used for D2D transmission. If the bit value of the first indication information is 0, the resource unit used to indicate that the resource allocation information is allocated is used for uplink transmission. When the bit value of the first indication information is 0, the sixth bit (B5) of the user information field (trigger dependent user info) related to the trigger type of the user information field is a reserved bit.
  • the sixth bit (B5) of the user information field (trigger dependent user info) related to the trigger type of the user information field carries the second indication information.
  • FIG. 3 takes the bit value of the first indication information as 1 as an example. If the bit value of the second indication information is 1, it is used to indicate that the station is the sender of D2D transmission. If the bit value of the second indication information is 0, it is used to indicate that the station is the receiver of D2D transmission.
  • the first indication information is in the 6th bit (B5) of the user information field (trigger dependent user info) related to the trigger type in the user information field.
  • the second indication information is in the 40th bit of the user information field (B39). That is, the bit position of the first indication information and the bit position of the second indication information in FIG. 3 are exchanged.
  • the structure of the trigger frame after the exchange is shown in Figure 4.
  • the site identifier is in the first bit (B0) to the eleventh bit (B10) of the user information field.
  • the 12th bit (B11) of the user information field can be used to carry other information.
  • the first indication information may be in the 12th bit (B11) of the user information field.
  • the second indication information may be in the 12th bit (B11) of the user information field.
  • the access point sends a trigger frame.
  • the access point may send the trigger frame.
  • the access point can broadcast the trigger frame to the stations under the access point.
  • the station performs D2D transmission on the transmission resource unit indicated by the resource allocation information.
  • the station after the station receives the trigger frame sent by the access point, if the station is the sender of the D2D transmission, the station sends data to the receiver of the D2D transmission on the transmission resource unit indicated by the resource allocation information. If the station is the receiver of the D2D transmission, the station receives the data sent by the sender of the D2D transmission on the transmission resource unit indicated by the resource allocation information.
  • the trigger frame includes a frame control (frame control) field, a duration (duration) field, a receiving address (RA) field, a sending address (TA) field, a common info field, and multiple fields.
  • the multiple user information fields include at least a user information 1 (user info1) field and a user information 2 (user info2) field.
  • the trigger frame may also include only some of the fields shown in FIG. 7, or the trigger frame may include more fields than those shown in FIG. 7.
  • the user information 1 field includes 48 bits
  • the user information 2 field includes 48 bits.
  • the first bit (B0) to the twelfth bit (B11) of the user information 1 field carry the identity of the first station.
  • the 13th bit (B12) to the 20th bit (B19) of the user information 1 field carry resource allocation information 1.
  • the 40th bit (B39) of the user information 1 field carries the first indication information 1. If the bit value of the first indication information 1 is 1, it is used to indicate that the resource unit allocated by the first resource allocation information is used for D2D transmission. If the bit value of the first indication information is 0, it is used to indicate that the resource unit allocated by the first resource allocation information is used for uplink transmission.
  • the sixth bit (B5) of the user information field (trigger dependent user info) related to the trigger type of the user information 1 field is a reserved bit.
  • the sixth bit (B5) of the user information field (trigger dependent user info) related to the trigger type of the user information 1 field carries the second indication information 1. If the bit value of the second indication information 1 is 1, it is used to indicate that the first station is the sender of D2D transmission. If the bit value of the second indication information 1 is 0, it is used to indicate that the first station is the receiver of D2D transmission.
  • FIG. 7 takes the bit value of the first indication information 1 as 1, and the bit value of the second indication information 1 as an example.
  • the first bit (B0) to the twelfth bit (B11) of the user information 2 field carry the identifier of the second station.
  • the 13th bit (B12) to the 20th bit (B19) of the user information 2 field carry resource allocation information 2.
  • the 40th bit (B39) of the user information 2 field carries the first indication information 2.
  • the bit value of the first indication information 2 is 1, it is used to indicate that the resource unit allocated by the resource allocation information 2 is used for D2D transmission. If the bit value of the first indication information 2 is 0, it is used to indicate that the resource unit allocated by the resource allocation information 2 is used for uplink transmission.
  • the sixth bit (B5) of the user information field (trigger dependent user info) related to the trigger type of the user information 2 field carries the second indication information 2. If the bit value of the second indication information 2 is 1, it is used to indicate that the second station is the sender of D2D transmission. If the bit value of the second indication information 2 is 0, it is used to indicate that the second station is the receiver of D2D transmission.
  • Fig. 7 takes the bit value of the first indication information 2 as 1, and the bit value of the second indication information 2 as an example.
  • the resource unit indicated by the resource allocation information 1 is the same as the resource unit indicated by the resource allocation information 2.
  • the resource unit indicated by the resource allocation information 1 includes the resource unit indicated by the resource allocation information 2 in the frequency domain. After the first station receives the trigger frame, the resource unit indicated by the resource allocation information 1 sends data to the second station. After the second station receives the trigger frame, the resource unit indicated by the resource allocation information 2 receives the data sent by the first station.
  • the functions of the user information 1 and the user information 2 are the same.
  • the user information is described by numbers. The same applies to resource allocation information 1 and resource allocation information 2, first instruction information 1 and first instruction information 2, second instruction information 1 and second instruction information 2.
  • the user information fields of the first site and the second site are adjacent. In the user information fields of the first site and the second site, only one user information field may have resource allocation information. A site that does not have resource allocation information in the user information field can parse the resource allocation information from the user information field of another site to obtain a resource unit for D2D transmission. Based on this possible implementation manner, the bits of the user information field can be saved, so that the saved bits can be used to carry other parameters, which is beneficial to carry more parameters.
  • the user information 1 field is adjacent to the user information 2 field, and the user information 1 field is before the user information 2 field.
  • the user information 1 field carries the identifier of the first site, resource allocation information 1, first indication information 1, and second indication information 1.
  • the user information 2 field carries the identifier of the second site.
  • the bits of the resource allocation information 2, the first indication information 2 and the second indication information 2 in the user information 2 field may be set as reserved bits or used to carry other parameters.
  • the second station analyzes the information in the trigger frame. After the identification of the second site in the user information 2 field is parsed, the second site parses the resource allocation information 1 from the user information 1 field adjacent to the user information 2 field to determine the D2D transmission resource. The second station then receives the data sent by the first station on the D2D transmission resource unit. The same is true for the user information 1 field after the user information 2, and will not be repeated here.
  • the trigger frame may also include a user information 3 field, and the user information 3 field is used to allocate a resource unit for uplink transmission to the third station.
  • the third station After receiving the trigger frame, the third station sends uplink data to the access point on the allocated resource unit for uplink transmission. After receiving the uplink data, the access point sends an acknowledgement frame (ACK frame) or block acknowledgement frame (BA frame) to the third station. If the access point receives uplink data sent by multiple stations, the access point may also send a multi-user block confirmation frame (MBA) to the multiple stations.
  • MBA multi-user block confirmation frame
  • the first station may also send a BA request frame (BA request, BAR) to the second station.
  • the BA request frame may be sent immediately after the preamble frame (for example, at a fixed time interval, such as a short inter-frame interval SIFS).
  • the preamble frame may be an acknowledgment frame (ACK frame) or a block acknowledgment frame (BA frame) or a multi-user block acknowledgment frame (MBA) sent by the access point, or a data frame sent by a third station.
  • ACK frame acknowledgment frame
  • BA frame block acknowledgment frame
  • MSA multi-user block acknowledgment frame
  • the second station After receiving the BA request frame, the second station sends the BA frame to the first station.
  • two user information fields can be used to completely indicate a D2D link without additional signaling overhead.
  • the implementation method is simple, and in the same trigger frame, 802.11ax-supporting stations can also be scheduled to perform OFDMA uplink transmission or random access realizes backward compatibility.
  • Method 1 As shown in Figure 8, the access point and the second station reply to the BA frame at the same time.
  • the access point replies to the BA separately for each uplink transmission station at the RU level, that is, the access point receives the station’s data on any RU, and then replies to the BA for this station on this RU.
  • Figure 8 shows an example of the third and fourth stations as the upstream transmission stations.
  • the second station replies with a BA frame on the RU that receives the D2D data.
  • the PPDU carrying the D2D BA frame is only transmitted on the RU where the second station receives the D2D data.
  • the preamble of the PPDU does not occupy 20 MHz, but only the RU where the second station receives the D2D data.
  • Method 2 As shown in Figure 9, the access point and the second station reply to the BA frame at the same time.
  • the access point responds to the MBA for multiple uplink transmission stations in a larger bandwidth.
  • Figure 9 shows an example of the third and fourth stations as the upstream transmission stations.
  • the specific implementation manner of the second station's replying to the BA frame is the same as the specific implementation manner of the second site's replying to the BA frame in the foregoing manner 1, and will not be repeated here.
  • Manner 3 As shown in Figure 10, the access point and the second station reply to the BA frame at the same time.
  • This method is applicable to the introduced multi-link technology (Multi-link).
  • Multi-link after receiving the D2D data, the second station directly replies to the BA frame on the entire 20 MHz after waiting for the SIFS.
  • the access point replies to the MBA of multiple links on another link that is not D2D transmission.
  • the second station Based on the implementation of the second station's response to the BA frame described in the above mode 1 to mode 3, it is beneficial to avoid interference between the BA frame returned by the access point and the BA frame returned by the second station.
  • the above three ways for the second station to reply to the BA frame can also be used alone and not combined with the previous scheme.
  • the access point can allocate D2D transmission resource units to the first station and the second station, so that the first station and the second station can implement D2D transmission in the WiFi system.
  • the first frame structure of the trigger frame is introduced.
  • the embodiment of the present application also provides another D2D transmission method and two other frame structures of trigger frames.
  • FIG. 11 is a schematic flowchart of a D2D transmission method according to an embodiment of the present application.
  • the D2D transmission method includes the following steps 1101 to 1103.
  • the method shown in FIG. 11 may be executed by an access point and a station.
  • the execution subject of the method shown in FIG. 11 may be a chip in an access point and a chip in a site.
  • Fig. 11 takes the access point and the station as the executive body as an example for description. among them:
  • the access point generates a trigger frame.
  • the trigger frame includes a user information field
  • the user information field includes the identification of the first station, resource allocation information, first indication information, and first identification information.
  • the first station is the sender of D2D transmission, and the first indication The information is used to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission, the first identification information is the identification of the second site, the second site is the recipient of the D2D transmission, or the first identification information is D2D The transmission link ID.
  • the resource allocation information is used to allocate resource units for D2D transmission, and the resource allocation information is in the RU allocation field of the user information field.
  • the first identification information may be a partial identification or a complete identification of the second site.
  • the user information field of the trigger frame includes 48 bits. Based on this possible implementation, it is beneficial to improve system compatibility.
  • the first indication information is in the 40th bit (B39) of the user information field; or the first indication information is in the 12th bit (B11) of the user information field; or the first indication information is in the user information field.
  • the 46th bit (B45) of the information field that is, the 6th bit (B5) of the trigger-dependent user information field (trigger dependent user info) in the first user information field where the first indication information is located. Based on this possible implementation manner, it is beneficial to reduce the bits of the user information field.
  • the first identification information is in the 33rd bit (B32) to the 39th bit (B38) of the user information field.
  • the UL Target RSSSI subfield (B32-B38) of the user information field can be multiplexed to carry the first identification information.
  • the 33rd bit (B32) to the 39th bit (B38) carry the first identification information.
  • the 33rd bit (B32) to the 39th bit (B38) of the user information field is the UL Target RSSI field. Based on this possible implementation manner, it is beneficial to reduce the bits of the user information field.
  • the identity of the first station is in the first bit (B0) to the twelfth bit (B11) of the user information field.
  • the identity of the first station is in the first bit (B0) to the eleventh bit (B10) of the user information field.
  • the resource allocation information is in the 13th bit (B12) to the 20th bit (B19) of the user information field.
  • the trigger frame includes a frame control (frame control) field, a duration (duration) field, a receiving address (RA) field, a sending address (TA) field, a common information (common info) field, and multiple fields.
  • the trigger frame may also include only some of the fields shown in FIG. 12, or the trigger frame may include more fields than those shown in FIG. 12.
  • the user information field includes 48 bits.
  • the 13th bit (B12) to the 20th bit (B19) of the user information field carry resource allocation information.
  • the 40th bit (B39) of the user information field carries the first indication information. If the bit value of the first indication information is 1, it is used to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission. If the bit value of the first indication information is 0, it is used to indicate that the resource unit indicated by the resource allocation information is used for uplink transmission. If the bit value of the first indication information is 0, the 33rd bit (B32) to the 39th bit (B38) of the user information field is the UL Target RSSI field.
  • the 33rd bit (B32) to the 39th bit (B38) of the user information field carry the first identification information.
  • the first identification information is the identification of the second station or the link identification of the D2D transmission.
  • the first bit (B0) to the twelfth bit (B11) of the user information field carry the identifier of the sender of the D2D transmission.
  • the first station is the sender of the D2D transmission. Therefore, if the bit value of the first indication information is 1, the first bit (B0) to the twelfth bit (B11) of the user information field carry the identity of the first station.
  • FIG. 12 takes the bit value of the first indication information as 1 as an example.
  • the first indication information can also be in the 12th bit (B11) of the user information field, and the first bit (B0) to the 11th bit (B10) of the user information field carry the data of D2D transmission.
  • the identity of the sender is not limited to the 12th bit (B11) of the user information field, and the first bit (B0) to the 11th bit (B10) of the user information field carry the data of D2D transmission. The identity of the sender.
  • the first indication information may also be in the 46th bit (B45) of the user information field, that is, the first indication information may be in the trigger dependent user information field (trigger dependent) in the first user information field.
  • the access point sends the trigger frame.
  • the access point after generating the trigger frame, the access point sends the trigger frame.
  • the access point can broadcast the trigger frame to the stations under the access point.
  • the first station sends data to the second station on the D2D transmission resource unit indicated by the resource allocation information.
  • the first station parses the user information field in the trigger frame to obtain the link identification of D2D transmission.
  • the first station determines that the second station is the receiver based on the link identifier of the D2D transmission, and sends data to the second station on the D2D transmission resource unit indicated by the resource allocation information.
  • the specific implementation manner in which the first station determines that the second station is the receiver based on the link identifier of the D2D transmission is: the first station according to the pre-stored link identifier of the D2D transmission and the receiver identifier of the D2D transmission, the D2D transmission The correspondence relationship between the receiver identifiers determines that the second site is the receiver of the D2D transmission.
  • the second station parses the user information field in the trigger frame to obtain the link identifier of D2D transmission, and determines that the second station is the receiver of D2D transmission based on the link identifier of D2D transmission.
  • the second station receives the data sent by the first station on the D2D transmission resource allocated by the resource allocation information.
  • the first site and the second site store the corresponding relationships shown in Table 1 below. If the user information field in the trigger frame carries the link identifier 1 of the D2D transmission. After the first station receives the trigger frame, the first station determines that the second station is the receiver of the D2D transmission based on the correspondence shown in Table 1. The first station sends data to the second station on the D2D transmission resource unit allocated by the resource allocation information. After the second station receives the trigger frame, the second station determines that the second station is the receiver of the D2D transmission based on the correspondence shown in Table 1. The second station receives the data sent by the first station on the D2D transmission resource unit allocated by the resource allocation information.
  • Link ID for D2D transmission The sender ID of the D2D transmission link Receiver ID of D2D transmission link Link ID of D2D transmission 1 ID of the first site ID of the second site
  • Link ID for D2D transmission 2 ID of the first site The identity of the third site
  • the first site determines the site that includes the first identification information in the identification information as the second site, and sends it to the second site on the D2D transmission resource unit indicated by the resource allocation information send data.
  • the site identifiers stored by the first site include 111111111111 for site 1, 000000000000 for site 2, and 110110110110 for site 3. If the first identification information is 1111111, the first station sends data to station 1 on the D2D transmission resource unit indicated by the resource allocation information.
  • the trigger frame may further include a third user information field, where the third user information field is used to allocate a resource unit for uplink transmission to the third station.
  • the third station After receiving the trigger frame, the third station sends uplink data to the access point on the allocated resource unit for uplink transmission. After receiving the uplink data, the access point sends an acknowledgement frame (ACK frame) or block acknowledgement frame (BA frame) to the third station. If the access point receives uplink data sent by multiple stations, the access point may also send a multi-user block confirmation frame (MBA) to the multiple stations.
  • MBA multi-user block confirmation frame
  • the first station sends a BA request frame (ba request, BAR) to the second station.
  • the BA request frame may be sent immediately after the preamble frame (for example, at a fixed time interval, such as a short inter-frame interval SIFS).
  • the preamble frame may be an acknowledgment frame (ACK frame) or a block acknowledgment frame (BA frame) or a multi-user block acknowledgment frame (MBA) sent by the access point, or a data frame sent by a third station.
  • ACK frame acknowledgment frame
  • BA frame block acknowledgment frame
  • MSA multi-user block acknowledgment frame
  • the second station sends the BA frame to the first station.
  • a user information field can be used to completely indicate a D2D link without additional signaling overhead.
  • the implementation method is simple, and in the same trigger frame, stations supporting 802.11ax can also be scheduled for OFDMA Uplink transmission or random access realizes backward compatibility.
  • the access point can allocate D2D transmission resource units to the first station and the second station, so that the first station and the second station can implement D2D transmission in the WiFi system.
  • FIG. 15 is a schematic flowchart of a D2D transmission method according to an embodiment of the present application.
  • the D2D transmission method includes the following steps 1501 to 1505.
  • the method shown in FIG. 15 may be executed by an access point and a station.
  • the execution subject of the method shown in FIG. 15 may be a chip in an access point and a chip in a site.
  • Figure 15 takes the access point and the station as the executive body as an example for illustration. among them:
  • the access point generates a trigger frame.
  • the user information field of the trigger frame includes the link identifier of the D2D transmission and the resource allocation information of the D2D transmission.
  • the link identifier for D2D transmission may also be referred to as the link association identifier (AID) for D2D transmission.
  • the user information field of the trigger frame includes 48 bits. Based on this possible implementation, it is beneficial to improve system compatibility.
  • the link identifier of the D2D transmission is in the first bit (B0) to the twelfth bit (B11) of the user information field.
  • the link identifier of D2D transmission can be multiplexed with the association identifier (AID) from the first bit (B0) to the twelfth bit (B11) of the user information field, which is conducive to saving bits in the user information field. .
  • any one of the link identifier of D2D transmission and the access point is The identifiers of the sites are different, which helps to prevent the site from interpreting the link identifier of the D2D transmission as the identifier of the site.
  • the trigger frame includes a frame control (frame control) field, a duration (duration) field, a receiving address (RA) field, a sending address (TA) field, a common information (common info) field, and multiple fields.
  • the trigger frame may also include only some of the fields shown in FIG. 16, or the trigger frame may include more fields than those shown in FIG. 16.
  • the user information field includes 48 bits.
  • the link identifier for D2D transmission is in the first bit (B0) to the twelfth bit (B11) of the user information field.
  • the 13th bit (B12) to the 20th bit (B19) of the user information field carry resource allocation information for D2D transmission.
  • the link identifier for D2D transmission may also be in the first bit (B11) to the eleventh bit (B10) of the user information field, and the twelfth bit of the user information field may be used to carry other parameters.
  • the user information field further includes first indication information, where the first indication information is used to indicate that the resource allocated by the resource allocation information is used for D2D transmission. Based on this possible implementation manner, it is advantageous for the station to distinguish whether the resource unit allocated in the user information field is used for D2D transmission or uplink transmission.
  • the first indication information may be in the first bit (B0) to the twelfth bit (B11) of the user information field. Based on this possible implementation manner, the first indication information can multiplex the first bit (B0) to the twelfth bit (B11) of the user information field with the association identifier (AID), which is beneficial to saving bits in the user information field.
  • AID association identifier
  • the link identifier of the D2D transmission is in the 33rd bit of the user information field.
  • Bit (B32) to 39th bit (B38), or the link identifier of D2D transmission is in the 33rd bit (B32) to 40th bit (B39) of the user information field.
  • the UL Target RSSI subfield (B32-B38) of the user information field can be reused to carry the link identifier of the D2D transmission, which is beneficial to saving bits in the user information field.
  • the value of the first indication information may be any one of 2008-2044 and 2047-4094.
  • the user information field includes 48 bits.
  • the first indication information is in the first bit (B0) to the twelfth bit (B11) of the user information field.
  • the value of the first indication information is 2047, which is used to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission.
  • the 13th bit (B12) to the 20th bit (B19) of the user information field carry resource allocation information for D2D transmission.
  • the 33rd bit (B32) to the 39th bit (B38) of the user information field carry the link identifier of the D2D transmission. Or, as shown in FIG.
  • the 33rd bit (B32) to the 40th bit (B39) of the user information field carry the link identifier of the D2D transmission.
  • the first indication information indicates the identity of the station, and the 33rd bit (B32) to the 39th bit (B38) are the UL Target RSSI field, and the 40th user information field Bit (B39) is reserved. 17 and 18 take the value of the first indication information of 2047 as an example.
  • the access point sends a trigger frame.
  • the first station determines that the first station is the sender of the D2D transmission link based on the link identifier of the D2D transmission, and determines that the second station is the receiver of the D2D transmission link.
  • the first station after receiving the trigger frame, parses the user information field in the trigger frame to obtain the link identifier of the D2D transmission.
  • the first station determines that the first station is the sender of the D2D transmission link and the second station is the D2D according to the correspondence between the pre-stored D2D transmission link identifier and the receiver identifier of the D2D transmission and the receiver identifier of the D2D transmission.
  • the receiver of the transmission link is the receiver of the transmission link.
  • the first station sends data to the second station on the D2D transmission resource unit indicated by the resource allocation information.
  • the first station After the first station determines that the first station is the sender of the D2D transmission link and determines that the second station is the receiver of the D2D transmission link, it sends data to the second station on the D2D transmission resource unit indicated by the resource allocation information.
  • the second station determines that the second station is the receiver of the D2D transmission link based on the link identifier of the D2D transmission.
  • the second station after receiving the trigger frame, parses the user information field in the trigger frame to obtain the link identifier of the D2D transmission.
  • the second station determines that the second station is the receiver of the D2D transmission according to the pre-stored correspondence between the link identifier of the D2D transmission, the receiver identifier of the D2D transmission, and the receiver identifier of the D2D transmission.
  • the second station receives the data sent by the first station on the D2D transmission resource allocated by the resource allocation information.
  • the trigger frame may further include a third user information field, where the third user information field is used to allocate a resource unit for uplink transmission to the third station.
  • the third station After receiving the trigger frame, the third station sends uplink data to the access point on the allocated resource unit for uplink transmission. After receiving the uplink data, the access point sends an acknowledgement frame (ACK frame) or block acknowledgement frame (BA frame) to the third station. If the access point receives uplink data sent by multiple stations, the access point may also send a multi-user block confirmation frame (MBA) to the multiple stations.
  • MBA multi-user block confirmation frame
  • the first station sends a BA request frame (ba request, BAR) to the second station.
  • the BA request frame may be sent immediately after the preamble frame (for example, at a fixed time interval, such as a short inter-frame interval SIFS).
  • the preamble frame may be an acknowledgment frame (ACK frame) or a block acknowledgment frame (BA frame) or a multi-user block acknowledgment frame (MBA) sent by the access point, or a data frame sent by a third station.
  • ACK frame acknowledgment frame
  • BA frame block acknowledgment frame
  • MSA multi-user block acknowledgment frame
  • the second station sends the BA frame to the first station.
  • the access point can allocate D2D transmission resource units to the first station and the second station, so that the first station and the second station can implement D2D transmission in the WiFi system.
  • the embodiment of the present application also provides a D2D transmission method.
  • the D2D transmission method can be applied to a hybrid transmission scenario where downlink transmission and D2D transmission are combined in a WiFi system.
  • FIG. 19 is a schematic flowchart of another D2D transmission method according to an embodiment of the present application.
  • the D2D transmission method includes the following steps 1901 to 1905.
  • the method shown in FIG. 19 may be executed by an access point and a station.
  • the execution subject of the method shown in FIG. 19 may be an access point and a chip in a station.
  • Figure 19 takes the access point and the station as the execution subject as an example for description. among them:
  • the access point generates a downlink protocol data unit (PHY protocol data unit, PPDU).
  • PHY protocol data unit PHY protocol data unit
  • the preamble of the downlink PPDU carries resource allocation information and a link identifier for D2D transmission
  • the resource allocation information is used to indicate a resource unit for D2D transmission.
  • the link identifier of the D2D transmission may be a partial identifier or a complete identifier of the link of D2D transmission.
  • the link identifier of the D2D transmission may be the first ten bits of the link identifier of the D2D transmission.
  • the preamble further includes first indication information, the first indication information indicating that the resource unit indicated by the resource allocation information is used for D2D transmission. Based on this possible implementation manner, it is helpful for the station to distinguish whether the resource unit allocated in the user information field is used for D2D transmission or downlink transmission. For example, when the value of the first indication information is set to 2046, it indicates that the resource unit indicated by the resource allocation information is used for D2D transmission. Otherwise, the first indication information indicates that the resource unit indicated by the resource allocation information is used for downlink transmission. Alternatively, when the first indication information indicates that the resource unit indicated by the resource allocation information is used for D2D transmission, the value of the first indication information is other reserved values specified in the 802.11ax standard protocol, which is not limited in this embodiment of the application.
  • the first indication information is in the first bit (B0) to the eleventh bit (B10) of the user domain of the preamble. Based on this possible implementation manner, it is beneficial to save bits in the user information field.
  • the 12th bit (B11) to the 21st bit (B20) of the user field of the preamble carries Link ID for D2D transmission. Otherwise, the 12th bit (B11) to the 21st bit (B20) of the user domain of the preamble carries the information specified in the 802.11ax standard.
  • the value of the first indication information is 2046, indicating that the resources allocated by the resource allocation information are used for D2D transmission as an example.
  • the access point sends a downlink PPDU.
  • the access point may send the downlink PPDU.
  • the access point can broadcast downlink PPDUs to stations under the access point.
  • the first station determines that the first station is the sender of the D2D transmission link based on the link identifier of the D2D transmission, and determines that the second station is the receiver of the D2D transmission link.
  • the first station and the second station store the corresponding relationship between the link identifier of the D2D transmission and the sender identifier of the D2D transmission link and the receiver identifier of the D2D transmission link.
  • the first station can determine that the first station is the sender of the D2D transmission link and the second station is the receiver of the D2D transmission link based on the correspondence and the link identifier of the D2D transmission carried in the preamble of the downlink PPDU .
  • the second station After the second station receives the downlink PPDU, the second station determines that the second station is the receiver of the D2D transmission based on the corresponding relationship.
  • the first station sends data to the second station on the D2D transmission resource unit allocated by the resource allocation information.
  • the second station determines that the second station is the receiver of the D2D transmission link based on the link identifier of the D2D transmission.
  • the second station after the second station determines that the second station is the receiver of D2D transmission based on the corresponding relationship, the second station receives the data sent by the first station on the D2D transmission resource allocated by the resource allocation information.
  • the first station sends data to the second station at 20 MHz or an integer multiple thereof. That is, the D2D transmission resource unit allocated by the resource allocation information is 20 MHz or an integer multiple of 20 MHz in the frequency domain.
  • the preamble of the D2D PPDU may be sent in a single user (single user, SU) format. Based on this possible implementation, since the preamble and the data part occupy the same bandwidth, the physical layer preamble part of the D2D transmission does not overlap with the physical layer preamble part of the downlink transmission, which is beneficial to avoid interference.
  • the first station may send data to the second station on a more fine-grained RU, that is, less than 20 MHz.
  • the PPDU transmitted by D2D can only work within the range of the RU, that is, the PPDU (including the preamble) transmitted by D2D is completely sent on the RU. Based on this possible implementation manner, D2D transmission resources can be allocated more flexibly.
  • the access point can allocate D2D transmission resource units to the first station and the second station, so that the first station and the second station can implement D2D transmission in the WiFi system.
  • FIG. 23 is a schematic flowchart of a demand reporting method provided by an embodiment of the present application.
  • the demand reporting method includes the following steps 2301 to 2302, and the execution subject of the method shown in FIG. 23 may be a site. Alternatively, the execution subject of the method shown in FIG. 23 may be a chip in a site.
  • Figure 23 takes the site as the execution subject as an example for description. among them:
  • the site generates a demand report frame.
  • the demand report frame is used to indicate that the station has a demand for D2D transmission.
  • the station sends a demand report frame to the access point.
  • the access point can receive the demand report frame.
  • the access point after receiving the demand report frame sent by the station, the access point generates a trigger frame, and the trigger frame is used to trigger the station to perform D2D transmission.
  • the demand report frame includes demand report information
  • the demand report information includes one or more of the following information: the identifier of the recipient of the D2D transmission, and information used to determine the size of the D2D transmission traffic , D2D transmission service type.
  • the station can notify the access point of the recipient of the D2D transmission, the size of the D2D transmission service volume, and the D2D transmission service type.
  • the size of the service volume of the D2D transmission may be the number of bytes of the data volume to be sent to the second station contained in the buffer area of the station.
  • the service volume of D2D transmission may be the service volume of the service with the highest priority.
  • the service volume of D2D transmission may be the service volume of all services.
  • the information used to determine the size of the service volume of D2D transmission may be directly the size of the service volume of D2D transmission, the total queue length, or a scale factor.
  • the total queue length is the total length of data waiting to be sent in all queues.
  • the access point can determine the business volume of D2D transmission based on the scale factor. For example, the scale factor can be multiplied by the business volume unit to equal the business volume of D2D transmission.
  • the service type of D2D transmission may be the access class (ACI) of D2D transmission or may be other service types.
  • ACI access class
  • the demand report information is carried in the control information field of the high-efficiency control HE-control field of the demand report frame.
  • the HE-control field can be in the MAC header.
  • the HE-control field may include a control ID (control ID) field and a control information (control information) field.
  • the HE-control field may include 30 bits.
  • the control ID field is the first 4 bits of the HE-control field, and the control information (control information) field is the last 26 bits of the HE-control field.
  • the demand report frame further includes a control identifier, and the control identifier is used to indicate that the control information field carries demand report information for D2D transmission. Based on this possible implementation manner, it is beneficial for the access point to be able to recognize the function of the demand report frame.
  • control identifier is carried in the control identifier field of the HE-control field of the high-efficiency control HE-control field of the demand report frame.
  • control identifier may also be carried in other fields of the HE-control field for efficient control.
  • the HE-control field includes a control ID (control ID) field and a control information (control information) field.
  • the control ID (control ID) field is the first 4 bits of the HE-control field
  • the control information (control information) field is the last 26 bits of the HE-control field.
  • the control information (control information) field includes demand report information
  • the demand report information includes the identifier of the second site, the access level indicator bitmap, the scale factor, and the total queue length.
  • the access point before the station generates a demand report frame, the access point sends a demand report trigger frame to the station, and the demand report trigger frame is a buffer report trigger frame. After the station receives the demand report trigger frame, it generates the demand report frame. In this possible implementation, the station can directly generate the demand report frame after the trigger frame is reported by the receiving buffer. Alternatively, the buffer report trigger frame includes third indication information, and the third indication information is used to indicate that the station is allowed to send a demand report frame for D2D transmission. After the station parses the third indication information used to indicate that the station is allowed to send the demand report frame for D2D transmission, the demand report frame is generated. Based on this possible implementation, the access point can trigger the station to send the demand report frame through the existing trigger frame, without redesigning a trigger frame to trigger the station to send the demand report frame.
  • the third indication information may be one or more bits.
  • the bit value of the third indication information is 1 or 0.
  • the bit value of the third indication information is 1, it is used to indicate that the station is allowed to send a demand report frame for D2D transmission.
  • the bit value of the second indication information is 0, it is used to indicate that the station is allowed to send the demand report frame for uplink transmission.
  • the bit value of the second indication information is 0, it is used to indicate that the station is allowed to send a demand report frame for D2D transmission.
  • the bit value of the second indication information is 1, it is used to indicate that the station is allowed to send the demand report frame for uplink transmission.
  • bit value of the third indication information when the bit value of the third indication information is 00, it is used to indicate that the station is allowed to send a demand report frame for D2D transmission.
  • bit value of the second indication information when the bit value of the second indication information is 11, it is used to indicate that the station is allowed to send the demand report frame for uplink transmission.
  • bit value of the second indication information when the bit value of the second indication information is 11, it is used to indicate that the station is allowed to send a demand report frame for D2D transmission.
  • bit value of the second indication information when the bit value of the second indication information is 00, it is used to indicate that the station is allowed to send the demand report frame for uplink transmission.
  • the third indication information is in the 40th bit (B39) of the user information field of the buffer report trigger frame.
  • the reserved bits of the 802.11ax standard can be modified to carry the third indication information, which is beneficial to saving bits in the user information field.
  • the 40th bit (B39) of the user information field carries the third indication information.
  • the bit value of the third indication information is 1, it is used to indicate that the station is allowed to send a demand report frame for D2D transmission.
  • the bit value of the second indication information is 0, it is used to indicate that the station is allowed to send the demand report frame for uplink transmission.
  • FIG. 25 takes the bit value of the third indication information as 1 as an example.
  • the third indication information is in the 46th bit (B45) of the user information field of the buffer report trigger frame, that is, the third indication information is in the user information field related to the trigger type of the user information field of the buffer report trigger frame.
  • the sixth bit (B5) of dependent user info) is in the 46th bit (B45) of the user information field of the buffer report trigger frame.
  • the station can feed back the D2D transmission requirement to the access point, so that the access point can allocate D2D transmission resource units to the station.
  • the requirements reporting method described in the embodiments of the present application can also be implemented separately.
  • the demand reporting method described in the embodiment of the present application may be combined with the corresponding embodiment of the aforementioned D2D transmission method.
  • the site may be the sender of the D2D transmission in the processes described in Figure 2, Figure 11, Figure 15 and Figure 19 above. After the access point receives the demand report frame, it can perform the processes described in Figure 2, Figure 11, Figure 15 and Figure 19 above.
  • the embodiment of the present application also provides a link allocation method.
  • the link allocation method includes: the access point sends a link allocation frame for D2D transmission to a first station and a second station.
  • the link allocation frame includes the link identifier of D2D transmission, the identifier of the sender of D2D transmission, and the identifier of the receiver of D2D transmission.
  • D2D transmission may also be referred to as TDLS transmission.
  • the link allocation frame for D2D transmission may also be referred to as a TDLS link allocation frame (TDLS link allocation frame).
  • a value of a behavior field can be added to the TDLS action field (TDLS Action) of the IEEE 802.11 standard action frame (Action Frame).
  • TDLS Action TDLS Link Allocation
  • 11 represents TDLS Link Allocation (TDLS Link Allocation). That is, when the value of the TDLS behavior field is 11, the behavior frame is a TDLS link allocation frame (or called a link allocation frame for D2D transmission).
  • the TDLS link allocation frame includes the TDLS ID allocation field, which consists of a series of TDLS link allocation fields.
  • Each TDLS link allocation field contains three sub-fields: TDLS Link ID, TDLS sender ID and TDLS receiver ID (also called link ID of D2D transmission, sender ID of D2D transmission, and receiver ID of D2D transmission).
  • the access point may also send a first link allocation frame for D2D transmission to the first station, where the first link allocation frame includes a link identifier for D2D transmission and a sender identifier for D2D transmission.
  • the access point sends a second link allocation frame of D2D transmission to the second station, where the second link allocation frame includes the link identifier of the D2D transmission and the receiver identifier of the D2D transmission.
  • the access point can allocate D2D links to the first station and the second station.
  • the link allocation method described in the embodiment of the present application can be implemented separately.
  • the link allocation method described in the embodiment of the present application may be combined with the corresponding embodiment of the foregoing D2D transmission method.
  • the processes described in Figure 2, Figure 11, Figure 15, Figure 19, and Figure 23 can be executed.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the first station in the method embodiment described in FIG. 2 above.
  • the device may be the first site, a device in the first site, or a device that can be matched and used with the first site.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the communication unit 2701 is configured to receive a trigger frame sent by an access point, the trigger frame includes a user information field; the user information field includes the identification of the communication device, resource allocation information, first indication information, and second indication information.
  • the first indication information is used to indicate that the resource unit indicated by the resource allocation information is used for device-to-device D2D transmission
  • the second indication information is used to indicate that the communication device is the sender or receiver of the D2D transmission
  • the communication unit 2701 It is also used to send data to the second station on the D2D transmission resource unit indicated by the first resource allocation information.
  • the user information field includes 48 bits.
  • the first indication information is in the 40th bit of the user information field.
  • the second indication information is in the 46th bit of the user information field.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the access point in the method embodiment described in FIG. 2 above.
  • the device can be an access point, or a device in the access point, or a device that can be used with the access point.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the processing unit 2702 is configured to generate a trigger frame, the trigger frame includes a user information field; the user information field includes site identification, resource allocation information, first indication information, and second indication information.
  • the first indication information is used to indicate The resource unit indicated by the resource allocation information is used for device-to-device D2D transmission, and the second indication information is used for indicating that the station is the sender or receiver of the D2D transmission; the communication unit 2701 is used for sending a trigger frame.
  • the user information field includes 48 bits.
  • the first indication information is in the 40th bit of the user information field.
  • the second indication information is in the 46th bit of the user information field.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the first station in the method embodiment described in FIG. 11.
  • the device may be the first site, a device in the first site, or a device that can be matched and used with the first site.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the communication unit 2701 is configured to receive a trigger frame sent by an access point.
  • the trigger frame includes a user information field.
  • the user information field includes the identification of the communication device, resource allocation information, first indication information, and first identification information.
  • the communication device Is the sender of D2D transmission, the first indication information is used to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission, the first identification information is the identifier of the second station, and the second station is the receiving of D2D transmission Or the first identification information is a link identification for D2D transmission; the communication unit 2701 is further configured to send data to the second station on the D2D transmission resource unit indicated by the resource allocation information.
  • the processing unit 2702 determines that the second station is the receiver of the D2D transmission based on the link identification of the D2D transmission. After determining that the second station is the receiver of the D2D transmission, the processing unit 2702 sends data to the second station on the D2D transmission resource unit indicated by the resource allocation information.
  • the first identification information may be a partial identification or a complete identification of the second site.
  • the user information field of the trigger frame includes 48 bits.
  • the first indication information is in the 40th bit (B39) of the user information field; or the first indication information is in the 12th bit (B11) of the user information field; or the first indication information is in the user information field.
  • the 46th bit (B45) of the information field that is, the 6th bit (B5) of the trigger-dependent user information field (trigger dependent user info) in the first user information field where the first indication information is located.
  • the first identification information is in the 33rd bit (B32) to the 39th bit (B38) of the user information field.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the second station in the method embodiment described in FIG. 11.
  • the device may be a second site, a device in the second site, or a device that can be matched and used with the second site.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the communication unit 2701 is configured to receive a trigger frame sent by an access point.
  • the trigger frame includes a user information field.
  • the user information field includes the identification of the first station, resource allocation information, first indication information, and first identification information.
  • a site is the sender of D2D transmission
  • the first indication information is used to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission
  • the first identification information is the identifier of the communication device, which is the receiving device of D2D transmission Or the first identification information is a link identification for D2D transmission;
  • the communication unit 2701 is further configured to receive data sent by the first station in the D2D transmission resource unit allocated by the resource allocation information.
  • the processing unit 2702 determines that the communication device is the receiver of the D2D transmission based on the link identification of the D2D transmission. After determining that the communication device is the receiver of the D2D transmission, the processing unit 2702 receives the data sent by the first station on the D2D transmission resource unit indicated by the resource allocation information.
  • the first identification information may be a partial identification or a complete identification of the second site.
  • the user information field of the trigger frame includes 48 bits.
  • the first indication information is in the 40th bit (B39) of the user information field; or the first indication information is in the 12th bit (B11) of the user information field; or the first indication information is in the user information field.
  • the 46th bit (B45) of the information field that is, the 6th bit (B5) of the trigger-dependent user information field (trigger dependent user info) in the first user information field where the first indication information is located.
  • the first identification information is in the 33rd bit (B32) to the 39th bit (B38) of the user information field.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the access point in the method embodiment described in FIG. 11.
  • the device can be an access point, or a device in the access point, or a device that can be used with the access point.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the processing unit 2702 is configured to generate a trigger frame.
  • the trigger frame includes a user information field.
  • the user information field includes the identification of the first site, resource allocation information, first indication information, and first identification information.
  • the first site is D2D
  • the sender of the transmission the first indication information is used to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission
  • the first identification information is the identifier of the communication device
  • the communication device is the receiver of the D2D transmission
  • the first identification information is the link identification of the D2D transmission
  • the communication unit 2701 is configured to send the trigger frame.
  • the first identification information may be a partial identification or a complete identification of the second site.
  • the user information field of the trigger frame includes 48 bits.
  • the first indication information is in the 40th bit (B39) of the user information field; or the first indication information is in the 12th bit (B11) of the user information field; or the first indication information is in the user information field.
  • the 46th bit (B45) of the information field that is, the 6th bit (B5) of the trigger-dependent user information field (trigger dependent user info) in the first user information field where the first indication information is located.
  • the first identification information is in the 33rd bit (B32) to the 39th bit (B38) of the user information field.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the first station in the method embodiment described in FIG. 15.
  • the device may be the first site, a device in the first site, or a device that can be matched and used with the first site.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the communication unit 2701 is configured to receive a trigger frame sent by an access point.
  • the user information field of the trigger frame includes a link identifier for D2D transmission and resource allocation information for D2D transmission; a processing unit 2702 is used for a link based on D2D transmission
  • the identification determines that the communication device is the sender of the D2D transmission link, and the second station is the receiver of the D2D transmission link; the communication unit 2701 is also configured to send to the second station on the D2D transmission resource unit indicated by the resource allocation information data.
  • the user information field of the trigger frame includes 48 bits.
  • the link identifier of the D2D transmission is in the first bit (B0) to the twelfth bit (B11) of the user information field.
  • the user information field further includes first indication information, where the first indication information is used to indicate that the resource allocated by the resource allocation information is used for D2D transmission.
  • the first indication information may be in the first bit (B0) to the twelfth bit (B11) of the user information field, and the link identifier for D2D transmission is in the 33rd bit (B32) to the user information field.
  • the 39th bit (B38), or the link identifier of the D2D transmission is in the 33rd bit (B32) to the 40th bit (B39) of the user information field.
  • the value of the first indication information may be any one of 2008-2044 and 2047-4094.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the second station in the method embodiment described in FIG. 15.
  • the device may be a second site, a device in the second site, or a device that can be matched and used with the second site.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the communication unit 2701 is configured to receive a trigger frame sent by the access point.
  • the user information field of the trigger frame includes the link identifier of D2D transmission and the resource allocation information of D2D transmission;
  • the processing unit 2702 is configured to be based on the link of D2D transmission The identifier determines that the second station is the receiver of the D2D transmission link;
  • the communication unit 2701 is further configured to receive the data sent by the first station in the D2D transmission resource unit indicated by the resource allocation information.
  • the user information field of the trigger frame includes 48 bits.
  • the link identifier of the D2D transmission is in the first bit (B0) to the twelfth bit (B11) of the user information field.
  • the user information field further includes first indication information, where the first indication information is used to indicate that the resource allocated by the resource allocation information is used for D2D transmission.
  • the first indication information may be in the first bit (B0) to the twelfth bit (B11) of the user information field, and the link identifier for D2D transmission is in the 33rd bit (B32) to the user information field.
  • the 39th bit (B38), or the link identifier of the D2D transmission is in the 33rd bit (B32) to the 40th bit (B39) of the user information field.
  • the value of the first indication information may be any one of 2008-2044 and 2047-4094.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the access point in the method embodiment described in FIG. 15.
  • the device can be an access point, or a device in the access point, or a device that can be used with the access point.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the processing unit 2702 is configured to generate a trigger frame, and the user information field of the trigger frame includes the link identifier of the D2D transmission and the resource allocation information of the D2D transmission; the communication unit 2701 is configured to send the trigger frame.
  • the user information field of the trigger frame includes 48 bits.
  • the link identifier of the D2D transmission is in the first bit (B0) to the twelfth bit (B11) of the user information field.
  • the user information field further includes first indication information, where the first indication information is used to indicate that the resource unit indicated by the resource allocation information is used for D2D transmission.
  • the first indication information may be in the first bit (B0) to the twelfth bit (B11) of the user information field, and the link identifier for D2D transmission is in the 33rd bit (B32) to the user information field.
  • the 39th bit (B38), or the link identifier of the D2D transmission is in the 33rd bit (B32) to the 40th bit (B39) of the user information field.
  • the value of the first indication information may be any one of 2008-2044 and 2047-4094.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the first station in the method embodiment described in FIG. 19.
  • the device may be the first site, a device in the first site, or a device that can be matched and used with the first site.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the communication unit 2701 is configured to receive a downlink PPDU sent by an access point, the preamble of the downlink PPDU carries resource allocation information and a link identifier for D2D transmission, and the resource allocation information is used to indicate a resource unit for D2D transmission; processing unit 2702 , Used for determining that the communication device is the sender of the D2D transmission link based on the link identifier of the D2D transmission, and determining that the second station is the receiver of the D2D transmission link; the communication unit 2701 is also used for the D2D The transmission resource unit sends data to the second station.
  • the preamble further includes first indication information, the first indication information indicating that the resources allocated by the resource allocation information are used for D2D transmission.
  • the first indication information is in the first bit (B0) to the eleventh bit (B10) of the user domain of the preamble.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the second station in the method embodiment described in FIG. 19.
  • the device may be a second site, a device in the second site, or a device that can be matched and used with the second site.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the communication unit 2701 is configured to receive a downlink PPDU sent by an access point, the preamble of the downlink PPDU carries resource allocation information and a link identifier for D2D transmission, and the resource allocation information is used to indicate a resource unit for D2D transmission; processing unit 2702 , Used to determine that the communication device is the receiver of the D2D transmission link based on the link identifier of the D2D transmission; the communication unit 2701 is also used to receive the data sent by the first station in the D2D transmission resource unit allocated by the resource allocation information.
  • the preamble further includes first indication information, the first indication information indicating that the resource unit indicated by the resource allocation information is used for D2D transmission.
  • the first indication information is in the first bit (B0) to the eleventh bit (B10) of the user domain of the preamble.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the access point in the method embodiment described in FIG. 19.
  • the device can be an access point, or a device in the access point, or a device that can be used with the access point.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the processing unit 2702 is used to generate a downlink PPDU.
  • the preamble of the downlink PPDU carries resource allocation information and a link identifier for D2D transmission.
  • the resource allocation information is used to indicate the resource unit of D2D transmission; the communication unit 2701 is used to send the Downlink PPDU.
  • the preamble further includes first indication information, the first indication information indicating that the resource unit indicated by the resource allocation information is used for D2D transmission.
  • the first indication information is in the first bit (B0) to the eleventh bit (B10) of the user domain of the preamble.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the station in the method embodiment described in FIG. 23.
  • the device can be a site, a device in the site, or a device that can be used in conjunction with the site.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the processing unit 2702 is configured to generate a demand report frame, and the demand report frame is used to indicate that the communication device has a demand for D2D transmission; the communication unit 2701 is configured to send a demand report frame to the access point.
  • the demand report frame includes demand report information
  • the demand report information includes one or more of the following information: the identifier of the recipient of the D2D transmission, and information used to determine the size of the D2D transmission traffic , D2D transmission service type.
  • the demand report information is carried in the control information field of the high-efficiency control HE-control field of the demand report frame.
  • the demand report frame further includes a control identifier, and the control identifier is used to indicate that the control information field carries demand report information for D2D transmission.
  • control identifier is carried in the control identifier field of the HE-control field of the high-efficiency control HE-control field of the demand report frame.
  • the communication unit 2701 is further configured to receive a demand report trigger frame sent by the access point before the processing unit 2702 generates a demand report frame, where the demand report trigger frame is a buffer report trigger frame.
  • the buffer report trigger frame includes third indication information, and the third indication information is used to indicate that the communication device is allowed to send the demand report frame for D2D transmission.
  • the third indication information is in the 40th bit (B39) of the user information field of the buffer report trigger frame.
  • the communication device may be implemented alone or may also implement the above-mentioned function for implementing the D2D sender in the above-mentioned D2D transmission method.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the access point in the method embodiment described in FIG. 23.
  • the device can be an access point, or a device in the access point, or a device that can be used with the access point.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the communication unit 2701 is configured to receive a demand report frame, where the demand report frame is used to indicate that the station has a demand for D2D transmission.
  • the processing unit 2702 is configured to generate a trigger frame after the communication unit 2701 receives the demand report frame sent by the station, and the trigger frame is used to trigger the station to perform D2D transmission.
  • the demand report frame includes demand report information
  • the demand report information includes one or more of the following information: the identifier of the recipient of the D2D transmission, and information used to determine the size of the D2D transmission traffic , D2D transmission service type.
  • the demand report information is carried in the control information field of the high-efficiency control HE-control field of the demand report frame.
  • the demand report frame further includes a control identifier, and the control identifier is used to indicate that the control information field carries demand report information for D2D transmission.
  • control identifier is carried in the control identifier field of the HE-control field of the high-efficiency control HE-control field of the demand report frame.
  • the communication unit 2701 is further configured to send a demand report trigger frame to the station before receiving the demand report frame, where the demand report trigger frame is a buffer report trigger frame.
  • the buffer report trigger frame includes third indication information, and the third indication information is used to indicate that the station is allowed to send a demand report frame for D2D transmission.
  • the third indication information is in the 40th bit (B39) of the user information field of the buffer report trigger frame.
  • the communication device may be implemented alone or may also implement the above-mentioned function for implementing the access point in the above-mentioned D2D transmission method.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the first station or the second station in the foregoing link allocation method.
  • the device may be the first site, the device in the first site or the second site, or a device that can be matched and used with the first site or the second site.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the communication unit 2701 is configured to receive a link allocation frame for D2D transmission sent by an access point, where the link allocation frame includes a link identifier for D2D transmission, a sender identifier for D2D transmission, and a receiver identifier for D2D transmission.
  • the communication device can implement alone or can also implement the above-mentioned functions of the sender or receiver of D2D transmission in the above-mentioned D2D transmission method.
  • FIG. 27 shows a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication device shown in FIG. 27 may be used to perform part or all of the functions of the access point in the above-mentioned link allocation method.
  • the device can be an access point, or a device in the access point, or a device that can be used with the access point.
  • the communication device may also be a chip system.
  • the communication device shown in FIG. 27 may include a communication unit 2701 and a processing unit 2702.
  • the communication unit may also be referred to as a transceiving unit, or the communication unit includes a receiving unit and a sending unit.
  • the processing unit 2702 is used for data processing. among them:
  • the communication unit 2701 is configured to send a link allocation frame for D2D transmission to the first station and the second station.
  • the link allocation frame includes a link identifier for D2D transmission, a sender identifier for D2D transmission, and a receiver identifier for D2D transmission.
  • the communication device may be implemented alone or may also implement the above-mentioned function for implementing the access point in the above-mentioned D2D transmission method.
  • a communication device 280 provided by an embodiment of this application is used to implement the function of a station or an access point in the method embodiment described in FIG. 2 or FIG. 23; or, to implement the above-mentioned FIG. 11 ,
  • the function of the first station, the second station or the access point in the method embodiment described in FIG. 15 or FIG. 19; the device may be a station, the first station, the second station or an access point, or the device may be A device for a site, a device for a first site, a device for a second site, or a device for an access point.
  • the device used in the site may be a chip system or a chip in the site.
  • the device used in the first site may be a chip system or a chip in the first site.
  • the device used in the second site may be a chip system or a chip in the second site.
  • the device used for the access point may be a chip system or a chip in the access point.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • the communication device 280 includes at least one processor 2820, configured to implement the data processing function of the station, the first station, the second station, or the access point in the above D2D transmission method of this application. Or it is used to realize the data processing function of the station or the access point in the above-mentioned demand reporting method of this application. Or it is used to realize the data processing function of the first station, the second station or the access point in the above-mentioned link allocation method of this application.
  • the device 280 may further include a communication interface 2810, which is used to implement the receiving and sending operations of the station, the first station, the second station, or the access point in the above-mentioned D2D transmission method of this application. Or it is used to implement the receiving and sending operations of the station or the access point in the above-mentioned demand reporting method of this application. Or used to implement the receiving and sending operations of the first station, the second station, or the access point in the link allocation method described above in this application.
  • a communication interface 2810 which is used to implement the receiving and sending operations of the station, the first station, the second station, or the access point in the above-mentioned D2D transmission method of this application. Or it is used to implement the receiving and sending operations of the station or the access point in the above-mentioned demand reporting method of this application. Or used to implement the receiving and sending operations of the first station, the second station, or the access point in the link allocation method described above in this application.
  • the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface, which is used to communicate with other devices through a transmission medium.
  • the communication interface 2810 is used for the device in the device 280 to communicate with other devices.
  • the processor 2820 uses the communication interface 2810 to send and receive data, and is used to implement the method described in the foregoing method embodiment.
  • the device 280 may also include at least one memory 2830 for storing program instructions and/or data.
  • the memory 2830 and the processor 2820 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, and may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 2820 may operate in cooperation with the memory 2830.
  • the processor 2820 may execute program instructions stored in the memory 2830. At least one of the at least one memory may be included in the processor.
  • the embodiment of the present application does not limit the specific connection medium between the aforementioned communication interface 2810, the processor 2820, and the memory 2830.
  • the memory 2830, the communication interface 2820, and the communication interface 2810 are connected by a bus 2840.
  • the bus is represented by a thick line in FIG. 28a.
  • the connection mode between other components is only for schematic illustration. , Is not limited.
  • the bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used in FIG. 28a, but it does not mean that there is only one bus or one type of bus.
  • the communication interface 2810 may output or receive a baseband signal.
  • the output or reception of the communication interface 2810 may be a radio frequency signal.
  • the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and may implement or Perform the methods, steps, and logic block diagrams disclosed in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • FIG. 28b is a schematic structural diagram of another site 2800 provided in an embodiment of this application.
  • the site can perform the operations performed by the site in Figure 2 or Figure 23, or can perform the operations performed by the first site in Figure 11, Figure 15, or Figure 19, or the site can perform the operations performed by the site in Figure 11, Figure 15, or Figure 11 above. Operations performed by the second site in 19.
  • the site 2800 includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the entire site, execute software programs, and process the data of the software programs.
  • it is used to support the site to execute the first site in the process described in Figure 2 or Figure 23.
  • the operation performed, or the support site performs the operation performed by the first site in the process described in Figure 11, Figure 15, or Figure 19, or the support site performs the process described in Figure 11, Figure 15, or Figure 19 above
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • the site 2800 may also include input and output devices, such as a touch screen, a display screen, a keyboard, etc., which are mainly used to receive data input by the user and output data to the user. It should be noted that some types of sites may not have input and output devices.
  • the processor can read the software program in the storage unit, interpret and execute the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 28b shows only one memory and a processor. In an actual site, there can be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.
  • the processor may include a baseband processor and a central processing unit (CPU).
  • the baseband processor is mainly used to process communication protocols and communication data, and the CPU is mainly used to process the entire site. Perform control, execute software programs, and process data in software programs.
  • the processor may also be a network processor (network processor, NP) or a combination of CPU and NP.
  • the processor may further include a hardware chip.
  • the above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.
  • the memory may include volatile memory (volatile memory), such as random-access memory (RAM); the memory may also include non-volatile memory (non-volatile memory), such as flash memory (flash memory) , A hard disk drive (HDD) or a solid-state drive (solid-state drive, SSD); the memory may also include a combination of the foregoing types of memory.
  • the antenna and radio frequency circuit with the transceiver function can be regarded as the communication unit 2801 of the site 2800, and the processor with the processing function can be regarded as the processing unit of the site 2800. 2802.
  • the communication unit 2801 may also be referred to as a transceiver, a transceiver, a transceiving device, a transceiving unit, etc., for implementing transceiving functions.
  • the device for implementing the receiving function in the communication unit 2801 can be regarded as the receiving unit, and the device for implementing the sending function in the communication unit 2801 as the sending unit, that is, the communication unit 2801 includes a receiving unit and a sending unit.
  • the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc.
  • the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the communication unit 2801 and the processing unit 2802 may be integrated into one device or separated into different devices.
  • the processor and the memory may also be integrated into one device or separate into different devices.
  • the communication unit 2801 may be used to perform the receiving and sending operations of the station, the first station, or the second station in the foregoing method embodiment.
  • the processing unit 2802 may be used to perform data processing operations of the site, the first site, or the second site in the foregoing method embodiment.
  • the embodiments of the present application also provide a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when they run on a processor, they are used to execute the method executed by the site in the foregoing method embodiment.
  • the embodiments of the present application also provide a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when running on a processor, they are used to execute the method executed by the access point in the foregoing method embodiment.
  • the embodiments of the present application also provide a computer program product, when the computer program product runs on a processor, it is used to execute the method executed by the site in the foregoing method embodiment.
  • the embodiment of the present application also provides a computer program product, when the computer program product runs on a processor, it is used to execute the method executed by the access point in the foregoing method embodiment.

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  • Mobile Radio Communication Systems (AREA)

Abstract

本申请公开了一种D2D传输方法及通信装置，该方法包括：站点接收接入点发送的触发帧，触发帧包括用户信息字段；用户信息字段中包括站点的标识、资源分配信息、第一指示信息和第二指示信息，第一指示信息用于指示资源分配信息所指示的资源单元用于设备到设备D2D传输，第二指示信息用于指示站点为D2D传输的发送方或接收方；站点在资源分配信息指示的资源单元上进行D2D传输。基于本申请所描述的方法，能够在WiFi系统中实现D2D传输。

Description

一种设备到设备D2D传输方法及通信装置
本申请要求于2020年1月7日提交中国国家知识产权局、申请号为202010015812.9、申请名称为“一种设备到设备D2D传输方法及通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，尤其涉及一种设备到设备D2D传输方法及通信装置。
背景技术
电气与电子工程师协会(institute of electrical and electronic engineers，IEEE)组织在无线局域网(wireless local area network，WLAN)标准802.11ax中引入了正交频分多址(orthogonal frequencydivision multiple access，OFDMA)的上行传输。WLAN中基于OFDMA的上行传输流程为：接入点(access point，AP)在竞争到信道资源之后发送触发帧(trigger frame，TF)。触发帧指示若干资源单元(resource unit，RU)，该资源单元用于分配给指定的非接入点类的站点(none access point station，non-AP STA)进行上行传输或者上行随机接入。non-AP STA接收该触发帧之后，在对应的RU上以OFDMA的方式传输上行数据。AP接收上行数据之后，向所有传输上行数据的non-AP STA发送块确认帧(block ACK，BA)。
下一代无线网络需要支持实时性交互业务，例如无线远程控制、无线投屏、直连打印、虚拟现实和增强现实等。因此需要迫切在无线保真(wireless fidelity，WiFi)系统中实现D2D传输。设备到设备(device-to-device，D2D)传输是指两个non-AP STA之间不经过AP的中转而直接传输数据的传输方式。如何在WiFi系统中实现D2D传输是目前亟待解决的问题。
发明内容
本申请提供了一种设备到设备D2D传输方法及通信装置，能够在WiFi系统中实现D2D传输。
第一方面，本申请提供一种D2D传输方法，该方法包括：站点接收接入点发送的触发帧，该触发帧包括用户信息字段；用户信息字段中包括站点的标识、资源分配信息、第一指示信息和第二指示信息，该第一指示信息用于指示资源分配信息所指示的资源单元用于设备到设备D2D传输，该第二指示信息用于指示站点为D2D传输的发送方或接收方；站点在资源分配信息指示的资源单元上进行D2D传输。基于第一方面所描述的方法，能够在WiFi系统中实现D2D传输。
在一种可能的实现中用户信息字段包括48个比特。基于该可能的实现方式，有利于提高系统兼容性。该可能的实现方式还可应用于下述第二方面中，在第二方面中不再赘述。
在一种可能的实现中，第一指示信息处于用户信息字段的第40个比特。基于该可能的实现方式，能够将802.11ax标准的预留位修改为用于携带第一指示信息，这样可以避免 在用户信息字段中增加新的比特用以携带第一指示信息，有利于节省用户信息字段的比特。该可能的实现方式还可应用于下述第二方面中，在第二方面中不再赘述。
在一种可能的实现中，第二指示信息处于用户信息字段的第46个比特。基于该可能的实现方式，能够将802.11ax标准的预留位修改为用于携带第二指示信息，这样可以避免在用户信息字段中增加新的比特用以携带第二指示信息，有利于节省用户信息字段的比特。该可能的实现方式还可应用于下述第二方面中，在第二方面中不再赘述。
第二方面，本申请提供一种D2D传输方法，该方法包括：接入点生成触发帧，该触发帧包括用户信息字段；用户信息字段中包括站点的标识、资源分配信息、第一指示信息和第二指示信息，该第一指示信息用于指示资源分配信息所指示的资源单元用于设备到设备D2D传输，该第二指示信息用于指示站点为D2D传输的发送方或接收方；接入点发送触发帧。基于第二方面所描述的方法，能够在WiFi系统中实现D2D传输。
第三方面，本申请提供一种D2D传输方法，该方法包括：第一站点接收接入点发送的触发帧，该触发帧包括用户信息字段，该用户信息字段中包括第一站点的标识、资源分配信息、第一指示信息和第一标识信息，该第一站点为D2D传输的发送方，该第一指示信息用于指示该资源分配信息所指示的资源单元用于D2D传输；该第一标识信息为第二站点的标识，该第二站点为D2D传输的接收方，或，该第一标识信息为D2D传输的链路标识；第一站点在资源分配信息指示的D2D传输资源单元上向第二站点发送数据。如果第一标识信息为D2D传输的链路标识，第一站点接收触发帧之后，基于D2D传输的链路标识，确定第二站点为D2D传输的接收方。第一站点确定第二站点为D2D传输的接收方之后，在资源分配信息指示的资源单元上向第二站点发送数据。基于第三方面所描述的方法，能够在WiFi系统中实现D2D传输。
在一种可能的实现中，第一标识信息可以是第二站点的部分标识或完整的标识。
在一种可能的实现中，该触发帧的用户信息字段包括48个比特。基于该可能的实现方式，有利于提高系统兼容性。该可能的实现方式还可应用于下述第四方面和第五方面中，在第四方面和第五方面中不再赘述。
在一种可能的实现中，第一指示信息处于用户信息字段的第40个比特(B39)；或第一指示信息处于用户信息字段的第12个比特(B11)；或第一指示信息处于用户信息字段的第46个比特(B45)，即第一指示信息处于第一用户信息字段中的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)。基于该可能的实现方式，有利于节省用户信息字段的比特。该可能的实现方式还可应用于下述第四方面和第五方面中，在第四方面和第五方面中不再赘述。
在一种可能的实现中，第一标识信息处于用户信息字段的第33个比特(B32)～第39个比特(B38)中。基于该可能的实现方式，在D2D传输中，可以复用用户信息字段的UL Target RSSI子字段(B32-B38)携带第一标识信息，有利于节省用户信息字段的比特。该可能的实现方式还可应用于下述第四方面和第五方面中，在第四方面和第五方面中不再赘述。
第四方面，本申请提供一种D2D传输方法，该方法包括：第二站点接收接入点发送的触发帧，该触发帧包括用户信息字段，该用户信息字段中包括第一站点的标识、资源分配信息、第一指示信息和第一标识信息，该第一站点为D2D传输的发送方，该第一指示信息用于指示该资源分配信息所指示的资源单元用于D2D传输；该第一标识信息为第二站点 的标识，该第二站点为D2D传输的接收方，或，该第一标识信息为D2D传输的链路标识；第一站点在资源分配信息分配的D2D传输资源单元接收第一站点发送的数据。如果第一标识信息为D2D传输的链路标识，第二站点接收触发帧之后，基于D2D传输的链路标识，确定第二站点为D2D传输的接收方。第二站点确定第二站点为D2D传输的接收方之后，在资源分配信息指示的资源单元上接收第一站点发送的数据。基于第四方面所描述的方法，能够在WiFi系统中实现D2D传输。
第五方面，本申请提供一种D2D传输方法，该方法包括：接入点生成触发帧，该触发帧包括用户信息字段，该用户信息字段中包括第一站点的标识、资源分配信息、第一指示信息和第一标识信息，该第一站点为D2D传输的发送方，该第一指示信息用于指示该资源分配信息所指示的资源单元用于D2D传输；该第一标识信息为第二站点的标识，该第二站点为D2D传输的接收方，或，该第一标识信息为D2D传输的链路标识；接入点发送该触发帧。基于第五方面所描述的方法，能够在WiFi系统中实现D2D传输。
第六方面，本申请提供一种D2D传输方法，该方法包括：第一站点接收接入点发送的触发帧，该触发帧的用户信息字段中包括D2D传输的链路标识和D2D传输的资源分配信息；第一站点基于D2D传输的链路标识确定第一站点为D2D传输链路的发送方，以及确定第二站点为D2D传输链路的接收方；第一站点在资源分配信息指示的D2D传输资源单元上向第二站点发送数据。基于第六方面所描述的方法，能够在WiFi系统中实现D2D传输。
在一种可能的实现中，该触发帧的用户信息字段包括48个比特。基于该可能的实现方式，有利于提高系统兼容性。该可能的实现方式还可应用于下述第七方面和第八方面中，在第七方面和第八方面中不再赘述。
在一种可能的实现中，D2D传输的链路标识处于用户信息字段的第1个比特(B0)～第12个比特(B11)。基于该可能的实现方式，在D2D传输中，可以复用用户字段中的AID12子字段(B0-B11)携带D2D传输的链路标识，有利于节省用户信息字段的比特。该可能的实现方式还可应用于下述第七方面和第八方面中，在第七方面和第八方面中不再赘述。
在一种可能的实现中，D2D传输的链路标识处于用户信息字段的第1个比特(B0)～第12个比特(B11)时，D2D传输的链路标识与接入点关联的任意一个站点的标识不相同，这样有利于避免站点将D2D传输的链路标识解读为站点的标识。该可能的实现方式还可应用于下述第七方面和第八方面中，在第七方面和第八方面中不再赘述。
在一种可能的实现中，用户信息字段中还包括第一指示信息，该第一指示信息用于指示资源分配信息所指示的资源单元用于D2D传输。基于该可能的实现方式，有利于站点区分用户信息字段中指示的资源单元用于D2D传输还是上行传输。该可能的实现方式还可应用于下述第七方面和第八方面中，在第七方面和第八方面中不再赘述。
在一种可能的实现中，该第一指示信息可以处于用户信息字段的第1个比特(B0)～第12个比特(B11)。基于该可能的实现方式，在D2D传输中，可以复用用户字段中的AID12子字段(B0-B11)携带第一指示信息，有利于节省用户信息字段的比特。该可能的实现方式还可应用于下述第七方面和第八方面中，在第七方面和第八方面中不再赘述。
在一种可能的实现中，该第一指示信息可以处于用户信息字段的第1个比特(B0)～第12个比特(B11)时，D2D传输的链路标识处于用户信息字段的第33个比特(B32)～ 第39个比特(B38)，或D2D传输的链路标识处于用户信息字段的第33个比特(B32)～第40个比特(B39)。基于该可能的实现方式，在D2D传输中，可以复用用户信息字段的UL Target RSSI子字段(B32-B38)携带D2D传输的链路标识，有利于节省用户信息字段的比特。该可能的实现方式还可应用于下述第七方面和第八方面中，在第七方面和第八方面中不再赘述。
在一种可能的实现中，该第一指示信息用于指示资源分配信息所指示的资源单元用于D2D传输时，第一指示信息位于AID11子字段(B0-B10)或AID12子字段(B0-B11)，其可以为特殊值，例如，可以为2008～2044，2047～4094中的任意一个以指示该资源分配信息所指示的资源单元用于D2D传输。
第七方面，本申请提供一种D2D传输方法，该方法包括：第二站点接收接入点发送的触发帧，该触发帧的用户信息字段中包括D2D传输的链路标识和D2D传输的资源分配信息；第二站点基于D2D传输的链路标识确定第二站点为D2D传输链路的接收方；第二站点在资源分配信息指示的D2D传输资源单元接收第一站点发送的数据。基于第七方面所描述的方法，能够在WiFi系统中实现D2D传输。
第八方面，本申请提供一种D2D传输方法，该方法包括：接入点生成触发帧，该触发帧的用户信息字段中包括D2D传输的链路标识和D2D传输的资源分配信息；接入点发送该触发帧。基于第八方面所描述的方法，能够在WiFi系统中实现D2D传输。
第九方面，本申请提供一种D2D传输方法，该方法包括：第一站点接收接入点发送的下行PPDU，该下行PPDU的前导码中携带资源分配信息和D2D传输的链路标识，该资源分配信息用于指示D2D传输的资源单元；第一站点基于D2D传输的链路标识确定第一站点为D2D传输链路的发送方，以及确定第二站点为D2D传输链路的接收方；第一站点在资源分配信息指示的D2D传输资源单元上向第二站点发送数据。基于第十方面所描述的方法，能够在WiFi系统中实现D2D传输。基于第九方面所描述的方法，能够在WiFi系统中实现D2D传输。
在一种可能的实现中，该前导码还包括第一指示信息，该第一指示信息指示资源分配信息所指示的资源单元用于D2D传输。基于该可能的实现方式，有利于站点区分用户信息字段中分配的资源单元用于D2D传输还是下行传输。该可能的实现方式还可应用于下述第十方面和第十一方面中，在第十方面和第十一方面中不再赘述。
在一种可能的实现中，该第一指示信息处于前导码的用户域的第1个比特(B0)～第11个比特(B10)。基于该可能的实现方式，有利于节省用户信息字段的比特。该可能的实现方式还可应用于下述第十方面和第十一方面中，在第十方面和第十一方面中不再赘述。
在一种可能的实现中，前导码的用户域的第12个比特(B11)～第21个比特(B20)携带D2D传输的链路标识。
第十方面，本申请提供一种D2D传输方法，该方法包括：第二站点接收接入点发送的下行PPDU，该下行PPDU的前导码中携带资源分配信息和D2D传输的链路标识，该资源分配信息用于指示D2D传输的资源单元；第二站点基于D2D传输的链路标识确定第二站点为D2D传输链路的接收方；第二站点在资源分配信息指示的D2D传输资源单元接收第一站点发送的数据。基于第十方面所描述的方法，能够在WiFi系统中实现D2D传输。
第十一方面，本申请提供一种D2D传输方法，该方法包括：接入点生成下行PPDU，该下行PPDU的前导码中携带资源分配信息和D2D传输的链路标识，该资源分配信息用 于指示D2D传输的资源单元；接入点发送该下行PPDU。基于第十一方面所描述的方法，能够在WiFi系统中实现D2D传输。
第十二方面，本申请提供一种需求汇报方法，该方法包括：站点生成需求汇报帧，该需求汇报帧用于指示站点有需求进行D2D传输；站点向接入点发送需求汇报帧。基于第十二方面所描述的方法，站点能够向接入点反馈D2D的传输需求，从而接入点能够为站点分配D2D传输资源。
在一种可能的实现中，需求汇报帧包括需求汇报信息，该需求汇报信息包括以下信息中的一项或多项：D2D传输的接收方的标识、用于确定D2D传输的业务量大小的信息、D2D传输的业务类型。基于该可能的实现方式，站点能够通知接入点D2D传输的接收方、D2D传输的业务量大小和D2D传输的业务类型。
在一种可能的实现中，该需求汇报信息承载于需求汇报帧的高效控制HE-control字段的控制信息字段中。
在一种可能的实现中，需求汇报帧还包括控制标识，该控制标识用于指示该控制信息字段携带D2D传输的需求汇报信息。基于该可能的实现方式，有利于接入点能够识别需求汇报帧的功能。
在一种可能的实现中，控制标识承载于需求汇报帧的高效控制HE-control字段的控制标识字段中。
在一种可能的实现中，站点还可接收接入点发送的需求汇报触发帧，该需求汇报触发帧为缓冲区上报触发帧。基于该可能的实现方式，接入点可通过已有的触发帧触发站点发送需求汇报帧，无需重新设计一个触发帧来触发站点发送需求汇报帧。
在一种可能的实现中，缓冲区上报触发帧中包括第三指示信息，该第三指示信息用于指示允许站点发送D2D传输的需求汇报帧。基于该可能的实现方式，只需对已有的触发帧触进行较小的更改，就可触发站点发送需求汇报帧。
在一种可能的实现中，第三指示信息处于缓冲区上报触发帧的用户信息字段的第40个比特。基于该可能的实现方式，能够将802.11ax标准的预留位修改为用于携带第三指示信息，有利于节省用户信息字段的比特。
第十二方面所描述的方法可与第一方面、第三方面、第六方面或第九方面所描述的方法相结合，或者，第十二方面所描述的方法也可单独实现。
第十三方面，本申请提供一种需求汇报方法，该方法包括：接入点接收站点发送的需求汇报帧，该需求汇报帧用于指示站点有需求进行D2D传输。可选的，接入点接收站点发送的需求汇报帧之后，生成触发帧，该触发帧用于触发站点进行D2D传输。
在一种可能的实现中，需求汇报帧还包括需求汇报信息，需求汇报信息包括以下信息中的一项或多项：D2D传输的接收方的标识、用于确定D2D传输的业务量大小的信息、D2D传输的业务类型。
在一种可能的实现中，需求汇报信息承载于需求汇报帧的高效控制HE-control字段的控制信息字段中。
在一种可能的实现中，需求汇报帧还包括控制标识，该控制标识用于指示该控制信息字段携带D2D传输的需求汇报信息。
在一种可能的实现中，控制标识承载于需求汇报帧的高效控制HE-control字段的控制标识字段中。
在一种可能的实现中，接入点还可向站点发送需求汇报触发帧，该需求汇报触发帧为缓冲区上报触发帧。
在一种可能的实现中，缓冲区上报触发帧中包括第三指示信息，该第三指示信息用于指示允许站点发送D2D传输的需求汇报信息。
在一种可能的实现中，第三指示信息处于缓冲区上报触发帧的用户信息字段中的第40个比特。
第十三方面的有益效果可参见第十三方面的有益效果，在此不赘述。第十三方面所描述的方法可与第三方面、第五方面、第八方面或第十一方面所描述的方法相结合，或者，第十三方面所描述的方法也可单独实现。
第十四方面，本申请提供一种链路分配方法，该方法包括：站点接收接入点发送的D2D传输的链路分配帧，该链路分配帧包括D2D传输的链路标识、D2D传输的发送方标识和D2D传输的接收方标识。基于第十四方面所描述的方法，接入点可以为站点分配D2D链路。第十五方面所描述的方法可与第一方面、第三方面、第四方面、第六方面、第七方面、第九方面、第十方面、第十二方面所描述的方法相结合，或者，第十四方面所描述的方法也可单独实现。
第十五方面，本申请提供一种D2D传输方法，该方法包括：接入点向站点发送D2D传输的链路分配帧，该链路分配帧包括D2D传输的链路标识、D2D传输的发送方标识和D2D传输的接收方标识。基于第十五方面所描述的方法，接入点可以为站点分配D2D链路。第十五方面所描述的方法可与第二方面、第五方面、第八方面、第十一方面、第十三方面所描述的方法相结合，或者，第十五方面所描述的方法也可单独实现。
第十六方面，提供了一种通信装置，该装置可以是站点，也可以是站点中的装置，或者是能够和站点匹配使用的装置。其中，该通信装置还可以为芯片系统。该通信装置可执行第一方面、第三方面、第四方面、第六方面、第七方面、第九方面、第十方面、第十二方面或第十四方面所述的方法。该通信装置的功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的单元。该单元可以是软件和/或硬件。该通信装置执行的操作及有益效果可以参见上述第一方面、第三方面、第四方面、第六方面、第七方面、第九方面、第十方面、第十二方面或第十四方面所述的方法以及有益效果，重复之处不再赘述。
第十七方面，提供了一种通信装置，该装置可以是接入点，也可以是接入点中的装置，或者是能够和接入点匹配使用的装置。其中，该通信装置还可以为芯片系统。该通信装置可执行第二方面、第五方面、第八方面、第十一方面、第十三方面或第十五方面所述的方法。该通信装置的功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的单元。该单元可以是软件和/或硬件。该通信装置执行的操作及有益效果可以参见上述第二方面、第五方面、第八方面、第十一方面、第十三方面或第十五方面所述的方法以及有益效果，重复之处不再赘述。
第十八方面，本申请提供一种通信装置，所述通信装置包括至少一个处理器，当所述处理器调用存储器中的计算机程序时，如第一方面、第三方面、第四方面、第六方面、第七方面、第九方面、第十方面、第十二方面或第十四方面所述的方法中站点执行的方法被执行。
第十九方面，本申请提供一种通信装置，所述通信装置包括至少一个处理器，当所述 处理器调用存储器中的计算机程序时，如第二方面、第五方面、第八方面、第十一方面、第十三方面或第十五方面所述的方法中接入点执行的方法被执行。
第二十方面，本申请提供一种通信装置，所述通信装置包括处理器和存储器，所述存储器用于存储计算机程序；所述处理器用于执行所述存储器所存储的计算机程序，以使所述通信装置执行如第一方面、第三方面、第四方面、第六方面、第七方面、第九方面、第十方面、第十二方面或第十四方面所述的方法中站点执行的方法。
第二十一方面，本申请提供一种通信装置，所述通信装置包括处理器和存储器，所述存储器用于存储计算机程序；所述处理器用于执行所述存储器所存储的计算机程序，以使所述通信装置执行第二方面、第五方面、第八方面、第十一方面、第十三方面或第十五方面所述的方法中接入点执行的方法。
第二十二方面，本申请提供一种通信装置，所述通信装置包括处理器、存储器和收发器，所述收发器，用于接收信号或者发送信号；所述存储器，用于存储计算机程序；所述处理器，用于从所述存储器调用所述计算机程序执行如第一方面、第三方面、第四方面、第六方面、第七方面、第九方面、第十方面、第十二方面或第十四方面所述的方法中站点执行的方法。
第二十三方面，本申请提供一种通信装置，所述通信装置包括处理器、存储器和收发器，所述收发器，用于接收信号或者发送信号；所述存储器，用于存储计算机程序；所述处理器，用于从所述存储器调用所述计算机程序执行如第二方面、第五方面、第八方面、第十一方面、第十三方面或第十五方面所述的方法中接入点执行的方法。
第二十四方面，本申请提供一种通信装置，所述通信装置包括至少一个处理器和通信接口，所述处理器运行计算机程序以执行如第一方面、第三方面、第四方面、第六方面、第七方面、第九方面、第十方面、第十二方面或第十四方面所述的方法中站点执行的方法。
第二十五方面，本申请提供一种通信装置，所述通信装置包括至少一个处理器和通信接口，所述通信接口，用于接收计算机程序并传输至所述处理器；所述处理器运行所述计算机程序以执行如第二方面、第五方面、第八方面、第十一方面、第十三方面或第十五方面所述的方法中接入点执行的方法。
第二十六方面，本申请提供一种计算机可读存储介质，所述计算机可读存储介质用于存储指令，当所述指令被执行时，使得如第一方面、第三方面、第四方面、第六方面、第七方面、第九方面、第十方面、第十二方面或第十四方面所述的方法中站点执行的方法被实现。
第二十七方面，本申请提供一种计算机可读存储介质，所述计算机可读存储介质用于存储指令，当所述指令被执行时，使得如第二方面、第五方面、第八方面、第十一方面、第十三方面或第十五方面所述的方法中接入点执行的方法被实现。
第二十八方面，本申请提供一种包括指令的计算机程序产品，当所述指令被执行时，使得如第一方面、第三方面、第四方面、第六方面、第七方面、第九方面、第十方面、第十二方面或第十四方面所述的方法中站点执行的方法被实现。
第二十九方面，本申请提供一种包括指令的计算机程序产品，当所述指令被执行时，使得如第二方面、第五方面、第八方面、第十一方面、第十三方面或第十五方面所述的方法中接入点执行的方法被实现。
第三十方面，本申请提供一种通信系统，该通信系统包括站点和接入点，该站点可执 行上述第一方面所述的方法和该接入点可执行上述第二方面所述的方法；或者，该通信系统包括可执行上述第三方面所述的方法的第一站点、可执行上述第四方面所述的方法的第二站点和可执行上述第五方面所述的方法的接入点；或者，该通信系统包括可执行上述第六方面所述的方法的第一站点、可执行上述第七方面所述的方法的第二站点和可执行上述第八方面所述的方法的接入点；或者，该通信系统包括可执行上述第九方面所述的方法的第一站点、可执行上述第十方面所述的方法的第二站点和可执行上述第十一方面所述的方法的接入点；或者，该通信系统包括可执行上述第十二方面所述的方法的第一站点和可执行上述第十三方面所述的方法的接入点；或者，该通信系统包括可执行上述第十四方面所述的方法的第一站点和可执行上述第十五方面所述的方法的接入点。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的一种系统架构的示意图；
图2是本申请实施例提供的一种D2D传输方法的流程示意图；
图3是本申请实施例提供的一种触发帧结构的示意图；
图4是本申请实施例提供的另一种触发帧结构的示意图；
图5是本申请实施例提供的又一种触发帧结构的示意图；
图6是本申请实施例提供的又一种触发帧结构的示意图；
图7是本申请实施例提供的又一种触发帧结构的示意图；
图8是本申请实施例提供的又一种第二站点回复BA帧的示意图；
图9是本申请实施例提供的另一种第二站点回复BA帧的示意图；
图10是本申请实施例提供的又一种第二站点回复BA帧的示意图；
图11是本申请实施例提供的另一种D2D传输方法的流程示意图；
图12是本申请实施例提供的又一种触发帧结构的示意图；
图13是本申请实施例提供的又一种触发帧结构的示意图；
图14是本申请实施例提供的又一种触发帧结构的示意图；
图15是本申请实施例提供的又一种D2D传输方法的流程示意图；
图16是本申请实施例提供的又一种触发帧结构的示意图；
图17是本申请实施例提供的又一种触发帧结构的示意图；
图18是本申请实施例提供的又一种触发帧结构的示意图；
图19是本申请实施例提供的又一种D2D传输方法的流程示意图；
图20是本申请实施例提供的又一种触发帧结构的示意图；
图21是本申请实施例提供的一种D2D传输方法的示意图；
图22是本申请实施例提供的又一种D2D传输方法的示意图；
图23是本申请实施例提供的一种需求汇报方法的流程示意图；
图24是本申请实施例提供的一种需求汇报帧的结构示意图；
图25是本申请实施例提供的一种需求汇报触发帧的结构示意图；
图26是本申请实施例提供的一种链路分配帧的结构示意图；
图27是本申请实施例提供的一种通信装置的结构示意图；
图28a是本申请实施例提供的另一种通信装置的结构示意图；
图28b是本申请实施例提供的又一种通信装置的结构示意图。
具体实施方式
下面结合附图对本申请具体实施例作进一步的详细描述。
为了能够在WiFi系统中实现D2D传输，本申请实施例提供了一种设备到设备D2D传输方法及通信装置。下面首先对本申请实施例可应用的系统架构进行说明：
请参见图1，图1是本申请实施例提供的一种系统架构的示意图。如图1所示，该系统架构包括接入点(access point，AP)和多个非接入点类的站点(none access point station，non-AP STA)。为便于描述，后文将非接入点类的站点简称为站点。图1以该系统架构包括一个接入点和三个站点为例进行说明。当然该系统架构中还可包括更多的接入点和站点。或者，该系统架构中也可以只包括两个站点。
其中，接入点可以为终端设备(如手机)进入有线(或无线)网络的接入点，主要部署于家庭、大楼内部以及园区内部，典型覆盖半径为几十米至上百米，当然，也可以部署于户外。接入点相当于一个连接有线网和无线网的桥梁，主要作用是将各个无线网络客户端连接到一起，然后将无线网络接入以太网。具体的，接入点可以是带有无线保真(wreless-fidelity，WiFi)芯片的终端设备(如手机)或者网络设备(如路由器)。接入点可以为支持802.11be制式的设备。接入点也可以为支持802.11ax、802.11ac、802.11n、802.11g、802.11b及802.11a等多种无线局域网(wireless local area networks，WLAN)制式的设备。
站点可以为无线通讯芯片、无线传感器或无线通信终端等。例如，站点可以为支持WiFi通讯功能的移动电话、支持WiFi通讯功能的平板电脑、支持WiFi通讯功能的机顶盒、支持WiFi通讯功能的智能电视、支持WiFi通讯功能的智能可穿戴设备、支持WiFi通讯功能的车载通信设备和支持WiFi通讯功能的计算机等等。可选地，站点可以支持802.11be制式。站点也可以支持802.11ax、802.11ac、802.11n、802.11g、802.11b及802.11a等多种无线局域网(wireless local area networks，WLAN)制式。
例如，接入点和站点可以是应用于车联网中设备，物联网中的物联网节点、传感器等，智慧家居中的智能摄像头，智能遥控器，智能水表电表等，以及智慧城市中的传感器等。
下面对本申请提供的D2D传输方法及通信装置进一步进行介绍：
请参见图2，图2是本申请实施例提供的一种D2D传输方法的流程示意图。该D2D传输方法应可用于WiFi系统中上行传输和D2D传输相结合的混合传输场景。如图2所示，该D2D传输方法包括如下步骤201～步骤203，图2所示的方法执行主体可以为接入点和站点。或者，图2所示的方法执行主体可以为接入点中的芯片和站点中的芯片。图2以接入点和站点为执行主体为例进行说明。
201、接入点生成触发帧(trigger frame，TF)。
其中，该触发帧包括用户信息(user info)字段。该用户信息字段中包括站点的标识、资源分配信息、第一指示信息和第二指示信息，该第一指示信息用于指示该资源分配信息所指示的资源单元用于D2D传输，该第二指示信息用于指示该站点为D2D传输的发送方或接收方。当然触发帧中还可包括其他字段，本申请实施例不做限定。本申请实施例中， D2D传输也可称为通道直接链路建立(Tunneled Direct Link Setup，TDLS)传输。
其中，站点的标识也可以称为站点的关联标识(Association Identifier，AID)。站点的标识可以为站点的MAC地址或基于站点的MAC地址生成的标识。
其中，资源分配信息用于为站点分配资源单元(resource unit，RU)，该资源分配信息处于用户信息字段的资源单元分配(RU allocation)字段中。
其中，第一指示信息可以为一个或多个比特。其中，第一指示信息也可称为传输类型指示信息。例如，第一指示信息为1bit，其比特值可以为1或0，当比特值为1时，指示资源分配信息所指示的资源单元用于D2D传输，当比特值为0时，指示资源分配信息所指示的资源单元用于上行传输；或者，比特值为0时，指示资源分配信息所指示的资源单元用于D2D传输，比特值为1时，指示资源分配信息所指示的资源单元用于上行传输。再如，第一指示信息包括2bits，其比特值可以为00或11，当比特值为00时，指示资源分配信息所指示的资源单元用于D2D传输；当比特值为11时，指示资源分配信息所指示的资源单元用于上行传输；或者，当比特值为11时，指示资源分配信息所指示的资源单元用于D2D传输；当比特值为00时，指示资源分配信息所指示的资源单元用于上行传输。可选的，第一指示信息也可以不指示资源分配信息所指示的资源单元用于上行传输。
其中，第二指示信息可以为一个或多个比特。其中，第二指示信息也可称为传输角色指示信息。例如，第二指示信息为1bit，其比特值为1或0，比特值为1，指示站点为D2D传输的发送方，比特值为0，指示站点为D2D传输的接收方；或者，比特值为0，指示站点为D2D传输的发送方，比特值为1，指示站点为D2D传输的接收方。再如，第二指示信息包括2bits，其比特值为00或11，比特值为00，指示站点为D2D传输的发送方，比特值为11，指示站点为D2D传输的接收方；或者，比特值为11，指示站点为D2D传输的发送方，比特值为00，指示站点为D2D传输的接收方。可选的，本申请实施例中，若第一指示信息用于指示资源分配信息所指示的资源单元用于上行传输，则触发帧中不携带第二指示信息。
在一种可能的实现中，用户信息字段包括48个比特。支持802.11ax标准的站点在接收触发帧后只解析用户信息字段的48个比特。如果将用户信息字段设置为大于48个比特，支持802.11ax标准的站点会无法正常解析用户信息字段。基于该可能的实现，所有的用户信息字段都是48bits，支持802.11ax的站点可以正常的解析该触发帧，可以将D2D传输与802.11ax站点的OFDMA上行传输或随机接入兼容。
在一种可能的实现中，第一指示信息处于用户信息字段的第40个比特(B39)。在802.11ax标准的触发帧结构的用户信息字段中，第40个比特(B39)为预留位。本申请实施例对该预留位进行了修改，将该预留位修改为用于携带第一指示信息，这样可以避免在用户信息字段中增加新的比特用以携带第一指示信息，有利于节省用户信息字段的比特。
在一种可能的实现中，第二指示信息处于用户信息字段的第46个比特(B45)。即第二指示信息处于用户信息字段中的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)。在802.11ax标准的触发帧结构的用户信息字段的第46个比特(B45)为预留位。本申请实施例对该预留位进行了修改，将该预留位修改为用于携带第二指示信息，这样可以避免在用户信息字段中增加新的比特用以携带第二指示信息，有利于节省用户信息字段的比特。可选的，若第一指示信息用于指示资源分配信息所指示的资源单元用于上行传输，则用户信息字段的第46个比特(B45)为预留位。
在一种可能的实现中，第一指示信息和第二指示信息也可以由一个字段指示。即由一个字段的值即指示资源分配信息所指示的资源单元用于D2D传输，又指示站点为D2D传输的发送方或接收方。例如，该字段的值为第一值时，指示资源分配信息所指示的资源单元用于D2D传输，且站点为D2D传输的发送方；该字段的值为第二值时，指示资源分配信息所指示的资源单元用于D2D传输，且站点为D2D传输的接收方；该字段的值为第三值时，指示资源分配信息所指示的资源单元用于上行传输。例如，第一值可以为00，第二值可以为01，第三值可以为10。
在一种可能的实现中，站点的标识处于用户信息字段的第1个比特(B0)至第12个比特(B11)。
在一种可能的实现中，资源分配信息处于用户信息字段的第13个比特(B12)至第20个比特(B19)。
举例来说，如图3所示，触发帧的用户信息字段包括48个比特。用户信息字段的第1个比特(B0)至第12个比特(B11)携带站点的标识。用户信息字段的第13个比特(B12)至第20个比特(B19)携带资源分配信息。用户信息字段的第40个比特(B39)携带第一指示信息。如果第一指示信息的比特值为1，用于指示资源分配信息分配的资源单元用于D2D传输。如果第一指示信息的比特值为0，用于指示资源分配信息分配的资源单元用于上行传输。当第一指示信息的比特值为0时，用户信息字段的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)为预留位。
当第一指示信息的比特值为1时，用户信息字段的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)携带第二指示信息。图3以第一指示信息的比特值为1为例。如果第二指示信息的比特值为1，用于指示站点为D2D传输的发送方。如果第二指示信息的比特值为0，用于指示站点为D2D传输的接收方。
在一种可能的实现中，第一指示信息处于用户信息字段中的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)。第二指示信息处于用户信息字段的第40个比特(B39)。即将图3中第一指示信息的比特位置和第二指示信息的比特位置进行交换。交换之后的触发帧结构如图4所示。
在一种可能的实现中，站点的标识处于用户信息字段的第1个比特(B0)至第11个比特(B10)。用户信息字段的第12个比特(B11)可以用于携带其他信息。例如，如图5所示，第一指示信息可以处于用户信息字段的第12个比特(B11)中。或者，如图6所示，第二指示信息可以处于用户信息字段的第12个比特(B11)中。
202、接入点发送触发帧。
本申请实施例中，接入点生成触发帧之后，可发送触发帧。例如，接入点可以广播触发帧给接入点下的站点。
203、站点在资源分配信息指示的传输资源单元上进行D2D传输。
本申请实施例中，站点接收接入点发送的触发帧之后，若站点为该D2D传输的发送方，则站点在资源分配信息指示的传输资源单元上向D2D传输的接收方发送数据。若站点为该D2D传输的接收方，则站点在资源分配信息指示的传输资源单元上接收D2D传输的发送方发送的数据。
下面以两个用户信息字段为例对本申请提供的D2D传输方法进一步进行介绍：
举例来说，如图7所示，触发帧包括帧控制(frame control)字段、时长(duration) 字段、接收地址(RA)字段、发送地址(TA)字段、公共信息(common info)字段、多个用户信息(user info)字段、填充(padding)字段和帧校验序列(FCS)字段。其中，该多个用户信息字段至少包括用户信息1(user info1)字段和用户信息2(user info2)字段。该触发帧中也可以只包括图7所示的部分字段，或触发帧中包括的字段也可以多于图7所示的字段。
如图7所示，用户信息1字段包括48个比特，用户信息2字段包括48个比特。用户信息1字段的第1个比特(B0)至第12个比特(B11)携带第一站点的标识。用户信息1字段的第13个比特(B12)至第20个比特(B19)携带资源分配信息1。用户信息1字段的第40个比特(B39)携带第一指示信息1。如果第一指示信息1的比特值为1，用于指示第一资源分配信息分配的资源单元用于D2D传输。如果第一指示信息的比特值为0，用于指示第一资源分配信息分配的资源单元用于上行传输。当第一指示信息的比特值为0时，用户信息1字段的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)为预留位。
当第一指示信息1的比特值为1时，用户信息1字段的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)携带第二指示信息1。如果第二指示信息1的比特值为1，用于指示第一站点为D2D传输的发送方。如果第二指示信息1的比特值为0，用于指示第一站点为D2D传输的接收方。图7以第一指示信息1的比特值为1，第二指示信息1的比特值为1为例。
如图7所示，用户信息2字段的第1个比特(B0)至第12个比特(B11)携带第二站点的标识。用户信息2字段的第13个比特(B12)至第20个比特(B19)携带资源分配信息2。用户信息2字段的第40个比特(B39)携带第一指示信息2。同理，如果第一指示信息2的比特值为1，用于指示资源分配信息2分配的资源单元用于D2D传输。如果第一指示信息2的比特值为0，用于指示资源分配信息2分配的资源单元用于上行传输。当第一指示信息2的比特值为1时，用户信息2字段的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)携带第二指示信息2。如果第二指示信息2的比特值为1，用于指示第二站点为D2D传输的发送方。如果第二指示信息2的比特值为0，用于指示第二站点为D2D传输的接收方。图7以第一指示信息2的比特值为1，第二指示信息2的比特值为0为例。
其中，资源分配信息1指示的资源单元与资源分配信息2指示的资源单元相同。或者，资源分配信息1指示的资源单元在频域上包括资源分配信息2指示的资源单元。第一站点接收触发帧之后，在资源分配信息1指示的资源单元向第二站点发送数据。第二站点接收触发帧之后，在资源分配信息2指示的资源单元接收第一站点发送的数据。
其中，上述图7中，用户信息1和用户信息2的功能相同，为便于区分，对用户信息进行编号描述。资源分配信息1和资源分配信息2、第一指示信息1和第一指示信息2、第二指示信息1和第二指示信息2同理。
在一种可能的实现中，第一站点和第二站点的用户信息字段相邻。第一站点和第二站点的用户信息字段中，可只有一个用户信息字段中具有资源分配信息。用户信息字段中不具有资源分配信息的站点可从另一个站点的用户信息字段中解析资源分配信息，得到用于D2D传输的资源单元。基于该可能的实现方式，能够节省用户信息字段的比特，从而可利用节省的比特携带其他参数，有利于携带更多的参数。
例如，用户信息1字段和用户信息2字段相邻，用户信息1字段在用户信息2字段之前。用户信息1字段携带第一站点的标识、资源分配信息1、第一指示信息1和第二指示信息1。用户信息2字段携带第二站点的标识。可选的，用户信息2字段中资源分配信息2、第一指示信息2和第二指示信息2所在比特可以设置为预留位，或者用于承载其他参数。第二站点接收触发帧之后，解析触发帧中的信息。在解析到用户信息2字段中的第二站点的标识之后，第二站点从与用户信息2字段相邻的用户信息1字段中解析资源分配信息1，以确定D2D传输资源。第二站点再在D2D传输资源单元上接收第一站点发送的数据。用户信息1字段在用户信息2字段之后同理，在此不赘述。
在一种可能的实现中，触发帧中还可包括用户信息3字段，该用户信息3字段用于为第三站点分配用于上行传输的资源单元。第三站点接收该触发帧之后，在分配的用于上行传输的资源单元上向接入点发送上行数据。接入点接收该上行数据之后，向第三站点发送确认帧(ACK帧)或块确认帧(BA帧)。如果接入点接收到多个站点发送的上行数据，接入点也可以向该多个站点发送多用户块确认帧(MBA)。
在一种可能的实现中，第一站点还可向第二站点发送BA请求帧(ba request，BAR)。BA请求帧可以是紧接着前序帧(如间隔一段固定的时间段，如短帧间间隔SIFS)发送的。该前序帧可以是接入点发送的确认帧(ACK帧)或块确认帧(BA帧)或多用户块确认帧(MBA)，也可能是第三站点发送的数据帧。第二站点接收BA请求帧之后，向第一站点发送BA帧。
本申请实施例，采用两个用户信息字段即可完整指示一条D2D链路，而不需要额外增加信令开销，实现方式简单，且在同一个触发帧中，还可以调度支持802.11ax的站点进行OFDMA上行传输或随机接入，实现了后向兼容。
下面对第二站点回复BA帧的几种可能的实现方式进行介绍：
方式一：如图8所示，接入点和第二站点同时回复BA帧。接入点按照IEEE 802.11ax的现有规定在RU级别上为每一个上行传输的站点单独回复BA，即接入点在任何一个RU上接收站点的数据，就在这个RU上为这个站点回复BA。图8以上行传输的站点为第三站点和第四站点为例。第二站点在接收D2D数据的RU上回复BA帧。承载D2D BA帧的PPDU仅仅在第二站点接收D2D数据的这个RU上传输，该PPDU的前导码并不占据20MHz，仅占据第二站点接收D2D数据的这个RU。
方式二：如图9所示，接入点和第二站点同时回复BA帧。接入点在一个更大的带宽为多个上行传输的站点一并回复MBA。图9以上行传输的站点为第三站点和第四站点为例。在方式二中，第二站点回复BA帧的具体实现方式与上述方式一中第二站点回复BA帧的具体实现方式相同，在此不赘述。
方式三：如图10所示，接入点和第二站点同时回复BA帧。该方法适用引入的多链路技术(Multi-link)。其中，第二站点在D2D数据接收完毕之后，在等待SIFS后直接在整个20MHz上回复BA帧。接入点则在另一个非D2D传输的链路上，一并回复多个链路的MBA。
基于上述方式一～方式三所描述的第二站点回复BA帧的实现方式，有利于避免接入点回复的BA帧和第二站点回复BA帧产生干扰。其中，以上三种第二站点回复BA帧的方式也可以单独使用不与前面的方案相结合。
可见，基于图2所描述的方法，接入点能够为第一站点和第二站点分配D2D传输资 源单元，从而第一站点和第二站点能够在WiFi系统中实现D2D传输。
在上述图2所描述的方法实施例中，对触发帧的第一种帧结构进行了介绍。本申请实施例还提供了另外一种D2D传输方法，以及另外两种触发帧的帧结构。
请参见图11，图11是本申请实施例提供的一种D2D传输方法的流程示意图。如图11所示，该D2D传输方法包括如下步骤1101～步骤1103，图11所示的方法执行主体可以为接入点和站点。或者，图11所示的方法执行主体可以为接入点中的芯片和站点中的芯片。图11以接入点和站点为执行主体为例进行说明。其中：
1101、接入点生成触发帧。
其中，触发帧包括用户信息字段，该用户信息字段中包括第一站点的标识、资源分配信息、第一指示信息和第一标识信息，该第一站点为D2D传输的发送方，该第一指示信息用于指示该资源分配信息所指示的资源单元用于D2D传输，该第一标识信息为第二站点的标识，该第二站点为D2D传输的接收方，或，该第一标识信息为D2D传输的链路标识。
关于第一站点的标识、第一指示信息的相关介绍可参见前述实施例的相关描述，在此不赘述。资源分配信息用于为D2D传输分配资源单元，资源分配信息处于用户信息字段的资源单元分配字段(RU allocation field)中。
在一种可能的实现中，第一标识信息可以是第二站点的部分标识或完整的标识。
在一种可能的实现中，该触发帧的用户信息字段包括48个比特。基于该可能的实现方式，有利于提高系统兼容性。
在一种可能的实现中，第一指示信息处于用户信息字段的第40个比特(B39)；或第一指示信息处于用户信息字段的第12个比特(B11)；或第一指示信息处于用户信息字段的第46个比特(B45)，即第一指示信息处于第一用户信息字段中的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)。基于该可能的实现方式，有利于减少用户信息字段的比特。
在一种可能的实现中，第一标识信息处于用户信息字段的第33个比特(B32)～第39个比特(B38)中。在D2D传输中，可以复用用户信息字段的UL Target RSSI子字段(B32-B38)携带第一标识信息。当第一指示信息用于指示资源分配信息所指示的资源单元用于D2D传输时，第33个比特(B32)～第39个比特(B38)携带第一标识信息。当第一指示信息用于指示资源分配信息所指示的资源单元用于上行传输时，该用户信息字段的第33个比特(B32)～第39个比特(B38)为UL Target RSSI字段。基于该可能的实现方式，有利于减少用户信息字段的比特。
在一种可能的实现中，第一站点的标识处于用户信息字段的第1个比特(B0)至第12个比特(B11)。或者，第一站点的标识处于用户信息字段的第1个比特(B0)至第11个比特(B10)。
在一种可能的实现中，资源分配信息处于用户信息字段的第13个比特(B12)至第20个比特(B19)。
举例来说，如图12所示，触发帧包括帧控制(frame control)字段、时长(duration)字段、接收地址(RA)字段、发送地址(TA)字段、公共信息(common info)字段、多个用户信息(user info)字段、填充(padding)字段和帧校验序列(FCS)字段。该触发帧中也可以只包括图12所示的部分字段，或触发帧中包括的字段也可以多于图12所示的 字段。
如图12所示，用户信息字段包括48个比特。用户信息字段的第13个比特(B12)至第20个比特(B19)携带资源分配信息。用户信息字段的第40个比特(B39)携带第一指示信息。如果第一指示信息的比特值为1，用于指示资源分配信息指示的资源单元用于D2D传输。如果第一指示信息的比特值为0，用于指示资源分配信息指示的资源单元用于上行传输。如果第一指示信息的比特值为0，用户信息字段的第33个比特(B32)～第39个比特(B38)为UL Target RSSI字段。
如果第一指示信息的比特值为1，则用户信息字段的第33个比特(B32)～第39个比特(B38)携带第一标识信息。第一标识信息为第二站点的标识或D2D传输的链路标识。且用户信息字段的第1个比特(B0)至第12个比特(B11)携带D2D传输的发送方的标识。第一站点是D2D传输的发送方。因此，如果第一指示信息的比特值为1，则用户信息字段的第1个比特(B0)至第12个比特(B11)携带第一站点的标识。图12以第一指示信息的比特值为1为例。
或者，如图13所示，也可以第一指示信息处于用户信息字段的第12个比特(B11)，用户信息字段的第1个比特(B0)至第11个比特(B10)携带D2D传输的发送方的标识。
或者，如图14所示，也可以第一指示信息处于用户信息字段的第46个比特(B45)，即第一指示信息处于第一用户信息字段中的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)。
1102、接入点发送该触发帧。
本申请实施例中，接入点生成该触发帧之后，发送该触发帧。例如，接入点可以广播触发帧给接入点下的站点。
1103、第一站点在资源分配信息指示的D2D传输资源单元上向第二站点发送数据。
本申请实施例中，如果第一标识信息为D2D传输的链路标识，第一站点接收触发帧之后，解析该触发帧中的用户信息字段，得到D2D传输的链路标识。第一站点基于D2D传输的链路标识确定第二站点为接收方，并在资源分配信息指示的D2D传输资源单元上向第二站点发送数据。可选的，第一站点基于D2D传输的链路标识确定第二站点为接收方的具体实施方式为：第一站点根据预存的D2D传输的链路标识与D2D传输的接收方标识、D2D传输的接收方标识的对应关系，确定第二站点为D2D传输的接收方。同理，第二站点接收触发帧之后，解析该触发帧中的用户信息字段，得到D2D传输的链路标识，并基于D2D传输的链路标识确定第二站点为D2D传输的接收方。第二站点在资源分配信息分配的D2D传输资源上接收第一站点发送的数据。
例如，第一站点和第二站点存储了下表1所示的对应关系。若触发帧中的用户信息字段携带D2D传输的链路标识1。第一站点接收触发帧之后，第一站点基于表1所示的对应关系，确定第二站点为D2D传输的接收方。第一站点在资源分配信息分配的D2D传输资源单元上向第二站点发送数据。第二站点接收触发帧之后，第二站点基于表1所示的对应关系，确定第二站点为D2D传输的接收方。第二站点在资源分配信息分配的D2D传输资源单元上接收第一站点发送的数据。
表1
D2D传输的链路标识 D2D传输链路的发送方标识 D2D传输链路的接收方标识
D2D传输的链路标识1 第一站点的标识 第二站点的标识
D2D传输的链路标识2 第一站点的标识 第三站点的标识
如果第一标识信息为第二站点的部分标识，则第一站点将标识信息中包括第一标识信息的站点确定为第二站点，并在资源分配信息指示的D2D传输资源单元上向第二站点发送数据。例如，第一站点存储的站点标识包括站点1的111111111111、站点2的000000000000和站点3的110110110110。如果第一标识信息为1111111，则第一站点在资源分配信息指示的D2D传输资源单元上向站点1发送数据。
在一种可能的实现中，触发帧中还可包括第三用户信息字段，该第三用户信息字段用于为第三站点分配用于上行传输的资源单元。第三站点接收该触发帧之后，在分配的用于上行传输的资源单元上向接入点发送上行数据。接入点接收该上行数据之后，向第三站点发送确认帧(ACK帧)或块确认帧(BA帧)。如果接入点接收到多个站点发送的上行数据，接入点也可以向该多个站点发送多用户块确认帧(MBA)。
在一种可能的实现中，第一站点向第二站点发送BA请求帧(ba request，BAR)。BA请求帧可以是紧接着前序帧(如间隔一段固定的时间段，如短帧间间隔SIFS)发送的。该前序帧可以是接入点发送的确认帧(ACK帧)或块确认帧(BA帧)或多用户块确认帧(MBA)，也可能是第三站点发送的数据帧。第二站点接收BA请求帧之后，向第一站点发送BA帧。第一站点回复BA帧的三种可能的实现方式可参见上述方法实施例中的描述，在此不赘述。
本申请实施例，采用一个用户信息字段即可完整指示一条D2D链路，而不需要额外增加信令开销，实现方式简单，且在同一个触发帧中，还可以调度支持802.11ax的站点进行OFDMA上行传输或随机接入，实现了后向兼容。
可见，基于图11所描述的方法，接入点能够为第一站点和第二站点分配D2D传输资源单元，从而第一站点和第二站点能够在WiFi系统中实现D2D传输。
下面对触发帧的第三种帧结构进行介绍：
请参见图15，图15是本申请实施例提供的一种D2D传输方法的流程示意图。如图15所示，该D2D传输方法包括如下步骤1501～步骤1505，图15所示的方法执行主体可以为接入点和站点。或者，图15所示的方法执行主体可以为接入点中的芯片和站点中的芯片。图15以接入点和站点为执行主体为例进行说明。其中：
1501、接入点生成触发帧。
其中，触发帧的用户信息字段中包括D2D传输的链路标识和D2D传输的资源分配信息。该D2D传输的链路标识也可称为D2D传输的链路关联标识(AID)。
在一种可能的实现中，该触发帧的用户信息字段包括48个比特。基于该可能的实现方式，有利于提高系统兼容性。
在一种可能的实现中，D2D传输的链路标识处于用户信息字段的第1个比特(B0)～第12个比特(B11)。基于该可能的实现方式，D2D传输的链路标识能够与关联标识(AID)复用用户信息字段的第1个比特(B0)～第12个比特(B11)，有利于节省用户信息字段的比特。
在一种可能的实现中，D2D传输的链路标识处于用户信息字段的第1个比特(B0)～第12个比特(B11)时，D2D传输的链路标识与接入点下的任意一个站点的标识不相同，这样有利于避免站点将D2D传输的链路标识解读为站点的标识。
举例来说，如图16所示，触发帧包括帧控制(frame control)字段、时长(duration)字段、接收地址(RA)字段、发送地址(TA)字段、公共信息(common info)字段、多个用户信息(user info)字段、填充(padding)字段和帧校验序列(FCS)字段。该触发帧中也可以只包括图16所示的部分字段，或触发帧中包括的字段也可以多于图16所示的字段。
如图16所示，用户信息字段包括48个比特。D2D传输的链路标识处于用户信息字段的第1个比特(B0)～第12个比特(B11)。用户信息字段的第13个比特(B12)至第20个比特(B19)携带D2D传输的资源分配信息。或者，D2D传输的链路标识也可处于用户信息字段的第1个比特(B11)～第11个比特(B10)，用户信息字段的第12个比特可用于携带其他参数。
在一种可能的实现中，用户信息字段中还包括第一指示信息，该第一指示信息用于指示资源分配信息所分配的资源用于D2D传输。基于该可能的实现方式，有利于站点区分用户信息字段中分配的资源单元用于D2D传输还是上行传输。
在一种可能的实现中，该第一指示信息可以处于用户信息字段的第1个比特(B0)～第12个比特(B11)。基于该可能的实现方式，该第一指示信息能够与关联标识(AID)复用用户信息字段的第1个比特(B0)～第12个比特(B11)，有利于节省用户信息字段的比特。
在一种可能的实现中，该第一指示信息可以处于用户信息字段的第1个比特(B0)～第12个比特(B11)时，D2D传输的链路标识处于用户信息字段的第33个比特(B32)～第39个比特(B38)，或D2D传输的链路标识处于用户信息字段的第33个比特(B32)～第40个比特(B39)。基于该可能的实现方式，在D2D传输中，可以复用用户信息字段的UL Target RSSI子字段(B32-B38)携带D2D传输的链路标识，有利于节省用户信息字段的比特。可选的，该第一指示信息用于指示资源分配信息所分配的资源用于D2D传输时，第一指示信息的值可以为2008～2044，2047～4094中的任意一个。
例如，如图17所示，用户信息字段包括48个比特。第一指示信息处于用户信息字段的第1个比特(B0)～第12个比特(B11)。第一指示信息的值为2047，用于指示资源分配信息所指示的资源单元用于D2D传输。用户信息字段的第13个比特(B12)至第20个比特(B19)携带D2D传输的资源分配信息。用户信息字段的第33个比特(B32)～第39个比特(B38)携带D2D传输的链路标识。或者，如图18所示，用户信息字段的第33个比特(B32)～第40个比特(B39)携带D2D传输的链路标识。当第一指示信息的值不为2047时，第一指示信息指示站点的标识，且第33个比特(B32)～第39个比特(B38)为UL Target RSSI字段，用户信息字段的第40个比特(B39)为预留位。图17和图18以第一指示信息的值为2047为例。
1502、接入点发送触发帧。
1503、第一站点基于D2D传输的链路标识确定第一站点为D2D传输链路的发送方，以及确定第二站点为D2D传输链路的接收方。
本申请实施例中，第一站点接收触发帧之后，解析该触发帧中的用户信息字段，得到D2D传输的链路标识。第一站点根据预存的D2D传输的链路标识与D2D传输的接收方标识、D2D传输的接收方标识的对应关系，确定第一站点为D2D传输链路的发送方，以及确定第二站点为D2D传输链路的接收方。
1504、第一站点在资源分配信息指示的D2D传输资源单元上向第二站点发送数据。
第一站点确定第一站点为D2D传输链路的发送方，以及确定第二站点为D2D传输链路的接收方之后，在资源分配信息指示的D2D传输资源单元上向第二站点发送数据。
1505、第二站点基于D2D传输的链路标识确定第二站点为D2D传输链路的接收方。
本申请实施例中，第二站点接收触发帧之后，解析该触发帧中的用户信息字段，得到D2D传输的链路标识。第二站点根据预存的D2D传输的链路标识与D2D传输的接收方标识、D2D传输的接收方标识的对应关系，确定第二站点为D2D传输的接收方。第二站点在资源分配信息分配的D2D传输资源上接收第一站点发送的数据。
在一种可能的实现中，触发帧中还可包括第三用户信息字段，该第三用户信息字段用于为第三站点分配用于上行传输的资源单元。第三站点接收该触发帧之后，在分配的用于上行传输的资源单元上向接入点发送上行数据。接入点接收该上行数据之后，向第三站点发送确认帧(ACK帧)或块确认帧(BA帧)。如果接入点接收到多个站点发送的上行数据，接入点也可以向该多个站点发送多用户块确认帧(MBA)。
在一种可能的实现中，第一站点向第二站点发送BA请求帧(ba request，BAR)。BA请求帧可以是紧接着前序帧(如间隔一段固定的时间段，如短帧间间隔SIFS)发送的。该前序帧可以是接入点发送的确认帧(ACK帧)或块确认帧(BA帧)或多用户块确认帧(MBA)，也可能是第三站点发送的数据帧。第二站点接收BA请求帧之后，向第一站点发送BA帧。第一站点回复BA帧的三种可能的实现方式可参见上述方法实施例中的描述，在此不赘述。
可见，基于图15所描述的方法，接入点能够为第一站点和第二站点分配D2D传输资源单元，从而第一站点和第二站点能够在WiFi系统中实现D2D传输。
本申请实施例还提供了一种D2D传输方法。该D2D传输方法可应用于WiFi系统中下行传输和D2D传输相结合的混合传输场景。请参见图19，图19是本申请实施例提供的又一种D2D传输方法的流程示意图。如图19所示，该D2D传输方法包括如下步骤1901～步骤1905，图19所示的方法执行主体可以为接入点和站点。或者，图19所示的方法执行主体可以为接入点和站点中的芯片。图19以接入点和站点为执行主体为例进行说明。其中：
1901、接入点生成下行协议数据单元(PHY protocol data unit，PPDU)。
其中，该下行PPDU的前导码中携带资源分配信息和D2D传输的链路标识，资源分配信息用于指示D2D传输的资源单元。可选的，该D2D传输的链路标识可以为D2D传输的链路的部分标识或完整标识。该D2D传输的链路标识可以为D2D传输的链路标识的前十个比特。
在一种可能的实现中，前导码还包括第一指示信息，该第一指示信息指示资源分配信息所指示的资源单元用于D2D传输。基于该可能的实现方式，有利于站点区分用户信息字段中分配的资源单元用于D2D传输还是下行传输。例如，可以设置第一指示信息的值为2046时，指示资源分配信息所指示的资源单元用于D2D传输。否则，第一指示信息指示资源分配信息所指示的资源单元用于下行传输。或者，第一指示信息指示资源分配信息所指示的资源单元用于D2D传输时，第一指示信息的值为802.11ax标准协议规定的其他预留值，本申请实施例不做限定。
在一种可能的实现中，第一指示信息处于前导码的用户域的第1个比特(B0)～第11个比特(B10)。基于该可能的实现方式，有利于节省用户信息字段的比特。在一种可能的实现中，该第一指示信息指示资源分配信息所指示的资源单元用于D2D传输时，前导码的用户域的第12个比特(B11)～第21个比特(B20)携带D2D传输的链路标识。否则，前导码的用户域的第12个比特(B11)～第21个比特(B20)携带802.11ax标准中规定的信息。例如，图20以第一指示信息的值为2046，指示资源分配信息所分配的资源用于D2D传输为例。
1902、接入点发送下行PPDU。
本申请实施例中，接入点生成下行PPDU之后，可发送下行PPDU。例如，接入点可以广播下行PPDU给接入点下的站点。
1903、第一站点基于D2D传输的链路标识确定第一站点为D2D传输链路的发送方，以及确定第二站点为D2D传输链路的接收方。
本申请实施例中，第一站点和第二站点存储有D2D传输的链路标识与D2D传输链路的发送方标识和D2D传输链路的接收方标识的对应关系。第一站点可基于该对应关系和下行PPDU的前导码中携带的D2D传输的链路标识来确定第一站点为D2D传输链路的发送方，以及确定第二站点为D2D传输链路的接收方。第二站点接收下行PPDU之后，第二站点基于该对应关系，确定第二站点为D2D传输的接收方。
1904、第一站点在资源分配信息分配的D2D传输资源单元上向第二站点发送数据。
1905、第二站点基于D2D传输的链路标识确定第二站点为D2D传输链路的接收方。
本申请实施例中，第二站点基于该对应关系，确定第二站点为D2D传输的接收方之后，第二站点在资源分配信息分配的D2D传输资源上接收第一站点发送的数据。
在一种可能的实现中，如图21所示，第一站点在20MHz或者其整数倍上向第二站点发送数据。即资源分配信息分配的D2D传输资源单元在频域上为20MHz或20MHz的整数倍。可选的，D2D的PPDU的前导码(preamble)可使用单用户(single user，SU)格式发送。基于该可能的实现，由于前导码与数据部分占据相同的带宽，D2D传输的物理层前导部分不会跟下行传输的物理层前导部分重叠，有利于避免产生干扰。
在一种可能的实现中，如图22所示，第一站点可在更细粒度即小于20MHz的RU上向第二站点发送数据。D2D传输的PPDU只能工作在该RU范围内，即D2D传输的PPDU(包含preamble)完全在该RU上发送。基于该可能的实现方式，能够更灵活地分配D2D传输资源。
可见，基于图19所描述的方法，接入点能够为第一站点和第二站点分配D2D传输资源单元，从而第一站点和第二站点能够在WiFi系统中实现D2D传输。
本申请实施例还提供了一种需求汇报方法，请参见图23，图23是本申请实施例提供的一种需求汇报方法的流程示意图。如图23所示，该需求汇报方法包括如下步骤2301～步骤2302，图23所示的方法执行主体可以为站点。或者，图23所示的方法执行主体可以为站点中的芯片。图23以站点为执行主体为例进行说明。其中：
2301、站点生成需求汇报帧。
其中，该需求汇报帧用于指示站点有需求进行D2D传输。
2302、站点向接入点发送需求汇报帧。
相应地，接入点可以接收该需求汇报帧。可选的，接入点接收站点发送的需求汇报帧之后，生成触发帧，该触发帧用于触发站点进行D2D传输。
在一种可能的实现中，需求汇报帧包括需求汇报信息，该需求汇报信息包括以下信息中的一项或多项：D2D传输的接收方的标识、用于确定D2D传输的业务量大小的信息、D2D传输的业务类型。基于该可能的实现方式，站点能够通知接入点D2D传输的接收方、D2D传输的业务量大小和D2D传输的业务类型。
可选的，D2D传输的业务量大小可以为站点的缓冲区中所包含的待发送给第二站点的数据量的字节数。或者，D2D传输的业务量大小可以为优先级最高的业务的业务量大小。或者D2D传输的业务量大小可以为所有业务的业务量大小。用于确定D2D传输的业务量大小的信息可以直接为D2D传输的业务量大小，全部队列长度，或者为尺度因子。该全部队列长度为全部队列中等待发送的数据的总长度。接入点基于尺度因子就能确定D2D传输的业务量大小，例如，可以使用尺度因子乘以业务量单位等于D2D传输的业务量大小。
D2D传输的业务类型可以为D2D传输的接入等级(ACI)或可以为其他业务类型。
在一种可能的实现中，需求汇报信息承载于需求汇报帧的高效控制HE-control字段的控制信息字段中。可选的，HE-control字段可以处于MAC header中。HE-control字段可包括控制标识(control ID)字段和控制信息(control information)字段。HE-control字段可包括30个比特。控制标识(control ID)字段为HE-control字段的前4个比特，控制信息(control information)字段为HE-control字段的后26个比特。
在一种可能的实现中，需求汇报帧还包括控制标识，该控制标识用于指示该控制信息字段携带D2D传输的需求汇报信息。基于该可能的实现方式，有利于接入点能够识别需求汇报帧的功能。
在一种可能的实现中，控制标识承载于需求汇报帧的高效控制HE-control字段的控制标识字段中。或者，控制标识也可承载于高效控制HE-control字段的其他字段中。
举例来说，如图24所示，HE-control字段包括控制标识(control ID)字段和控制信息(control information)字段。其中，控制标识(control ID)字段为HE-control字段的前4个比特，控制信息(control information)字段为HE-control字段的后26个比特。其中，当控制标识指示该控制信息字段携带D2D传输的需求汇报信息时，控制信息的值为十进制的10，或者，控制信息的值也可以为任何一种IEEE 802.11ax所预留的控制ID。控制信息(control information)字段中包括需求汇报信息，需求汇报信息包括第二站点的标识、接入等级指示位图、尺度因子和全部队列长度。
在一种可能的实现中，站点生成需求汇报帧之前，接入点向站点发送需求汇报触发帧，该需求汇报触发帧为缓冲区上报触发帧。站点接收需求汇报触发帧之后，生成需求汇报帧。在该可能的实现中，站点可以在接收缓冲区上报触发帧之后，就直接生成需求汇报帧。或者，该缓冲区上报触发帧中包括第三指示信息，该第三指示信息用于指示允许站点发送D2D传输的需求汇报帧。站点解析到用于指示允许站点发送D2D传输的需求汇报帧的第三指示信息之后，才生成需求汇报帧。基于该可能的实现方式，接入点可通过已有的触发帧触发站点发送需求汇报帧，无需重新设计一个触发帧来触发站点发送需求汇报帧。
其中，第三指示信息可以为一个或多个比特。例如，第三指示信息的比特值为1或0。当第三指示信息的比特值为1时，用于指示允许站点发送D2D传输的需求汇报帧。当第二指示信息的比特值为0时，用于指示允许站点发送上行传输的需求汇报帧。或者，当第二 指示信息的比特值为0时，用于指示允许站点发送D2D传输的需求汇报帧。当第二指示信息的比特值为1时，用于指示允许站点发送上行传输的需求汇报帧。再如，当第三指示信息的比特值为00时，用于指示允许站点发送D2D传输的需求汇报帧。当第二指示信息的比特值为11时，用于指示允许站点发送上行传输的需求汇报帧。或者，当第二指示信息的比特值为11时，用于指示允许站点发送D2D传输的需求汇报帧。当第二指示信息的比特值为00时，用于指示允许站点发送上行传输的需求汇报帧。
在一种可能的实现中，第三指示信息处于缓冲区上报触发帧的用户信息字段的第40个比特(B39)。基于该可能的实现方式，能够将802.11ax标准的预留位修改为用于携带第三指示信息，有利于节省用户信息字段的比特。例如，如图25所示，用户信息字段的第40个比特(B39)携带该第三指示信息。当第三指示信息的比特值为1时，用于指示允许站点发送D2D传输的需求汇报帧。当第二指示信息的比特值为0时，用于指示允许站点发送上行传输的需求汇报帧。图25以第三指示信息的比特值为1为例。或者，第三指示信息处于缓冲区上报触发帧的用户信息字段的第46个比特(B45)，即第三指示信息处于缓冲区上报触发帧的用户信息字段的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)。
可见，通过实施图23所描述的实施例，站点能够向接入点反馈D2D的传输需求，从而接入点能够为站点分配D2D传输资源单元。本申请实施例所描述的需求汇报方法也可以单独实现。或者，本申请实施例所描述的需求汇报方法可以与前述D2D传输方法对应的实施例相结合。该站点可以是上述图2、图11、图15和图19所描述的流程中D2D传输的发送方。接入点接收需求汇报帧之后，可执行上述图2、图11、图15和图19所描述的流程。
本申请实施例还提供了一种链路分配方法。该链路分配方法包括：接入点向第一站点和第二站点发送D2D传输的链路分配帧。该链路分配帧包括D2D传输的链路标识、D2D传输的发送方标识和D2D传输的接收方标识。其中，D2D传输也可以称为TDLS传输。D2D传输的链路分配帧也可以称为TDLS链路分配帧(TDLS link allocation frame)。
在一种可能的实现中，如图26所示，可以对IEEE 802.11标准的行为帧(Action Frame)的TDLS行为域(TDLS Action)新增一种行为域的取值。例如，新增取值11，11代表TDLS链路分配(TDLS Link Allocation)。即当TDLS行为域的取值为11时，行为帧为TDLS链路分配帧(或称D2D传输的链路分配帧)。TDLS链路分配帧中包括TDLS标识分配域(TDLS ID allocation field)，该域由一系列TDLS链路分配域(TDLS link allocation field)构成，每一个TDLS链路分配域包含三个子域：TDLS的链路标识、TDLS的发送方标识和TDLS的接收方标识(或称D2D传输的链路标识、D2D传输的发送方标识和D2D传输的接收方标识)。
或者，接入点也可以向第一站点发送D2D传输的第一链路分配帧，该第一链路分配帧包括D2D传输的链路标识和D2D传输的发送方标识。接入点向第二站点发送D2D传输的第二链路分配帧，该第二链路分配帧包括D2D传输的链路标识和D2D传输的接收方标识。
可见，通过实施该链路分配方法，接入点可以为第一站点和第二站点分配D2D链路。本申请实施例所描述的链路分配方法可以单独实现。或者，本申请实施例所描述的链路分配方法可以与前述D2D传输方法对应的实施例相结合。例如，接入点发送链路分配方法之 后，可执行上述图2、图11、图15、图19和图23所描述的流程。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述图2所描述的方法实施例中第一站点的部分或全部功能。该装置可以是第一站点，也可以是第一站点中的装置，或者是能够和第一站点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
通信单元2701，用于接收接入点发送的触发帧，该触发帧包括用户信息字段；该用户信息字段中包括该通信装置的标识、资源分配信息、第一指示信息和第二指示信息，该第一指示信息用于指示该资源分配信息所指示的资源单元用于设备到设备D2D传输，该第二指示信息用于指示该通信装置为该D2D传输的发送方或接收方；通信单元2701，还用于在第一资源分配信息指示的D2D传输资源单元上向第二站点发送数据。
在一种可能的实现中，用户信息字段包括48个比特。
在一种可能的实现中，第一指示信息处于用户信息字段的第40个比特。
在一种可能的实现中，第二指示信息处于用户信息字段的第46个比特。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述图2所描述的方法实施例中接入点的部分或全部功能。该装置可以是接入点，也可以是接入点中的装置，或者是能够和接入点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
处理单元2702，用于生成触发帧，该触发帧包括用户信息字段；该用户信息字段中包括站点的标识、资源分配信息、第一指示信息和第二指示信息，该第一指示信息用于指示该资源分配信息所指示的资源单元用于设备到设备D2D传输，该第二指示信息用于指示该站点为该D2D传输的发送方或接收方；通信单元2701，用于发送触发帧。
在一种可能的实现中，用户信息字段包括48个比特。
在一种可能的实现中，第一指示信息处于用户信息字段的第40个比特。
在一种可能的实现中，第二指示信息处于用户信息字段的第46个比特。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述图11所描述的方法实施例中第一站点的部分或全部功能。该装置可以是第一站点，也可以是第一站点中的装置，或者是能够和第一站点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
通信单元2701，用于接收接入点发送的触发帧，触发帧包括用户信息字段，该用户信息字段中包括通信装置的标识、资源分配信息、第一指示信息和第一标识信息，该通信装置为D2D传输的发送方，该第一指示信息用于指示该资源分配信息所指示的资源单元用 于D2D传输，该第一标识信息为第二站点的标识，该第二站点为D2D传输的接收方，或该第一标识信息为D2D传输的链路标识；通信单元2701，还用于在资源分配信息指示的D2D传输资源单元上向第二站点发送数据。
如果第一标识信息为D2D传输的链路标识，通信单元2701接收触发帧之后，处理单元2702基于D2D传输的链路标识，确定第二站点为D2D传输的接收方。处理单元2702确定第二站点为D2D传输的接收方之后，在资源分配信息指示的D2D传输资源单元上向第二站点发送数据。
在一种可能的实现中，第一标识信息可以是第二站点的部分标识或完整的标识。
在一种可能的实现中，该触发帧的用户信息字段包括48个比特。
在一种可能的实现中，第一指示信息处于用户信息字段的第40个比特(B39)；或第一指示信息处于用户信息字段的第12个比特(B11)；或第一指示信息处于用户信息字段的第46个比特(B45)，即第一指示信息处于第一用户信息字段中的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)。
在一种可能的实现中，第一标识信息处于用户信息字段的第33个比特(B32)～第39个比特(B38)中。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述图11所描述的方法实施例中第二站点的部分或全部功能。该装置可以是第二站点，也可以是第二站点中的装置，或者是能够和第二站点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
通信单元2701，用于接收接入点发送的触发帧，触发帧包括用户信息字段，该用户信息字段中包括第一站点的标识、资源分配信息、第一指示信息和第一标识信息，该第一站点为D2D传输的发送方，该第一指示信息用于指示该资源分配信息所指示的资源单元用于D2D传输，该第一标识信息为通信装置的标识，该通信装置为D2D传输的接收方，或该第一标识信息为D2D传输的链路标识；通信单元2701，还用于在资源分配信息分配的D2D传输资源单元接收第一站点发送的数据。
如果第一标识信息为D2D传输的链路标识，通信单元2701接收触发帧之后，处理单元2702基于D2D传输的链路标识，确定通信装置为D2D传输的接收方。处理单元2702确定通信装置为D2D传输的接收方之后，在资源分配信息指示的D2D传输资源单元上接收第一站点发送的数据。
在一种可能的实现中，第一标识信息可以是第二站点的部分标识或完整的标识。
在一种可能的实现中，该触发帧的用户信息字段包括48个比特。
在一种可能的实现中，第一指示信息处于用户信息字段的第40个比特(B39)；或第一指示信息处于用户信息字段的第12个比特(B11)；或第一指示信息处于用户信息字段的第46个比特(B45)，即第一指示信息处于第一用户信息字段中的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)。
在一种可能的实现中，第一标识信息处于用户信息字段的第33个比特(B32)～第39个比特(B38)中。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述图11所描述的方法实施例中接入点的部分或全部功能。该装置可以是接入点，也可以是接入点中的装置，或者是能够和接入点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
处理单元2702，用于生成触发帧，该触发帧包括用户信息字段，该用户信息字段中包括第一站点的标识、资源分配信息、第一指示信息和第一标识信息，该第一站点为D2D传输的发送方，该第一指示信息用于指示该资源分配信息所指示的资源单元用于D2D传输，该第一标识信息为通信装置的标识，该通信装置为D2D传输的接收方，或该第一标识信息为D2D传输的链路标识；通信单元2701，用于发送该触发帧。
在一种可能的实现中，第一标识信息可以是第二站点的部分标识或完整的标识。
在一种可能的实现中，该触发帧的用户信息字段包括48个比特。
在一种可能的实现中，第一指示信息处于用户信息字段的第40个比特(B39)；或第一指示信息处于用户信息字段的第12个比特(B11)；或第一指示信息处于用户信息字段的第46个比特(B45)，即第一指示信息处于第一用户信息字段中的触发类型相关的用户信息域(trigger dependent user info)的第6个比特(B5)。
在一种可能的实现中，第一标识信息处于用户信息字段的第33个比特(B32)～第39个比特(B38)中。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述图15所描述的方法实施例中第一站点的部分或全部功能。该装置可以是第一站点，也可以是第一站点中的装置，或者是能够和第一站点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
通信单元2701，用于接收接入点发送的触发帧，该触发帧的用户信息字段中包括D2D传输的链路标识和D2D传输的资源分配信息；处理单元2702，用于基于D2D传输的链路标识确定通信装置为D2D传输链路的发送方，以及确定第二站点为D2D传输链路的接收方；通信单元2701，还用于在资源分配信息指示的D2D传输资源单元上向第二站点发送数据。
在一种可能的实现中，该触发帧的用户信息字段包括48个比特。
在一种可能的实现中，D2D传输的链路标识处于用户信息字段的第1个比特(B0)～第12个比特(B11)。
在一种可能的实现中，用户信息字段中还包括第一指示信息，该第一指示信息用于指示资源分配信息所分配的资源用于D2D传输。可选的，该第一指示信息可以处于用户信息字段的第1个比特(B0)～第12个比特(B11)，D2D传输的链路标识处于用户信息字段的第33个比特(B32)～第39个比特(B38)，或D2D传输的链路标识处于用户信息字段的第33个比特(B32)～第40个比特(B39)。可选的，该第一指示信息用于指示资源分配 信息所指示的资源单元用于D2D传输时，第一指示信息的值可以为2008～2044，2047～4094中的任意一个。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述图15所描述的方法实施例中第二站点的部分或全部功能。该装置可以是第二站点，也可以是第二站点中的装置，或者是能够和第二站点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
通信单元2701，用于接收接入点发送的触发帧，该触发帧的用户信息字段中包括D2D传输的链路标识和D2D传输的资源分配信息；处理单元2702，用于基于D2D传输的链路标识确定第二站点为D2D传输链路的接收方；通信单元2701，还用于在资源分配信息指示的D2D传输资源单元接收第一站点发送的数据。
在一种可能的实现中，该触发帧的用户信息字段包括48个比特。
在一种可能的实现中，D2D传输的链路标识处于用户信息字段的第1个比特(B0)～第12个比特(B11)。
在一种可能的实现中，用户信息字段中还包括第一指示信息，该第一指示信息用于指示资源分配信息所分配的资源用于D2D传输。可选的，该第一指示信息可以处于用户信息字段的第1个比特(B0)～第12个比特(B11)，D2D传输的链路标识处于用户信息字段的第33个比特(B32)～第39个比特(B38)，或D2D传输的链路标识处于用户信息字段的第33个比特(B32)～第40个比特(B39)。可选的，该第一指示信息用于指示资源分配信息所分配的资源用于D2D传输时，第一指示信息的值可以为2008～2044，2047～4094中的任意一个。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述图15所描述的方法实施例中接入点的部分或全部功能。该装置可以是接入点，也可以是接入点中的装置，或者是能够和接入点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
处理单元2702，用于生成触发帧，该触发帧的用户信息字段中包括D2D传输的链路标识和D2D传输的资源分配信息；通信单元2701，用于发送该触发帧。
在一种可能的实现中，该触发帧的用户信息字段包括48个比特。
在一种可能的实现中，D2D传输的链路标识处于用户信息字段的第1个比特(B0)～第12个比特(B11)。
在一种可能的实现中，用户信息字段中还包括第一指示信息，该第一指示信息用于指示资源分配信息所指示的资源单元用于D2D传输。可选的，该第一指示信息可以处于用户信息字段的第1个比特(B0)～第12个比特(B11)，D2D传输的链路标识处于用户信息字段的第33个比特(B32)～第39个比特(B38)，或D2D传输的链路标识处于用户信息字段的第33个比特(B32)～第40个比特(B39)。可选的，该第一指示信息用于指示资源 分配信息所分配的资源用于D2D传输时，第一指示信息的值可以为2008～2044，2047～4094中的任意一个。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述图19所描述的方法实施例中第一站点的部分或全部功能。该装置可以是第一站点，也可以是第一站点中的装置，或者是能够和第一站点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
通信单元2701，用于接收接入点发送的下行PPDU，该下行PPDU的前导码中携带资源分配信息和D2D传输的链路标识，该资源分配信息用于指示D2D传输的资源单元；处理单元2702，用于基于D2D传输的链路标识确定通信装置为D2D传输链路的发送方，以及确定第二站点为D2D传输链路的接收方；通信单元2701，还用于在资源分配信息指示的D2D传输资源单元上向第二站点发送数据。
在一种可能的实现中，前导码还包括第一指示信息，该第一指示信息指示资源分配信息所分配的资源用于D2D传输。
在一种可能的实现中，该第一指示信息处于前导码的用户域的第1个比特(B0)～第11个比特(B10)。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述图19所描述的方法实施例中第二站点的部分或全部功能。该装置可以是第二站点，也可以是第二站点中的装置，或者是能够和第二站点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
通信单元2701，用于接收接入点发送的下行PPDU，该下行PPDU的前导码中携带资源分配信息和D2D传输的链路标识，该资源分配信息用于指示D2D传输的资源单元；处理单元2702，用于基于D2D传输的链路标识确定通信装置为D2D传输链路的接收方；通信单元2701，还用于在资源分配信息分配的D2D传输资源单元接收第一站点发送的数据。
在一种可能的实现中，前导码还包括第一指示信息，该第一指示信息指示资源分配信息所指示的资源单元用于D2D传输。
在一种可能的实现中，该第一指示信息处于前导码的用户域的第1个比特(B0)～第11个比特(B10)。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述图19所描述的方法实施例中接入点的部分或全部功能。该装置可以是接入点，也可以是接入点中的装置，或者是能够和接入点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
处理单元2702，用于生成下行PPDU，该下行PPDU的前导码中携带资源分配信息和D2D传输的链路标识，该资源分配信息用于指示D2D传输的资源单元；通信单元2701，用于发送该下行PPDU。
在一种可能的实现中，前导码还包括第一指示信息，该第一指示信息指示资源分配信息所指示的资源单元用于D2D传输。
在一种可能的实现中，该第一指示信息处于前导码的用户域的第1个比特(B0)～第11个比特(B10)。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述图23所描述的方法实施例中站点的部分或全部功能。该装置可以是站点，也可以是站点中的装置，或者是能够和站点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
处理单元2702，用于生成需求汇报帧，该需求汇报帧用于指示通信装置有需求进行D2D传输；通信单元2701，用于向接入点发送需求汇报帧。
在一种可能的实现中，需求汇报帧包括需求汇报信息，该需求汇报信息包括以下信息中的一项或多项：D2D传输的接收方的标识、用于确定D2D传输的业务量大小的信息、D2D传输的业务类型。
在一种可能的实现中，需求汇报信息承载于需求汇报帧的高效控制HE-control字段的控制信息字段中。
在一种可能的实现中，需求汇报帧还包括控制标识，该控制标识用于指示该控制信息字段携带D2D传输的需求汇报信息。
在一种可能的实现中，控制标识承载于需求汇报帧的高效控制HE-control字段的控制标识字段中。
在一种可能的实现中，通信单元2701，还用于在处理单元2702生成需求汇报帧之前，接收接入点发送的需求汇报触发帧，该需求汇报触发帧为缓冲区上报触发帧。
在一种可能的实现中，该缓冲区上报触发帧中包括第三指示信息，该第三指示信息用于指示允许通信装置发送D2D传输的需求汇报帧。
在一种可能的实现中，第三指示信息处于缓冲区上报触发帧的用户信息字段的第40个比特(B39)。
其中，该通信装置可以单独实现或还可实现上述用于实现上述D2D传输方法中D2D发送方的功能。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述图23所描述的方法实施例中接入点的部分或全部功能。该装置可以是接入点，也可以是接入点中的装置，或者是能够和接入点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
通信单元2701，用于接收需求汇报帧，该需求汇报帧用于指示站点有需求进行D2D传输。
可选的，处理单元2702，用于在通信单元2701接收站点发送的需求汇报帧之后，生成触发帧，该触发帧用于触发站点进行D2D传输。
在一种可能的实现中，需求汇报帧包括需求汇报信息，该需求汇报信息包括以下信息中的一项或多项：D2D传输的接收方的标识、用于确定D2D传输的业务量大小的信息、D2D传输的业务类型。
在一种可能的实现中，需求汇报信息承载于需求汇报帧的高效控制HE-control字段的控制信息字段中。
在一种可能的实现中，需求汇报帧还包括控制标识，该控制标识用于指示该控制信息字段携带D2D传输的需求汇报信息。
在一种可能的实现中，控制标识承载于需求汇报帧的高效控制HE-control字段的控制标识字段中。
在一种可能的实现中，通信单元2701，还用于在接收需求汇报帧之前，向站点发送需求汇报触发帧，该需求汇报触发帧为缓冲区上报触发帧。
在一种可能的实现中，该缓冲区上报触发帧中包括第三指示信息，该第三指示信息用于指示允许站点发送D2D传输的需求汇报帧。
在一种可能的实现中，第三指示信息处于缓冲区上报触发帧的用户信息字段的第40个比特(B39)。
其中，该通信装置可以单独实现或还可实现上述用于实现上述D2D传输方法中接入点的功能。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述链路分配方法中第一站点或第二站点的部分或全部功能。该装置可以是第一站点，也可以是第一站点或第二站点中的装置，或者是能够和第一站点或第二站点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
通信单元2701，用于接收接入点发送的D2D传输的链路分配帧，该链路分配帧包括D2D传输的链路标识、D2D传输的发送方标识和D2D传输的接收方标识。
其中，该通信装置可以单独实现或还可实现上述用于实现上述D2D传输方法中D2D传输的发送方或接收方的功能。
请参见图27，图27示出了本申请实施例的一种通信装置的结构示意图。图27所示的通信装置可以用于执行上述链路分配方法中接入点的部分或全部功能。该装置可以是接入点，也可以是接入点中的装置，或者是能够和接入点匹配使用的装置。其中，该通信装置还可以为芯片系统。图27所示的通信装置可以包括通信单元2701和处理单元2702。该通信单元也可以称为收发单元，或者该通信单元包括接收单元和发送单元。处理单元2702，用于进行数据处理。其中：
通信单元2701，用于向第一站点和第二站点发送D2D传输的链路分配帧，该链路分 配帧包括D2D传输的链路标识、D2D传输的发送方标识和D2D传输的接收方标识。
其中，该通信装置可以单独实现或还可实现上述用于实现上述D2D传输方法中接入点的功能。
如图28a所示为本申请实施例提供的一种通信装置280，用于实现上述图2或图23所描述的方法实施例中站点或接入点的功能；或，用于实现上述图11、图15或图19所描述的方法实施例中第一站点、第二站点或接入点的功能；该装置可以是站点、第一站点、第二站点或接入点，或该装置可以是用于站点的装置、用于第一站点的装置、用于第二站点的装置或用于接入点的装置。用于站点的装置可以为站点内的芯片系统或芯片。用于第一站点的装置可以为第一站点内的芯片系统或芯片。用于第二站点的装置可以为第二站点内的芯片系统或芯片。用于接入点的装置可以为接入点内的芯片系统或芯片。其中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
通信装置280包括至少一个处理器2820，用于实现本申请上述D2D传输方法中站点、第一站点、第二站点或接入点的数据处理功能。或用于实现本申请上述需求汇报方法中站点或接入点的数据处理功能。或用于实现本申请上述链路分配方法中第一站点、第二站点或接入点的数据处理功能。
装置280还可以包括通信接口2810，用于实现本申请上述D2D传输方法中站点、第一站点、第二站点或接入点的收发操作。或用于实现本申请上述需求汇报方法中站点或接入点的收发操作。或用于实现本申请上述链路分配方法中第一站点、第二站点或接入点的收发操作。
在本申请实施例中，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口，用于通过传输介质和其它设备进行通信。例如，通信接口2810用于装置280中的装置可以和其它设备进行通信。处理器2820利用通信接口2810收发数据，并用于实现上述方法实施例所述的方法。
装置280还可以包括至少一个存储器2830，用于存储程序指令和/或数据。存储器2830和处理器2820耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。处理器2820可能和存储器2830协同操作。处理器2820可能执行存储器2830中存储的程序指令。所述至少一个存储器中的至少一个可以包括于处理器中。
本申请实施例中不限定上述通信接口2810、处理器2820以及存储器2830之间的具体连接介质。本申请实施例在图28a中以存储器2830、通信接口2820以及通信接口2810之间通过总线2840连接，总线在图28a中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图28a中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
装置280具体是用于站点、第一站点、第二站点或接入点的装置时，例如装置280具体是芯片或者芯片系统时，通信接口2810所输出或接收的可以是基带信号。装置280具体是站点、第一站点、第二站点或接入点时，通信接口2810所输出或接收的可以是射频信号。在本申请实施例中，处理器可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是 微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
作为示例，图28b为本申请实施例提供的另一种站点2800的结构示意图。该站点可执行上述图2或图23中站点所执行的操作，或可执行图11、图15或图19中第一站点所执行的操作，或该站点可执行上述图11、图15或图19中第二站点所执行的操作。
为了便于说明，图28b仅示出了站点的主要部件。如图28b所示，站点2800包括处理器、存储器、射频电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对整个站点进行控制，执行软件程序，处理软件程序的数据，例如用于支持站点执行图2或图23所描述的流程中第一站点所执行的操作，或支持站点执行图11、图15、或图19所描述的流程中第一站点所执行的操作，或用于支持站点执行上述图11、图15或图19所描述的流程中第二站点所执行的操作。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。站点2800还可以包括输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的站点可以不具有输入输出装置。
当站点开机后，处理器可以读取存储单元中的软件程序，解释并执行软件程序的，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到站点时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解，为了便于说明，图28b仅示出了一个存储器和处理器。在实际的站点中，可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本申请实施例对此不做限制。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器(central processing unit，CPU)，基带处理器主要用于对通信协议以及通信数据进行处理，CPU主要用于对整个站点进行控制，执行软件程序，处理软件程序的数据。可选的，该处理器还可以是网络处理器(network processor，NP)或者CPU和NP的组合。处理器还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic,GAL)或其任意组合。存储器可以包括易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)；存储器也可以包括非易失性存储器(non-volatile memory)，例如快闪存储器(flash memory)，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)；存储器还可以包括上述种类的存储器的组合。
示例性的，在本申请实施例中，如图28b所示，可以将具有收发功能的天线和射频电路视为站点2800的通信单元2801，将具有处理功能的处理器视为站点2800的处理单元2802。
通信单元2801也可以称为收发器、收发机、收发装置、收发单元等，用于实现收发功能。可选的，可以将通信单元2801中用于实现接收功能的器件视为接收单元，将通信单元2801中用于实现发送功能的器件视为发送单元，即通信单元2801包括接收单元和发送单元。示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
在一些实施例中，通信单元2801、处理单元2802可能集成为一个器件，也可以分离为不同的器件，此外，处理器与存储器也可以集成为一个器件，或分立为不同器件。
其中，通信单元2801可用于执行上述方法实施例中站点、第一站点或第二站点的收发操作。处理单元2802可用于执行上述方法实施例中站点、第一站点或第二站点的数据处理操作。
本申请实施例还提供一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在处理器上运行时，用于执行上述方法实施例中站点执行的方法。
本申请实施例还提供一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在处理器上运行时，用于执行上述方法实施例中接入点执行的方法。
本申请实施例还提供一种计算机程序产品，当所述计算机程序产品在处理器上运行时，用于执行上述方法实施例中站点执行的方法。
本申请实施例还提供一种计算机程序产品，当所述计算机程序产品在处理器上运行时，用于执行上述方法实施例中接入点执行的方法。
基于同一发明构思，本申请实施例中提供的各装置解决问题的原理与本申请方法实施例相似，因此各装置的实施可以参见方法的实施，为简洁描述，在这里不再赘述。
需要说明的是，对于前述的各方法实施例，为了简单描述，故将其都表述为一系列的动作组合，但是本领域技术人员应该知悉，本申请并不受所描述的动作顺序的限制，因为依据本申请，某些步骤可以采用其他顺序或者同时进行。其次，本领域技术人员也应该知悉，说明书中所描述的实施例均属于优选实施例，所涉及的动作和模块并不一定是本申请所必须的。
本申请提供的各实施例的描述可以相互参照，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。为描述的方便和简洁，例如关于本申请实施例提供的各装置、设备的功能以及执行的步骤可以参照本申请方法实施例的相关描述，各方法实施例之间、各装置实施例之间也可以互相参考、结合或引用。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (70)

  1. 一种通信装置，其特征在于，所述通信装置包括：
    通信单元，用于接收接入点发送的触发帧，所述触发帧包括用户信息字段；所述用户信息字段中包括所述通信装置的标识、资源分配信息、第一指示信息和第二指示信息，所述第一指示信息用于指示所述资源分配信息所指示的资源单元用于设备到设备D2D传输，所述第二指示信息用于指示所述通信装置为所述D2D传输的发送方或接收方；
    所述通信单元，还用于在所述资源分配信息指示的资源单元上进行所述D2D传输。
  2. 根据权利要求1所述的装置，其特征在于，所述用户信息字段包括48个比特。
  3. 根据权利要求1或2所述的装置，其特征在于，所述第一指示信息处于所述用户信息字段的第40个比特。
  4. 根据权利要求1～3中任意一项所述的装置，其特征在于，所述第二指示信息处于所述用户信息字段的第46个比特。
  5. 根据权利要求1～4中任意一项所述的装置，其特征在于，所述第二指示信息用于指示所述通信装置为所述D2D传输的发送方，所述通信装置还包括：
    处理单元，用于在所述通信单元接收接入点发送的触发帧之前，生成需求汇报帧，所述需求汇报帧用于指示所述通信装置有需求进行D2D传输；
    所述通信单元，还用于向所述接入点发送需求汇报帧；
    其中，所述需求汇报帧包括需求汇报信息，所述需求汇报信息包括以下信息中的一项或多项：所述D2D传输的接收方的标识、用于确定所述D2D传输的业务量大小的信息、所述D2D传输的业务类型。
  6. 根据权利要求5所述的装置，其特征在于，所述需求汇报信息承载于所述需求汇报帧的高效控制HE-control字段的控制信息字段中；所述需求汇报帧还包括控制标识，所述控制标识用于指示所述控制信息字段携带D2D传输的需求汇报信息；所述控制标识承载于所述需求汇报帧的高效控制HE-control字段的控制标识字段中。
  7. 根据权利要求5或6所述的装置，其特征在于，
    所述通信单元，还用于在向所述接入点发送需求汇报帧之前，接收所述接入点发送的需求汇报触发帧，所述需求汇报触发帧为缓冲区上报触发帧，所述缓冲区上报触发帧中包括第三指示信息，所述第三指示信息用于指示允许所述通信装置发送D2D传输的需求汇报帧。
  8. 根据权利要求7所述的装置，其特征在于，所述第三指示信息处于所述缓冲区上报触发帧的用户信息字段的第40个比特。
  9. 一种通信装置，其特征在于，所述通信装置包括：
    处理单元，用于生成触发帧，所述触发帧包括用户信息字段；所述用户信息字段中包括站点的标识、资源分配信息、第一指示信息和第二指示信息，所述第一指示信息用于指示所述资源分配信息所指示的资源单元用于设备到设备D2D传输，所述第二指示信息用于指示所述站点为所述D2D传输的发送方或接收方；
    通信单元，用于发送所述触发帧。
  10. 根据权利要求9所述的装置，其特征在于，所述用户信息字段包括48个比特。
  11. 根据权利要求9或10所述的装置，其特征在于，所述第一指示信息处于所述用户信息字段的第40个比特。
  12. 根据权利要求9～11中任意一项所述的装置，其特征在于，所述第二指示信息处于所述用户信息字段的第46个比特。
  13. 根据权利要求9～12中任意一项所述的装置，其特征在于，所述第二指示信息用于指示所述站点为所述D2D传输的发送方；
    所述通信单元，用于在所述处理单元生成触发帧之前，接收所述站点发送的需求汇报帧，所述需求汇报帧用于指示所述站点有需求进行D2D传输；
    其中，所述需求汇报帧还包括需求汇报信息，所述需求汇报信息包括以下信息中的一项或多项：所述D2D传输的接收方的标识、用于确定所述D2D传输的业务量大小的信息、所述D2D传输的业务类型。
  14. 根据权利要求13所述的装置，其特征在于，所述需求汇报信息承载于所述需求汇报帧的高效控制HE-control字段的控制信息字段中；所述需求汇报帧还包括控制标识，所述控制标识用于指示所述控制信息字段携带D2D传输的需求汇报信息；所述控制标识承载于所述需求汇报帧的高效控制HE-control字段的控制标识字段中。
  15. 根据权利要求13或14所述的装置，其特征在于，
    所述通信单元，还用于在接收所述站点发送的需求汇报帧之前，向所述站点发送需求汇报触发帧，所述需求汇报触发帧为缓冲区上报触发帧，所述缓冲区上报触发帧中包括第三指示信息，所述第三指示信息用于指示允许所述站点发送D2D传输的需求汇报信息。
  16. 根据权利要求15所述的装置，其特征在于，所述第三指示信息处于所述缓冲区上报触发帧的用户信息字段中的第40个比特。
  17. 一种设备到设备D2D传输方法，其特征在于，所述方法包括：
    站点接收接入点发送的触发帧，所述触发帧包括用户信息字段；所述用户信息字段中包括站点的标识、资源分配信息、第一指示信息和第二指示信息，所述第一指示信息用于指示所述资源分配信息所指示的资源单元用于设备到设备D2D传输，所述第二指示信息用 于指示所述站点为所述D2D传输的发送方或接收方；
    所述站点在所述资源分配信息指示的资源单元上进行所述D2D传输。
  18. 根据权利要求17所述的方法，其特征在于，所述用户信息字段包括48个比特。
  19. 根据权利要求17或18所述的方法，其特征在于，所述第一指示信息处于所述用户信息字段的第40个比特。
  20. 根据权利要求17～19中任意一项所述的方法，其特征在于，所述第二指示信息处于所述用户信息字段的第46个比特。
  21. 根据权利要求17～20中任意一项所述的方法，其特征在于，所述站点接收接入点发送的触发帧之前，所述方法还包括：
    所述站点生成需求汇报帧，所述需求汇报帧用于指示所述站点有需求进行D2D传输；
    所述站点向所述接入点发送需求汇报帧；
    其中，所述需求汇报帧包括需求汇报信息，所述需求汇报信息包括以下信息中的一项或多项：所述D2D传输的接收方的标识、用于确定所述D2D传输的业务量大小的信息、所述D2D传输的业务类型。
  22. 根据权利要求21所述的方法，其特征在于，所述需求汇报信息承载于所述需求汇报帧的高效控制HE-control字段的控制信息字段中；所述需求汇报帧还包括控制标识，所述控制标识用于指示所述控制信息字段携带D2D传输的需求汇报信息；所述控制标识承载于所述需求汇报帧的高效控制HE-control字段的控制标识字段中。
  23. 根据权利要求21或22所述的方法，其特征在于，所述站点向所述接入点发送需求汇报帧之前，所述方法还包括：
    所述站点接收所述接入点发送的需求汇报触发帧，所述需求汇报触发帧为缓冲区上报触发帧，所述缓冲区上报触发帧中包括第三指示信息，所述第三指示信息用于指示允许所述站点发送D2D传输的需求汇报帧。
  24. 根据权利要求23所述的方法，其特征在于，所述第三指示信息处于所述缓冲区上报触发帧的用户信息字段的第40个比特。
  25. 一种设备到设备D2D传输方法，其特征在于，所述方法包括：
    接入点生成触发帧，所述触发帧包括用户信息字段；所述用户信息字段中包括站点的标识、资源分配信息、第一指示信息和第二指示信息，所述第一指示信息用于指示所述资源分配信息所指示的资源单元用于设备到设备D2D传输，所述第二指示信息用于指示所述站点为所述D2D传输的发送方或接收方；
    所述接入点发送所述触发帧。
  26. 根据权利要求25所述的方法，其特征在于，所述用户信息字段包括48个比特。
  27. 根据权利要求25或26所述的方法，其特征在于，所述第一指示信息处于所述用户信息字段的第40个比特。
  28. 根据权利要求25～27中任意一项所述的方法，其特征在于，所述第二指示信息处于所述用户信息字段的第46个比特。
  29. 根据权利要求25～28中任意一项所述的方法，其特征在于，所述接入点生成触发帧之前，所述方法还包括：
    所述接入点接收所述站点发送的需求汇报帧，所述需求汇报帧用于指示所述站点有需求进行D2D传输；
    其中，所述需求汇报帧还包括需求汇报信息，所述需求汇报信息包括以下信息中的一项或多项：所述D2D传输的接收方的标识、用于确定所述D2D传输的业务量大小的信息、所述D2D传输的业务类型。
  30. 根据权利要求29所述的方法，其特征在于，所述需求汇报信息承载于所述需求汇报帧的高效控制HE-control字段的控制信息字段中；所述需求汇报帧还包括控制标识，所述控制标识用于指示所述控制信息字段携带D2D传输的需求汇报信息；所述控制标识承载于所述需求汇报帧的高效控制HE-control字段的控制标识字段中。
  31. 根据权利要求29或30所述的方法，其特征在于，所述接入点接收所述站点发送的需求汇报帧之前，所述方法还包括：
    所述接入点向所述站点发送需求汇报触发帧，所述需求汇报触发帧为缓冲区上报触发帧，所述缓冲区上报触发帧中包括第三指示信息，所述第三指示信息用于指示允许所述站点发送D2D传输的需求汇报信息。
  32. 根据权利要求31所述的方法，其特征在于，所述第三指示信息处于所述缓冲区上报触发帧的用户信息字段中的第40个比特。
  33. 一种需求汇报方法，其特征在于，所述方法包括：
    站点生成需求汇报帧，所述需求汇报帧用于指示所述站点有需求进行D2D传输；
    所述站点向接入点发送所述需求汇报帧。
  34. 根据权利要求33所述的方法，其特征在于，所述需求汇报帧包括需求汇报信息，所述需求汇报信息包括以下信息中的一项或多项：D2D传输的接收方的标识、用于确定D2D传输的业务量大小的信息、D2D传输的业务类型。
  35. 根据权利要求34所述的方法，其特征在于，所述需求汇报信息承载于所述需求汇报帧的高效控制HE-control字段的控制信息字段中。
  36. 根据权利要求35所述的方法，其特征在于，所述需求汇报帧还包括控制标识，所述控制标识用于指示所述控制信息字段携带D2D传输的所述需求汇报信息。
  37. 根据权利要求36所述的方法，其特征在于，所述控制标识承载于所述需求汇报帧的高效控制HE-control字段的控制标识字段中。
  38. 根据权利要求33～37中任意一项所述的方法，其特征在于，所述方法还包括：
    所述站点接收所述接入点发送的需求汇报触发帧，所述需求汇报触发帧为缓冲区上报触发帧。
  39. 根据权利要求38所述的方法，其特征在于，所述缓冲区上报触发帧中包括第三指示信息，所述第三指示信息用于指示允许所述站点发送D2D传输的需求汇报帧。
  40. 根据权利要求39所述的方法，其特征在于，所述第三指示信息处于所述缓冲区上报触发帧的用户信息字段的第40个比特。
  41. 一种需求汇报方法，其特征在于，所述方法包括：
    接入点接收站点发送的需求汇报帧，所述需求汇报帧用于指示所述站点有需求进行D2D传输；
    所述接入点生成触发帧，所述触发帧用于触发所述站点进行D2D传输。
  42. 根据权利要求41所述的方法，其特征在于，所述需求汇报帧还包括需求汇报信息，所述需求汇报信息包括以下信息中的一项或多项：D2D传输的接收方的标识、用于确定D2D传输的业务量大小的信息、D2D传输的业务类型。
  43. 根据权利要求42所述的方法，其特征在于，所述需求汇报信息承载于所述需求汇报帧的高效控制HE-control字段的控制信息字段中。
  44. 根据权利要求43所述的方法，其特征在于，所述需求汇报帧还包括控制标识，所述控制标识用于指示所述控制信息字段携带D2D传输的所述需求汇报信息。
  45. 根据权利要求44所述的方法，其特征在于，所述控制标识承载于所述需求汇报帧的高效控制HE-control字段的控制标识字段中。
  46. 根据权利要求41～45中任意一项所述的方法，其特征在于，所述方法还包括：
    所述接入点向所述站点发送需求汇报触发帧，所述需求汇报触发帧为缓冲区上报触发帧。
  47. 根据权利要求46所述的方法，其特征在于，所述缓冲区上报触发帧中包括第三 指示信息，所述第三指示信息用于指示允许所述站点发送D2D传输的需求汇报帧。
  48. 根据权利要求47所述的方法，其特征在于，所述第三指示信息处于所述缓冲区上报触发帧的用户信息字段的第40个比特。
  49. 一种通信装置，其特征在于，所述通信装置包括：
    处理单元，用于生成需求汇报帧，所述需求汇报帧用于指示所述站点有需求进行D2D传输；
    通信单元，用于向接入点发送所述需求汇报帧。
  50. 根据权利要求49所述的通信装置，其特征在于，所述需求汇报帧包括需求汇报信息，所述需求汇报信息包括以下信息中的一项或多项：D2D传输的接收方的标识、用于确定D2D传输的业务量大小的信息、D2D传输的业务类型。
  51. 根据权利要求50所述的通信装置，其特征在于，所述需求汇报信息承载于所述需求汇报帧的高效控制HE-control字段的控制信息字段中。
  52. 根据权利要求51所述的通信装置，其特征在于，所述需求汇报帧还包括控制标识，所述控制标识用于指示所述控制信息字段携带D2D传输的所述需求汇报信息。
  53. 根据权利要求52所述的通信装置，其特征在于，所述控制标识承载于所述需求汇报帧的高效控制HE-control字段的控制标识字段中。
  54. 根据权利要求49～53中任意一项所述的通信装置，其特征在于，所述通信单元，还用于接收所述接入点发送的需求汇报触发帧，所述需求汇报触发帧为缓冲区上报触发帧。
  55. 根据权利要求54所述的通信装置，其特征在于，所述缓冲区上报触发帧中包括第三指示信息，所述第三指示信息用于指示允许所述站点发送D2D传输的需求汇报帧。
  56. 根据权利要求55所述的通信装置，其特征在于，所述第三指示信息处于所述缓冲区上报触发帧的用户信息字段的第40个比特。
  57. 一种需求汇报通信装置，其特征在于，所述通信装置包括：
    通信单元，用于接收站点发送的需求汇报帧，所述需求汇报帧用于指示所述站点有需求进行D2D传输；
    处理单元，用于生成触发帧，所述触发帧用于触发所述站点进行D2D传输。
  58. 根据权利要求57所述的通信装置，其特征在于，所述需求汇报帧还包括需求汇报信息，所述需求汇报信息包括以下信息中的一项或多项：D2D传输的接收方的标识、用于确定D2D传输的业务量大小的信息、D2D传输的业务类型。
  59. 根据权利要求58所述的通信装置，其特征在于，所述需求汇报信息承载于所述需求汇报帧的高效控制HE-control字段的控制信息字段中。
  60. 根据权利要求59所述的通信装置，其特征在于，所述需求汇报帧还包括控制标识，所述控制标识用于指示所述控制信息字段携带D2D传输的所述需求汇报信息。
  61. 根据权利要求60所述的通信装置，其特征在于，所述控制标识承载于所述需求汇报帧的高效控制HE-control字段的控制标识字段中。
  62. 根据权利要求57～61中任意一项所述的通信装置，其特征在于，
    所述通信单元，还用于向所述站点发送需求汇报触发帧，所述需求汇报触发帧为缓冲区上报触发帧。
  63. 根据权利要求62所述的通信装置，其特征在于，所述缓冲区上报触发帧中包括第三指示信息，所述第三指示信息用于指示允许所述站点发送D2D传输的需求汇报帧。
  64. 根据权利要求63所述的通信装置，其特征在于，所述第三指示信息处于所述缓冲区上报触发帧的用户信息字段的第40个比特。
  65. 一种通信装置，所述通信装置包括处理器，当所述处理器执行存储器中的计算机程序时，如权利要求17-24或25～32或33～40或41～48中任意一项所述的方法被执行。
  66. 一种通信装置，其特征在于，包括处理器和存储器；
    所述存储器用于存储计算机执行指令；
    所述处理器用于执行所述存储器所存储的计算机执行指令，以使所述通信装置执行如权利要求17-24或25～32或33～40或41～48中任一项所述的方法。
  67. 一种通信装置，其特征在于，包括处理器、存储器和收发器；
    所述收发器，用于接收信号或者发送信号；
    所述存储器，用于存储计算机程序；
    所述处理器，用于从所述存储器调用所述计算机程序执行如权利要求17-24或25～32或33～40或41～48任一项所述的方法。
  68. 一种通信装置，其特征在于，包括处理器和通信接口；
    所述通信接口，用于接收计算机执行指令并传输至所述处理器；所述处理器运行所述计算机执行指令以执行如权利要求17-24或25～32或33～40或41～48任一项所述的方法。
  69. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储计算机执行指令，当所述计算机执行指令被执行时，使如权利要求17-24或25～3或33～40或 41～48任一项所述的方法被实现。
  70. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机程序，当所述计算机程序被执行时，使如权利要求17-24或25～32或33～40或41～48任一项所述的方法被实现。
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