WO2020192791A1 - 资源配置方法、装置及系统 - Google Patents

资源配置方法、装置及系统 Download PDF

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Publication number
WO2020192791A1
WO2020192791A1 PCT/CN2020/082110 CN2020082110W WO2020192791A1 WO 2020192791 A1 WO2020192791 A1 WO 2020192791A1 CN 2020082110 W CN2020082110 W CN 2020082110W WO 2020192791 A1 WO2020192791 A1 WO 2020192791A1
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WIPO (PCT)
Prior art keywords
terminal device
index
multicast group
multiple indexes
indexes
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PCT/CN2020/082110
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English (en)
French (fr)
Inventor
李翔宇
王君
魏冬冬
肖潇
戴明增
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华为技术有限公司
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Publication of WO2020192791A1 publication Critical patent/WO2020192791A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • 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
    • 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
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • This application relates to the field of communications, and in particular to resource allocation methods, devices and systems.
  • the Internet of Vehicles refers to the interconnection between the vehicle and the outside world through the devices (such as sensors, vehicle terminals, etc.) configured on the vehicle and various communication technologies, such as vehicles and vehicles, vehicles and people, vehicles and roadsides
  • the interconnection and communication of infrastructure, cars and networks can be used in car sharing (car sharing), intelligent network driving (intelligent network driving, IND) and other fields.
  • New radio (NR) V2X can support three communication methods: unicast, multicast and broadcast.
  • Multicast is a communication method in which one sender sends data to multiple receivers.
  • multicast communication Supports hybrid automatic repeat request (HARQ) feedback mechanism, that is, multiple receivers can send feedback information to the sender, and the sender may receive multiple acknowledgements (acknowledgement, ACK) and/or more A negative acknowledgement (NACK).
  • HARQ hybrid automatic repeat request
  • ACK acknowledgements
  • NACK A negative acknowledgement
  • multiple receivers may feed back ACK and/or NACK on the same resource, resulting in conflicts in the ACK and/or NACK feedback of each receiver, and the sender cannot know which one.
  • the receiving end has fed back ACK, which receiving end has fed back NACK.
  • the embodiments of the present application provide a resource configuration method, device, and system, which can avoid feedback conflicts between multiple data receiving ends in multicast communication.
  • a resource configuration method and corresponding communication device are provided.
  • the first terminal device obtains multiple indexes, and any one of the multiple indexes is respectively associated with a terminal device in the first multicast group; wherein, each index in the multiple indexes is used to indicate The hybrid automatic repeat request HARQ feedback resource on the corresponding side link SL, and the HARQ feedback resource indicated by each index is different.
  • the first terminal device sends first indication information and the multiple indexes to the second terminal device, where the first indication information is used to indicate the first index associated with the second terminal device among the multiple indexes, and the second terminal device is the first index. Any terminal device in a multicast group except the first terminal device.
  • the first terminal device can obtain the index associated with each terminal device in the first multicast group, and send to the second terminal device in the first multicast group multiple indexes associated with the first terminal device associated with the second terminal device. index. Therefore, on the one hand, the second terminal device can determine its corresponding HARQ feedback resource. When the second terminal device is used as a data receiver, it can send ACK/NACK on its corresponding HARQ feedback resource, avoiding interference with other data receivers. Feedback conflict. On the other hand, the second terminal device may determine the HARQ feedback resources corresponding to other indexes except the index associated with the second terminal device. When the second terminal device is the data sender, it may correspond to each index The feedback information is received on the HARQ feedback resource of the data receiver, which also avoids feedback conflicts at the data receiving end.
  • obtaining the multiple indexes by the first terminal device includes: the first terminal device generates corresponding indexes for each terminal device in the first multicast group to obtain the multiple indexes.
  • the above-mentioned first terminal device acquiring multiple indexes includes: the first terminal device sends to the network device information about the terminal devices in the first multicast group, for example, the number of terminal devices and/or The identification of the terminal device; the first terminal device receives the above multiple indexes from the network device, wherein the number of the multiple indexes is the same as the number of the terminal devices in the first multicast group, or multiple indexes The number corresponds to the identifier of each terminal device in the first multicast group.
  • the first terminal device allocates each index of the multiple indexes to each terminal device in the first multicast group.
  • the first terminal device sends to the network device information about the terminal devices in the first multicast group, such as the number of terminal devices and/or the identification of the terminal device; the first terminal device receives information from the The above multiple indexes of the network device, wherein the number of the multiple indexes is the same as the number of the terminal devices in the first multicast group, or the number of the multiple indexes is the same as the number of the terminal devices in the first multicast group.
  • the identification of the terminal device corresponds.
  • This scheme can be independent of other schemes and can be implemented as an independent scheme.
  • other solutions can also be combined, for example, so that after the first terminal device receives the multiple indexes, the first terminal device allocates each index of the multiple indexes to each terminal device in the first multicast group .
  • the aforementioned first terminal device obtains multiple indexes, and any one of the multiple indexes is respectively associated with one terminal device in the first multicast group, including: the first terminal device sends to the network device The terminal identification of each terminal device in the first multicast group; the first terminal device receives multiple indexes from the network device, and each index in the multiple indexes is associated with each terminal device in the first multicast group. The terminal ID of each terminal device.
  • the resource configuration method provided in the embodiment of the present application further includes: the first terminal device determines the HAQR feedback resource corresponding to the first terminal device according to the second index associated with the first terminal device; or, The first terminal device determines the HARQ feedback resource corresponding to the terminal device respectively associated with each of the multiple indexes except the second index according to the indexes other than the second index in the multiple indexes.
  • the HARQ feedback resource determined according to the second index is different from the HARQ feedback resource determined by other indexes except the second index, which avoids the interference with other data receiving ends. Feedback conflict.
  • the first terminal device when used as the data sender, it can determine the HARQ feedback resource corresponding to each terminal device, thereby determining which terminal device has fed back ACK and which terminal device has fed back NACK. Further, the first terminal device The data can be re-sent to the terminal device that has fed back the NACK by unicasting, so that the first terminal device does not need to re-send the data through the multicast message, which improves resource utilization and avoids unnecessary reception of the terminal device that has fed back the ACK News.
  • the first terminal device sending the above first indication information to the second terminal device includes: the first terminal device sends a unicast message to the second terminal device, and the unicast message includes the first One instruction information.
  • the first terminal device sending the first indication information to the second terminal device includes: the first terminal device sends the second terminal device the first terminal device associated with each of the multiple indexes. The identification of the terminal device in a multicast group. Based on this solution, since the first terminal device sends the terminal identification of each terminal device associated with the index to the second terminal device, when the second terminal device serves as the data sender, the HARQ feedback resource corresponding to each terminal device can be determined. In this way, it can be determined which terminal device has fed back the ACK and which terminal device has fed back the NACK.
  • the second terminal device can re-send the data to the terminal device that has fed back the NACK by unicasting, so that the second terminal device does not need to pass the group Broadcast messages and resend data, which improves resource utilization and prevents terminal devices that have fed back ACK from receiving unnecessary messages.
  • the first terminal device sends to the second terminal device the identifier of the terminal device in the first multicast group associated with each of the multiple indexes, including: the first terminal device sends The second terminal device sends a unicast message, and the unicast message includes the identification of the terminal device in the first multicast group associated with each of the multiple indexes; or, the first terminal device sends a multicast message, The multicast message includes the identification of the terminal device in the first multicast group associated with each of the multiple indexes; or, the first terminal device sends a broadcast message that includes the information in the multiple indexes The identification of the terminal device in the first multicast group associated with each index.
  • the resource configuration method provided in the embodiment of the present application further includes: the first terminal device determines that there is a terminal device in the first multicast group that leaves the first multicast group Group; or, the first terminal device determines that there is a terminal device joining the first multicast group. Based on this solution, since the first terminal device can retrieve multiple indexes when the group information is updated, the configuration of HARQ feedback resources can adapt to the dynamic changes of the multicast group, and the utilization and reliability of resource configuration are improved.
  • the resource configuration method provided in the embodiment of the present application further includes: the first terminal device sends second indication information to the second terminal device, and the second indication information is used to indicate that the second terminal device is at a specific moment Update the multiple indexes.
  • the second indication information instructs the second terminal device to update multiple indexes at a specific time, it is ensured that other terminal devices in the first multicast group except the first terminal device are updated at the same time, avoiding Due to problems such as time delay, other terminal devices receive multiple updated indexes at different times, so some terminal devices use the index before the update, and some terminal devices use the updated index, thus avoiding the possibility The emergence of HARQ feedback resource conflicts.
  • the first terminal device in the resource configuration method provided in the embodiment of the present application sending the first indication information and multiple indexes to the second terminal device can be replaced by the first terminal device sending the first terminal device to the second terminal device Send the first index associated with the second terminal device.
  • the second terminal device can determine the HARQ feedback resource corresponding to the second terminal device according to the first index, thereby avoiding feedback conflicts with other data receiving ends.
  • a resource configuration method and corresponding communication device receives multiple indexes and the first indication information from the first terminal device, and any one of the multiple indexes is respectively associated with one terminal device in the first multicast group;
  • Each of the two indexes is used to indicate the hybrid automatic repeat request HARQ feedback resource on the corresponding side link SL, and the first indication information is used to indicate the first one of the multiple indexes associated with the second terminal device.
  • the first terminal device and the second terminal device are both in the first multicast group; the second terminal device determines the HARQ feedback resource corresponding to the second terminal device according to the first indication information, and the second terminal device corresponds to The HARQ feedback resource is different from the HARQ feedback resource corresponding to other terminal devices in the first multicast group except for the second terminal device; or, the second terminal device determines according to indexes other than the first index among multiple indexes Each of the multiple indexes except the first index respectively corresponds to HARQ feedback resources, and the HARQ feedback resources corresponding to each index are different.
  • the technical effects brought about by the second aspect can be referred to the technical effects brought about by the above-mentioned first aspect, which will not be repeated here.
  • the second terminal device receiving the first indication information from the first terminal device includes: the second terminal device receives the index associated with each of the multiple indexes from the first terminal device The identification of the terminal device in the first multicast group.
  • the second terminal device determines the HARQ feedback resource corresponding to each of the multiple indexes except the first index, including: the second terminal device according to the multiple indexes except for the first index Other indexes than one index determine the HARQ feedback resource corresponding to the terminal device respectively associated with each index in the other indexes.
  • the second terminal device can re-send the data to the terminal device that has fed back the NACK by unicasting, so that the second terminal device does not need to pass the group Broadcast messages and resend data, which improves resource utilization and prevents terminal devices that have fed back ACK from receiving unnecessary messages.
  • the resource configuration method provided in the embodiment of the present application further includes: the second terminal device receives second indication information from the first terminal device, and the second indication information is used to indicate that the second terminal device The multiple indexes are updated at all times.
  • the second indication information instructs the second terminal device to update multiple indexes at a specific time, it is ensured that other terminal devices in the first multicast group except the first terminal device are updated at the same time, avoiding Due to problems such as time delay, other terminal devices receive multiple updated indexes at different times, so some terminal devices use the index before the update, and some terminal devices use the updated index, thus avoiding the possibility The emergence of HARQ feedback resource conflicts.
  • the first protocol layer entity of the terminal device obtains multiple indexes, and any one of the multiple indexes is respectively associated with a terminal device in the first multicast group; wherein, each index in the multiple indexes They are respectively used to indicate the hybrid automatic repeat request HARQ feedback resource on the corresponding side link SL, the HARQ feedback resource indicated by each index is different, and the terminal device is any terminal device in the first multicast group; terminal;
  • the first protocol layer entity of the device sends first indication information and the multiple indexes to the second protocol layer entity of the terminal device, where the first indication information is used to indicate the first index associated with the terminal device.
  • the second protocol layer entity of the terminal device can determine the HARQ feedback resource corresponding to the terminal device.
  • the terminal device can send ACK/NACK on its corresponding HARQ feedback resource. Avoid feedback conflicts with other data receivers.
  • the second protocol layer entity of the terminal device determines the HARQ feedback resources corresponding to other indexes except the index associated with the terminal device.
  • the terminal device is the data sender, it can correspond to each index. The feedback information is received on the HARQ feedback resource of the data receiver, which also avoids feedback conflicts at the data receiving end.
  • the first protocol layer entity of the terminal device obtains multiple indexes, including: the first protocol layer entity of the terminal device obtains the multiple indexes, and each index in the multiple indexes is associated The terminal identifier of the terminal device in the first multicast group.
  • the first protocol layer entity of the terminal device sends the first indication information to the second protocol layer entity of the terminal device, including: the first protocol layer entity of the terminal device sends the first indication information to the second protocol layer entity of the terminal device.
  • the second protocol layer entity sends the identifier of the terminal device in the first multicast group associated with each of the multiple indexes.
  • the terminal device can retransmit the data to the terminal device that has fed back the NACK by unicasting, so that The terminal device does not need to retransmit data through a multicast message, which improves resource utilization and prevents the terminal device that has fed back the ACK from receiving unnecessary messages.
  • the resource configuration method provided in the embodiment of the present application further includes: the first protocol layer entity of the terminal device determines the first multicast group There is a terminal device leaving the first multicast group; or, the first protocol layer entity of the terminal device determines that there is a terminal device joining the first multicast group. Based on this solution, since the first protocol layer entity of the terminal device can retrieve multiple indexes when the group information is updated, the configuration of HARQ feedback resources can adapt to the dynamic changes of the multicast group, and the utilization and reliability of resource configuration are improved .
  • the resource configuration method provided in the embodiment of the present application further includes: the first protocol layer entity of the terminal device receives the second protocol layer entity from the terminal device.
  • the second indication information of the protocol layer entity is used to indicate that there is a terminal device in the first multicast group to leave the first multicast group; or the second indication information is used to indicate that there is a terminal device to join the first multicast group The first multicast group.
  • the resource configuration method provided in the embodiment of the present application further includes: the first protocol layer entity of the terminal device sends third instruction information to the second protocol layer entity of the terminal device, and the third instruction information is used for Instructing the second protocol layer entity of the terminal device to update the multiple indexes at a specific time.
  • the third indication information instructs the terminal device to update multiple indexes at a specific time, it is ensured that each terminal device in the first multicast group is updated at the same time, and it is avoided that some terminal devices use the pre-update Index, some terminal devices use the updated index, thereby avoiding the problem of HARQ feedback resource conflict that may occur.
  • the foregoing first protocol layer entity includes an application layer entity or a car networking layer entity.
  • the above-mentioned second protocol layer includes an access layer entity.
  • a resource configuration method and corresponding communication device receives multiple indexes and first indication information from the first protocol layer entity of the terminal device, and any one of the multiple indexes is respectively associated with the first multicast group A terminal device of; wherein, each index of the multiple indexes is used to indicate the hybrid automatic repeat request HARQ feedback resource on the corresponding side link SL, and the first indication information is used to indicate the multiple indexes
  • the terminal device is any terminal device in the first multicast group;
  • the second protocol layer entity of the terminal device determines the HARQ corresponding to the terminal device according to the first indication information Feedback resource, the HARQ feedback resource corresponding to the terminal device is different from the HARQ feedback resource corresponding to other terminal devices in the first multicast group except the terminal device; or, the second protocol layer entity of the terminal device is based on the multiple Other indexes in the plurality of indexes except the first index determine the HARQ feedback
  • the second protocol layer entity of the terminal device receives the first indication information from the first protocol layer entity of the terminal device, including: the second protocol layer entity of the terminal device receives the information from the terminal device The identification of the terminal device in the first multicast group associated with each of the multiple indexes of the first protocol layer entity.
  • the second protocol layer entity of the terminal device determines the HARQ feedback resource corresponding to each of the multiple indexes except the first index, including: the second protocol layer entity of the terminal device Determine the HARQ feedback resource corresponding to the terminal device respectively associated with each of the other indexes according to other indexes among the multiple indexes except the first index. Based on this solution, when the terminal device is used as a data sender, it can determine the HARQ feedback resource corresponding to each terminal device, so as to determine which terminal device has fed back ACK and which terminal device has fed back NACK.
  • the terminal device can The terminal device that has fed back the NACK retransmits the data in a unicast manner, so that the terminal device does not need to resend the data through a multicast message, which improves resource utilization and prevents the terminal device that has fed back the ACK from receiving unnecessary messages.
  • the resource configuration method provided in this embodiment of the application further includes: the first protocol layer entity of the terminal device
  • the second protocol layer entity sends second indication information to the first protocol layer entity of the terminal device, where the second indication information is used to indicate that a terminal device in the first multicast group leaves the first multicast group; or, the first multicast group
  • the second indication information is used to indicate that there is a terminal device joining the first multicast group.
  • the second protocol layer entity of the terminal device can notify the first protocol layer entity of the terminal device when the group information is updated, so that the first protocol layer entity of the terminal device can retrieve multiple indexes, so that HARQ
  • the configuration of feedback resources can adapt to the dynamic changes of the multicast group, which improves the utilization and reliability of resource configuration.
  • the resource configuration method provided in the embodiment of the present application further includes: the second protocol layer entity of the terminal device receives third indication information from the first protocol layer entity of the terminal device, and the third indication The information is used to instruct the second protocol layer entity of the terminal device to update the multiple indexes at a specific time.
  • the foregoing first protocol layer entity includes an application layer entity or a car networking layer entity.
  • the above-mentioned second protocol layer includes an access layer entity.
  • a communication device for implementing the above-mentioned various methods.
  • the communication device may be the first terminal device in the foregoing first aspect, such as a vehicle-mounted communication device, or a device including the foregoing first terminal device, such as various types of vehicles, or a device included in the foregoing first terminal device, such as System chip; or, the communication device may be the second terminal device in the second aspect, such as a vehicle-mounted communication device, or a device containing the second terminal device, such as various types of vehicles, or the second terminal device
  • the included device, such as a system chip; or, the communication device may be the terminal device in the third aspect and the fourth aspect, such as an in-vehicle communication device, or a device including the foregoing terminal device, such as various types of vehicles, or the foregoing A device included in a terminal device, such as a system chip.
  • the communication device includes a module, unit, or means corresponding to the foregoing method, and the module, unit, or means can be implemented by hardware, software, or hardware execution of corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above-mentioned functions.
  • a communication device including: a processor, and may also include a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device can execute any of the foregoing Methods.
  • the communication device may be the first terminal device in the foregoing first aspect, such as a vehicle-mounted communication device, or a device including the foregoing first terminal device, such as various types of vehicles, or a device included in the foregoing first terminal device, such as System chip; or, the communication device may be the second terminal device in the above second aspect, such as a vehicle-mounted communication device, or a device containing the above second terminal device, such as various types of vehicles, or the above second terminal device.
  • the included device, such as a system chip; or, the communication device may be the terminal device in the third aspect and the fourth aspect, such as an in-vehicle communication device, or a device including the foregoing terminal device, such as various types of vehicles, or the foregoing A device included in a terminal device, such as
  • a communication device including: a processor; the processor is configured to couple with a memory, and after reading an instruction in the memory, execute the method according to any of the foregoing aspects according to the instruction.
  • the communication device may be the first terminal device in the foregoing first aspect, such as a vehicle-mounted communication device, or a device including the foregoing first terminal device, such as various types of vehicles, or a device included in the foregoing first terminal device, such as System chip; or, the communication device may be the second terminal device in the second aspect, such as a vehicle-mounted communication device, or a device containing the second terminal device, such as various types of vehicles, or the second terminal device.
  • the included device, such as a system chip; or, the communication device may be the terminal device in the third aspect and the fourth aspect, such as an in-vehicle communication device, or a device including the foregoing terminal device, such as various types of vehicles, or the foregoing A device included in a terminal device, such as a system chip.
  • a computer-readable storage medium stores instructions that, when the instructions run on a communication device, enable the communication device to execute the method described in any of the foregoing aspects.
  • the communication device may be the first terminal device in the foregoing first aspect, such as a vehicle-mounted communication device, or a device including the foregoing first terminal device, such as various types of vehicles, or a device included in the foregoing first terminal device, such as System chip; or, the communication device may be the second terminal device in the second aspect, such as a vehicle-mounted communication device, or a device containing the second terminal device, such as various types of vehicles, or the second terminal device.
  • the included device, such as a system chip; or, the communication device may be the terminal device in the third aspect and the fourth aspect, such as an in-vehicle communication device, or a device including the foregoing terminal device, such as various types of vehicles, or the foregoing A device included in a terminal device, such as a system chip.
  • a computer program product containing instructions when the instructions are executed on a communication device, the communication device can execute the method described in any of the above aspects.
  • the communication device may be the first terminal device in the foregoing first aspect, such as a vehicle-mounted communication device, or a device including the foregoing first terminal device, such as various types of vehicles, or a device included in the foregoing first terminal device, such as System chip; or, the communication device may be the second terminal device in the second aspect, such as a vehicle-mounted communication device, or a device containing the second terminal device, such as various types of vehicles, or the second terminal device
  • the included device, such as a system chip; or, the communication device may be the terminal device in the third aspect and the fourth aspect, such as an in-vehicle communication device, or a device including the foregoing terminal device, such as various types of vehicles, or the foregoing A device included in a terminal device, such as a system chip.
  • a communication device for example, the communication device may be a chip or a chip system
  • the communication device includes a processor for implementing the functions involved in any of the above aspects.
  • the communication device further includes a memory for storing necessary program instructions and data.
  • the communication device is a chip system, it may be composed of chips, or may include chips and other discrete devices.
  • the technical effects brought about by any of the design methods of the fifth aspect to the tenth aspect can be referred to the technical effects brought about by different design methods in the first aspect or the second aspect or the third aspect or the fourth aspect. I won't repeat them here.
  • a communication system in an eleventh aspect, includes the first terminal device described in the first aspect and the second terminal device described in the second aspect.
  • FIG. 1 is a schematic diagram of communication in a multicast scenario provided by an embodiment of the application
  • FIG. 2 is a schematic structural diagram of a terminal device provided by an embodiment of the application.
  • FIG. 3 is a schematic diagram of a communication system provided by an embodiment of this application.
  • FIG. 4 is a schematic structural diagram of another terminal device provided by an embodiment of the application.
  • Figure 5 is a first flow chart of a resource configuration method provided by an embodiment of the application.
  • Fig. 6 is a second flowchart of a resource configuration method provided by an embodiment of the application.
  • FIG. 7 is a schematic diagram of another communication system provided by an embodiment of this application.
  • FIG. 8 is a third flowchart of a resource configuration method provided by an embodiment of this application.
  • FIG. 9 is a fourth flowchart of a resource configuration method provided by an embodiment of this application.
  • FIG. 10 is a schematic diagram of the relationship between an index and a terminal identifier provided by an embodiment of this application.
  • FIG. 11 is a fifth flowchart of a resource configuration method provided by an embodiment of this application.
  • FIG. 12 is a sixth flowchart of a resource configuration method provided by an embodiment of this application.
  • FIG. 13 is a seventh flowchart of a resource configuration method provided by an embodiment of this application.
  • FIG. 14 is the eighth flowchart of the resource configuration method provided by an embodiment of this application.
  • FIG. 15 is a ninth flowchart of a resource configuration method provided by an embodiment of this application.
  • FIG. 16 is a schematic structural diagram of a first terminal device according to an embodiment of this application.
  • FIG. 17 is a schematic structural diagram of a second terminal device provided by an embodiment of this application.
  • FIG. 18 is a schematic structural diagram of another terminal device provided by an embodiment of this application.
  • multiple terminal devices may form a multicast group.
  • the multicast group address is the destination address
  • the source of the message is called the data sender
  • the multicast user that receives the multicast data is called the data receiver.
  • the terminal members in a local area network (LAN) group include terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, and terminal 6.
  • LAN local area network
  • the terminal device in the embodiment of the present application may be a vehicle; it may also be a vehicle-mounted terminal installed on the vehicle to assist the vehicle to travel, or a chip in the vehicle-mounted terminal.
  • the vehicle-mounted terminal may be a user equipment (UE), an access terminal, a terminal unit, a terminal station, a mobile station, a mobile station, a remote station, a remote terminal, and a mobile device in a 5G network or a future evolved PLMN.
  • UE user equipment
  • an access terminal a terminal unit
  • a terminal station a mobile station, a mobile station, a remote station, a remote terminal
  • a mobile device in a 5G network or a future evolved PLMN a mobile device in a 5G network or a future evolved PLMN.
  • the access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices or wearable devices, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, industrial control (industrial) Wireless terminal in control), wireless terminal in self-driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety (transportation safety) Terminal, wireless terminal in smart city, wireless terminal in smart home, etc.
  • the vehicle-mounted terminal can be mobile or fixed.
  • the architecture of the terminal device is shown in Figure 2.
  • it includes an access layer entity, a V2X layer entity, and an application layer (application, APP) entity.
  • the access layer entity, the V2X layer entity, and the APP layer entity can be understood as the division of the terminal device from the perspective of logical functions, and are used to implement the functions of the access layer, the V2X layer, and the APP layer, respectively.
  • the entity in this application can be a physical entity or a functional entity.
  • the access layer entity, the V2X layer entity, and the APP layer entity may be understood as a device or a physical entity in the device, and may also be a functional entity, which is not specifically limited in the embodiment of the present application.
  • the access layer entity, the V2X layer entity, and the APP layer entity may be physically separated or deployed together.
  • the access layer entity can be divided according to the protocol layer of the wireless network.
  • the protocol layer of the wireless network For example, the packet data convergence protocol (PDCP) protocol layer, the radio link control (RLC) protocol layer, the media access control (MAC) protocol layer, and the physical (physical, The PHY) protocol layer and other functions are set in the access layer entity.
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC media access control
  • the PHY physical (physical, The PHY) protocol layer and other functions are set in the access layer entity.
  • the division of the access layer entity processing functions according to this protocol layer is only an example, and the division can also be performed in other ways.
  • At least one item (a) refers to any combination of these items, including any combination of a single item (a) or plural items (a).
  • at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • words such as “first” and “second” are used to distinguish the same items or similar items with substantially the same function and effect. Those skilled in the art can understand that words such as “first” and “second” do not limit the quantity and order of execution, and words such as “first” and “second” do not limit the difference.
  • a V2X communication system 10 provided by an embodiment of this application.
  • the communication system 10 may be a multicast group including multiple terminal devices 20.
  • the terminal devices 20 can communicate with each other through the PC5 interface (in Figure 3, only one terminal device 20 communicates with multiple other terminal devices 20 is taken as an example).
  • the PC5 interface is a direct communication interface between terminal devices for The communication link directly connected between terminal devices is called a side link or a side link (SL).
  • terminal devices 20 can also communicate via Uu interfaces.
  • Uu interface communication means that the sender terminal device 20 sends V2X data to the network device through the Uu interface (not shown in Figure 3), and the network device sends V2X data to V2X.
  • the application server (not shown in FIG. 3) performs processing, the V2X application server delivers it to the network device, and sends it to the receiving terminal device through the network device.
  • the first terminal device obtains multiple indexes, and any one of the multiple indexes is respectively associated A terminal device in the first multicast group, each index in the multiple indexes is used to indicate the HARQ feedback resource on the corresponding SL, and the HARQ feedback resource indicated by each index is different;
  • the terminal device sends first indication information and the multiple indexes, where the first indication information indicates the first index associated with the second terminal device among the multiple indexes.
  • the second terminal device After receiving the multiple indexes from the first terminal device and the first indication information, the second terminal device determines the HARQ feedback resource corresponding to the second terminal device according to the first indication information; or, according to the above multiple indexes except the first index For other indexes outside, the HARQ feedback resource corresponding to each other index is determined, wherein the HARQ feedback resource corresponding to each index is different.
  • the specific implementation of this solution will be described in detail in the subsequent method embodiments, and will not be repeated here.
  • the second terminal device can determine its corresponding HARQ feedback resource. When the second terminal device is used as a data receiver, it can send ACK/NACK on its corresponding HARQ feedback resource, avoiding the connection with other data.
  • the second terminal device may determine the HARQ feedback resources corresponding to other indexes except the index associated with the second terminal device.
  • the second terminal device is the data sender, it may correspond to each index
  • the feedback information is received on the HARQ feedback resource of the data receiver, which also avoids feedback conflicts at the data receiving end.
  • the first protocol layer of the second terminal device obtains multiple indexes, and any one of the multiple indexes Are respectively associated with a terminal device in the first multicast group; each index in the multiple indexes is used to indicate the HARQ feedback resource on the corresponding SL, and the HARQ feedback resource indicated by each index is different;
  • the first protocol layer entity sends the first indication information and the multiple indexes to the second protocol layer entity of the second terminal device, where the first indication information is used to indicate the first index associated with the second terminal device.
  • the second protocol layer entity of the second terminal device may determine the HARQ feedback resource corresponding to the second terminal device according to the first indication information; or, the second protocol of the second terminal device
  • the layer entity may determine the HARQ feedback resource corresponding to each of the other indexes according to other indexes besides the foregoing multiple indexes.
  • the HARQ feedback resource corresponding to each index is different, and the second terminal device is any terminal device in the first multicast group.
  • the specific implementation of this solution will be described in detail in the subsequent method embodiments, and will not be repeated here. Based on this solution, on the one hand, the second terminal device can determine its corresponding HARQ feedback resource.
  • the second terminal device When the second terminal device is used as a data receiver, it can send ACK/NACK on its corresponding HARQ feedback resource, avoiding the connection with other data. Feedback from the receiving end conflicts.
  • the second terminal device may determine the HARQ feedback resources corresponding to other indexes except the index associated with the second terminal device. When the second terminal device is the data sender, it may correspond to each index The feedback information is received on the HARQ feedback resource of the data receiver, which also avoids feedback conflicts at the data receiving end.
  • the index in the embodiment of the present application may be an index value or an identifier, or the index in the embodiment of the present application may also be used to indicate the hybrid automatic repeat request HARQ on the side link SL.
  • the information of the feedback resource is described here in a unified manner, and the details are not repeated in the following embodiments.
  • the terminal device 20 in the embodiment of the present application may also be referred to as a communication device, which may be a general-purpose device or a dedicated device, which is not specifically limited in the embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a communication device 30 provided by an embodiment of the application.
  • the communication device 30 includes one or more processors 301, a communication bus 302, and at least one communication interface (in FIG. 4, the communication interface 304 and one processor 301 are taken as an example for illustration), optional
  • the memory 303 may also be included.
  • the processor 301 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the execution of the program of this application. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication bus 302 may be a peripheral component interconnect standard (PCI) bus or an extended industry standard architecture (EISA) bus, etc.
  • PCI peripheral component interconnect standard
  • EISA extended industry standard architecture
  • the bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in FIG. 4 to represent it, but it does not mean that there is only one bus or one type of bus.
  • the communication bus 302 is used to connect different components in the communication device 30 so that different components can communicate.
  • the communication interface 304 may be a transceiver module for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.
  • the transceiver module may be a device such as a transceiver or a transceiver.
  • the communication interface 304 may also be a transceiver circuit located in the processor 301 to implement signal input and signal output of the processor.
  • the memory 303 may be a device having a storage function. For example, it can be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions Dynamic storage devices can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM), or other optical disk storage, optical disc storage ( Including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be stored by a computer Any other media taken, but not limited to this.
  • the memory can exist independently and is connected to the processor through the communication line 302. The memory can also be integrated with the processor.
  • the memory 303 is used to store computer-executed instructions for executing the solution of the present application, and the processor 301 controls the execution.
  • the processor 301 is configured to execute computer-executable instructions stored in the memory 303, so as to implement the resource configuration method provided in the embodiment of the present application.
  • the processor 301 may also perform processing-related functions in the resource configuration method provided in the following embodiments of the present application, and the communication interface 304 is responsible for communicating with other devices or communication networks.
  • the application embodiment does not specifically limit this.
  • the computer-executable instructions in the embodiments of the present application may also be referred to as application program code, which is not specifically limited in the embodiments of the present application.
  • the processor 301 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 4.
  • the communication device 30 may include multiple processors, such as the processor 301 and the processor 308 in FIG. 4. Each of these processors can be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor.
  • the processor here may refer to one or more devices, circuits, and/or processing cores for processing data (for example, computer program instructions).
  • the communication device 30 may further include an output device 305 and an input device 306.
  • the output device 305 communicates with the processor 301 and can display information in a variety of ways.
  • the output device 305 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • the input device 306 communicates with the processor 301 and can receive user input in a variety of ways.
  • the input device 306 may be a mouse, a keyboard, a touch screen device, or a sensor device.
  • an embodiment of the present application provides a resource configuration method.
  • the first terminal device obtains multiple indexes, and each of the multiple indexes is used to indicate the corresponding side link SL.
  • the HARQ feedback resource indicated by each index is different; the first terminal device sends the first indication information and the multiple indexes to the second terminal device, and the first indication information is used to indicate the The first index associated with the second terminal device; or, the first protocol layer entity of the second terminal device obtains the multiple indexes and the first indication information, and sends the multiple indexes and the first indication information to the second terminal device The second protocol layer entity.
  • the second terminal device determines the HARQ feedback resource corresponding to the second terminal device according to the first indication information; or, the second terminal device determines that each of the other indexes corresponds to each of the indexes other than the first index among the multiple indexes
  • the HARQ feedback resource corresponding to each index is different.
  • the second terminal device can determine its corresponding HARQ feedback resource.
  • the second terminal device serves as a data receiver, it can send ACK/NACK on its corresponding HARQ feedback resource, which avoids Conflict with feedback from other data receivers.
  • the second terminal device determines the HARQ feedback resources corresponding to the indexes other than the index associated with the second terminal device.
  • the corresponding HARQ feedback resource can be set in each index. Receiving feedback information on HARQ feedback resources also avoids feedback conflicts at the data receiving end.
  • the resource configuration method provided in the embodiment of the present application will be described in detail below with reference to the communication system shown in FIG. 3 through specific embodiments.
  • the name of the message between each device or the name of each parameter in the message in the following embodiments of the present application is just an example, and other names may also be used in specific implementations, which are not specifically limited in the embodiments of the present application.
  • the interaction messages between the devices in the following embodiments of the present application and the inter-layer interaction messages within the devices can be displayed.
  • the group identifier of the above-mentioned first multicast group is carried either implicitly or implicitly to indicate that each message is used to configure an index for the terminal device in the first multicast group. This will be described in a unified manner, and the following embodiments will not be repeated.
  • the resource configuration method provided by the embodiment of the present application includes the following steps:
  • S501 The first terminal device obtains group information of the first multicast group.
  • the first multicast group is a multicast group in the multicast group in which the first terminal device is located, and the first terminal device may be a head UE in the first multicast group, and the first terminal device
  • the device may be determined by a preset rule when the first multicast group is created, and the embodiment of the present application does not specifically limit the method for determining the first terminal device.
  • the group information of the first multicast group may include the group identity (group ID) of the first multicast group and the terminal identities of all terminal devices in the first multicast group ( user equipment identity, UE ID); or, the group information of the first multicast group may include the group identifier of the first multicast group and the terminals of other terminal devices in the first multicast group except the first terminal device Logo.
  • the group identifier of the first multicast group may be the destination group L2 ID of the first multicast group; the terminal identifier of the terminal device may be the layer 2 identifier of the terminal device or the terminal The layer 1 identifier of the device, which is not specifically limited in the embodiment of this application.
  • the first terminal device obtains the group information of the first multicast group including the following two methods:
  • Method 1 The upper layer entity of the first terminal device (such as the APP layer entity or the V2X layer entity) obtains the group information of the first multicast group, and sends the group information of the first multicast group to the access layer entity of the first terminal device information.
  • the upper layer entity of the first terminal device such as the APP layer entity or the V2X layer entity
  • the upper-layer entity of the first terminal device may create a multicast group.
  • the first terminal device can learn the group information of the first multicast group when it creates the first multicast group .
  • an upper-layer entity of a device other than the first terminal device creates the first multicast group, and determines that the first terminal device is the group head of the first multicast group, so that the upper-layer entity of the first terminal device learns the first multicast group Group information of a multicast group.
  • the upper entity of the first terminal device After obtaining the group information of the first multicast group, the upper entity of the first terminal device sends the group information of the first multicast group to the access stratum (AS) entity of the first terminal device.
  • AS access stratum
  • Method 2 The access layer entity of the first terminal device obtains the group information of the first multicast group.
  • other terminal devices may send a message to the first terminal device requesting to join the first multicast group where the first terminal device is located, and the source address in the message is the terminal requesting to join the first multicast group
  • the terminal ID of the device, and the destination address is the group destination group L2 ID (destination group L2 ID) of the first multicast group.
  • the access layer entity of the first terminal device may send a feedback message to the terminal device that sent the message by unicast or multicast, and the feedback message is used to indicate the first multicast group. Whether the terminal device agrees to the terminal device to join the first multicast group.
  • the access layer entity of the first terminal device can obtain the information of all terminal devices in the first multicast group.
  • the terminal identifier In addition, the first terminal device may obtain the group identifier of the first multicast group when the first multicast group is created. Therefore, the access layer entity of the first terminal device may obtain the group information of the first multicast group.
  • the group destination layer 2 identifier of the first multicast group may be broadcast by the first terminal device in advance through a broadcast message.
  • the first terminal device may explicitly include the group destination layer 2 identifier of the first multicast group in the broadcast message; or, the first terminal device may also include the encrypted group destination layer 2 identifier in the broadcast message, in which In this case, it is possible to prevent a terminal device that receives a broadcast message that explicitly includes the group destination layer 2 identifier from initiating multicast communication without sending a message requesting joining to the first terminal device.
  • the first terminal device obtains multiple indexes according to the group information of the first multicast group.
  • any one of the multiple indexes is respectively associated with a terminal device in the first multicast, and each index of the multiple indexes is used to indicate the data on the SL corresponding to each index.
  • HARQ feedback resources, the HARQ feedback resources indicated by each index are different, and the number of the multiple indexes is the same as the number of terminal devices in the first multicast group.
  • the terminal device in the first multicast group may determine the HARQ feedback resource corresponding to the index according to each index, and the HARQ feedback resource is used for the terminal device on the side link SL Send or receive feedback information. If the terminal device can obtain the association relationship between the index and the terminal device, the terminal device can further determine which terminal device is the user of the HARQ feedback resource determined by each index. Exemplarily, the association relationship between the index and the terminal device may be that index 1 is associated with terminal device 1, and index 2 is associated with terminal device 2, then the HARQ feedback resource determined according to index 1 is used for terminal device 1 to send feedback information on SL, according to The HAQR feedback resource determined by index 2 is used for terminal device 2 to send feedback information on the SL.
  • the association relationship between the index obtained by the terminal device and the terminal device may be a list of the correspondence relationship between the explicit index and the terminal identifier of the terminal device, such as the correspondence table shown in Table 1; or It may also be information that implicitly indicates the corresponding relationship between the index and the terminal identifier of the terminal device.
  • the terminal device can indicate the index through the first 3 bits of byte 1, for example, the first bit of byte 1 is When 1, it means that the index is 1, when the second bit of byte 1 is 1, it means that the index is 2, and when the third bit of byte 1 is 1, it means that the index is 3.
  • the terminal device can indicate the terminal identification of the terminal device associated with each index through other bytes consecutive to byte 1.
  • the terminal identification length of 24 bits (3 bytes) as an example, byte 2 to byte 4 may include the terminal identification 1 of the terminal device 1 corresponding to index 1, byte 5 to byte 7 may include the terminal identification 2 of terminal device 2 corresponding to index 2, and byte 8 to byte 10 may include the terminal corresponding to index 3.
  • association relationship between the index and the terminal device in the embodiment of the present application may be an explicit association relationship list, or it may be implicit information indicating the association relationship between the index and the terminal device. This is a unified description, and the following embodiments will not be repeated.
  • index Index the terminal ID of the associated terminal device Index 1 Terminal ID 1 Index 2 Terminal ID 2 Index 3 Terminal ID 3
  • the first terminal device acquiring multiple indexes according to the group information of the first multicast group includes: the first terminal device generates a corresponding index for each terminal device in the first multicast group, That is, the first terminal device associates each terminal device in the first multicast group with a different index.
  • the first terminal device can distinguish different terminal devices by the terminal identification of the terminal device. Therefore, in fact, the first terminal device generates a corresponding index for each terminal device in the first multicast group, which can be understood as the first terminal device to establish a terminal Correspondence between identification and index.
  • the first multicast group may include 3 terminal devices (one terminal device is the first terminal device), terminal device 1, terminal device 2, terminal device 3, and their corresponding terminal identifiers are terminal identifiers.
  • Terminal ID 2 Terminal ID 3.
  • the first terminal device can generate index 1 for terminal device 1, index 2 for terminal device 2, and index 3 for terminal device 3. That is, terminal ID 1 corresponds to index 1, terminal ID 2 Corresponds to index 2, and terminal identification 3 corresponds to index 3.
  • the multiple indexes mentioned above may be the access layer entity sent to the first terminal device after the configuration of the upper layer entity of the first terminal device is generated; or, it may also be the access layer entity of the first terminal device. If the layer entity configuration is generated, the embodiment of this application does not specifically limit this.
  • the first terminal device sends the first indication information and the foregoing multiple indexes to the second terminal device.
  • the second terminal device receives the first indication information and multiple indexes from the first terminal device.
  • the first indication information is used to indicate the first index associated with the second terminal device among the multiple indexes, and the second terminal device is any terminal device in the first multicast group except the first terminal device.
  • the first terminal device can determine the association relationship between the multiple indexes and the terminal device in the first multicast group; for the second terminal device Since the first terminal device sends multiple indexes, the second terminal device cannot determine the association relationship between each index in the multiple indexes and the terminal device in the first multicast group. Therefore, the first terminal device needs to The second terminal device sends the first indication information, so that the second terminal device determines its associated index.
  • the first terminal device may determine that index 1 is associated with terminal device 1, index 2 is associated with terminal device 2, and index 3 is associated Terminal device 3; but for the second terminal device, the second terminal can only determine that multiple indexes include ⁇ 1,2,3 ⁇ , and cannot determine the association relationship between the three indexes and the terminal device in the first multicast group .
  • the first indication information may explicitly indicate the first index associated with the second terminal device, for example, the first indication information includes the first index; or, the first indication information may also be implicit Indicates the first index associated with the second terminal device.
  • the first indication information may be a number N, indicating that the Nth index among the multiple indexes is the first index associated with the second terminal device, where N is positive Integer.
  • the first terminal device may send the first indication information and multiple indexes to the second terminal device through one message.
  • the first terminal device may use the terminal identifier of the second terminal device to establish a unicast connection with the second terminal device, and send the first indication information and multiple indexes to the second terminal device through a unicast message.
  • the second terminal device may send feedback information to the first terminal device, which is used to indicate whether the second terminal device successfully receives the first indication information and multiple indexes.
  • the first terminal device may send the first indication information and multiple indexes to the second terminal device through two messages respectively.
  • the first terminal device may establish a unicast connection with the second terminal device, and send the first indication information to the second terminal device through a unicast message, and send multiple indexes through a multicast or broadcast message.
  • the second terminal device may send feedback information to the first terminal device for indicating whether the second terminal device successfully receives the first indication information.
  • the first terminal device sends multiple indexes through a multicast message, it can use a PC5 multicast radio resource control (radio resource control, RRC) message (group PC5-RRC) or a user plane multicast message on the control plane.
  • RRC radio resource control
  • the broadcast message may include the group identifier of the first multicast group, and the second terminal device in the first multicast group detects that the broadcast message carries the first group
  • the broadcast message can be received when the group identifier of the group is broadcast, so as to obtain the above multiple indexes.
  • the first terminal device may also send group header information to the second terminal device, where the group header information is used to indicate that the first terminal device is the group header of the first multicast group, and the group header
  • the information may be the terminal identification of the first terminal device, or other information, which is not specifically limited in the embodiment of the present application.
  • the second terminal device receives the first information and/or multiple indexes sent by the group header (the first terminal device) indicated by the group header information, the second terminal device according to the received first indication information and/or multiple indexes Index for subsequent processing; if the second terminal device receives the first indication information and/or multiple indexes sent by other terminal devices in the first multicast group except the group header, the second terminal device can discard the received The first indication information and/or multiple indexes. Since the second terminal device only performs subsequent processing according to the first indication information sent by the group header and multiple indexes, it can be ensured that only the group header in a multicast group can configure indexes for other terminal devices in the multicast group. In this way, there are multiple terminal device configuration indexes in the multicast group, thereby avoiding the problem of index configuration conflicts.
  • the second terminal device after the second terminal device receives the first indication information and multiple indexes from the first terminal device, if the second terminal device serves as the data receiving end in a multicast communication (as shown in Fig. 1 shown in terminal 3), the second terminal device can perform the following step S504a; or, if the second terminal device serves as the data sender in a multicast group communication (terminal 1 shown in FIG. 1), then The second terminal device can execute the following step S504b.
  • step S504a includes:
  • the second terminal device determines the HARQ feedback resource corresponding to the second terminal device according to the first indication information.
  • the HARQ feedback resource corresponding to the second terminal device is different from the HARQ feedback resource corresponding to other terminal devices in the first multicast group except the second terminal device.
  • the second terminal device when it is used as a data receiving end of a multicast communication, it may determine its associated first index according to the first indication information, and determine the HARQ feedback resource through the first index.
  • the second terminal device since the first indication information indicates that the first index is associated with the second terminal device, the second terminal device can determine that the HARQ feedback resource determined according to the first index is the HARQ feedback resource corresponding to the second terminal device. After determining its corresponding HARQ feedback resource, the second terminal device can send an ACK or NACK to the data sending end of the multicast communication on the HARQ feedback resource.
  • the HARQ feedback resource determined according to the first index associated with the second terminal device is different from the HARQ feedback resource determined by other indexes except the first index. Avoid feedback conflicts with other data receivers.
  • the second terminal device may determine the HARQ feedback resource corresponding to the second terminal device according to the first index through a preset rule.
  • the preset rule may be the mapping relationship between the index and the HARQ feedback resource, and the second terminal device may determine the HARQ feedback resource that has a mapping relationship with the first index through the first index; or, the preset rule may be an independent variable
  • the calculation formula of the index is included, and the HARQ feedback resource corresponding to the index can be calculated through an index, and the second terminal device can calculate the corresponding HARQ feedback resource through the first index.
  • the preset rule may be sent by the first terminal device to the second terminal device through a multicast or unicast message, may also be configured by the network device through a system message, or may also be preconfigured by the second terminal device. It should be noted that the preset rule may be associated with the group identifier of the first multicast group, and used to distinguish the rules for determining HARQ feedback resources in different multicast groups.
  • step S504b includes:
  • the second terminal device determines the HARQ feedback resource corresponding to each of the multiple indexes except the first index.
  • the HARQ resource corresponding to each index in the multiple indexes is different.
  • the second terminal device when used as the data sender of a multicast communication, it may determine other indexes besides the first index, and according to each index in the other indexes besides the first index.
  • Each index determines the HARQ feedback resource corresponding to each index.
  • the related description of determining the HARQ feedback resource corresponding to the index according to the index may refer to the description of determining the corresponding HARQ feedback resource by the second terminal device according to the first index in step S504a, which will not be repeated here.
  • the second terminal device can determine that the terminal devices other than the first index after performing step S504b
  • the HARQ feedback resource corresponding to each other index receive the feedback information of this multicast communication on the determined HARQ feedback resource, and can determine whether the feedback on each HARQ feedback resource is ACK or NACK, avoiding data reception Feedback conflicts at the end.
  • the first terminal device after the first terminal device obtains multiple indexes, it sends the first indication information and the multiple indexes to the second terminal device, and each index in the multiple indexes is used to indicate For the HARQ feedback resource on the corresponding side link SL, the HARQ feedback resource indicated by each index is different, and the first indication information is used to indicate the first index associated with the second terminal device among the plurality of indexes;
  • the second terminal device After receiving the first indication information and multiple indexes from the first terminal device, the second terminal device determines the HARQ feedback resource corresponding to the second terminal device according to the first indication information; or, the second terminal device determines the HARQ feedback resource corresponding to the second terminal device according to the multiple indexes.
  • the second terminal device can determine its corresponding HARQ feedback resource.
  • the second terminal device serves as a data receiver, it can send ACK/NACK on its corresponding HARQ feedback resource, which avoids Conflict with feedback from other data receivers.
  • the second terminal device determines the HARQ feedback resources corresponding to the indexes other than the index associated with the second terminal device.
  • the corresponding HARQ feedback resource can be set in each index. Receiving feedback information on HARQ feedback resources also avoids feedback conflicts at the data receiving end.
  • step S502 in FIG. 5 may include steps S5021-S5023; or, step S502 in FIG. 5 may include steps S5024-S5025, where , The specific implementation is shown in Figure 6.
  • the communication system 10 provided in this application further includes a network device 30, as shown in FIG. 7.
  • the network device 30 is a device that connects the terminal device 20 to the wireless network, and may be an evolved base station (evolutional Node B, eNB or eNodeB) in long term evolution (LTE); or fifth ( 3rd generation partnership project, 3GPP) access equipment, etc.
  • eNB evolved Node B
  • LTE long term evolution
  • 3GPP 3rd generation partnership project
  • the base stations in the embodiments of the present application may include various forms of base stations, such as macro base stations, micro base stations (also called small stations), relay stations, access points, etc., which are not specifically limited in the embodiments of the present application .
  • steps S5021-S5023 specifically include:
  • the first terminal device sends the number of terminal devices in the first multicast group to the network device.
  • the first terminal device may obtain the number of terminal devices in the first multicast group when acquiring the group information, and send the number of terminal devices to the network device.
  • the first terminal device receives multiple indexes from the network device.
  • the number of multiple indexes is the same as the number of terminal devices in the first multicast group.
  • the network device may generate an index of the corresponding number for the first multicast group; or, the network device may also store it from it. Select a corresponding number of indexes from the index set of, and send them to the first terminal device, which is not specifically limited in the embodiment of the present application.
  • the first terminal device receives multiple indexes in step S5022, the association relationship between each index in the multiple indexes and the terminal device in the first multicast group cannot be determined. Therefore, the first terminal device Step S5023 needs to be further executed.
  • the first terminal device allocates an index to each terminal device in the first multicast group.
  • the first terminal device may allocate multiple indexes received from the network device to each terminal device in the first multicast group.
  • the multiple indexes received by the first terminal device include ⁇ 4, 5, 6 ⁇
  • the first multicast group includes 3 terminal devices (one of which is the first terminal device), which are respectively the terminal Device 1, terminal device 2, terminal device 3, and their corresponding terminal IDs are terminal ID 1, terminal ID 2, terminal ID 3.
  • the first terminal device can assign index 4 to terminal device 1, and index 5 to terminal Device 2 assigns index 6 to terminal device 3, that is, terminal ID 1 corresponds to index 4, terminal ID 2 corresponds to index 5, and terminal ID 3 corresponds to index 6.
  • steps S5024-S5025 specifically include:
  • the first terminal device sends the terminal identifier of each terminal device in the first multicast group to the network device.
  • the first terminal device may obtain the terminal identification of each terminal device in the first multicast group when acquiring the group information, and send the terminal identification of each terminal device to the network device.
  • the first terminal device receives multiple indexes from the network device.
  • each index in the multiple indexes is associated with the terminal identifier of each terminal device in the first multicast group.
  • the network device may assign a corresponding index to each terminal identifier, and add each The index corresponding to the terminal identifier is sent to the first terminal device. That is, in this case, the index associated with the identity of each terminal device in the first multicast group is allocated by the network device.
  • the network device may explicitly send the index corresponding to each terminal identifier to the first terminal device. For example, one index in the message sent by the network device to the first terminal device corresponds to one terminal identifier.
  • the content of the message may include ⁇ index 1, terminal identity 1; index 2, terminal identity 2; index 3, terminal identity 3 ⁇ ;
  • the network device may also send the mapping relationship shown in Table 1 above to the first terminal device.
  • the network device may also implicitly send the index corresponding to each terminal identifier to the first terminal device.
  • the network device may send the index to the first terminal device in the order of the received terminal identities. After receiving multiple indexes, the first terminal device can determine the terminal identities associated with each index according to the order of the received indexes. , That is, the association between the terminal device and the index can be determined.
  • the sequence of the terminal identification sent by the first terminal device to the network device is ⁇ terminal identification 1, terminal identification 2, terminal identification 3 ⁇ , and the sequence of multiple indexes sent by the network device to the first terminal device is ⁇ 4, 5, 6 ⁇
  • the first terminal device can determine that the terminal ID 1 corresponds to index 4, the terminal ID 2 corresponds to index 5, and the terminal ID 3 corresponds to index 6; or, the network device can also include the implicit indication provided in step S502
  • the index corresponding to each terminal identifier is sent to the first terminal device.
  • step S502 For related description, please refer to step S502, which will not be repeated here.
  • the resource configuration method provided in the embodiment of the present application further includes the step S505a or step S505b, as shown in FIG. 8, in the embodiment of the present application, only the step S505a or step S505b is included after the resource configuration method shown in FIG. 5 as an example for description.
  • the first terminal device may perform the following step S505a; or, if the first terminal device is used in a multicast group communication If a terminal device serves as the data sending end (terminal 1 as shown in FIG. 1), the first terminal device may perform the following step S505b.
  • step S505a includes:
  • the first terminal device determines the HARQ feedback resource corresponding to the first terminal device according to the second index associated with the first terminal device.
  • the HARQ feedback resource corresponding to the first terminal device is different from the HARQ feedback resource corresponding to other terminal devices in the first multicast group except the first terminal device.
  • the first terminal device may determine the association relationship between each index in the multiple indexes and the terminal device in the first multicast group, and the first terminal device receives data as a multicast communication
  • the second index associated with the multiple indexes can be determined
  • the HARQ feedback resource corresponding to the first terminal device can be determined according to the second index
  • the related description of the HARQ feedback resource corresponding to the first terminal device can be determined according to the second index
  • the first terminal device may send an ACK or NACK to the data sending end of the multicast communication on the HARQ feedback resource.
  • the HARQ feedback resource determined according to the second index associated with the first terminal device is different from the HARQ feedback resource determined by other indexes except the second index. Avoid feedback conflicts with other data receivers.
  • step S505b includes:
  • the first terminal device determines the HARQ feedback resource corresponding to the terminal device associated with each index except the second index among the multiple indexes.
  • the HARQ feedback resource corresponding to the terminal device associated with each index is different.
  • the related description of determining the HARQ feedback resource corresponding to the index according to the index may refer to the description of the second terminal device determining the corresponding HARQ feedback resource according to the first index in step S504a, which will not be repeated here. .
  • the first terminal device can determine the association relationship between each index in the multiple indexes and the terminal device in the first multicast group, when the first terminal device serves as the data sender of a multicast communication, on the one hand, it can determine The HARQ feedback resource corresponding to each index except the second index avoids feedback conflicts at the data receiving end. On the other hand, it can also determine which terminal device uses the HARQ feedback resource corresponding to each index, that is, the HARQ feedback resource corresponding to each terminal device, so as to determine which terminal device has fed back ACK and which terminal device has fed back NACK.
  • the first terminal device can re-send data to the terminal device that has fed back the NACK by unicasting, so that the first terminal device does not need to re-send the data through the multicast message, which improves resource utilization and avoids the feedback of ACK Of the terminal device received unnecessary messages.
  • step S503 can be executed first, and then step S505a or S505b can be executed.
  • step S503 in the resource configuration method shown in FIG. 5 or FIG. 6 or FIG. 8 can be replaced with step S503', and accordingly, Step S504b in the resource configuration method shown in FIG. 5 or FIG. 6 or FIG. 8 can be replaced with step S504b'.
  • step S503 in the resource configuration method shown in FIG. 5 is used in the embodiment of the present application.
  • step S503' correspondingly, only replace step S504b with step S504b' in the resource configuration mode shown in FIG. 5 as an example for description.
  • step S503' includes:
  • the first terminal device sends to the second terminal device the terminal identifier of the terminal device associated with each of the multiple indexes and multiple indexes.
  • the second terminal device receives the terminal identifier and the multiple indexes of the terminal device associated with each index in the multiple indexes from the first terminal device.
  • the first terminal device may send multiple indexes and the terminal identification of the terminal device associated with each index in the multiple indexes to the second terminal device through one message.
  • the first terminal device may include multiple indexes and terminal identities of all terminal devices in the first multicast group in one message, where one index corresponds to one terminal identity.
  • the content of the message may include ⁇ index 1, terminal ID 1; index 2, terminal ID 2; index 3, terminal ID 3 ⁇ .
  • the first terminal device may include a mapping relationship between the index and the terminal identifier of the terminal device in a message.
  • the content of the message may include the mapping relationship shown in Table 1.
  • the first terminal device may implicitly indicate the terminal identifier of the terminal device associated with each index. For specific implementation, reference may be made to the relevant description in the foregoing step S502, which will not be repeated here.
  • the first terminal device may send the multiple indexes and the terminal identification of the terminal device associated with each index in the multiple indexes to the second terminal device through two messages respectively.
  • the order of the multiple indexes sent by the first terminal device may correspond to the order of the terminal identification of the terminal device associated with each index.
  • the order in which the first terminal device sends the index through message 1 is ⁇ 1, 2, 3 ⁇
  • the order in which the first terminal device sends the terminal ID through message 2 is ⁇ terminal ID 1, terminal ID 2, terminal ID 3 ⁇ ; among them, there is no inevitable sequence of message 1 and message 2, and message 1 can be sent first and then message 2. Or you can send message 2 first and then send message 1.
  • the second terminal device can determine that index 1 corresponds to terminal ID 1, index 2 according to the received index and terminal ID Corresponds to terminal identification 2, and index 3 corresponds to terminal identification 3.
  • the first terminal device may send multiple indexes through message 1, and send the mapping relationship between indexes and terminal identifiers as shown in Table 1 through message 2.
  • the first terminal device sends multiple indexes and the terminal identifiers corresponding to each index through one message, or sends multiple indexes and each index separately through two messages.
  • the first terminal device can establish a unicast connection with the second terminal device to send the above content; alternatively, the above content can also be sent through a multicast or broadcast message.
  • the above step S503 I won’t repeat it here.
  • the first terminal device may also send group header information to the second terminal device, where the group header information is used to indicate that the first terminal device is the group header of the first multicast group, and the related description may be Refer to the above step S503, which will not be repeated here.
  • step S504b' includes:
  • the second terminal device determines the HARQ feedback resource corresponding to the terminal device associated with each index other than the first index.
  • the second terminal device may determine that each index is associated At this time, the second terminal device can determine the HARQ feedback resource corresponding to each index other than the first index, and can further determine the corresponding terminal device associated with each index other than the first index HARQ feedback resources.
  • the second terminal device can determine the association relationship between each index in the multiple indexes and the terminal device in the first multicast group, when the second terminal device serves as the data sender of a multicast communication, on the one hand, it can determine The HARQ feedback resource corresponding to each index except the first index avoids feedback conflicts at the data receiving end. On the other hand, it can also determine which terminal device uses the HARQ feedback resource corresponding to each index, that is, the HARQ feedback resource corresponding to each terminal device, so as to determine which terminal device has fed back ACK and which terminal device has fed back NACK.
  • the second terminal device can re-send data to the terminal device that has fed back the NACK by unicasting, so that the second terminal device does not need to re-send the data through the multicast message, which improves the resource utilization rate and avoids the feedback of ACK.
  • the terminal device receives unnecessary messages.
  • the terminal devices in the multicast group may change dynamically, for example, there are new terminal devices joining the multicast group or the terminal devices leaving the multicast group
  • the resource configuration method provided in the embodiment of the present application further includes:
  • the first terminal device determines the group information update of the first multicast group may include: the first terminal device determines that there is a terminal device in the first multicast group that has left the first multicast group. A multicast group; or, the first terminal device determines that there is a terminal device newly joining the first multicast group.
  • the first terminal device can determine the update of the group information of the first multicast group through the following two methods:
  • Method 1 The upper-layer entity of the first terminal device determines that the group information of the first multicast group is updated.
  • the upper-layer entity of the first terminal device may obtain an explicit indication information that indicates that the group information of the first multicast group is updated.
  • the upper-layer entity of the first terminal device may Obtain the updated group information of the first multicast group.
  • Method 2 The access layer entity of the first terminal device determines that the group information of the first multicast group is updated.
  • the access layer of the first terminal device can obtain the terminal identifier of the newly joined terminal device. For related description, refer to method 2 in step S501.
  • the terminal device can send a message to the first terminal device to notify it to leave the first multicast group.
  • the access layer entity of the first terminal device can send a message to the The terminal device sends feedback information indicating that it is agreed to leave the first multicast group, and deletes the terminal identifier of the terminal device from the group information of the first multicast group.
  • the first terminal device when it determines that the group information of the first multicast group is updated, it may re-execute the above-mentioned other steps except step S501, that is, the first terminal device may obtain the group information update And send the updated multiple indexes to the second terminal device.
  • the interaction messages between the devices in each step except step S501 may be associated with an update indication information, indicating The content in this message is the content related to the first multicast group and/or the terminal device in the first multicast group after the updated group information of the first multicast group. Since the first terminal device in this application can reacquire multiple indexes when the group information is updated, the configuration of HARQ feedback resources can adapt to dynamic changes of the multicast group, and the utilization and reliability of resource configuration are improved.
  • the first terminal device when it determines that the group information of the first multicast group is updated, it may send second indication information to the second terminal device, and the second indication information may include a specific moment , Instruct the second terminal device to update multiple indexes at a specific time, that is, start to use the multiple indexes re-acquired by the first terminal device at a specific time.
  • the second instruction information can be sent together with the content in the above-mentioned other steps except step S501, or can be sent separately, which is not specifically limited in the embodiment of the present application.
  • the second indication information instructs the second terminal device to update multiple indexes at a specific time, it ensures that other terminal devices in the first multicast group except the first terminal device are updated at the same time, avoiding problems such as time delay As a result, other terminal devices receive the updated multiple indexes at different times, so that some terminal devices use the index before the update, and some terminal devices use the updated index, thus avoiding possible HARQ feedback resources The problem of conflict.
  • the first terminal device may only send to the second terminal device information associated with the second terminal device.
  • the first index the second terminal device may determine its corresponding HARQ feedback resource according to the first index.
  • the first terminal device may also only send multiple indexes to the second terminal device.
  • the first index associated with the second terminal device is indicated by marking (for example, labeling) one of the multiple indexes.
  • the terminal device in the first multicast group may also determine other access layer resources corresponding to each index according to each index, such as a resource pool ( resource pool), transmission resources (such as configured grant), etc.
  • the method for determining other access stratum resources corresponding to the index according to the index may be similar to the method for determining the HARQ feedback resource according to the index, and other methods may also be used, which is not specifically limited in the embodiment of the present application. Since the terminal device can determine other access layer resources according to the index, the resource configuration method provided in this application has a wide range of use and strong versatility.
  • the resource configuration method provided by the embodiment of the present application includes the following steps:
  • the first protocol layer entity of the terminal device obtains group information of the first multicast group.
  • the terminal device is any terminal device in the first multicast group, and the first protocol layer entity includes an application layer entity or a V2X layer entity.
  • step S501 for the related description of the group information of the first multicast group in the embodiment of the present application, reference may be made to the foregoing step S501, which is not repeated here.
  • the first protocol layer entity of the terminal device obtains the group information of the first multicast group including the following two methods:
  • Method 1 The first protocol layer entity of the terminal device directly obtains the group information of the first multicast group.
  • the first protocol layer entity of the terminal device may directly obtain the group information of the first multicast group.
  • Method 2 The first protocol layer entity of the terminal device receives group information from the second protocol layer entity of the terminal device.
  • the second protocol layer entity of the terminal device includes an access layer entity. After obtaining the group information of the first multicast group by the second protocol layer entity of the terminal device, it may send the group information to the first protocol layer entity of the terminal device.
  • the second protocol layer entity of the terminal device For the related description of obtaining group information by the second protocol layer entity of the terminal device, reference may be made to the second method in step S501, which is not repeated here.
  • the first protocol layer entity of the terminal device obtains multiple indexes.
  • any one of the multiple indexes is respectively associated with a terminal device in the first multicast, and each index of the multiple indexes is used to indicate the data on the SL corresponding to each index.
  • HARQ feedback resources, the HARQ feedback resources indicated by each index are different, and the number of the multiple indexes is the same as the number of terminal devices in the first multicast group.
  • the second protocol layer entity of the terminal device in the first multicast group may determine the HARQ feedback resource corresponding to the index according to each index, and the HARQ feedback resource is used for the terminal device in the Send or receive feedback information on the side link SL. If the second protocol layer entity of the terminal device can obtain the association relationship between the index and the terminal device, the second protocol layer entity of the terminal device can further determine which terminal device is the user of the HARQ feedback resource determined by each index.
  • the first protocol layer entity of the terminal device acquires multiple indexes includes: the first protocol layer entity of the terminal device acquires multiple indexes, and the first associated with each index of the multiple indexes The terminal ID of the terminal device in the multicast group.
  • the first protocol layer entity of the terminal device may obtain the association relationship between multiple indexes and the terminal device in the first multicast group.
  • the first protocol layer entity of the terminal device sends the first indication information and the multiple indexes mentioned above to the second protocol layer entity of the terminal device.
  • the second protocol layer entity of the terminal device receives the first indication information and multiple indexes from the first protocol layer entity of the terminal device.
  • the first indication information is used to indicate the first index associated with the terminal device among the multiple indexes.
  • the first protocol layer entity of the terminal device can determine the association relationship between the multiple indexes and the terminal device in the first multicast group ;
  • the second protocol layer entity of the terminal device since the first protocol layer entity of the terminal device sends multiple indexes, the second protocol layer entity of the terminal device cannot determine each index and the first of the multiple indexes The association relationship between terminal devices in a multicast group. Therefore, the first protocol layer entity of the terminal device needs to send the first indication information to the second protocol layer entity of the terminal device so that the second protocol layer entity of the terminal device can determine its The associated index.
  • the second protocol layer entity of the terminal device after the second protocol layer entity of the terminal device receives the first indication information and multiple indexes from the first protocol layer entity of the terminal device, if the terminal device is in a multicast communication As the data receiving end (terminal 3 shown in FIG. 1), the second protocol layer entity of the terminal device can perform the following step S1104a; or, if the terminal device serves as the data sending end in a multicast group communication (such as For the terminal 1) shown in FIG. 1, the second protocol layer entity of the terminal device can execute the following step S1104b.
  • step S1104a includes:
  • the second protocol layer entity of the terminal device determines the HARQ feedback resource corresponding to the terminal device according to the first indication information.
  • the HARQ feedback resource corresponding to the terminal device is different from the HARQ feedback resource corresponding to other terminal devices in the first multicast group except the terminal device.
  • the second protocol layer entity of the terminal device determines the related description of the HARQ feedback resource corresponding to the terminal device according to the first indication information, which may refer to the foregoing step S504a, which will not be repeated here.
  • step S1104b includes:
  • the second protocol layer entity of the terminal device determines the HARQ feedback resource corresponding to each of the multiple indexes except the first index.
  • the HARQ resource corresponding to each index in the multiple indexes is different.
  • the second protocol layer entity of the terminal device determines the relevant description of the HARQ feedback resource corresponding to each index in other indexes except the first index, which may refer to the above step S504a, which will not be repeated here. Repeat.
  • the first protocol layer entity of the terminal device After the first protocol layer entity of the terminal device obtains multiple indexes, it sends the first indication information and the multiple indexes to the second protocol layer entity of the terminal device, and the multiple indexes Each index in the index is used to indicate the HARQ feedback resource on the corresponding side link SL, and the HARQ feedback resource indicated by each index is different.
  • the first indication information is used to indicate that the terminal equipment in the multiple indexes is The associated first index; after receiving the first indication information and multiple indexes, the second protocol layer entity of the terminal device determines the HARQ feedback resource corresponding to the terminal device according to the first indication information; or, the second protocol layer entity of the terminal device
  • the protocol layer entity determines the HARQ feedback resources corresponding to each of the other indexes according to the indexes other than the first index in the foregoing multiple indexes, and the HARQ feedback resources corresponding to each index are different.
  • the second protocol layer entity of the terminal device can determine its corresponding HARQ feedback resource.
  • the terminal device When the terminal device is used as a data receiver, it can send ACK/NACK on its corresponding HARQ feedback resource. , To avoid feedback conflicts with other data receivers.
  • the second protocol layer entity of the terminal device determines the HARQ feedback resources corresponding to other indexes except the index associated with the terminal device. When the terminal device is the data sender, it can correspond to each index. The feedback information is received on the HARQ feedback resource of the data receiver, which also avoids feedback conflicts at the data receiving end.
  • step S1103 in the resource configuration method shown in FIG. 11 can be replaced with step S1103', correspondingly, the resource configuration shown in FIG. Step S1104b in the method can be replaced with step S1104b′, where the specific implementation is shown in FIG. 12.
  • step 1103' includes:
  • the first protocol layer entity of the terminal device sends to the second protocol layer entity of the terminal device the terminal identifier of the terminal device associated with each of the multiple indexes and multiple indexes.
  • the second protocol layer of the terminal device receives the terminal identifier and the multiple indexes of the terminal device associated with each index in the multiple indexes of the terminal device.
  • the first protocol layer entity of the terminal device may send multiple indexes and the terminal identification of the terminal device associated with each of the multiple indexes to the second protocol layer entity of the terminal device through a single message
  • the first protocol layer entity of the terminal device may also send multiple indexes and the terminal identification of the terminal device associated with each index in the multiple indexes to the second protocol layer entity of the terminal device through two messages.
  • the difference in this embodiment from step S503' is that the first protocol layer entity of the terminal device does not send the above information to the second protocol layer entity of the terminal device through unicast, multicast or broadcast.
  • the above steps. S503' will not be repeated here.
  • step S1104b' includes:
  • the second protocol layer entity of the terminal device determines the HARQ feedback resource corresponding to the terminal device associated with each index other than the first index.
  • the second protocol layer of the terminal device determines the relevant description of the HARQ feedback resource corresponding to the terminal device associated with each index other than the first index, which may refer to the above step S504b′, which will not be repeated here.
  • the second protocol layer entity of the terminal device can determine the association relationship between each index in the multiple indexes and the terminal device in the first multicast group, when the terminal device is used as the data sender of a multicast communication, on the one hand ,
  • the HARQ feedback resource corresponding to each index except the first index can be determined to avoid feedback conflicts at the data receiving end. On the other hand, it can also determine which terminal device uses the HARQ feedback resource corresponding to each index, that is, the HARQ feedback resource corresponding to each terminal device, so as to determine which terminal device has fed back ACK and which terminal device has fed back NACK.
  • the second protocol layer entity of the terminal device can re-send data to the terminal device that has fed back the NACK by unicasting, so that the terminal device does not need to re-send the data through a multicast message, which improves resource utilization and avoids The terminal device that has fed back the ACK receives an unnecessary message.
  • the terminal devices in the multicast group may change dynamically, for example, there are new terminal devices joining the multicast group or the terminal devices leaving the multicast group
  • the resource configuration method provided in the embodiment of the present application further includes:
  • the first protocol layer entity of the terminal device determines that there is a terminal device in the first multicast group that leaves the first multicast group; or the first protocol layer entity of the terminal device determines that there is a terminal device to join the first multicast group.
  • the first protocol layer entity of the terminal device may obtain an explicit indication information indicating that the group information of the first multicast group is updated, and at the same time, the first protocol layer entity of the terminal device may obtain the updated The group information of the first multicast group.
  • the resource configuration method provided in the embodiment of the present application further includes:
  • the second protocol layer entity of the terminal device determines the group information update of the first multicast group, where the group information update of the first multicast group includes: the first multicast group exists in the terminal device leaving the first multicast group, or There is a terminal device joining the first multicast group.
  • the group information update of the first multicast group includes: the first multicast group exists in the terminal device leaving the first multicast group, or There is a terminal device joining the first multicast group.
  • the method for determining the update of the group information of the first multicast group by the second protocol layer of the terminal device refer to the related description of the access layer entity of the first terminal device determining the update of the group information of the first multicast group in the foregoing embodiment. , I’m not going to repeat it here; after the second protocol layer entity of the terminal device determines that the group information is updated, it sends second indication information to the first protocol layer entity of the terminal device.
  • the second indication information indicates that the terminal device has left the first group Broadcast group; or, the second indication information indicates that there is a terminal device joining the first multicast group.
  • the second protocol layer entity of the terminal device may also send the updated group information of the first multicast group to the first protocol layer entity of the terminal device.
  • the first protocol layer entity of the terminal device when it determines that the group information of the first multicast group is updated, it may re-execute the above-mentioned other steps except step S1101, that is, the first step of the terminal device
  • the protocol layer entity may obtain the updated multiple indexes of the group information, and send the updated multiple indexes to the second protocol layer entity of the terminal device.
  • each protocol in each step except step S1101 The interaction message between the layers may be associated with an update indication information, indicating that the content in this message is the updated group information of the first multicast group and the terminal device in the first multicast group and/or the first multicast group Related content.
  • the first protocol layer entity of the terminal device in this application can retrieve multiple indexes when the group information is updated, the configuration of HARQ feedback resources can adapt to the dynamic changes of the multicast group, and the utilization and reliability of resource configuration are improved.
  • the first protocol layer entity of the terminal device may send third indication information to the second protocol layer of the terminal device.
  • the third indication may include a specific time, instructing the second protocol layer of the terminal device to update multiple indexes at a specific time, that is, start to use the multiple indexes re-acquired by the first protocol layer entity of the terminal device at a specific time.
  • the third instruction information may be sent together with the content in the foregoing other steps except step S1101, or may be sent separately, which is not specifically limited in the embodiment of the present application. Since the third indication information instructs the second protocol layer of the terminal device to update multiple indexes at a specific time, it is ensured that each terminal device in the first multicast group is updated at the same time, which prevents some terminal devices from using the pre-update Index, some terminal devices use the updated index, thereby avoiding the problem of HARQ feedback resource conflict that may occur.
  • the first protocol layer entity of the terminal device may also send group header information to the second protocol layer entity of the terminal device, where the group header information is used to indicate the group in the first multicast group Header, the group header information may be the terminal identifier of the group header, or other information, which is not specifically limited in the embodiment of the present application. Since the first protocol layer entity of the terminal device can send the group header information to the second protocol layer entity of the terminal device, the terminal device in the first multicast group can all determine the group header of the first multicast group For subsequent processing.
  • the second protocol layer entity of the terminal device may also determine other access layer resources corresponding to each index according to each index, such as resource pool (resource pool). pool), transmission resources (such as configured grant), etc.
  • the method for determining other access stratum resources corresponding to the index according to the index may be similar to the method for determining the HARQ feedback resource according to the index, and other methods may also be used, which is not specifically limited in the embodiment of the present application. Since the second protocol layer entity of the terminal device can determine other access layer resources according to the index, the resource configuration method provided in this application has a wide range of use and strong versatility.
  • the resource configuration method provided by the embodiment of the present application includes the following steps:
  • the first terminal device acquires group information of the first multicast group.
  • the first multicast group is a multicast group in the multicast group in which the first terminal device is located, and the first terminal device may be a head UE in the first multicast group, and the first terminal device
  • the device may be determined by a preset rule when the first multicast group is created, and the embodiment of the present application does not specifically limit the method for determining the first terminal device.
  • the group information of the first multicast group and the related description of obtaining the group information of the first multicast group by the first terminal device may refer to step S501 in the above-mentioned embodiment, which will not be omitted here. Repeat.
  • the first terminal device sends the terminal identifier of each terminal device in the first multicast group to the first network device.
  • the first network device receives the terminal identifier of each terminal device in the first multicast group from the first terminal device.
  • the first terminal device may obtain the terminal identification of each terminal device in the first multicast group when acquiring the group information, and send the terminal identification of each terminal device to the first network device .
  • the first network device may execute the following step S1303 after receiving the terminal identifier of each terminal device in the first multicast group.
  • the first network device allocates an index to each terminal device in the first multicast group to obtain multiple indexes.
  • any one of the multiple indexes is respectively associated with a terminal device in the first multicast, and each index of the multiple indexes is used to indicate the data on the SL corresponding to each index.
  • HARQ feedback resources, the HARQ feedback resources indicated by each index are different, and the number of the multiple indexes is the same as the number of terminal devices in the first multicast group.
  • the first network device may generate a corresponding index for each terminal device, or may collect indexes stored therefrom.
  • An index is selected for each terminal device, which is not specifically limited in the embodiment of this application.
  • the first network device sends the first indication information and the multiple indexes to the second terminal device.
  • the second terminal device receives the first indication information and multiple indexes from the first network device.
  • the first indication information is used to indicate the first index associated with the second terminal device among the multiple indexes
  • the second terminal device is any terminal device in the first multicast group, that is, the second terminal device may be the same as the second terminal device.
  • One terminal device is the same terminal device.
  • the first network device may send the first indication information and multiple indexes to the second terminal device through an RRC message.
  • the first network device may send the first indication information and multiple indexes through one message, or may send the first indication information and multiple indexes through two messages, respectively.
  • the first terminal device please refer to the first terminal device in step S503 above The manner in which the second terminal device sends the first indication information and multiple indexes will not be repeated here.
  • the second terminal device may perform the following step S1305a; or, if the second terminal device serves as the data sender in a multicast group communication (terminal 1 shown in FIG. 1), then The second terminal device may execute the following step S1305b.
  • step S1305a includes:
  • the second terminal device determines the HARQ feedback resource corresponding to the second terminal device according to the first indication information.
  • the HARQ feedback resource corresponding to the second terminal device is different from the HARQ feedback resource corresponding to other terminal devices in the first multicast group except the second terminal device.
  • the second terminal device determines the HARQ feedback resource corresponding to the second terminal device according to the first indication information.
  • the foregoing step S504a refer to the foregoing step S504a, which will not be repeated here.
  • step S1305b includes:
  • the second terminal device determines the HARQ feedback resource corresponding to each of the multiple indexes except the first index.
  • the HARQ resource corresponding to each index in the multiple indexes is different.
  • the second terminal device determines the relevant description of the HARQ feedback resource corresponding to each index except the first index in the foregoing multiple indexes, which may refer to the foregoing step S504b, which is not repeated here.
  • the first network device after obtaining multiple indexes, sends the first indication information and the multiple indexes to the second terminal device, and each index of the multiple indexes is used to indicate For the HARQ feedback resource on the corresponding side link SL, the HARQ feedback resource indicated by each index is different, and the first indication information is used to indicate the first index associated with the second terminal device among the plurality of indexes;
  • the second terminal device After receiving the first indication information and multiple indexes from the first network device, the second terminal device determines the HARQ feedback resource corresponding to the second terminal device according to the first indication information; or, the second terminal device determines the HARQ feedback resource corresponding to the second terminal device according to the multiple indexes.
  • the second terminal device can determine its corresponding HARQ feedback resource.
  • the second terminal device serves as a data receiver, it can send ACK/NACK on its corresponding HARQ feedback resource, which avoids Conflict with feedback from other data receivers.
  • the second terminal device determines the HARQ feedback resources corresponding to the indexes other than the index associated with the second terminal device.
  • the corresponding HARQ feedback resource can be set in each index. Receiving feedback information on HARQ feedback resources also avoids feedback conflicts at the data receiving end.
  • step S1304 in the resource configuration method shown in FIG. 13 can be replaced with step S1304'.
  • the resource configuration shown in FIG. Step S1305b in the method can be replaced with step S1305b', and the specific implementation is shown in FIG. 14.
  • step S1304' includes:
  • the first network device sends to the second terminal device the terminal identifier of the terminal device associated with each index in the multiple indexes and multiple indexes.
  • the second terminal device receives the terminal identifier of the terminal device associated with each index in the multiple indexes from the first network device and the multiple indexes.
  • the first network device may send multiple indexes and the terminal identification of each associated terminal device to the second terminal device through an RRC message or a system broadcast message.
  • the first network device may send multiple indexes and the terminal identification of the terminal device associated with each of the multiple indexes to the second terminal device through one message; or, the first network device may combine multiple indexes and multiple indexes
  • the terminal identification of the terminal device associated with each index in each of the two messages is sent to the second terminal device respectively.
  • step S503' which will not be repeated here.
  • step S1305b' includes:
  • the second terminal device determines the HARQ feedback resource corresponding to the terminal device associated with each index other than the first index.
  • step S504b′ please refer to the above step S504b′, which will not be repeated here.
  • the second terminal device can determine the association relationship between each index in the multiple indexes and the terminal device in the first multicast group, when the second terminal device serves as the data sender of a multicast communication, on the one hand, it can determine The HARQ feedback resource corresponding to each index except the first index avoids feedback conflicts at the data receiving end. On the other hand, it can also determine which terminal device uses the HARQ feedback resource corresponding to each index, that is, the HARQ feedback resource corresponding to each terminal device, so as to determine which terminal device has fed back ACK and which terminal device has fed back NACK.
  • the second terminal device can re-send data to the terminal device that has fed back the NACK by unicasting, so that the second terminal device does not need to re-send the data through the multicast message, which improves the resource utilization rate and avoids the feedback of ACK.
  • the terminal device receives unnecessary messages.
  • the terminal device of the multicast group may change dynamically, for example, there is a new terminal device joining the multicast group or there is a terminal device leaving the multicast group,
  • the resource configuration method provided in the embodiment of the present application further includes:
  • the first terminal device determines the update of the group information of the first multicast group.
  • the update of the group information of the first multicast group determined by the first terminal device reference may be made to the relevant description in the foregoing embodiment, which will not be repeated here.
  • the first terminal device when it determines that the group information of the first multicast group is updated, it may re-execute the above-mentioned other steps except step S1301, that is, the first terminal device may report to the first network The device sends the updated group information.
  • the first network device can obtain multiple indexes after the group information is updated, and send the updated multiple indexes to the second terminal device.
  • each of the above-mentioned indexes except step S1301 The interaction message between each device in the step may be associated with an update indication information, indicating that the content in this message is the updated group information of the first multicast group and the first multicast group and/or the first multicast group.
  • the first network device in this application can reacquire multiple indexes when the group information is updated, the configuration of HARQ feedback resources can adapt to the dynamic changes of the multicast group, and the utilization and reliability of resource configuration are improved.
  • the first network device when it updates multiple indexes, it may send second indication information to the second terminal device, and the second indication information may include a specific moment instructing the second terminal device
  • the multiple indexes are updated at a specific time, that is, the multiple indexes re-acquired by the first network device are used at a specific time.
  • the second instruction information can be sent together with the content in the above-mentioned other steps except step S1301, or can be sent separately, which is not specifically limited in the embodiment of the present application.
  • the second indication information instructs the second terminal device to update multiple indexes at a specific time, it ensures that the terminal devices in the first multicast group update at the same time, and avoids other terminal devices at different times caused by problems such as time delay. After receiving the updated multiple indexes, some terminal devices use the index before the update, and some terminal devices use the updated index, thereby avoiding the problem of HARQ feedback resource conflict that may occur.
  • the second terminal device may also determine other access layer resources corresponding to each index according to each index, such as resource pool and transmission Resources (such as configured grant), etc.
  • the method for determining other access stratum resources corresponding to the index according to the index may be similar to the method for determining the HARQ feedback resource according to the index, and other methods may also be used, which is not specifically limited in the embodiment of the present application. Since the terminal device can determine other access layer resources according to the index, the resource configuration method provided in this application has a wide range of use and strong versatility.
  • the terminal devices in the first multicast group may be under the coverage of different network devices.
  • the resource configuration method shown in FIG. 13 or FIG. 14 further includes steps S1306-S1308a; or, the resource configuration method shown in FIG. 13 or FIG. 14 further includes steps S1306-S1308b, as shown in FIG. 15, in the embodiment of this application, only Take the resource configuration method shown in FIG. 13 as an example for description.
  • the resource configuration method includes:
  • the first network device sends to the second network device the identifier of the terminal device associated with each of the multiple indexes and multiple indexes.
  • the second network device receives the identifier and multiple indexes of the terminal device associated with each index from the first network device.
  • the first network device when the third terminal device in the first multicast group is not within the coverage of the first network device, the first network device may report to the second network device in the third terminal device. Send the identification of the terminal device associated with each index and multiple indexes.
  • the group identification of the first multicast group may be sent, so that the second network device determines that the multiple indexes are The index configured for the terminal device in the first multicast group.
  • the first network device may send the terminal identifier of the terminal device associated with each index and multiple indexes to the second network device through the interface between the network devices.
  • the first network device may send the foregoing information to the second network device through one message, or may send the foregoing information to the second network device through two messages respectively.
  • the foregoing step S503' please refer to the foregoing step S503', which will not be omitted here. Repeat.
  • the second network device sends third indication information and multiple indexes to the third terminal device.
  • the third terminal device receives the third indication information and multiple indexes from the second network device.
  • the third indication information is used to indicate the third index associated with the third terminal device among the multiple indexes.
  • the second network device may send the third indication information and multiple indexes to the third terminal device through an RRC message or to the third terminal device.
  • the second network device may send the third indication information and multiple indexes through one message, or may send the third indication information and multiple indexes through two messages, respectively.
  • the second terminal device may perform the following step S1308a; or, if the third terminal device is used as the data sender in a multicast group communication (terminal 1 shown in FIG. 1), the second terminal device The third terminal device can execute the following step S1308b.
  • step S1308a includes:
  • the third terminal device determines the HARQ feedback resource corresponding to the third terminal device according to the third indication information.
  • the HARQ feedback resource corresponding to the third terminal device is different from the HARQ feedback resource corresponding to other terminal devices in the first multicast group except the third terminal device.
  • the third terminal device for the third terminal device to determine the HARQ feedback resource corresponding to the third terminal device according to the third indication information, reference may be made to the foregoing step S504a, which is not repeated here.
  • step S1308b includes:
  • the third terminal device determines the HARQ feedback resource corresponding to each of the multiple indexes except the third index.
  • the HARQ resource corresponding to each index in the multiple indexes is different.
  • the third terminal device in the embodiment of the present application determines the relevant description of the HARQ feedback resource corresponding to each index except the third index in the foregoing multiple indexes, which may refer to the foregoing step S504b, which is not repeated here.
  • the second network device after obtaining multiple indexes, sends third indication information and the multiple indexes to the third terminal device, and each index in the multiple indexes is used to indicate For the HARQ feedback resource on the corresponding side link SL, the HARQ feedback resource indicated by each index is different, and the third indication information is used to indicate the third index associated with the third terminal device among the plurality of indexes;
  • the third terminal device receives the third indication information and multiple indexes from the second network device, it determines the HARQ feedback resource corresponding to the third terminal device according to the third indication information; or, the third terminal device determines the HARQ feedback resource corresponding to the third terminal device according to the multiple indexes.
  • the third terminal device can determine its corresponding HARQ feedback resource.
  • the third terminal device serves as the data receiver, it can send ACK/NACK on its corresponding HARQ feedback resource, which avoids Conflict with feedback from other data receivers.
  • the third terminal device determines the HARQ feedback resources corresponding to other indexes except the index associated with the third terminal device.
  • the corresponding HARQ feedback resource can be set in each index. Receiving feedback information on HARQ feedback resources also avoids feedback conflicts at the data receiving end.
  • step S1304 can be performed first, then step S1306, or step S1306 can be performed first, and then step S1304 can be performed. It is also possible to execute step S1304 and step S1306 at the same time, which is not specifically limited in the embodiment of the present application.
  • the second network device sending the third indication information to the third terminal device may include: the second network device sends the third terminal device Send the HARQ feedback resource corresponding to the terminal device associated with each index.
  • the foregoing step S1308b may include: the third terminal device determines the HARQ feedback resource corresponding to the terminal device associated with each index except the third index.
  • the third terminal device can determine the association relationship between each index in the multiple indexes and the terminal device in the first multicast group, when the third terminal device is used as the data sender of a multicast communication, on the one hand, it can determine The HARQ feedback resource corresponding to each index except the third index avoids feedback conflicts at the data receiving end. On the other hand, it can also determine which terminal device uses the HARQ feedback resource corresponding to each index, that is, the HARQ feedback resource corresponding to each terminal device, so as to determine which terminal device has fed back ACK and which terminal device has fed back NACK.
  • the third terminal device can re-send data to the terminal device that has fed back the NACK by unicasting, so that the third terminal device does not need to re-send the data through the multicast message, which improves resource utilization and avoids the need to feed back the ACK.
  • the terminal device receives unnecessary messages.
  • fourth indication information and the updated index may be sent to the second network device, and the fourth indication information may include a specific time, Instruct the terminal devices in the first multicast group under the coverage of the second network device to update multiple indexes at a specific time, that is, start to use the multiple indexes re-acquired by the first network device at a specific time.
  • the fourth indication information indicates that the terminal devices in the first multicast group under the coverage of the second network device update multiple indexes at a specific time, it is ensured that the terminal devices in the first multicast group are updated at the same time, which avoids Due to problems such as time delay, other terminal devices receive multiple updated indexes at different times, so some terminal devices use the index before the update, and some terminal devices use the updated index, thus avoiding the possibility The emergence of HARQ feedback resource conflicts.
  • the third terminal device may also determine other access layer resources corresponding to each index according to each index, such as resource pool and transmission Resources (such as configured grant), etc.
  • the method for determining other access stratum resources corresponding to the index according to the index may be similar to the method for determining the HARQ feedback resource according to the index, and other methods may also be used, which is not specifically limited in the embodiment of the present application. Since the terminal device can determine other access layer resources according to the index, the resource configuration method provided in this application has a wide range of use and strong versatility.
  • the methods and/or steps implemented by the terminal device may also be implemented by components (such as chips or circuits) that can be used for the terminal device.
  • an embodiment of the present application also provides a communication device, which is used to implement the foregoing various methods.
  • the communication device may be the first terminal device in the foregoing method embodiment, such as a vehicle-mounted communication device, or a device including the foregoing first terminal device, such as various types of vehicles, or a device included in the foregoing first terminal device, such as System chip; or, the communication device may be the second terminal device in the foregoing method embodiment, such as a vehicle-mounted communication device, or a device containing the foregoing second terminal device, such as various types of vehicles, or the foregoing second terminal device.
  • the included device, such as a system chip; or, the communication device may be the terminal device in the above method embodiment, such as a vehicle-mounted communication device, or a device containing the above terminal device, such as various types of vehicles, or the above terminal device includes Devices, such as system chips.
  • the communication device includes modules, units, or means corresponding to the above methods, and the modules, units, or means can be implemented by hardware, software, or hardware.
  • the hardware or software includes one or more modules or units corresponding to the above-mentioned functions. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiments of the present application may divide the communication device into functional modules according to the foregoing method embodiments.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 16 shows a schematic structural diagram of a first terminal device 160.
  • the first terminal device 160 includes a processing module 1601 and a transceiver module 1602.
  • the transceiver module 1602 may also be referred to as a transceiver unit to implement sending and/or receiving functions, for example, may be a transceiver circuit, transceiver, transceiver or communication interface.
  • the processing module 1601 is configured to obtain multiple indexes, and any one of the multiple indexes is respectively associated with a terminal device in the first multicast group; wherein, each index in the multiple indexes is used to indicate The HARQ feedback resource on the corresponding SL, the HARQ feedback resource indicated by each index is different; the processing module 1601 is further configured to send the first indication information and the multiple indexes to the second terminal device through the transceiver module 1602, the first The indication information is used to indicate the first index associated with the second terminal device among the multiple indexes, and the second terminal device is any terminal device in the first multicast group except the first terminal device.
  • the processing module 1601 is configured to obtain multiple indexes, including: the processing module 1601 is configured to generate corresponding indexes for each terminal device in the first multicast group to obtain multiple indexes.
  • the processing module 1601 is configured to obtain multiple indexes, including: a processing module 1601, configured to send the number of terminal devices in the first multicast group to the network device through the transceiver module 1602; the processing module 1601 is also configured to The foregoing multiple indexes from the network device are received through the transceiver module 1602, where the number of the multiple indexes is the same as the number of terminal devices in the first multicast group.
  • the processing module 1601 is further configured to allocate each of the multiple indexes to each terminal device in the first multicast group.
  • the processing module 1601 is configured to obtain multiple indexes, and any one of the multiple indexes is respectively associated with a terminal device in the first multicast group.
  • the processing module 1601 includes: The network device sends the terminal identification of each terminal device in the first multicast group; the processing module 1601 is further configured to receive the foregoing multiple indexes from the network device through the transceiver module 1602, and each of the multiple indexes is associated with the first The terminal identifier of each terminal device in the multicast group.
  • the processing module 1601 is further configured to determine the HAQR feedback resource corresponding to the first terminal device according to the second index associated with the first terminal device; or, the processing module 1601 is further configured to determine the HAQR feedback resource corresponding to the first terminal device according to the Other indexes except the second index determine the HARQ feedback resource corresponding to the terminal device respectively associated with each of the indexes except the second index.
  • the processing module 1601 is configured to send first indication information to the second terminal device through the transceiver module 1602, and includes: a processing module 1601, configured to send a unicast message to the second terminal device through the transceiver module 1602, the unicast The message includes the first indication information.
  • the processing module 1601 is configured to send first indication information to the second terminal device through the transceiver module 1602, and includes: a processing module 1601, configured to send each of the above multiple indexes to the second terminal device through the transceiver module 1602 The identification of the terminal device in the first multicast group associated with each index.
  • the processing module 1601 is configured to send the identification of the terminal device in the first multicast group associated with each of the multiple indexes to the second terminal device through the transceiver module 1602, including: a processing module 1601, Send a unicast message to the second terminal device through the transceiver module 1602, where the unicast message includes the identification of the terminal device in the first multicast group associated with each of the multiple indexes; or, the processing module 1601 , Used to send a multicast message through the transceiver module 1602, the multicast message including the identifier of the terminal device in the first multicast group associated with each of the multiple indexes; or, the processing module 1601, used to A broadcast message is sent through the transceiver module 1602, and the broadcast message includes the identification of the terminal device in the first multicast group associated with each of the multiple indexes.
  • the processing module 1601 is further configured to determine that a terminal device in the first multicast group has left the first multicast group; or, the processing module 1601 is further configured to determine that a terminal device exists to join the first multicast group.
  • the processing module 1601 is further configured to send second indication information to the second terminal device through the transceiver module 1602, where the second indication information is used to instruct the second terminal device to update the multiple indexes at a specific moment.
  • the processing module 1601 is used to receive the above information or message through the transceiver module 1602. It can be understood that the transceiver module 1602 receives the signal carrying the above information or message sent by the outside world, and then sends it to the processing module with or without signal processing. 1601 processing.
  • the processing module 1601 is configured to receive the above information or message through the transceiver module 1602. It can be understood that the transceiver module 1602 receives the signal carrying the above information or message sent from the outside world, and then sends it to The processing module 1601 processes. This is a unified description, and will not be repeated here.
  • the first terminal device 160 is presented in the form of dividing various functional modules in an integrated manner.
  • the "module” here can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above-mentioned functions.
  • the first terminal device 160 may adopt the form of the communication device 30 shown in FIG. 4.
  • the processor 301 in the communication device 30 shown in FIG. 4 may invoke the computer execution instructions stored in the memory 303 to make the communication device 30 execute the resource configuration method in the foregoing method embodiment.
  • the functions/implementation process of the processing module 1601 and the transceiver module 1602 in FIG. 16 may be implemented by the processor 301 in the communication device 30 shown in FIG. 4 calling a computer execution instruction stored in the memory 303.
  • the function/implementation process of the processing module 1601 in FIG. 16 can be implemented by the processor 301 in the communication device 30 shown in FIG. 4 calling a computer execution instruction stored in the memory 303, and the function of the transceiver module 1602 in FIG. /The realization process can be realized through the communication interface 304 in the communication device 30 shown in FIG. 4.
  • the first terminal device 160 provided in this embodiment can execute the above-mentioned resource configuration method, the technical effects that can be obtained can refer to the above-mentioned method embodiment, which will not be repeated here.
  • FIG. 17 shows a schematic structural diagram of a second terminal device 170.
  • the second terminal device 170 includes a processing module 1701 and a transceiver module 1702.
  • the transceiver module 1702 may also be referred to as a transceiver unit to implement sending and/or receiving functions, for example, it may be a transceiver circuit, transceiver, transceiver or communication interface.
  • the processing module 1701 is configured to receive multiple indexes and first indication information from the first terminal device through the transceiver module 1702, and any one of the multiple indexes is respectively associated with a terminal device in the first multicast group; Wherein, each index in the multiple indexes is used to indicate the HARQ feedback resource on the corresponding SL, the first indication information is used to indicate the first index associated with the second terminal device among the multiple indexes, and the first index A terminal device and the second terminal device are both in the first multicast group; the processing module 1701 is further configured to determine the HARQ feedback resource corresponding to the second terminal device according to the first indication information, and the second terminal device corresponds to The HARQ feedback resource in the first multicast group is different from the HARQ feedback resource corresponding to other terminal devices in the first multicast group except the second terminal device; or, the processing module 1701 is further configured to perform according to the multiple indexes except for the first terminal device. For other indexes other than the index, the HARQ feedback resource corresponding to each of the
  • the processing module 1701 is configured to receive the first indication information from the first terminal device through the transceiver module 1702, and includes: the processing module 1701, configured to receive information from multiple indexes from the first terminal device through the transceiver module 1702 The identification of the terminal device in the first multicast group associated with each index.
  • the processing module 1701 is configured to determine the HARQ feedback resources corresponding to each of the multiple indexes except the first index, and includes: a processing module 1701, configured to determine the HARQ feedback resource according to the multiple indexes except the first index Other indexes other than the first index determine the HARQ feedback resource corresponding to the terminal device respectively associated with each index in the other indexes.
  • the processing module 1701 is further configured to receive second indication information from the first terminal device through the transceiver module 1702, where the second indication information is used to instruct the second terminal device to update the multiple indexes at a specific moment.
  • the processing module 1701 is used to receive the above information or message through the transceiver module 1702. It can be understood that the transceiver module 1702 receives the signal carrying the above information or message sent by the outside world, and then sends it to the processing module with or without signal processing. 1701 processing. Or, in the embodiment of the present application, the processing module 1701 is configured to receive the above information or message through the transceiver module 1702. It can be understood that the transceiver module 1702 receives the signal carrying the above information or message sent by the outside world, and then sends it to The processing module 1701 processes. This is a unified description, and will not be repeated here.
  • the second terminal device 170 is presented in the form of dividing various functional modules in an integrated manner.
  • the "module” here can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above-mentioned functions.
  • the second terminal device 170 may take the form of the communication device 30 shown in FIG. 4.
  • the functions/implementation process of the processing module 1701 and the transceiver module 1702 in FIG. 17 may be implemented by the processor 301 in the communication device 30 shown in FIG. 4 calling the computer execution instructions stored in the memory 303.
  • the function/implementation process of the processing module 1701 in FIG. 17 can be implemented by the processor 301 in the communication device 30 shown in FIG. 4 calling a computer execution instruction stored in the memory 303, and the function of the transceiver module 1702 in FIG. /The realization process can be realized through the communication interface 304 in the communication device 30 shown in FIG. 4.
  • the second terminal device 170 provided in this embodiment can perform the above-mentioned resource configuration method, the technical effects that can be obtained can refer to the above-mentioned method embodiment, and will not be repeated here.
  • FIG. 18 shows a schematic structural diagram of a terminal device 180.
  • the terminal device 180 includes a processing module 1801 and a transceiver module 1802.
  • the transceiver module 1802 may also be referred to as a transceiver unit to implement sending and/or receiving functions, for example, may be a transceiver circuit, a transceiver, a transceiver or a communication interface.
  • the processing module 1801 is used for the first protocol layer entity of the terminal device to obtain multiple indexes, and any one of the multiple indexes is respectively associated with one of the first multicast groups.
  • Terminal equipment wherein each index of the multiple indexes is used to indicate the HARQ feedback resource of the hybrid automatic repeat request on the corresponding side link SL, and the HARQ feedback resource indicated by each index is different, the terminal equipment Is any terminal device in the first multicast group; the processing module 1801 is also used for the first protocol layer entity of the terminal device to send the first indication information and the first protocol layer entity to the second protocol layer entity of the terminal device through the transceiver module 1802 The multiple indexes, and the first indication information is used to indicate the first index associated with the terminal device.
  • the processing module 1801 for the first protocol layer entity of the terminal device to obtain multiple indexes includes: a processing module 1801 for the first protocol layer entity of the terminal device to obtain the multiple indexes and the multiple indexes The terminal identifier of the terminal device in the first multicast group associated with each index in the two indexes.
  • the processing module 1801, used for the first protocol layer entity of the terminal device to send first indication information to the second protocol layer entity of the terminal device through the transceiver module 1802, includes: a processing module 1801, used for the terminal device The first protocol layer entity of the terminal device sends the identification of the terminal device in the first multicast group associated with each of the multiple indexes to the second protocol layer entity of the terminal device through the transceiver module 1802.
  • the processing module 1801 is also used for the first protocol layer entity of the terminal device to determine that there is a terminal device in the first multicast group leaving the first multicast group; or, the processing module 1801 is also used for the terminal The first protocol layer entity of the device determines that there is a terminal device joining the first multicast group.
  • the processing module 1801 is further used for the first protocol layer entity of the terminal device to receive second indication information from the second protocol layer entity of the terminal device through the transceiver module 1802, and the second indication information is used to indicate the There is a terminal device in the first multicast group that leaves the first multicast group; or, the second indication information is used to indicate that there is a terminal device to join the first multicast group.
  • the processing module 1801 is further used for the first protocol layer entity of the terminal device to send third instruction information to the second protocol layer entity of the terminal device through the transceiver module 1802, and the third instruction information is used to instruct the terminal
  • the second protocol layer entity of the device updates the multiple indexes at a specific time.
  • the processing module 1801 the second protocol layer entity for the terminal device receives multiple indexes and first indication information from the first protocol layer entity of the terminal device through the transceiver module 1802 , Any one of the multiple indexes is respectively associated with a terminal device in the first multicast group; wherein, each of the multiple indexes is used to indicate the hybrid automatic reset on the corresponding side link SL.
  • the first indication information is used to indicate the first index associated with the terminal device among the multiple indexes, and the terminal device is any terminal device in the first multicast group; processing module 1801,
  • the second protocol layer entity also used for the terminal device determines the HARQ feedback resource corresponding to the terminal device according to the first indication information, and the HARQ feedback resource corresponding to the terminal device is the same as the one in the first multicast group except the terminal device.
  • the HARQ feedback resources corresponding to other terminal devices are different; or, the processing module 1801 is also used for the second protocol layer entity of the terminal device to determine the multiple indexes according to the multiple indexes other than the first index.
  • Each of the indexes except the first index corresponds to the HARQ feedback resource respectively, and the HARQ feedback resource corresponding to each index is different.
  • the processing module 1801, used for the second protocol layer entity of the terminal device to receive the first indication information from the first protocol layer entity of the terminal device through the transceiver module 1802, includes: a processing module 1801, used for the terminal The second protocol layer entity of the device receives through the transceiver module 1802 the identification of the terminal device in the first multicast group associated with each of the multiple indexes of the first protocol layer entity of the terminal device.
  • the processing module 1801 configured for the second protocol layer entity of the terminal device to determine the HARQ feedback resource corresponding to each of the multiple indexes except the first index, includes: a processing module 1801, The second protocol layer entity for the terminal device determines the HARQ feedback resource corresponding to the terminal device respectively associated with each of the other indexes according to other indexes in the multiple indexes except the first index.
  • the processing module 1801 is further used for the second protocol layer entity of the terminal device to send second indication information to the first protocol layer entity of the terminal device through the transceiver module 1802, and the second indication information is used to indicate the first protocol layer entity of the terminal device.
  • a terminal device in a multicast group leaves the first multicast group; or, the second indication information is used to indicate that a terminal device joins the first multicast group.
  • the processing module 1801 is further used for the second protocol layer entity of the terminal device to receive third indication information from the first protocol layer entity of the terminal device through the transceiver module 1802, and the third indication information is used to indicate the The second protocol layer entity of the terminal device updates the multiple indexes at a specific time.
  • the processing module 1801 is configured to receive the above information or message through the transceiver module 1802. It can be understood that the transceiver module 1802 receives the signal carrying the above information or message sent by the outside world, and then sends it to the processing module with or without signal processing. 1801 processing. Or, in the embodiment of the present application, the processing module 1801 is configured to receive the above information or message through the transceiver module 1802. It can be understood that the transceiver module 1802 receives the signal carrying the above information or message sent by the outside world, and then sends it to The processing module 1801 processes. This is a unified description, and will not be repeated here.
  • the terminal device 180 is presented in the form of dividing various functional modules in an integrated manner.
  • the "module” here can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above-mentioned functions.
  • the terminal device 180 may adopt the form of the communication device 30 shown in FIG. 4.
  • the functions/implementation process of the processing module 1801 and the transceiving module 1802 in FIG. 18 may be implemented by the processor 301 in the communication device 30 shown in FIG. 4 calling a computer execution instruction stored in the memory 303.
  • the function/implementation process of the processing module 1801 in FIG. 18 can be implemented by the processor 301 in the communication device 30 shown in FIG. 4 calling a computer execution instruction stored in the memory 303, and the function of the transceiver module 1802 in FIG. /The realization process can be realized through the communication interface 304 in the communication device 30 shown in FIG. 4.
  • the terminal device 180 provided in this embodiment can execute the above-mentioned resource configuration method, the technical effects that can be obtained can refer to the above-mentioned method embodiment, which will not be repeated here.
  • an embodiment of the present application further provides a computer-readable storage medium, which stores instructions in the computer-readable storage medium.
  • the communication device can execute any of the above The method described in the aspect.
  • an embodiment of the present application further provides a computer program product containing instructions, which when the instructions run on the communication device described above, enable the communication device to execute the method described in any of the foregoing aspects.
  • an embodiment of the present application further provides a communication device (for example, the communication device may be a chip or a chip system), the communication device includes a processor, and is configured to implement the method in any of the foregoing method embodiments. .
  • the communication device further includes a memory.
  • the memory is used to store necessary program instructions and data, and the processor can call the program code stored in the memory to instruct the communication device to execute the method in any of the foregoing method embodiments.
  • the memory may not be in the communication device.
  • the communication device is a chip system, it may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiment of the present application.
  • the communication device does not necessarily include a memory, and the communication device can execute corresponding functions by calling instructions in the external memory; or, the corresponding program instructions can be loaded into the communication device at a later stage In the memory of the processor, it can be called by the processor to perform corresponding operations.
  • the computer may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • a software program it may be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or may include one or more data storage devices such as servers and data centers that can be integrated with the medium.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).
  • the computer may include the aforementioned device.

Abstract

本申请实施例提供资源配置方法、装置及系统，可应用于涉及车辆驾驶的系统，比如自动驾驶系统或V2X系统。该方法包括：第一终端设备获取多个索引；第一终端设备向第二终端设备发送第一指示信息和该多个索引，该第一指示信息用于指示与第二终端设备关联的第一索引。其中，该多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；该多个索引中的每个索引分别用于指示对应的SL上的HARQ反馈资源，该每个索引指示的HARQ反馈资源不同。第二终端设备根据该第一指示信息确定第二终端设备对应的HARQ反馈资源，或者第二终端设备确定除第一索引之外的其他每个索引对应的HARQ反馈资源。基于该方案，可以解决多个数据接收端的反馈冲突的问题。

Description

资源配置方法、装置及系统
本申请要求于2019年3月28日提交国家知识产权局、申请号为201910245335.2、申请名称为“资源配置方法、装置及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，尤其涉及资源配置方法、装置及系统。
背景技术
车联网(vehicle to everything，V2X)指通过配置在车辆上的装置(如传感器、车载终端等)以及各种通信技术实现车与外界的互联，如车与车、车与人、车与路边基础设施、车与网络等的互联通信，可用于汽车共享(car sharing)、智能网联驾驶(intelligent network driving，IND)等领域。
新无线电(new radio，NR)V2X中，可以支持单播、组播和广播三种通信方式，组播是由一个发送端向多个接收端发送数据的通信方式，在NR V2X中组播通信支持混合自动重传请求(hybrid automatic repeat request，HARQ)反馈机制，即多个接收端均可以向发送端发送反馈信息，发送端可能会收到多个肯定应答(acknowledgement，ACK)和/或多个否定应答(negative acknowledgement，NACK)。
然而，现有组播通信的HARQ反馈机制中，多个接收端可能会在相同的资源上反馈ACK和/或NACK，导致每个接收端的ACK和/或NACK反馈冲突，发送端也无法知道哪个接收端反馈了ACK，哪个接收端反馈了NACK。
发明内容
本申请实施例提供一种资源配置方法、装置、系统，可以避免组播通信中多个数据接收端的反馈冲突。
为达到上述目的，本申请的实施例采用如下技术方案：
第一方面，提供了一种资源配置方法及相应的通信装置。该方案中，第一终端设备获取多个索引，该多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，该多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自动重传请求HARQ反馈资源，该每个索引指示的HARQ反馈资源不同。第一终端设备向第二终端设备发送第一指示信息和上述多个索引，该第一指示信息用于指示多个索引中与第二终端设备关联的第一索引，该第二终端设备为第一组播组中除第一终端设备之外的任意一个终端设备。基于该方案，第一终端设备可以获取第一组播组中每个终端设备关联的索引，并向第一组播组中的第二终端设备发送多个索引和第二终端设备关联的第一索引。因此，一方面，第二终端设备可以确定其对应的HARQ反馈资源，当第二终端设备作为数据接收端时，可以在其对应的HARQ反馈资源上发送ACK/NACK，避免了与其他数据接收端的反馈冲突。另一方面，第二终端设备可以确定除与该第二终端设备相关联的索引之外的其他索引分别对应的HARQ反馈资源，当第二终端设备为数据发送端时，可以在每个索引对应的HARQ反馈资源上接收反馈信 息，也避免了数据接收端的反馈冲突。
在一种可能的设计中，上述第一终端设备获取多个索引，包括：第一终端设备分别为第一组播组中的每个终端设备生成对应的索引，得到多个索引。
在一种可能的设计中，上述第一终端设备获取多个索引，包括：第一终端设备向网络设备发送第一组播组中终端设备的信息，比如可以是终端设备的个数和/或终端设备的标识；该第一终端设备接收来自该网络设备的上述多个索引，其中，多个索引的个数与所述第一组播组中终端设备的个数相同，或者，多个索引的个数与所述第一组播组中各终端设备的标识相对应。一种可能的实现方式中，第一终端设备接收到该多个索引后，第一终端设备将该多个索引中的每个索引分配给第一组播组中的每个终端设备。
可以理解的是，本申请中，第一终端设备向网络设备发送第一组播组中终端设备的信息，比如终端设备的个数和/或终端设备的标识；该第一终端设备接收来自该网络设备的上述多个索引，其中，多个索引的个数与所述第一组播组中终端设备的个数相同，或者，多个索引的个数与所述第一组播组中各终端设备的标识相对应。该方案可以不依赖于其他方案，可作为独立的方案执行。当然，也可以结合其他方案，比如以便于第一终端设备接收到该多个索引后，第一终端设备将该多个索引中的每个索引分配给第一组播组中的每个终端设备。
在一种可能的设计中，上述第一终端设备获取多个索引，该多个索引中的任意一个索引分别关联第一组播组中的一个终端设备，包括：第一终端设备向网络设备发送所述第一组播组中每个终端设备的终端标识；第一终端设备接收来自该网络设备的多个索引，该多个索引中的每个索引关联所述第一组播组中的每个终端设备的终端标识。
在一种可能的设计中，本申请实施例提供的资源配置方法还包括：第一终端设备根据与该第一终端设备关联的第二索引，确定第一终端设备对应的HAQR反馈资源；或者，第一终端设备根据多个索引中除第二索引之外的其他索引，确定多个索引中除第二索引之外的其他每个索引分别关联的终端设备对应的HARQ反馈资源。基于该方案，一方面，第一终端设备作为数据接收端时，根据第二索引确定的HARQ反馈资源与除第二索引之外的其他索引确定的HARQ反馈资源不同，避免了与其他数据接收端的反馈冲突。另一方面，第一终端设备作为数据发送端时，可以确定每个终端设备对应的HARQ反馈资源，从而可以确定哪个终端设备反馈了ACK，哪个终端设备反馈了NACK，进一步地，第一终端设备可以对反馈了NACK的终端设备通过单播的方式重新发送数据，从而使第一终端设备不用通过组播消息重新发送数据，提升了资源利用率，避免了反馈了ACK的终端设备收到不必要的消息。
在一种可能的设计中，第一终端设备向第二终端设备发送上述第一指示信息，包括：第一终端设备向第二终端设备发送单播消息，所述单播消息中包括所述第一指示信息。
在一种可能的设计中，第一终端设备向第二终端设备发送上述第一指示信息，包括：第一终端设备向第二终端设备发送上述多个索引中的每个索引关联的所述第一组播组中的终端设备的标识。基于该方案，由于第一终端设备向第二终端设备发送每个索引关联的终端设备的终端标识，因此，第二终端设备作为数据发送端时，可以确定 每个终端设备对应的HARQ反馈资源，从而可以确定哪个终端设备反馈了ACK，哪个终端设备反馈了NACK，进一步地，第二终端设备可以对反馈了NACK的终端设备通过单播的方式重新发送数据，从而使第二终端设备不用通过组播消息重新发送数据，提升了资源利用率，避免了反馈了ACK的终端设备收到不必要的消息。
在一种可能的设计中，第一终端设备向第二终端设备发送上述多个索引中的每个索引关联的所述第一组播组中的终端设备的标识，包括：第一终端设备向第二终端设备发送单播消息，该单播消息中包括所述多个索引中的每个索引关联的第一组播组中的终端设备的标识；或者，第一终端设备发送组播消息，该组播消息中包括上述多个索引中的每个索引关联的第一组播组中的终端设备的标识；或者，第一终端设备发送广播消息，该广播消息中包括上述多个索引中的每个索引关联的第一组播组中的终端设备的标识。
在一种可能的设计中，第一终端设备获取上述多个索引之前，本申请实施例提供的资源配置方法还包括：第一终端设备确定第一组播组中存在终端设备离开第一组播组；或者，第一终端设备确定存在终端设备加入第一组播组。基于该方案，由于第一终端设备能够在组信息更新时重新获取多个索引，使HARQ反馈资源的配置能够适应组播组的动态变化，提高了资源配置的利用率和可靠性。
在一种可能的设计中，本申请实施例提供的资源配置方法还包括：第一终端设备向第二终端设备发送第二指示信息，该第二指示信息用于指示第二终端设备在特定时刻更新所述多个索引。基于该方案，由于第二指示信息指示第二终端设备在特定时刻更新多个索引，因此保证了第一组播组中除第一终端设备之外的其他终端设备在同一时刻进行更新，避免了因时延等问题造成的其他终端设备在不同时间接收到更新后的多个索引，从而出现某些终端设备使用更新前的索引，某些终端设备使用更新后的索引的问题，进而避免了可能出现的HARQ反馈资源冲突的问题。
在一种可能的设计中，本申请实施例提供的资源配置方法中的第一终端设备向第二终端设备发送第一指示信息和多个索引可以替换为，第一终端设备向第二终端设备发送与第二终端设备关联的第一索引。在该方案中，第二终端设备可以根据第一索引确定第二终端设备对应的HARQ反馈资源，避免了与其他数据接收端的反馈冲突。
第二方面，提供了一种资源配置方法及相应的通信装置。该方案中，第二终端设备接收来自第一终端设备的多个索引和第一指示信息，该多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，该多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自动重传请求HARQ反馈资源，该第一指示信息用于指示多个索引中与第二终端设备关联的第一索引，第一终端设备和第二终端设备均处于所述第一组播组；第二终端设备根据上述第一指示信息，确定第二终端设备对应的HARQ反馈资源，该第二终端设备对应的HARQ反馈资源与第一组播组中除第二终端设备之外的其他终端设备对应的HARQ反馈资源不同；或者，第二终端设备根据多个索引中除第一索引之外的其他索引，确定多个索引中除所述第一索引之外的其他每个索引分别对应的HARQ反馈资源，所述每个索引对应的HARQ反馈资源不同。其中，第二方面所带来的技术效果可参见上述第一方面所带来的技术效果，此处不再赘述。
在一种可能的设计中，第二终端设备接收来自第一终端设备的第一指示信息，包 括：第二终端设备接收来自第一终端设备的上述多个索引中的每个索引关联的所述第一组播组中的终端设备的标识。
在一种可能的设计中，第二终端设备确定多个索引中除第一索引之外的其他每个索引分别对应的HARQ反馈资源，包括：第二终端设备根据该多个索引中除该第一索引之外的其他索引，确定其他索引中的每个索引分别关联的终端设备对应的HARQ反馈资源。基于该方案，由于第一终端设备向第二终端设备发送每个索引关联的终端设备的终端标识，因此，第二终端设备作为数据发送端时，可以确定每个终端设备对应的HARQ反馈资源，从而可以确定哪个终端设备反馈了ACK，哪个终端设备反馈了NACK，进一步地，第二终端设备可以对反馈了NACK的终端设备通过单播的方式重新发送数据，从而使第二终端设备不用通过组播消息重新发送数据，提升了资源利用率，避免了反馈了ACK的终端设备收到不必要的消息。
在一种可能的设计中，本申请实施例提供的资源配置方法还包括：第二终端设备接收来自第一终端设备的第二指示信息，该第二指示信息用于指示第二终端设备在特定时刻更新所述多个索引。基于该方案，由于第二指示信息指示第二终端设备在特定时刻更新多个索引，因此保证了第一组播组中除第一终端设备之外的其他终端设备在同一时刻进行更新，避免了因时延等问题造成的其他终端设备在不同时间接收到更新后的多个索引，从而出现某些终端设备使用更新前的索引，某些终端设备使用更新后的索引的问题，进而避免了可能出现的HARQ反馈资源冲突的问题。
第三方面，提供了一种资源配置方法及相应的通信装置。该方案中，终端设备的第一协议层实体获取多个索引，该多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，该多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自动重传请求HARQ反馈资源，该每个索引指示的HARQ反馈资源不同，该终端设备为第一组播组中的任意一个终端设备；终端设备的第一协议层实体向该终端设备的第二协议层实体发送第一指示信息和该多个索引，该第一指示信息用于指示与该终端设备关联的第一索引。基于该方案，一方面，终端设备的第二协议层实体可以确定该终端设备对应的HARQ反馈资源，当该终端设备作为数据接收端时，可以在其对应的HARQ反馈资源上发送ACK/NACK，避免了与其他数据接收端的反馈冲突。另一方面，终端设备的第二协议层实体确定除与该终端设备相关联的索引之外的其他索引分别对应的HARQ反馈资源，当该终端设备为数据发送端时，可以在每个索引对应的HARQ反馈资源上接收反馈信息，也避免了数据接收端的反馈冲突。
在一种可能的设计中，终端设备的第一协议层实体获取多个索引，包括：终端设备的第一协议层实体获取所述多个索引、以及所述多个索引中的每个索引关联的所述第一组播组中的终端设备的终端标识。
在一种可能的设计中，终端设备的第一协议层实体向该终端设备的第二协议层实体发送所述第一指示信息，包括：终端设备的第一协议层实体向该终端设备的第二协议层实体发送所述多个索引中的每个索引关联的所述第一组播组中的终端设备的标识。基于该方案，由于终端设备的第一协议层实体向该终端设备的第二协议层实体发送每个索引关联的终端设备的终端标识，因此，该终端设备作为数据发送端时，可以确定每个终端设备对应的HARQ反馈资源，从而可以确定哪个终端设备反馈了ACK，哪 个终端设备反馈了NACK，进一步地，该终端设备可以对反馈了NACK的终端设备通过单播的方式重新发送数据，从而使该终端设备不用通过组播消息重新发送数据，提升了资源利用率，避免了反馈了ACK的终端设备收到不必要的消息。
在一种可能的设计中，终端设备的第一协议层实体获取多个索引之前，本申请实施例提供的资源配置方法还包括：终端设备的第一协议层实体确定所述第一组播组中存在终端设备离开第一组播组；或者，终端设备的第一协议层实体确定存在终端设备加入所述第一组播组。基于该方案，由于终端设备的第一协议层实体能够在组信息更新时重新获取多个索引，使HARQ反馈资源的配置能够适应组播组的动态变化，提高了资源配置的利用率和可靠性。
在一种可能的设计中，终端设备的第一协议层实体获取多个索引之前，本申请实施例提供的资源配置方法还包括：终端设备的第一协议层实体接收来自该终端设备的第二协议层实体的第二指示信息，该第二指示信息用于指示该第一组播组中存在终端设备离开该第一组播组；或者，该第二指示信息用于指示存在终端设备加入该第一组播组。基于该方案，由于该终端设备的第一协议层实体能够在组信息更新时重新获取多个索引，使HARQ反馈资源的配置能够适应组播组的动态变化，提高了资源配置的利用率和可靠性。
在一种可能的设计中，本申请实施例提供的资源配置方法还包括：终端设备的第一协议层实体向该终端设备的第二协议层实体发送第三指示信息，该第三指示信息用于指示所述终端设备的第二协议层实体在特定时刻更新所述多个索引。基于该方案，由于第三指示信息指示该终端设备在特定时刻更新多个索引，保证了第一组播组中的每个终端设备在同一时刻进行更新，避免了某些终端设备使用更新前的索引，某些终端设备使用更新后的索引的问题，进而避免了可能出现的HARQ反馈资源冲突的问题。
在一种可能的设计中，上述第一协议层实体包括应用层实体或者车联网层实体。
在一种可能的设计中，上述第二协议层包括接入层实体。
第四方面，提供了一种资源配置方法及相应的通信装置。该方案中，终端设备的第二协议层实体接收来自该终端设备的第一协议层实体的多个索引和第一指示信息，该多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，该多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自动重传请求HARQ反馈资源，该第一指示信息用于指示该多个索引中与该终端设备关联的第一索引，该终端设备为第一组播组中的任意一个终端设备；该终端设备的第二协议层实体根据该第一指示信息，确定该终端设备对应的HARQ反馈资源，该终端设备对应的HARQ反馈资源与该第一组播组中除该终端设备之外的其他终端设备对应的HARQ反馈资源不同；或者，该终端设备的第二协议层实体根据该多个索引中除该第一索引之外的其他索引，确定该多个索引中除该第一索引之外的其他每个索引分别对应的HARQ反馈资源，该每个索引对应的HARQ反馈资源不同。其中，第四方面所带来的技术效果可参见上述第三方面所带来的技术效果，此处不再赘述。
在一种可能的设计中，终端设备的第二协议层实体接收来自该终端设备的第一协议层实体的第一指示信息，包括：该终端设备的第二协议层实体接收来自该终端设备的第一协议层实体的上述多个索引中的每个索引关联的第一组播组中的终端设备的标 识。
在一种可能的设计中，终端设备的第二协议层实体确定多个索引中除第一索引之外的其他每个索引分别对应的HARQ反馈资源，包括：该终端设备的第二协议层实体根据多个索引中除所述第一索引之外的其他索引，确定所述其他索引中的每个索引分别关联的终端设备对应的HARQ反馈资源。基于该方案，该终端设备作为数据发送端时，可以确定每个终端设备对应的HARQ反馈资源，从而可以确定哪个终端设备反馈了ACK，哪个终端设备反馈了NACK，进一步地，该终端设备可以对反馈了NACK的终端设备通过单播的方式重新发送数据，从而使该终端设备不用通过组播消息重新发送数据，提升了资源利用率，避免了反馈了ACK的终端设备收到不必要的消息。
在一种可能的设计中，终端设备的第二协议层实体接收来自该终端设备的第一协议层实体的多个索引之前，本申请实施例提供的资源配置方法还包括：该终端设备的第二协议层实体向该终端设备的第一协议层实体发送第二指示信息，该第二指示信息用于指示第一组播组中存在终端设备离开所述第一组播组；或者，该第二指示信息用于指示存在终端设备加入第一组播组。基于该方案，由于该终端设备的第二协议层实体能够在组信息更新时将通知该终端设备的第一协议层实体，以便该终端设备的第一协议层实体重新获取多个索引，使HARQ反馈资源的配置能够适应组播组的动态变化，提高了资源配置的利用率和可靠性。
在一种可能的设计中，本申请实施例提供的资源配置方法还包括：该终端设备的第二协议层实体接收来自该终端设备的第一协议层实体的第三指示信息，该第三指示信息用于指示该终端设备的第二协议层实体在特定时刻更新上述多个索引。
在一种可能的设计中，上述第一协议层实体包括应用层实体或者车联网层实体。
在一种可能的设计中，上述第二协议层包括接入层实体。
第五方面，提供了一种通信装置用于实现上述各种方法。该通信装置可以为上述第一方面中的第一终端设备，比如车载通信装置，或者包含上述第一终端设备的装置，比如各种类型的车辆，或者上述第一终端设备中包含的装置，比如系统芯片；或者，该通信装置可以为上述第二方面中的第二终端设备，比如车载通信装置，或者包含上述第二终端设备的装置，比如各种类型的车辆，或者上述第二终端设备中包含的装置，比如系统芯片；或者，该通信装置可以为上述第三方面和第四方面中的终端设备，比如车载通信装置，或者包含上述终端设备的装置，比如各种类型的车辆，或者上述终端设备中包含的装置，比如系统芯片。所述通信装置包括实现上述方法相应的模块、单元、或手段(means)，该模块、单元、或means可以通过硬件实现，软件实现，或者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模块或单元。
第六方面，提供了一种通信装置，包括：处理器，还可以包括存储器；该存储器用于存储计算机指令，当该处理器执行该指令时，以使该通信装置执行上述任一方面所述的方法。该通信装置可以为上述第一方面中的第一终端设备，比如车载通信装置，或者包含上述第一终端设备的装置，比如各种类型的车辆，或者上述第一终端设备中包含的装置，比如系统芯片；或者，该通信装置可以为上述第二方面中的第二终端设备，比如车载通信装置，或者包含上述第二终端设备的装置，比如各种类型的车辆， 或者上述第二终端设备中包含的装置，比如系统芯片；或者，该通信装置可以为上述第三方面和第四方面中的终端设备，比如车载通信装置，或者包含上述终端设备的装置，比如各种类型的车辆，或者上述终端设备中包含的装置，比如系统芯片。
第七方面，提供了一种通信装置，包括：处理器；所述处理器用于与存储器耦合，并读取存储器中的指令之后，根据所述指令执行如上述任一方面所述的方法。该通信装置可以为上述第一方面中的第一终端设备，比如车载通信装置，或者包含上述第一终端设备的装置，比如各种类型的车辆，或者上述第一终端设备中包含的装置，比如系统芯片；或者，该通信装置可以为上述第二方面中的第二终端设备，比如车载通信装置，或者包含上述第二终端设备的装置，比如各种类型的车辆，或者上述第二终端设备中包含的装置，比如系统芯片；或者，该通信装置可以为上述第三方面和第四方面中的终端设备，比如车载通信装置，或者包含上述终端设备的装置，比如各种类型的车辆，或者上述终端设备中包含的装置，比如系统芯片。
第八方面，提供了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，当所述指令在通信装置上运行时，使得通信装置可以执行上述任一方面所述的方法。该通信装置可以为上述第一方面中的第一终端设备，比如车载通信装置，或者包含上述第一终端设备的装置，比如各种类型的车辆，或者上述第一终端设备中包含的装置，比如系统芯片；或者，该通信装置可以为上述第二方面中的第二终端设备，比如车载通信装置，或者包含上述第二终端设备的装置，比如各种类型的车辆，或者上述第二终端设备中包含的装置，比如系统芯片；或者，该通信装置可以为上述第三方面和第四方面中的终端设备，比如车载通信装置，或者包含上述终端设备的装置，比如各种类型的车辆，或者上述终端设备中包含的装置，比如系统芯片。
第九方面，提供了一种包含指令的计算机程序产品，当所述指令在通信装置上运行时，使得所述通信装置可以执行上述任一方面所述的方法。该通信装置可以为上述第一方面中的第一终端设备，比如车载通信装置，或者包含上述第一终端设备的装置，比如各种类型的车辆，或者上述第一终端设备中包含的装置，比如系统芯片；或者，该通信装置可以为上述第二方面中的第二终端设备，比如车载通信装置，或者包含上述第二终端设备的装置，比如各种类型的车辆，或者上述第二终端设备中包含的装置，比如系统芯片；或者，该通信装置可以为上述第三方面和第四方面中的终端设备，比如车载通信装置，或者包含上述终端设备的装置，比如各种类型的车辆，或者上述终端设备中包含的装置，比如系统芯片。
第十方面，提供了一种通信装置(例如，该通信装置可以是芯片或芯片系统)，该通信装置包括处理器，用于实现上述任一方面中所涉及的功能。在一种可能的设计中，该通信装置还包括存储器，该存储器，用于保存必要的程序指令和数据。该通信装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件。
其中，第五方面至第十方面中任一种设计方式所带来的技术效果可参见上述第一方面或第二方面或第三方面或第四方面中不同设计方式所带来的技术效果，此处不再赘述。
第十一方面，提供一种通信系统，该通信系统包括上述第一方面所述的第一终端设备和上述第二方面所述的第二终端设备。
附图说明
图1为本申请实施例提供的一种组播场景下的通信示意图；
图2为本申请实施例提供的一种终端设备的结构示意图；
图3为本申请实施例提供的一种通信系统的示意图；
图4为本申请实施例提供的另一种终端设备的结构示意图；
图5为本申请实施例提供的资源配置的方法流程图一；
图6为本申请实施例提供的资源配置的方法流程图二；
图7为本申请实施例提供的另一种通信系统的示意图；
图8为本申请实施例提供的资源配置的方法流程图三；
图9为本申请实施例提供的资源配置的方法流程图四；
图10为本申请实施例提供的索引与终端标识的关系示意图；
图11为本申请实施例提供的资源配置的方法流程图五；
图12为本申请实施例提供的资源配置的方法流程图六；
图13为本申请实施例提供的资源配置的方法流程图七；
图14为本申请实施例提供的资源配置的方法流程图八；
图15为本申请实施例提供的资源配置的方法流程图九；
图16为本申请实施例提供的一种第一终端设备的结构示意图；
图17为本申请实施例提供的一种第二终端设备的结构示意图；
图18为本申请实施例提供的又一种终端设备的结构示意图。
具体实施方式
为了方便理解本申请实施例的技术方案，首先给出本申请相关技术或名字的简要介绍如下。
第一，组播：
本申请实施例中，多个终端设备可以组成一个组播组。其中，以组播组地址为目的地址，发送报文的信源称为数据发送端，接收组播数据的组播用户称为数据接收端。比如，假设局域网(local area network，LAN)群组中的终端成员包括终端1、终端2、终端3、终端4、终端5和终端6。以终端1作为数据发送端，终端3、终端5和终端6作为数据接收端组成一个组播组为例，则对应的通信示意图可以如图1所示，即终端1发送的组播报文可以分别传输到组播组中的终端3、终端5和终端6。
第二，终端设备：
本申请实施例中的终端设备可以是车辆(vehicle)；也可以是安装在车辆上用于辅助车辆行驶的车载终端，或者车载终端内的芯片。其中，该车载终端可以是5G网络或者未来演进的PLMN中的用户设备(user equipment，UE)、接入终端、终端单元、终端站、移动站、移动台、远方站、远程终端、移动设备、无线通信设备、终端代理或终端装置等。接入终端可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备或可穿戴设备，虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial  control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。该车载终端可以是移动的，也可以是固定的。
在一种可能的设计中，终端设备的架构如图2所示。其中，包括接入层实体、V2X层实体、以及应用层(application，APP)实体。接入层实体、V2X层实体、以及APP层实体可以理解为是对终端设备从逻辑功能角度的划分，分别用于实现接入层、V2X层、以及APP层的功能。本申请中实体可以是物理实体，也可以是功能实体。例如，所述接入层实体、V2X层实体、以及APP层实体可以理解为设备或者设备中的物理实体，也可以是功能实体，本申请实施例对此不作具体限定。其中，接入层实体、V2X层实体、以及APP层实体在物理上可以是分离的，也可以部署在一起。接入层实体可以根据无线网络的协议层划分。例如，分组数据汇聚层协议(packet data convergence protocol，PDCP)协议层，无线链路控制(radio link control，RLC)协议层，媒体接入控制(media access control，MAC)协议层，物理(physical，PHY)协议层等的功能设置在接入层实体中。可以理解，对接入层实体处理功能按照这种协议层的划分仅仅是一种举例，也可以按照其他的方式进行划分。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。其中，在本申请的描述中，除非另有说明，“/”表示前后关联的对象是一种“或”的关系，例如，A/B可以表示A或B；本申请中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况，其中A,B可以是单数或者复数。并且，在本申请的描述中，除非另有说明，“多个”是指两个或多于两个。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。另外，为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
如图3所示，为本申请实施例提供的一种V2X通信系统10。该通信系统10可以为一个组播组，包括多个终端设备20。其中，终端设备20之间可以通过PC5接口相互通信(图3中仅以一个终端设备20与其他多个终端设备20通信为例)，PC5接口是终端设备之间的直连通信接口，用于终端设备之间直连的通信链路称为侧行链路或侧链(sidelink，SL)。当然，终端设备20之间还可以通过Uu接口通信，Uu接口通信指发送方终端设备20将V2X数据通过Uu接口发送至网络设备(图3中未示出)，网络设备将V2X数据发送至V2X应用服务器(图3中未示出)进行处理后，再由V2X应用服务器下发至网络设备，并通过网络设备发送给接收方终端设备。
以图3所示的终端设备20之间的交互为例，本申请实施例中，一种可能的实现方式中，第一终端设备获取多个索引，该多个索引中的任意一个索引分别关联第一组播 组中的一个终端设备，该多个索引中的每个索引分别用于指示对应的SL上的HARQ反馈资源，每个索引指示的HARQ反馈资源不同；第一终端设备向第二终端设备发送第一指示信息和上述多个索引，该第一指示信息指示上述多个索引中与第二终端设备关联的第一索引。第二终端设备接收来自第一终端设备的多个索引和第一指示信息后，根据第一指示信息确定第二终端设备对应的HARQ反馈资源；或者，根据上述多个索引中除第一索引之外的其他索引，确定其他每个索引对应的HARQ反馈资源，其中，每个索引对应的HARQ反馈资源不同。其中，该方案的具体实现将在后续方法实施例中详细描述，在此不予赘述。基于该方案，一方面，第二终端设备可以确定其对应的HARQ反馈资源，当第二终端设备作为数据接收端时，可以在其对应的HARQ反馈资源上发送ACK/NACK，避免了与其他数据接收端的反馈冲突。另一方面，第二终端设备可以确定除与该第二终端设备相关联的索引之外的其他索引分别对应的HARQ反馈资源，当第二终端设备为数据发送端时，可以在每个索引对应的HARQ反馈资源上接收反馈信息，也避免了数据接收端的反馈冲突。
或者，以图2所示的终端设备为例，本申请实施例中，一种可能的实现方式中，第二终端设备的第一协议层获取多个索引，该多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；该多个索引中的每个索引分别用于指示对应的SL上的HARQ反馈资源，每个索引指示的HARQ反馈资源不同；第二终端设备的第一协议层实体向第二终端设备的第二协议层实体发送第一指示信息和上述多个索引，该第一指示信息用于指示与第二终端设备关联的第一索引。第二终端设备的第二协议层实体接收到上述第一指示信息和多个索引后，可以根据第一指示信息确定第二终端设备对应的HARQ反馈资源；或者，第二终端设备的第二协议层实体可以根据上述多个索引之外的其他索引，确定其他每个索引分别对应的HARQ反馈资源。其中，每个索引对应的HARQ反馈资源不同，第二终端设备为第一组播组中的任意一个终端设备。其中，该方案的具体实现将在后续方法实施例中详细描述，在此不予赘述。基于该方案，一方面，第二终端设备可以确定其对应的HARQ反馈资源，当第二终端设备作为数据接收端时，可以在其对应的HARQ反馈资源上发送ACK/NACK，避免了与其他数据接收端的反馈冲突。另一方面，第二终端设备可以确定除与该第二终端设备相关联的索引之外的其他索引分别对应的HARQ反馈资源，当第二终端设备为数据发送端时，可以在每个索引对应的HARQ反馈资源上接收反馈信息，也避免了数据接收端的反馈冲突。
需要说明的是，本申请实施例中的索引可以是索引值，也可以是标识，或者，本申请实施例中的索引也可以是用于指示侧行链路SL上的混合自动重传请求HARQ反馈资源的信息在此统一说明，下述实施例不再赘述。
可选的，本申请实施例中的终端设备20也可以称之为通信装置，其可以是一个通用设备或者是一个专用设备，本申请实施例对此不作具体限定。
可选的，图3中的终端设备20可以通过图4中的通信设备(或通信装置)30来实现。图4所示为本申请实施例提供的通信设备30的结构示意图。该通信设备30包括一个或多个处理器301，通信总线302，以及至少一个通信接口(图4中仅是示例性的以包括通信接口304，以及一个处理器301为例进行说明)，可选的还可以包括存 储器303。
处理器301可以是一个通用中央处理器(central processing unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。
通信总线302可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。该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4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。该通信总线302用于连接通信设备30中的不同组件，使得不同组件可以通信。
通信接口304，可以是收发模块用于与其他设备或通信网络通信，如以太网，无线接入网(radio access network，RAN)，无线局域网(wireless local area networks，WLAN)等。例如，所述收发模块可以是收发器、收发机一类的装置。可选的，所述通信接口304也可以是位于处理器301内的收发电路，用以实现处理器的信号输入和信号输出。
存储器303可以是具有存储功能的装置。例如可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过通信线路302与处理器相连接。存储器也可以和处理器集成在一起。
其中，存储器303用于存储执行本申请方案的计算机执行指令，并由处理器301来控制执行。处理器301用于执行存储器303中存储的计算机执行指令，从而实现本申请实施例中提供的资源配置方法。
或者，可选的，本申请实施例中，也可以是处理器301执行本申请下述实施例提供的资源配置方法中的处理相关的功能，通信接口304负责与其他设备或通信网络通信，本申请实施例对此不作具体限定。
可选的，本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，处理器301可以包括一个或多个CPU，例如图4中的CPU0和CPU1。
在具体实现中，作为一种实施例，通信设备30可以包括多个处理器，例如图4中的处理器301和处理器308。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
在具体实现中，作为一种实施例，通信设备30还可以包括输出设备305和输入设备306。输出设备305和处理器301通信，可以以多种方式来显示信息。例如，输出 设备305可以是液晶显示器(liquid crystal display，LCD)，发光二级管(light emitting diode，LED)显示设备，阴极射线管(cathode ray tube，CRT)显示设备，或投影仪(projector)等。输入设备306和处理器301通信，可以以多种方式接收用户的输入。例如，输入设备306可以是鼠标、键盘、触摸屏设备或传感设备等。
目前，V2X组播通信的HARQ反馈机制中，多个数据接收端可能会在相同的HARQ反馈资源上反馈ACK和/或NACK，可能导致每个数据接收端的ACK和/或NACK反馈冲突。基于此，本申请实施例提供一种资源配置方法，该资源配置方法中，第一终端设备获取多个索引，该多个索引中的每个索引分别用于指示对应的侧行链路SL上的HARQ反馈资源，每个索引指示的HARQ反馈资源不同；第一终端设备向第二终端设备发送第一指示信息和该多个索引，该第一指示信息用于指示所述多个索引中与该第二终端设备关联的第一索引；或者，第二终端设备的第一协议层实体获取上述多个索引和第一指示信息，将该多个索引和第一指示信息发送给第二终端设备的第二协议层实体。第二终端设备根据第一指示信息确定该第二终端设备对应的HARQ反馈资源；或者，第二终端设备根据上述多个索引中除第一索引之外的其他索引，确定其他每个索引分别对应的HARQ反馈资源，每个索引对应的HARQ反馈资源不同。由于本申请实施例中，一方面，第二终端设备可以确定其对应的HARQ反馈资源，当第二终端设备作为数据接收端时，可以在其对应的HARQ反馈资源上发送ACK/NACK，避免了与其他数据接收端的反馈冲突。另一方面，第二终端设备确定除与该第二终端设备相关联的索引之外的其他索引分别对应的HARQ反馈资源，当第二终端设备为数据发送端时，可以在每个索引对应的HARQ反馈资源上接收反馈信息，也避免了数据接收端的反馈冲突。下面将结合图3所示的通信系统，通过具体实施例对本申请实施例提供的资源配置方法进行详细阐述。
需要说明的是，本申请下述实施例中各个设备之间的消息名字或消息中各参数的名字等只是一个示例，具体实现中也可以是其他的名字，本申请实施例对此不作具体限定。需要说明的是，由于组播组通信中一个终端设备可能处于多个组播组，因此，本申请下述实施例中各个设备之间的交互消息中、以及设备内部层间交互消息中可以显式或隐式地携带上述第一组播组的组标识，以指示各条消息用于为第一组播组中的终端设备配置索引，在此统一说明，下述实施例不再赘述。
一种可能的实现方式中，如图5所示，本申请实施例提供的资源配置方法包括如下步骤：
S501、第一终端设备获取第一组播组的组信息。
其中，第一组播组为第一终端设备所处的组播组中的一个组播组，第一终端设备可以是该第一组播组中的组头(Head UE)，该第一终端设备可以是第一组播组创建时通过预设规则确定的，本申请实施例对确定第一终端设备的方法不做具体限定。
可选的，本申请实施例中，第一组播组的组信息可以包括第一组播组的组标识(group identity，group ID)、以及第一组播组中所有终端设备的终端标识(user equipment identity，UE ID)；或者，第一组播组的组信息可以包括第一组播组的组标识、以及第一组播组中除该第一终端设备之外的其他终端设备的终端标识。其中，第一组播组的组标识可以是第一组播组的组目的层2标识(destination group L2 ID)； 终端设备的终端标识可以为该终端设备的层2标识，也可以为该终端设备的层1标识，本申请实施例对此不做具体限定。
可选的，本申请实施例中，第一终端设备获取第一组播组的组信息包括如下两种方法：
方法一：第一终端设备的上层实体(如APP层实体或者V2X层实体)获取第一组播组的组信息，并向第一终端设备的接入层实体发送该第一组播组的组信息。
可选的，本申请实施例中，第一终端设备的上层实体可以创建组播组，在该情况下，第一终端设备创建第一组播组时即可获知第一组播组的组信息。或者，第一终端设备之外的其他设备的上层实体创建第一组播组，并且确定第一终端设备为该第一组播组的组头，进而使第一终端设备的上层实体获知该第一组播组的组信息。
其中，第一终端设备的上层实体获取第一组播组的组信息后，向第一终端设备的接入层(access stratum，AS)实体发送该第一组播组的组信息。
方法二：第一终端设备的接入层实体获取第一组播组的组信息。
其中，本申请实施例中，其他终端设备可以向第一终端设备发送消息请求加入第一终端设备所处的第一组播组，该消息中的源地址为请求加入第一组播组的终端设备的终端标识，目的地址为第一组播组的组目的层2标识(destination group L2 ID)。第一终端设备的接入层实体收到该请求加入第一组播组的消息后可以通过单播或组播的方式向发送该消息的终端设备发送反馈消息，该反馈消息用于指示第一终端设备是否同意该终端设备加入第一组播组。由于每个请求加入第一组播组的终端设备都需要向第一终端设备发送包括终端标识的消息，因此，第一终端设备的接入层实体可以获取第一组播组中所有终端设备的终端标识，另外，第一终端设备可以在第一组播组创建时获取第一组播组的组标识，因此，第一终端设备的接入层实体可以获取第一组播组的组信息。
可选的，本申请实施例中，上述第一组播组的组目的层2标识可以是第一终端设备预先通过广播消息广播的。其中，第一终端设备可以在广播消息中显式包括第一组播组的组目的层2标识；或者，第一终端设备也可以在广播消息中包括加密后的组目的层2标识，在该情况下，可以防止收到显式包括组目的层2标识的广播消息的终端设备不向第一终端设备发送请求加入的消息就发起组播通信。
S502、第一终端设备根据第一组播组的组信息获取多个索引。
其中，本申请实施例中，该多个索引中的任意一个索引分别关联第一组播中的一个终端设备，该多个索引中的每个索引分别用于指示每个索引对应的SL上的HARQ反馈资源，每个索引指示的HARQ反馈资源不同，该多个索引的个数与第一组播组中的终端设备的个数相同。
可选的，本申请实施例中，第一组播组中的终端设备可以根据每个索引确定出该索引对应的HARQ反馈资源，该HARQ反馈资源用于该终端设备在侧行链路SL上发送或接收反馈信息。若该终端设备可以获取索引与终端设备的关联关系，则该终端设备可以进一步确定每个索引确定出的HARQ反馈资源的使用者是哪个终端设备。示例性的，该索引与终端设备的关联关系可以为索引1关联终端设备1，索引2关联终端设备2，则根据索引1确定的HARQ反馈资源用于终端设备1在SL上发送反馈信息， 根据索引2确定的HAQR反馈资源用于终端设备2在SL上发送反馈信息。
可选的，本申请实施例中，终端设备获取的索引与终端设备的关联关系可以是显式的索引与终端设备的终端标识的对应关系的列表，例如表1所示的对应关系表；或者，也可以是隐式的指示索引与终端设备的终端标识的对应关系的信息。示例性的，以第一组播组包括3个终端设备为例，如图10所示，终端设备可以通过字节1的前3个比特指示索引，例如，字节1的第一个比特为1时，表示索引为1，字节1的第2个比特为1时表示索引为2，字节1的第3个比特为1时表示索引为3。相应的，终端设备可以通过与字节1连续的其他字节表示每个索引关联的终端设备的终端标识，以终端标识的长度为24比特(3字节)为例，字节2至字节4可以包括索引1对应的终端设备1的终端标识1，字节5至字节7可以包括索引2对应的终端设备2的终端标识2，字节8至字节10可以包括索引3对应的终端设备3的终端标识3，以此类推。
需要说明的是，除特殊说明外，本申请实施例中的索引与终端设备的关联关系均可以是显式的关联关系列表，也可以是隐式的指示索引与终端设备的关联关系的信息，在此统一说明，下述实施例不再赘述。
表1
索引 索引关联的终端设备的终端标识
索引1 终端标识1
索引2 终端标识2
索引3 终端标识3
可选的，本申请实施例中，第一终端设备根据第一组播组的组信息获取多个索引包括：第一终端设备为第一组播组中的每个终端设备生成对应的索引，即第一终端设备使第一组播组中的每个终端设备关联不同的索引。第一终端设备可以通过终端设备的终端标识区分不同的终端设备，因此，实际上第一终端设备为第一组播组中的每个终端设备生成对应的索引可以理解为第一终端设备建立终端标识与索引的对应关系。示例性的，第一组播组中可以包括3个终端设备(其中存在一个终端设备为第一终端设备)，终端设备1，终端设备2，终端设备3，其分别对应的终端标识为终端标识1，终端标识2，终端标识3，第一终端设备可以为终端设备1生成索引1，为终端设备2生成索引2，为终端设备3生成索引3，即终端标识1对应索引1，终端标识2对应索引2，终端标识3对应索引3。
可选的，本申请实施例中，上述多个索引可以是第一终端设备的上层实体配置产生后发送给第一终端设备的接入层实体；或者，也可以是第一终端设备的接入层实体配置产生的，本申请实施例对此不做具体限定。
S503、第一终端设备向第二终端设备发送第一指示信息和上述多个索引。相应的，第二终端设备接收来自第一终端设备的第一指示信息和多个索引。
其中，第一指示信息用于指示上述多个索引中与第二终端设备关联的第一索引，第二终端设备为第一组播组中除第一终端设备之外的任意一个终端设备。
需要说明的是，本申请实施例中，对于第一终端设备来说，第一终端设备可以确定该多个索引和第一组播组中的终端设备的关联关系；对于第二终端设备来说，由于第一终端设备发送的是多个索引，第二终端设备并不能确定多个索引中的每个索引和 第一组播组中的终端设备的关联关系，因此，第一终端设备需要向第二终端设备发送第一指示信息，以使第二终端设备确定其关联的索引。示例性的，以多个索引包括{1,2,3}为例，对于第一终端设备来说，第一终端设备可以确定索引1关联终端设备1，索引2关联终端设备2，索引3关联终端设备3；但是对于第二终端设备来说，第二终端仅能确定多个索引包括{1,2,3}，并不能确定3个索引与第一组播组中的终端设备的关联关系。
可选的，本申请实施例中，第一指示信息可以显式地指示第二终端设备关联的第一索引，如第一指示信息中包括第一索引；或者，第一指示信息也可以隐式地指示与第二终端设备关联的第一索引，如第一指示信息可以为一个编号N，指示多个索引中第N个索引为与第二终端设备关联的第一索引，其中，N为正整数。
可选的，本申请实施例中，第一终端设备可以通过一条消息向第二终端设备发送第一指示信息和多个索引。此时，第一终端设备可以使用第二终端设备的终端标识和第二终端设备建立单播连接，通过单播消息向第二终端设备发送第一指示信息和多个索引。第二终端设备接收到该单播消息之后可以向第一终端设备发送反馈信息，用于指示第二终端设备是否成功接收到第一指示信息和多个索引。或者，可选的，本申请实施例中，第一终端设备可以将第一指示信息和多个索引通过两条消息分别向第二终端设备发送。此时，第一终端设备可以和第二终端设备建立单播连接，通过单播消息向第二终端设备发送第一指示信息，而通过组播或广播消息发送多个索引。第二终端设备接收到包括第一指示信息的单播消息之后可以向第一终端设备发送反馈信息，用于指示第二终端设备是否成功接收到第一指示信息。第一终端设备通过组播消息发送多个索引时，可以使用控制面的PC5组播无线资源控制(radio resource control，RRC)消息(group PC5-RRC)或者用户面组播消息。第一终端设备通过广播消息发送多个索引时，该广播消息中可以包括第一组播组的组标识，处于第一组播组中的第二终端设备检测到该广播消息中携带第一组播组的组标识时可以接收该广播消息，从而获取上述多个索引。
可选的，本申请实施例中，第一终端设备还可以向第二终端设备发送组头信息，该组头信息用于指示第一终端设备为第一组播组的组头，该组头信息可以是第一终端设备的终端标识，也可以是其他信息，本申请实施例对此不做具体限定。若第二终端设备接收到组头信息指示的组头(第一终端设备)发送的第一信息和/或多个索引，则第二终端设备根据接收到的第一指示信息和/或多个索引进行后续处理；若第二终端设备接收到第一组播组中除组头之外的其他终端设备发送的第一指示信息和/或多个索引，则第二终端设备可以丢弃接收到的第一指示信息和/或多个索引。由于第二终端设备只根据组头发送的第一指示信息和多个索引进行后续处理，因此，能够保证一个组播组中只有组头才能向该组播组中的其他终端设备配置索引，避免了组播组中存在多个终端设备配置索引的情况，从而避免索引配置冲突的问题。
可选的，本申请实施例中，第二终端设备接收到来自第一终端设备的第一指示信息和多个索引之后，若在一次组播通信中第二终端设备作为数据接收端(如图1所示的终端3)，则第二终端设备可以执行如下步骤S504a；或者，若在一次组播组通信中第二终端设备作为数据发送端(如图1所示的终端1)，则第二终端设备可以执行如 下步骤S504b。
其中，步骤S504a包括：
S504a、第二终端设备根据第一指示信息，确定第二终端设备对应的HARQ反馈资源。
其中，第二终端设备对应的HARQ反馈资源与第一组播组中除第二终端设备之外的其他终端设备对应的HARQ反馈资源不同。
可选的，本申请实施例中，第二终端设备作为一次组播通信的数据接收端时，可以根据第一指示信息确定其关联的第一索引，并通过该第一索引确定HARQ反馈资源，同时，由于第一指示信息指示该第一索引关联第二终端设备，因此，第二终端设备可以确定根据该第一索引确定出的HARQ反馈资源为第二终端设备对应的HARQ反馈资源。第二终端设备确定出其对应的HARQ反馈资源后，可以在该HARQ反馈资源上向该次组播通信的数据发送端发送ACK或NACK。由于第一组播组中每个终端设备关联的索引不同，因此，根据第二终端设备关联的第一索引确定的HARQ反馈资源与除第一索引之外的其他索引确定的HARQ反馈资源不同，避免了与其他数据接收端的反馈冲突。
可选的，本申请实施例中，第二终端设备可以通过预置规则根据第一索引确定第二终端设备对应的HARQ反馈资源。其中，该预置规则可以是索引和HARQ反馈资源的映射关系，则第二终端设备可以通过第一索引确定与第一索引存在映射关系的HARQ反馈资源；或者，该预置规则可以是自变量包括索引的计算公式，通过一个索引可以计算出该索引对应的HARQ反馈资源，则第二终端设备可以通过第一索引计算出对应的HARQ反馈资源。该预置规则可以是第一终端设备通过组播或单播消息发送给第二终端设备的，也可以是网络设备通过系统消息配置的，或者也可以是第二终端设备预配置的。需要说明的是，该预置规则可以与第一组播组的组标识相关联，用于区分不同组播组中确定HARQ反馈资源的规则。
其中，步骤S504b包括：
S504b、第二终端设备确定上述多个索引中除第一索引之外的每个索引对应的HARQ反馈资源。
其中，上述多个索引中每个索引对应的HARQ资源不同。
可选的，本申请实施例中，第二终端设备作为一次组播通信的数据发送端时，可以确定除第一索引之外的其他索引，并根据第一索引之外的其他索引中的每个索引确定该每个索引对应的HARQ反馈资源。其中，根据索引确定该索引对应的HARQ反馈资源的相关描述可参考步骤S504a中第二终端设备根据第一索引确定对应的HARQ反馈资源的描述，在此不再赘述。
需要说明的是，由于第二终端设备不能确定除第一索引之外的其他索引关联的第一组播组中的终端设备，因此，第二终端设备执行步骤S504b后，可以确定除第一索引之外其他每个索引对应的HARQ反馈资源，在确定出的HARQ反馈资源上接收本次组播通信的反馈信息，并且能够确定每个HARQ反馈资源上反馈的是ACK还是NACK，避免了数据接收端的反馈冲突。
本申请实施例提供的资源配置方法中，第一终端设备获取多个索引后，向第二终 端设备发送第一指示信息和该多个索引，该多个索引中的每个索引分别用于指示对应的侧行链路SL上的HARQ反馈资源，每个索引指示的HARQ反馈资源不同，该第一指示信息用于指示所述多个索引中与该第二终端设备关联的第一索引；第二终端设备接收到来自第一终端设备的上述第一指示信息和多个索引后，根据第一指示信息确定该第二终端设备对应的HARQ反馈资源；或者，第二终端设备根据上述多个索引中除第一索引之外的其他索引，确定其他每个索引分别对应的HARQ反馈资源，每个索引对应的HARQ反馈资源不同。由于本申请实施例中，一方面，第二终端设备可以确定其对应的HARQ反馈资源，当第二终端设备作为数据接收端时，可以在其对应的HARQ反馈资源上发送ACK/NACK，避免了与其他数据接收端的反馈冲突。另一方面，第二终端设备确定除与该第二终端设备相关联的索引之外的其他索引分别对应的HARQ反馈资源，当第二终端设备为数据发送端时，可以在每个索引对应的HARQ反馈资源上接收反馈信息，也避免了数据接收端的反馈冲突。
可选的，本申请实施例中，在一种可能的实现方式中，上述图5中的步骤S502可以包括步骤S5021-S5023；或者，上述图5中的步骤S502可以包括步骤S5024-S5025，其中，具体的实现方式如图6所示。
需要说明的是，图6所示的实现方式中，本申请提供的通信系统10中还包括网络设备30，如图7所示。其中，该网络设备30是一种将终端设备20接入到无线网络的设备，可以是长期演进(long term evolution，LTE)中的演进型基站(evolutional Node B，eNB或eNodeB)；或者第五代(5thgeneration，5G)网络或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的基站，宽带网络业务网关(broadband network gateway，BNG)，汇聚交换机或非第三代合作伙伴项目(3rd generation partnership project，3GPP)接入设备等，本申请实施例对此不作具体限定。可选的，本申请实施例中的基站可以包括各种形式的基站，例如：宏基站，微基站(也称为小站)，中继站，接入点等，本申请实施例对此不作具体限定。
其中，步骤S5021-S5023具体包括：
S5021、第一终端设备向网络设备发送第一组播组中终端设备的个数。
可选的，本申请实施例中，第一终端设备获取组信息时可以获取第一组播组中终端设备的个数，并将该终端设备的个数发送给网络设备。
S5022、第一终端设备接收来自网络设备的多个索引。
其中，多个索引的个数与第一组播组中终端设备的个数相同。
可选的，本申请实施例中，网络设备接收到第一组播组中终端设备的个数之后，可以为第一组播组生成相应个数的索引；或者，网络设备也可以从其存储的索引集合中选择相应个数的索引下发给第一终端设备，本申请实施例对此不做具体限定。
需要说明的是，步骤S5022中第一终端设备接收到多个索引时，并不能确定多个索引中的每个索引与第一组播组中的终端设备的关联关系，因此，第一终端设备需要进一步执行步骤S5023。
S5023、第一终端设备为第一组播组中的每个终端设备分配索引。
可选的，本申请实施例中，第一终端设备可以将从网络设备处接收的多个索引，分别分配给第一组播组中的每个终端设备。示例性的，第一终端设备接收到的多个索 引包括{4,5,6}，第一组播组中包括3个终端设备(其中存在一个终端设备为第一终端设备)，分别为终端设备1，终端设备2，终端设备3，其分别对应的终端标识为终端标识1，终端标识2，终端标识3，第一终端设备可以将索引4分配给终端设备1，将索引5分配给终端设备2，将索引6分配给终端设备3，即终端标识1对应索引4，终端标识2对应索引5，终端标识3对应索引6。
其中，步骤S5024-S5025具体包括：
S5024、第一终端设备向网络设备发送第一组播组中每个终端设备的终端标识。
可选的，本申请实施例中，第一终端设备获取组信息时可以获取第一组播组中每个终端设备的终端标识，并将该每个终端设备的终端标识发送给网络设备。
S5025、第一终端设备接收来自网络设备的多个索引。
其中，多个索引中的每个索引关联第一组播组中每个终端设备的终端标识。
可选的，本申请实施例中，网络设备接收到来自第一终端设备的第一组播组中每个终端设备的终端标识后，可以为每个终端标识分配对应的索引，并将每个终端标识对应的索引发送至第一终端设备。也就是说，在该情况下，第一组播组中每个终端设备的标识关联的索引是由网络设备分配的。其中，网络设备可以显式地向第一终端设备发送每个终端标识对应的索引。例如，网络设备向第一终端设备发送的消息中一个索引对应一个终端标识，如该消息的内容可以包括{索引1，终端标识1；索引2，终端标识2；索引3，终端标识3}；或者，网络设备也可以向第一终端设备发送如上述表1所示的映射关系。当然，网络设备也可以隐式地向第一终端设备发送每个终端标识对应的索引。优选的，网络设备可以将该索引按照接收到的终端标识的顺序发送给第一终端设备，第一终端设备接收到多个索引后，能够根据接收的索引的顺序确定每个索引关联的终端标识，即能够确定终端设备与索引的关联关系。示例性的，第一终端设备向网络设备发送的终端标识的顺序为{终端标识1，终端标识2，终端标识3}，网络设备向第一终端设备发送的多个索引的顺序为{4，5，6}，则第一终端设备可以确定终端标识1对应索引4，终端标识2对应索引5，终端标识3对应索引6；或者，网络设备也可以通过包括上述步骤S502中提供的隐式指示方法的消息，向第一终端设备发送每个终端标识对应的索引，相关描述可参考步骤S502，在此不再赘述。
可选的，本申请实施例中，在另一种可能的实现方式中，上述图5或图6所示的资源配置方法中的步骤S502之后，本申请实施例提供的资源配置方法还包括步骤S505a或步骤S505b，如图8所示，本申请实施例中仅以图5所示的资源配置方式后还包括步骤S505a或步骤S505b为例进行说明。
其中，若在一次组播通信中第一终端设备作为数据接收端(如图1所示的终端3)，则第一终端设备可以执行如下步骤S505a；或者，若在一次组播组通信中第一终端设备作为数据发送端(如图1所示的终端1)，则第一终端设备可以执行如下步骤S505b。
其中，步骤S505a包括：
S505a、第一终端设备根据与第一终端设备关联的第二索引，确定第一终端设备对应的HARQ反馈资源。
其中，第一终端设备对应的HARQ反馈资源与第一组播组中除第一终端设备之外的其他终端设备对应的HARQ反馈资源不同。
可选的，本申请实施例中，第一终端设备可以确定多个索引中每个索引和第一组播组中的终端设备的关联关系，则第一终端设备作为一次组播通信的数据接收端时，可以确定多个索引中与其关联的第二索引，并根据该第二索引确定第一终端设备对应的HARQ反馈资源，根据第二索引确定第一终端设备对应的HARQ反馈资源的相关描述可参考上述步骤S504a，在此不再赘述。第一终端设备确定出其对应的HARQ反馈资源后，可以在该HARQ反馈资源上向该次组播通信的数据发送端发送ACK或NACK。
由于第一组播组中每个终端设备关联的索引不同，因此，根据第一终端设备关联的第二索引确定的HARQ反馈资源与除第二索引之外的其他索引确定的HARQ反馈资源不同，避免了与其他数据接收端的反馈冲突。
其中，步骤S505b包括：
S505b、第一终端设备确定上述多个索引中除第二索引之外的每个索引关联的终端设备对应的HARQ反馈资源。
其中，每个索引关联的终端设备对应的HARQ反馈资源不同。
可选的，本申请实施例中，根据索引确定该索引对应的HARQ反馈资源的相关描述可参考步骤S504a中第二终端设备根据第一索引确定对应的HARQ反馈资源的描述，在此不再赘述。
由于第一终端设备可以确定多个索引中每个索引和第一组播组中的终端设备的关联关系，因此，第一终端设备作为一次组播通信的数据发送端时，一方面，可以确定除第二索引之外的每个索引对应的HARQ反馈资源，避免数据接收端的反馈冲突。另一方面，还能够确定每个索引对应的HARQ反馈资源为哪个终端设备所使用，即每个终端设备对应的HARQ反馈资源，从而可以确定哪个终端设备反馈了ACK，哪个终端设备反馈了NACK，进一步地，第一终端设备可以对反馈了NACK的终端设备通过单播的方式重新发送数据，从而使第一终端设备不用通过组播消息重新发送数据，提升了资源利用率，避免了反馈了ACK的终端设备收到不必要的消息。
需要说明的是，步骤S503与步骤S505a或步骤S505b没有必然的先后顺序，可以先执行步骤S503，再执行步骤S505a或S505b，也可以先执行步骤S505a或S505b，再执行步骤S503，也可以同时执行步骤S503和步骤S505a，或者同时执行步骤S503和步骤S505b，本申请实施例对此不做具体限定。
可选的，本申请实施例中，在又一种可能的实现方式中，上述图5或图6或图8所示的资源配置方法中的步骤S503可以替换为步骤S503′，相应的，上述图5或图6或图8所示的资源配置方法中的步骤S504b可以替换为步骤S504b′，如图9所示，本申请实施例中仅以图5所示的资源配置方式中的步骤S503替换为步骤S503′，相应的，仅以图5所示的资源配置方式中的步骤S504b替换为步骤S504b′为例进行说明。
其中，步骤S503′包括：
S503′、第一终端设备向第二终端设备发送多个索引中每个索引关联的终端设备的终端标识和多个索引。相应的，第二终端设备接收来自第一终端设备的多个索引中每个索引关联的终端设备的终端标识和多个索引。
可选的，本申请实施例中，第一终端设备可以通过一条消息向第二终端设备发送 多个索引和多个索引中每个索引关联的终端设备的终端标识。此时，第一终端设备可以在一条消息中包括多个索引以及第一组播组中所有终端设备的终端标识，其中，一个索引对应一个终端标识。例如，该一条消息的内容可以包括{索引1，终端标识1；索引2，终端标识2；索引3，终端标识3}。或者，第一终端设备可以在一条消息中包括索引和终端设备的终端标识的映射关系。例如，该一条消息的内容可以包括上述如表1所示的映射关系。或者，第一终端设备可以隐式地指示每个索引关联的终端设备的终端标识，具体实现可参考上述步骤S502中的相关描述，在此不再赘述。
或者，可选的，本申请实施例中，第一终端设备可以将多个索引和多个索引中每个索引关联的终端设备的终端标识通过两条消息分别向第二终端设备发送。此时，第一终端设备发送的多个索引的顺序可以和每个索引关联的终端设备的终端标识的顺序对应，例如，第一终端设备通过消息1发送索引的顺序为{1，2，3}，第一终端设备通过消息2发送终端标识的顺序为{终端标识1，终端标识2，终端标识3}；其中，消息1和消息2没有必然的先后顺序，可以先发送消息1再发送消息2，或者也可以先发送消息2再发送消息1，本申请实施例对此不做具体限定，则第二终端设备可以根据接收到的索引和终端标识，确定索引1对应终端标识1，索引2对应终端标识2，索引3对应终端标识3。或者，第一终端设备可以通过消息1发送多个索引，通过消息2发送如表1所示的索引与终端标识的映射关系。
可选的，本申请实施例中，第一终端设备无论通过一条消息发送多个索引和每个索引相关联的终端设备对应的终端标识，还是通过两条消息分别发送多个索引和每个索引相关联的终端设备对应的终端标识，第一终端设备均可以和第二终端设备建立单播连接发送上述内容；或者，也可以通过组播或广播消息发送上述内容，相关描述可参考上述步骤S503，在此不再赘述。
可选的，本申请实施例中，第一终端设备还可以向第二终端设备发送组头信息，该组头信息用于指示第一终端设备为第一组播组的组头，相关描述可参考上述步骤S503，在此不再赘述。
相应的，步骤S504b′包括：
S504b′、第二终端设备确定第一索引之外的每个索引关联的终端设备对应的HARQ反馈资源。
可选的，本申请实施例中，第一终端设备向第二终端发送多个索引和多个索引中每个索引关联的终端设备对应的终端标识时，第二终端设备可以确定每个索引关联的终端设备对应的终端标识，此时，第二终端设备可以确定第一索引之外的每个索引对应的HARQ反馈资源，并且可以进一步确定第一索引之外的每个索引关联的终端设备对应的HARQ反馈资源。
由于第二终端设备可以确定多个索引中每个索引和第一组播组中的终端设备的关联关系，因此，第二终端设备作为一次组播通信的数据发送端时，一方面，可以确定除第一索引之外的每个索引对应的HARQ反馈资源，避免数据接收端的反馈冲突。另一方面，还能够确定每个索引对应的HARQ反馈资源为哪个终端设备所使用，即每个终端设备对应的HARQ反馈资源，从而可以确定哪个终端设备反馈了ACK，哪个终端设备反馈了NACK，进一步地，第二终端设备可以对反馈了NACK的终端设备通过 单播方式重新发送数据，从而使第二终端设备不用通过组播消息重新发送数据，提升了资源利用率，避免了反馈了ACK的终端设备收到不必要的消息。
可选的，本申请实施例中，又一种可能的实现方式中，组播组中的终端设备可能是动态变化的，例如存在新的终端设备加入组播组或者存在终端设备离开组播组，在该场景下，本申请实施例提供的资源配置方法还包括：
第一终端设备确定第一组播组的组信息更新，其中，第一终端设备确定第一组播组的组信息更新可以包括：第一终端设备确定第一组播组中存在终端设备离开第一组播组；或者，第一终端设备确定存在终端设备新加入第一组播组。
其中，第一终端设备可以通过如下两种方法确定第一组播组的组信息更新：
方法一、第一终端设备的上层实体确定第一组播组的组信息更新。
可选的，本申请实施例中，第一终端设备的上层实体可以获取一个显式的指示信息，该指示信息指示第一组播组的组信息更新，同时，第一终端设备的上层实体可以获取更新后的第一组播组的组信息。
方法二、第一终端设备的接入层实体确定第一组播组的组信息更新。
其中，当存在终端设备申请加入第一组播组时，第一终端设备的接入层可以获取新加入的终端设备的终端标识，相关描述可参考上述步骤S501中的方法二。另外，当第一组播组中有终端设备离开时，该终端设备可以向第一终端设备发送消息通知其离开第一组播组，此时，第一终端设备的接入层实体可以向该终端设备发送反馈信息指示同意其离开第一组播组，并将该终端设备的终端标识从第一组播组的组信息中删除。
可选的，本申请实施例中，当第一终端设备确定第一组播组的组信息更新时，可以重新执行上述除步骤S501之外的其他步骤，即第一终端设备可以获取组信息更新后的多个索引，并向第二终端设备发送该更新后的多个索引，此时，上述除步骤S501之外的其他各个步骤中各个设备之间的交互消息可能关联一个更新指示信息，指示本次消息中的内容是第一组播组的组信息更新后的与第一组播组和/或第一组播组中的终端设备相关的内容。由于本申请中第一终端设备能够在组信息更新时重新获取多个索引，使HARQ反馈资源的配置能够适应组播组的动态变化，提高了资源配置的利用率和可靠性。
可选的，本申请实施例中，当第一终端设备确定第一组播组的组信息更新时，可以向第二终端设备发送第二指示信息，该第二指示信息中可以包括一个特定时刻，指示第二终端设备在特定时刻更新多个索引，即在特定时刻开始使用上述第一终端设备重新获取的多个索引。该第二指示信息可以和上述除步骤S501之外的其他各个步骤中的内容一起发送，也可以单独发送，本申请实施例对此不做具体限定。由于第二指示信息指示第二终端设备在特定时刻更新多个索引，保证了第一组播组中除第一终端设备之外的其他终端设备在同一时刻进行更新，避免了因时延等问题造成的其他终端设备在不同时间接收到更新后的多个索引，从而出现某些终端设备使用更新前的索引，某些终端设备使用更新后的索引的问题，进而避免了可能出现的HARQ反馈资源冲突的问题。
可选的，本申请实施例中，上述图5或图6或图8所示的资源配置方法中的步骤S503中，第一终端设备可以仅向第二终端设备发送与第二终端设备关联的第一索引， 第二终端设备可以根据该第一索引确定其对应的HARQ反馈资源。此时，仅考虑第一终端设备作为数据发送端，第一组播组中的其他终端设备作为数据接收端的情况。或者，可选的，本申请实施例中，上述图5或图6或图8所示的资源配置方法中的步骤S503中，第一终端设备也可以仅向第二终端设备发送多个索引，通过对该多个索引中的一个索引进行标记(如打标签)来指示第二终端设备关联的第一索引。
可选的，本申请实施例中，第一组播组中的终端设备获取到上述多个索引后，还可以根据每个索引确定该每个索引对应的其他接入层资源，如资源池(resource pool)、传输资源(如configured grant)等。其中，根据索引确定该索引对应的其他接入层资源的方法可以类似于根据索引确定HARQ反馈资源的方法，也可以采用其他方法，本申请实施例对此不做具体限定。由于终端设备可以根据索引确定其他接入层资源，因此，本申请提供的资源配置方法使用范围广，通用性强。
另一种可能的实现方式中，如图11所示，本申请实施例提供的资源配置方法包括如下步骤：
S1101、终端设备的第一协议层实体获取第一组播组的组信息。
其中，该终端设备为第一组播组中的任意一个终端设备，第一协议层实体包括应用层实体或V2X层实体。
可选的，本申请实施例中第一组播组的组信息的相关描述可参考上述步骤S501，在此不再赘述。
可选的，本申请实施例中，终端设备的第一协议层实体获取第一组播组的组信息包括如下两种方法：
方法一、终端设备的第一协议层实体直接获取第一组播组的组信息。
可选的，本申请实施例中，第一组播组创建后，该终端设备的第一协议层实体可以直接获取第一组播组的组信息。
方法二、终端设备的第一协议层实体接收来自该终端设备的第二协议层实体的组信息。
其中，终端设备的第二协议层实体包括接入层实体。终端设备的第二协议层实体获取第一组播组的组信息后，可以向该终端设备的第一协议层实体发送该组信息。其中，终端设备的第二协议层实体获取组信息的相关描述可参考上述步骤S501中的方法二，在此不再赘述。
S1102、终端设备的第一协议层实体获取多个索引。
其中，本申请实施例中，该多个索引中的任意一个索引分别关联第一组播中的一个终端设备，该多个索引中的每个索引分别用于指示每个索引对应的SL上的HARQ反馈资源，每个索引指示的HARQ反馈资源不同，该多个索引的个数与第一组播组中的终端设备的个数相同。
可选的，本申请实施例中，第一组播组中的终端设备的第二协议层实体可以根据每个索引确定出该索引对应的HARQ反馈资源，该HARQ反馈资源用于该终端设备在侧行链路SL上发送或接收反馈信息。若该终端设备的第二协议层实体可以获取索引与终端设备的关联关系，则该终端设备的第二协议层实体可以进一步确定每个索引确定出的HARQ反馈资源的使用者是哪个终端设备。
可选的，本申请实施例中，终端设备的第一协议层实体获取多个索引包括：终端设备的第一协议层实体获取多个索引、以及多个索引中的每个索引关联的第一组播组中的终端设备的终端标识。也就是说，终端设备的第一协议层实体可以获取多个索引与第一组播组中终端设备的关联关系。
S1103、终端设备的第一协议层实体向该终端设备的第二协议层实体发送第一指示信息和上述多个索引。相应的，该终端设备的第二协议层实体接收来自该终端设备的第一协议层实体的第一指示信息和多个索引。
其中，第一指示信息用于指示上述多个索引中与该终端设备关联的第一索引。
需要说明的是，本申请实施例中，对于终端设备的第一协议层实体来说，终端设备的第一协议层实体可以确定该多个索引和第一组播组中的终端设备的关联关系；对于终端设备的第二协议层实体来说，由于终端设备的第一协议层实体发送的是多个索引，终端设备的第二协议层实体并不能确定多个索引中的每个索引和第一组播组中的终端设备的关联关系，因此，终端设备的第一协议层实体需要向终端设备的第二协议层实体发送第一指示信息，以使终端设备的第二协议层实体确定其关联的索引。
可选的，本申请实施例中，终端设备的第二协议层实体接收到来自终端设备的第一协议层实体的第一指示信息和多个索引之后，若在一次组播通信中该终端设备作为数据接收端(如图1所示的终端3)，则该终端设备的第二协议层实体可以执行如下步骤S1104a；或者，若在一次组播组通信中该终端设备作为数据发送端(如图1所示的终端1)，则该终端设备的第二协议层实体可以执行如下步骤S1104b。
其中，步骤S1104a包括：
S1104a、终端设备的第二协议层实体根据第一指示信息，确定该终端设备对应的HARQ反馈资源。
其中，该终端设备对应的HARQ反馈资源与第一组播组中除该终端设备之外的其他终端设备对应的HARQ反馈资源不同。
可选的，本申请实施例中，终端设备的第二协议层实体根据第一指示信息，确定该终端设备对应的HARQ反馈资源的相关描述可参考上述步骤S504a，在此不再赘述。
其中，步骤S1104b包括：
S1104b、终端设备的第二协议层实体确定上述多个索引中除第一索引之外的每个索引对应的HARQ反馈资源。
其中，上述多个索引中每个索引对应的HARQ资源不同。
可选的，本申请实施例中，终端设备的第二协议层实体确定除第一索引之外的其他索引中每个索引对应的HARQ反馈资源的相关描述可参考上述步骤S504a，在此不再赘述。
本申请实施例提供的资源配置方法中，终端设备的第一协议层实体获取多个索引后，向该终端设备的第二协议层实体发送第一指示信息和该多个索引，该多个索引中的每个索引分别用于指示对应的侧行链路SL上的HARQ反馈资源，每个索引指示的HARQ反馈资源不同，该第一指示信息用于指示所述多个索引中与该终端设备关联的第一索引；终端设备的第二协议层实体接收到上述第一指示信息和多个索引后，根据第一指示信息确定该终端设备对应的HARQ反馈资源；或者，该终端设备的第二协议 层实体根据上述多个索引中除第一索引之外的其他索引，确定其他每个索引分别对应的HARQ反馈资源，每个索引对应的HARQ反馈资源不同。由于本申请实施例中，一方面，终端设备的第二协议层实体可以确定其对应的HARQ反馈资源，当该终端设备作为数据接收端时，可以在其对应的HARQ反馈资源上发送ACK/NACK，避免了与其他数据接收端的反馈冲突。另一方面，终端设备的第二协议层实体确定除与该终端设备相关联的索引之外的其他索引分别对应的HARQ反馈资源，当该终端设备为数据发送端时，可以在每个索引对应的HARQ反馈资源上接收反馈信息，也避免了数据接收端的反馈冲突。
可选的，本申请实施例中，在一种可能的实现方式中，上述图11所示的资源配置方法中的步骤S1103可以替换为步骤S1103′，相应的，上述图11所示的资源配置方法中的步骤S1104b可以替换为步骤S1104b′，其中，具体实现方式如图12所示。
其中，步骤1103′包括：
S1103′、终端设备的第一协议层实体向该终端设备的第二协议层实体发送多个索引中每个索引关联的终端设备的终端标识和多个索引。相应的，该终端设备的第二协议层接收来自该终端设备的多个索引中每个索引关联的终端设备的终端标识和多个索引。
可选的，本申请实施例中，终端设备的第一协议层实体可以通过一条消息向终端设备的第二协议层实体发送多个索引和多个索引中每个索引关联的终端设备的终端标识；或者，终端设备的第一协议层实体也可以通过两条消息分别向终端设备的第二协议层实体发送多个索引和多个索引中每个索引关联的终端设备的终端标识。本实施例中与步骤S503′不同的是终端设备的第一协议层实体不通过单播或组播或广播的方式向终端设备的第二协议层实体发送上述信息，其他相关描述可参考上述步骤S503′，在此不再赘述。
其中，步骤S1104b′包括：
S1104b′、终端设备的第二协议层实体确定第一索引之外的每个索引关联的终端设备对应的HARQ反馈资源。
其中，终端设备的第二协议层确定第一索引之外的每个索引关联的终端设备对应的HARQ反馈资源的相关描述可参考上述步骤S504b′，在此不再赘述。
由于终端设备的第二协议层实体可以确定多个索引中每个索引和第一组播组中的终端设备的关联关系，因此，该终端设备作为一次组播通信的数据发送端时，一方面，可以确定除第一索引之外的每个索引对应的HARQ反馈资源，避免数据接收端的反馈冲突。另一方面，还能够确定每个索引对应的HARQ反馈资源为哪个终端设备所使用，即每个终端设备对应的HARQ反馈资源，从而可以确定哪个终端设备反馈了ACK，哪个终端设备反馈了NACK，进一步地，终端设备的第二协议层实体可以对反馈了NACK的终端设备通过单播的方式重新发送数据，从而使该终端设备不用通过组播消息重新发送数据，提升了资源利用率，避免了反馈了ACK的终端设备收到不必要的消息。
可选的，本申请实施例中，又一种可能的实现方式中，组播组中的终端设备可能是动态变化的，例如存在新的终端设备加入组播组或者存在终端设备离开组播组，在 该场景下，本申请实施例提供的资源配置方法还包括：
终端设备的第一协议层实体确定第一组播组中存在终端设备离开第一组播组；或者，终端设备的第一协议层实体确定存在终端设备加入第一组播组。可选的，终端设备的第一协议层实体可以获取一个显式的指示信息，该指示信息指示第一组播组的组信息更新，同时，该终端设备的第一协议层实体可以获取更新后的第一组播组的组信息。
或者，可选的，在该场景下，本申请实施例提供的资源配置方法还包括：
终端设备的第二协议层实体确定第一组播组的组信息更新，其中，第一组播组的组信息更新包括：第一组播组在中存在终端设备离开第一组播组，或者存在终端设备加入第一组播组。其中，终端设备的第二协议层确定第一组播组的组信息更新的方法可参考上述实施例中的第一终端设备的接入层实体确定第一组播组的组信息更新的相关描述，在此不再赘述；终端设备的第二协议层实体确定组信息更新后，向该终端设备的第一协议层实体发送第二指示信息，该第二指示信息指示存在终端设备离开第一组播组；或者，该第二指示信息指示存在终端设备加入第一组播组。另外，终端设备的第二协议层实体还可以向该终端设备的第一协议层实体发送更新后的第一组播组的组信息。
可选的，本申请实施例中，当终端设备的第一协议层实体确定第一组播组的组信息更新时，可以重新执行上述除步骤S1101之外的其他步骤，即终端设备的第一协议层实体可以获取组信息更新后的多个索引，并向该终端设备的第二协议层实体发送该更新后的多个索引，此时，上述除步骤S1101之外的其他各个步骤中各个协议层之间的交互消息可能关联一个更新指示信息，指示本次消息中的内容是第一组播组的组信息更新后的与第一组播组和/或第一组播组中的终端设备相关的内容。由于本申请中终端设备的第一协议层实体能够在组信息更新时重新获取多个索引，使HARQ反馈资源的配置能够适应组播组的动态变化，提高了资源配置的利用率和可靠性。可选的，本申请实施例中，当终端设备的第一协议层实体确定第一组播组的组信息更新时，可以向终端设备的第二协议层发送第三指示信息，该第三指示信息中可以包括一个特定时刻，指示终端设备的第二协议层在特定时刻更新多个索引，即在特定时刻开始使用上述终端设备的第一协议层实体重新获取的多个索引。该第三指示信息可以和上述除步骤S1101之外的其他各个步骤中的内容一起发送，也可以单独发送，本申请实施例对此不做具体限定。由于第三指示信息指示终端设备的第二协议层在特定时刻更新多个索引，保证了第一组播组中的每个终端设备在同一时刻进行更新，避免了某些终端设备使用更新前的索引，某些终端设备使用更新后的索引的问题，进而避免了可能出现的HARQ反馈资源冲突的问题。
可选的，本申请实施例中，终端设备的第一协议层实体还可以向该终端设备的第二协议层实体发送组头信息，该组头信息用于指示第一组播组中的组头，该组头信息可以是组头的终端标识，也可以是其他信息，本申请实施例对此不做具体限定。由于终端设备的第一协议层实体可以向该终端设备的第二协议层实体发送组头信息，因此，可以使第一组播组中的终端设备都能确定该第一组播组的组头，以便后续处理。
可选的，本申请实施例中，终端设备的第二协议层实体获取到上述多个索引后， 还可以根据每个索引确定该每个索引对应的其他接入层资源，如资源池(resource pool)、传输资源(如configured grant)等。其中，根据索引确定该索引对应的其他接入层资源的方法可以类似于根据索引确定HARQ反馈资源的方法，也可以采用其他方法，本申请实施例对此不做具体限定。由于终端设备的第二协议层实体可以根据索引确定其他接入层资源，因此，本申请提供的资源配置方法使用范围广，通用性强。
另一种可能的实现方式中，如图13所示，本申请实施例提供的资源配置方法包括如下步骤：
S1301、第一终端设备获取第一组播组的组信息。
其中，第一组播组为第一终端设备所处的组播组中的一个组播组，第一终端设备可以是该第一组播组中的组头(Head UE)，该第一终端设备可以是第一组播组创建时通过预设规则确定的，本申请实施例对确定第一终端设备的方法不做具体限定。
可选的，本申请实施例中，第一组播组的组信息、以及第一终端设备获取第一组播组的组信息的相关描述可参考上述实施例中的步骤S501，在此不再赘述。
S1302、第一终端设备向第一网络设备发送第一组播组中每个终端设备的终端标识。相应的，第一网络设备接收来自第一终端设备的第一组播组中每个终端设备的终端标识。
可选的，本申请实施例中，第一终端设备获取组信息时可以获取第一组播组中每个终端设备的终端标识，并将该每个终端设备的终端标识发送给第一网络设备。第一网络设备接收到第一组播组中每个终端设备的终端标识后可以执行如下步骤S1303。
S1303、第一网络设备为第一组播组中的每个终端设备分配索引，得到多个索引。
其中，本申请实施例中，该多个索引中的任意一个索引分别关联第一组播中的一个终端设备，该多个索引中的每个索引分别用于指示每个索引对应的SL上的HARQ反馈资源，每个索引指示的HARQ反馈资源不同，该多个索引的个数与第一组播组中的终端设备的个数相同。
可选的，本申请实施例中，第一网络设备接收到第一组播组中每个终端设备的终端标识之后，可以为每个终端设备生成对应的索引，也可以从其存储的索引集合中为每个终端设备选择一个索引，本申请实施例对此不做具体限定。
S1304、第一网络设备向第二终端设备发送第一指示信息和上述多个索引。相应的，第二终端设备接收来自第一网络设备的第一指示信息和多个索引。
其中，第一指示信息用于指示上述多个索引中与第二终端设备关联的第一索引，第二终端设备为第一组播组中的任意一个终端设备，即第二终端设备可能和第一终端设备为同一个终端设备。
可选的，本申请实施例中，对于第一指示信息的相关描述可参考上述步骤S503，在此不再赘述。
可选的，本申请实施例中，第一网络设备可以通过RRC消息向第二终端设备发送第一指示信息和多个索引。其中，第一网络设备可以通过一条消息发送第一指示信息和多个索引，也可以通过两条消息分别发送第一指示信息和多个索引，相关描述可参考上述步骤S503中第一终端设备向第二终端设备发送第一指示信息和多个索引的方式，在此不再赘述。
可选的，本申请实施例中，第二终端设备接收到来自第一网络设备的第一指示信息和多个索引之后，若在一次组播通信中第二终端设备作为数据接收端(如图1所示的终端3)，则第二终端设备可以执行如下步骤S1305a；或者，若在一次组播组通信中第二终端设备作为数据发送端(如图1所示的终端1)，则第二终端设备可以执行如下步骤S1305b。
其中，步骤S1305a包括：
S1305a、第二终端设备根据第一指示信息，确定第二终端设备对应的HARQ反馈资源。
其中，第二终端设备对应的HARQ反馈资源与第一组播组中除第二终端设备之外的其他终端设备对应的HARQ反馈资源不同。
可选的，本申请实施例中，第二终端设备根据第一指示信息确定第二终端设备对应的HARQ反馈资源的相关描述可参考上述步骤S504a，在此不再赘述。
其中，步骤S1305b包括：
S1305b、第二终端设备确定上述多个索引中除第一索引之外的每个索引对应的HARQ反馈资源。
其中，上述多个索引中每个索引对应的HARQ资源不同。
可选的，本申请实施例中第二终端设备确定上述多个索引中除第一索引之外的每个索引对应的HARQ反馈资源的相关描述可参考上述步骤S504b，在此不再赘述。
本申请实施例提供的资源配置方法中，第一网络设备获取多个索引后，向第二终端设备发送第一指示信息和该多个索引，该多个索引中的每个索引分别用于指示对应的侧行链路SL上的HARQ反馈资源，每个索引指示的HARQ反馈资源不同，该第一指示信息用于指示所述多个索引中与该第二终端设备关联的第一索引；第二终端设备接收到来自第一网络设备的上述第一指示信息和多个索引后，根据第一指示信息确定该第二终端设备对应的HARQ反馈资源；或者，第二终端设备根据上述多个索引中除第一索引之外的其他索引，确定其他每个索引分别对应的HARQ反馈资源，每个索引对应的HARQ反馈资源不同。由于本申请实施例中，一方面，第二终端设备可以确定其对应的HARQ反馈资源，当第二终端设备作为数据接收端时，可以在其对应的HARQ反馈资源上发送ACK/NACK，避免了与其他数据接收端的反馈冲突。另一方面，第二终端设备确定除与该第二终端设备相关联的索引之外的其他索引分别对应的HARQ反馈资源，当第二终端设备为数据发送端时，可以在每个索引对应的HARQ反馈资源上接收反馈信息，也避免了数据接收端的反馈冲突。
可选的，本申请实施例中，在一种可能的实现方式中，上述图13所示的资源配置方法中的步骤S1304可以替换为步骤S1304′，相应的，上述图13所示的资源配置方法中的步骤S1305b可以替换为步骤S1305b′，具体的实现方式如图14所示。
其中，步骤S1304′包括：
S1304′、第一网络设备向第二终端设备发送多个索引中每个索引关联的终端设备的终端标识和多个索引。相应的，第二终端设备接收来自第一网络设备的多个索引中每个索引关联的终端设备的终端标识和多个索引。
可选的，本申请实施例中，第一网络设备可以通过RRC消息或系统广播消息向第 二终端设备发送多个索引和每个所以关联的终端设备的终端标识。其中，第一网络设备可以通过一条消息向第二终端设备发送多个索引和多个索引中每个索引关联的终端设备的终端标识；或者，第一网络设备可以将多个索引和多个索引中每个索引关联的终端设备的终端标识通过两条消息分别向第二终端设备发送。相关描述可参考上述步骤S503′，在此不再赘述。
相应的，步骤S1305b′包括：
S1305b′、第二终端设备确定第一索引之外的每个索引关联的终端设备对应的HARQ反馈资源。
其中，相关描述可参考上述步骤S504b′，在此不再赘述。
由于第二终端设备可以确定多个索引中每个索引和第一组播组中的终端设备的关联关系，因此，第二终端设备作为一次组播通信的数据发送端时，一方面，可以确定除第一索引之外的每个索引对应的HARQ反馈资源，避免数据接收端的反馈冲突。另一方面，还能够确定每个索引对应的HARQ反馈资源为哪个终端设备所使用，即每个终端设备对应的HARQ反馈资源，从而可以确定哪个终端设备反馈了ACK，哪个终端设备反馈了NACK，进一步地，第二终端设备可以对反馈了NACK的终端设备通过单播方式重新发送数据，从而使第二终端设备不用通过组播消息重新发送数据，提升了资源利用率，避免了反馈了ACK的终端设备收到不必要的消息。
可选的，本申请实施例中，又一种可能的实现方式中，组播组终端终端设备可能是动态变化的，例如存在新的终端设备加入组播组或者存在终端设备离开组播组，在该场景下，本申请实施例提供的资源配置方法还包括：
第一终端设备确定第一组播组的组信息更新，其中，第一终端设备确定第一组播组的组信息更新的实现可参考上述实施例中的相关描述，在此不再赘述。
可选的，本申请实施例中，当第一终端设备确定第一组播组的组信息更新时，可以重新执行上述除步骤S1301之外的其他步骤，即第一终端设备可以向第一网络设备发送更新后的组信息，第一网络设备可以获取组信息更新后的多个索引，并向第二终端设备发送该更新后的多个索引，此时，上述除步骤S1301之外的其他各个步骤中各个设备之间的交互消息可能关联一个更新指示信息，指示本次消息中的内容是第一组播组的组信息更新后的与第一组播组和/或第一组播组中的终端设备相关的内容。由于本申请中第一网络设备能够在组信息更新时重新获取多个索引，使HARQ反馈资源的配置能够适应组播组的动态变化，提高了资源配置的利用率和可靠性。
可选的，本申请实施例中，当第一网络设备更新多个索引时，可以向第二终端设备发送第二指示信息，该第二指示信息中可以包括一个特定时刻，指示第二终端设备在特定时刻更新多个索引，即在特定时刻开始使用上述第一网络设备重新获取的多个索引。该第二指示信息可以和上述除步骤S1301之外的其他各个步骤中的内容一起发送，也可以单独发送，本申请实施例对此不做具体限定。由于第二指示信息指示第二终端设备在特定时刻更新多个索引，保证了第一组播组中的终端设备在同一时刻进行更新，避免了因时延等问题造成的其他终端设备在不同时间接收到更新后的多个索引，从而出现某些终端设备使用更新前的索引，某些终端设备使用更新后的索引的问题，进而避免了可能出现的HARQ反馈资源冲突的问题。
可选的，本申请实施例中，第二终端设备获取到上述多个索引后，还可以根据每个索引确定该每个索引对应的其他接入层资源，如资源池(resource pool)、传输资源(如configured grant)等。其中，根据索引确定该索引对应的其他接入层资源的方法可以类似于根据索引确定HARQ反馈资源的方法，也可以采用其他方法，本申请实施例对此不做具体限定。由于终端设备可以根据索引确定其他接入层资源，因此，本申请提供的资源配置方法使用范围广，通用性强。
可选的，本申请实施例中，第一组播组中的终端设备可能处于不同网络设备的覆盖范围下，当存在不处于第一网络设备的覆盖范围下的第三终端设备时，上述图13或图14所示的资源配置方法还包括步骤S1306-S1308a；或者，上述图13或图14所示的资源配置方法还包括步骤S1306-S1308b，如图15所示，本申请实施例中仅以图13所示的资源配置方法为例进行说明。其中，该资源配置方法包括：
S1306、第一网络设备向第二网络设备发送多个索引中每个索引关联的终端设备的标识和多个索引。相应的，第二网络设备接收来自第一网络设备的每个索引关联的终端设备的标识和多个索引。
其中，本申请实施例中，第一组播组中的第三终端设备不处于第一网络设备的覆盖范围之内时，第一网络设备可以向处于第三终端设备所述的第二网络设备发送每个索引关联的终端设备的标识和多个索引。其中，第一网络设备向第二网络设备发送每个索引关联的终端设备的标识和多个索引时，可以发送第一组播组的组标识，以使第二网络设备确定该多个索引是为第一组播组中的终端设备配置的索引。
可选的，本申请实施例中，第一网络设备可以通过网络设备之间的接口向第二网络设备发送每个索引关联的终端设备的终端标识和多个索引。可选的，第一网络设备可以通过一条消息向第二网络设备发送上述信息，也可以通过两条消息分别向第二网络设备发送上述信息，相关描述可参考上述步骤S503′，在此不再赘述。
S1307、第二网络设备向第三终端设备发送第三指示信息和多个索引。相应的，第三终端设备接收来自第二网络设备的第三指示信息和多个索引。
其中，第三指示信息用于指示上述多个索引中与第三终端设备关联的第三索引。
可选的，本申请实施例中，对于第一指示信息的相关描述可参考上述步骤S503，在此不再赘述。
可选的，本申请实施例中，第二网络设备可以通过RRC消息或向第三终端设备发送第三指示信息和多个索引。其中，第二网络设备可以通过一条消息发送第三指示信息和多个索引，也可以通过两条消息分别发送第三指示信息和多个索引，相关描述可参考上述步骤S503中第一终端设备向第二终端设备发送第一指示信息和多个索引的方式，在此不再赘述。
可选的，本申请实施例中，第三终端设备接收到来自第二网络设备的第三指示信息和多个索引之后，若在一次组播通信中第三终端设备作为数据接收端(如图1所示的终端3)，则第二终端设备可以执行如下步骤S1308a；或者，若在一次组播组通信中第三终端设备作为数据发送端(如图1所示的终端1)，则第三终端设备可以执行如下步骤S1308b。
其中，步骤S1308a包括：
S1308a、第三终端设备根据第三指示信息，确定第三终端设备对应的HARQ反馈资源。
其中，第三终端设备对应的HARQ反馈资源与第一组播组中除第三终端设备之外的其他终端设备对应的HARQ反馈资源不同。
可选的，本申请实施例中，第三终端设备根据第三指示信息确定第三终端设备对应的HARQ反馈资源的相关描述可参考上述步骤S504a，在此不再赘述。
其中，步骤S1308b包括：
S1308b、第三终端设备确定上述多个索引中除第三索引之外的每个索引对应的HARQ反馈资源。
其中，上述多个索引中每个索引对应的HARQ资源不同。
可选的，本申请实施例中第三终端设备确定上述多个索引中除第三索引之外的每个索引对应的HARQ反馈资源的相关描述可参考上述步骤S504b，在此不再赘述。
本申请实施例提供的资源配置方法中，第二网络设备获取多个索引后，向第三终端设备发送第三指示信息和该多个索引，该多个索引中的每个索引分别用于指示对应的侧行链路SL上的HARQ反馈资源，每个索引指示的HARQ反馈资源不同，该第三指示信息用于指示所述多个索引中与该第三终端设备关联的第三索引；第三终端设备接收到来自第二网络设备的上述第三指示信息和多个索引后，根据第三指示信息确定该第三终端设备对应的HARQ反馈资源；或者，第三终端设备根据上述多个索引中除第三索引之外的其他索引，确定其他每个索引分别对应的HARQ反馈资源，每个索引对应的HARQ反馈资源不同。由于本申请实施例中，一方面，第三终端设备可以确定其对应的HARQ反馈资源，当第三终端设备作为数据接收端时，可以在其对应的HARQ反馈资源上发送ACK/NACK，避免了与其他数据接收端的反馈冲突。另一方面，第三终端设备确定除与该第三终端设备相关联的索引之外的其他索引分别对应的HARQ反馈资源，当第三终端设备为数据发送端时，可以在每个索引对应的HARQ反馈资源上接收反馈信息，也避免了数据接收端的反馈冲突。
需要说明的是，上述图15所示的资源配置方法中，步骤S1304与步骤S1306没有必然的先后顺序，可以先执行步骤S1304，再执行步骤S1306，也可以先执行步骤S1306，再执行步骤S1304，也可以同时执行步骤S1304和步骤S1306，本申请实施例对此不做具体限定。
可选的，本申请实施例中，上述图15所示的资源配置方法中，步骤S1307中第二网络设备向第三终端设备发送第三指示信息可以包括：第二网络设备向第三终端设备发送每个索引关联的终端设备对应的HARQ反馈资源。相应的，上述步骤S1308b可以包括：第三终端设备确定除第三索引外的每个索引关联的终端设备对应的HARQ反馈资源。相关描述可参考上述步骤S1304′和步骤S1305b′，在此不再赘述。
由于第三终端设备可以确定多个索引中每个索引和第一组播组中的终端设备的关联关系，因此，第三终端设备作为一次组播通信的数据发送端时，一方面，可以确定除第三索引之外的每个索引对应的HARQ反馈资源，避免数据接收端的反馈冲突。另一方面，还能够确定每个索引对应的HARQ反馈资源为哪个终端设备所使用，即每个终端设备对应的HARQ反馈资源，从而可以确定哪个终端设备反馈了ACK，哪个终 端设备反馈了NACK，进一步地，第三终端设备可以对反馈了NACK的终端设备通过单播方式重新发送数据，从而使第三终端设备不用通过组播消息重新发送数据，提升了资源利用率，避免了反馈了ACK的终端设备收到不必要的消息。
可选的，本申请实施例中，当第一网络设备更新多个索引时，可以向第二网络设备发送第四指示信息以及更新后的索引，该第四指示信息中可以包括一个特定时刻，指示第二网络设备覆盖范围下的第一组播组中的终端设备在特定时刻更新多个索引，即在特定时刻开始使用上述第一网络设备重新获取的多个索引。由于第四指示信息指示第二网络设备覆盖范围下的第一组播组中的终端设备在特定时刻更新多个索引，保证了第一组播组中的终端设备在同一时刻进行更新，避免了因时延等问题造成的其他终端设备在不同时间接收到更新后的多个索引，从而出现某些终端设备使用更新前的索引，某些终端设备使用更新后的索引的问题，进而避免了可能出现的HARQ反馈资源冲突的问题。
可选的，本申请实施例中，第三终端设备获取到上述多个索引后，还可以根据每个索引确定该每个索引对应的其他接入层资源，如资源池(resource pool)、传输资源(如configured grant)等。其中，根据索引确定该索引对应的其他接入层资源的方法可以类似于根据索引确定HARQ反馈资源的方法，也可以采用其他方法，本申请实施例对此不做具体限定。由于终端设备可以根据索引确定其他接入层资源，因此，本申请提供的资源配置方法使用范围广，通用性强。
可以理解的是，以上各个实施例中，由终端设备实现的方法和/或步骤，也可以由可用于终端设备的部件(例如芯片或者电路)实现。
上述主要从各个网元之间交互的角度对本申请实施例提供的方案进行了介绍。相应的，本申请实施例还提供了通信装置，该通信装置用于实现上述各种方法。该通信装置可以为上述方法实施例中的第一终端设备，比如车载通信装置，或者包含上述第一终端设备的装置，比如各种类型的车辆，或者上述第一终端设备中包含的装置，比如系统芯片；或者，该通信装置可以为上述方法实施例中的第二终端设备，比如车载通信装置，或者包含上述第二终端设备的装置，比如各种类型的车辆，或者上述第二终端设备中包含的装置，比如系统芯片；或者，该通信装置可以为上述方法实施例中的终端设备，比如车载通信装置，或者包含上述终端设备的装置，比如各种类型的车辆，或者上述终端设备中包含的装置，比如系统芯片。可以理解的是，该通信装置为了实现上述功能，其包含了实现上述方法相应的模块、单元、或手段(means)，该模块、单元、或means可以通过硬件实现，软件实现，或者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模块或单元。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法实施例中对通信装置进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻 辑功能划分，实际实现时可以有另外的划分方式。
比如，以通信装置为上述方法实施例中的第一终端设备为例。图16示出了一种第一终端设备160的结构示意图。该第一终端设备160包括处理模块1601和收发模块1602。所述收发模块1602，也可以称为收发单元用以实现发送和/或接收功能，例如可以是收发电路，收发机，收发器或者通信接口。
其中，处理模块1601，用于获取多个索引，该多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，该多个索引中的每个索引分别用于指示对应的SL上的HARQ反馈资源，该每个索引指示的HARQ反馈资源不同；处理模块1601，还用于通过收发模块1602向第二终端设备发送第一指示信息和该多个索引，该第一指示信息用于指示该多个索引中与该第二终端设备关联的第一索引，第二终端设备为第一组播组中除该第一终端设备之外的任意一个终端设备。
可选的，处理模块1601，用于获取多个索引，包括：处理模块1601，用于分别为第一组播组中的每个终端设备生成对应的索引，得到多个索引。
可选的，处理模块1601，用于获取多个索引，包括：处理模块1601，用于通过收发模块1602向网络设备发送第一组播组中终端设备的个数；处理模块1601，还用于通过收发模块1602接收来自网络设备的上述多个索引，其中，该多个索引的个数与第一组播组中终端设备的个数相同。处理模块1601，还用于将该多个索引中的每个索引分配给第一组播组中的每个终端设备。
可选的，处理模块1601，用于获取多个索引，该多个索引中的任意一个索引分别关联第一组播组中的一个终端设备，包括：处理模块1601，用于通过收发模块1602向网络设备发送第一组播组中每个终端设备的终端标识；处理模块1601，还用于通过收发模块1602接收来自网络设备的上述多个索引，该多个索引中的每个索引关联第一组播组中的每个终端设备的终端标识。
可选的，处理模块1601，还用于根据与该第一终端设备关联的第二索引，确定第一终端设备对应的HAQR反馈资源；或者，处理模块1601，还用于根据该多个索引中除该第二索引之外的其他索引，确定该多个索引中除该第二索引之外的其他每个索引分别关联的终端设备对应的HARQ反馈资源。
可选的，处理模块1601，用于通过收发模块1602向第二终端设备发送第一指示信息，包括：处理模块1601，用于通过收发模块1602向第二终端设备发送单播消息，该单播消息中包括所述第一指示信息。
可选的，处理模块1601，用于通过收发模块1602向第二终端设备发送第一指示信息，包括：处理模块1601，用于通过收发模块1602向第二终端设备发送上述多个索引中的每个索引关联的第一组播组中的终端设备的标识。
可选的，处理模块1601，用于通过收发模块1602向第二终端设备发送上述多个索引中的每个索引关联的第一组播组中的终端设备的标识，包括：处理模块1601，用于通过收发模块1602向第二终端设备发送单播消息，该单播消息中包括该多个索引中的每个索引关联的该第一组播组中的终端设备的标识；或者，处理模块1601，用于通过收发模块1602发送组播消息，该组播消息中包括该多个索引中的每个索引关联的该第一组播组中的终端设备的标识；或者，处理模块1601，用于通过收发模块1602发 送广播消息，该广播消息中包括该多个索引中的每个索引关联的该第一组播组中的终端设备的标识。
可选的，处理模块1601，还用于确定第一组播组中存在终端设备离开第一组播组；或者，处理模块1601，还用于确定存在终端设备加入第一组播组。
可选的，处理模块1601，还用于通过收发模块1602向第二终端设备发送第二指示信息，该第二指示信息用于指示该第二终端设备在特定时刻更新该多个索引。
本申请实施例中，处理模块1601用于通过收发模块1602接收上述信息或消息可以理解为，收发模块1602接收外界发送的携带上述信息或消息的信号之后，经过或者不经过信号处理发送给处理模块1601处理。或者，本申请实施例中，处理模块1601用于通过收发模块1602接收上述信息或消息可以理解为，收发模块1602接收外界发送的携带上述信息或消息的信号之后，经过或者不经过信号处理发送给处理模块1601处理。在此统一说明，以下不再赘述。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该第一终端设备160以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该第一终端设备160可以采用图4所示的通信装置30的形式。
比如，图4所示的通信装置30中的处理器301可以通过调用存储器303中存储的计算机执行指令，使得通信装置30执行上述方法实施例中的资源配置方法。
示例性的，图16中的处理模块1601和收发模块1602的功能/实现过程可以通过图4所示的通信装置30中的处理器301调用存储器303中存储的计算机执行指令来实现。或者，图16中的处理模块1601的功能/实现过程可以通过图4所示的通信装置30中的处理器301调用存储器303中存储的计算机执行指令来实现，图16中的收发模块1602的功能/实现过程可以通过图4所示的通信装置30中的通信接口304来实现。
由于本实施例提供的第一终端设备160可执行上述的资源配置方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
或者，比如，以通信装置为上述方法实施例中的第二终端设备为例。图17示出了一种第二终端设备170的结构示意图。该第二终端设备170包括处理模块1701和收发模块1702。所述收发模块1702，也可以称为收发单元用以实现发送和/或接收功能，例如可以是收发电路，收发机，收发器或者通信接口。
其中，处理模块1701，用于通过收发模块1702接收来自第一终端设备的多个索引和第一指示信息，该多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，该多个索引中的每个索引分别用于指示对应的SL上的HARQ反馈资源，该第一指示信息用于指示该多个索引中与第二终端设备关联的第一索引，该第一终端设备和该第二终端设备均处于该第一组播组；处理模块1701，还用于根据该第一指示信息，确定该第二终端设备对应的HARQ反馈资源，该第二终端设备对应的HARQ反馈资源与该第一组播组中除该第二终端设备之外的其他终端设备对应的HARQ反馈资 源不同；或者，处理模块1701，还用于根据该多个索引中除该第一索引之外的其他索引，确定该多个索引中除该第一索引之外的其他每个索引分别对应的HARQ反馈资源，该每个索引对应的HARQ反馈资源不同。
可选的，处理模块1701，用于通过收发模块1702接收来自第一终端设备的第一指示信息，包括：处理模块1701，用于通过收发模块1702接收来自第一终端设备的多个索引中的每个索引关联的第一组播组中的终端设备的标识。
可选的，处理模块1701，用于确定该多个索引中除该第一索引之外的其他每个索引分别对应的HARQ反馈资源，包括：处理模块1701，用于根据该多个索引中除该第一索引之外的其他索引，确定该其他索引中的每个索引分别关联的终端设备对应的HARQ反馈资源。
可选的，处理模块1701，还用于通过收发模块1702接收来自第一终端设备的第二指示信息，该第二指示信息用于指示第二终端设备在特定时刻更新上述多个索引。
本申请实施例中，处理模块1701用于通过收发模块1702接收上述信息或消息可以理解为，收发模块1702接收外界发送的携带上述信息或消息的信号之后，经过或者不经过信号处理发送给处理模块1701处理。或者，本申请实施例中，处理模块1701用于通过收发模块1702接收上述信息或消息可以理解为，收发模块1702接收外界发送的携带上述信息或消息的信号之后，经过或者不经过信号处理发送给处理模块1701处理。在此统一说明，以下不再赘述。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该第二终端设备170以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该第二终端设备170可以采用图4所示的通信装置30的形式。
示例性的，图17中的处理模块1701和收发模块1702的功能/实现过程可以通过图4所示的通信装置30中的处理器301调用存储器303中存储的计算机执行指令来实现。或者，图17中的处理模块1701的功能/实现过程可以通过图4所示的通信装置30中的处理器301调用存储器303中存储的计算机执行指令来实现，图17中的收发模块1702的功能/实现过程可以通过图4所示的通信装置30中的通信接口304来实现。
由于本实施例提供的第二终端设备170可执行上述的资源配置方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
或者，比如，以通信装置为上述方法实施例中的终端设备为例。图18示出了一种终端设备180的结构示意图。该终端设备180包括处理模块1801和收发模块1802。所述收发模块1802，也可以称为收发单元用以实现发送和/或接收功能，例如可以是收发电路，收发机，收发器或者通信接口。
其中，在一种可能的实现方式中，处理模块1801，用于该终端设备的第一协议层实体获取多个索引，该多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，该多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自 动重传请求HARQ反馈资源，该每个索引指示的HARQ反馈资源不同，该终端设备为该第一组播组中的任意一个终端设备；处理模块1801，还用于该终端设备的第一协议层实体通过收发模块1802向该终端设备的第二协议层实体发送第一指示信息和该多个索引，该第一指示信息用于指示与该终端设备关联的第一索引。
可选的，处理模块1801，用于该终端设备的第一协议层实体获取多个索引，包括：处理模块1801，用于该终端设备的第一协议层实体获取该多个索引、以及该多个索引中的每个索引关联的该第一组播组中的终端设备的终端标识。
可选的，处理模块1801，用于该终端设备的第一协议层实体通过收发模块1802向该终端设备的第二协议层实体发送第一指示信息，包括：处理模块1801，用于该终端设备的第一协议层实体通过收发模块1802向该终端设备的第二协议层实体发送该多个索引中的每个索引关联的该第一组播组中的终端设备的标识。
可选的，处理模块1801，还用于该终端设备的第一协议层实体确定该第一组播组中存在终端设备离开该第一组播组；或者，处理模块1801，还用于该终端设备的第一协议层实体确定存在终端设备加入该第一组播组。
可选的，处理模块1801，还用于该终端设备的第一协议层实体通过收发模块1802接收来自该终端设备的第二协议层实体的第二指示信息，该第二指示信息用于指示该第一组播组中存在终端设备离开该第一组播组；或者，该第二指示信息用于指示存在终端设备加入该第一组播组。
可选的，处理模块1801，还用于该终端设备的第一协议层实体通过收发模块1802向该终端设备的第二协议层实体发送第三指示信息，该第三指示信息用于指示该终端设备的第二协议层实体在特定时刻更新该多个索引。
其中，在一种可能的实现方式中，处理模块1801，用于该终端设备的第二协议层实体通过收发模块1802接收来自该终端设备的第一协议层实体的多个索引和第一指示信息，该多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，该多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自动重传请求HARQ反馈资源，该第一指示信息用于指示该多个索引中与该终端设备关联的第一索引，该终端设备为该第一组播组中的任意一个终端设备；处理模块1801，还用于该终端设备的第二协议层实体根据该第一指示信息，确定该终端设备对应的HARQ反馈资源，该终端设备对应的HARQ反馈资源与该第一组播组中除该终端设备之外的其他终端设备对应的HARQ反馈资源不同；或者，处理模块1801，还用于该终端设备的第二协议层实体根据该多个索引中除该第一索引之外的其他索引，确定该多个索引中除该第一索引之外的其他每个索引分别对应的HARQ反馈资源，该每个索引对应的HARQ反馈资源不同。
可选的，处理模块1801，用于该终端设备的第二协议层实体通过收发模块1802接收来自该终端设备的第一协议层实体的第一指示信息，包括：处理模块1801，用于该终端设备的第二协议层实体通过收发模块1802接收来自该终端设备的第一协议层实体的上述多个索引中的每个索引关联的所述第一组播组中的终端设备的标识。
可选的，处理模块1801，用于该终端设备的第二协议层实体确定该多个索引中除该第一索引之外的其他每个索引分别对应的HARQ反馈资源，包括：处理模块1801， 用于该终端设备的第二协议层实体根据该多个索引中除该第一索引之外的其他索引，确定该其他索引中的每个索引分别关联的终端设备对应的HARQ反馈资源。
可选的，处理模块1801，还用于该终端设备的第二协议层实体通过收发模块1802向该终端设备的第一协议层实体发送第二指示信息，该第二指示信息用于指示该第一组播组中存在终端设备离开该第一组播组；或者，该第二指示信息用于指示存在终端设备加入该第一组播组。
可选的，处理模块1801，还用于该终端设备的第二协议层实体通过收发模块1802接收来自该终端设备的第一协议层实体的第三指示信息，该第三指示信息用于指示该终端设备的第二协议层实体在特定时刻更新该多个索引。
本申请实施例中，处理模块1801用于通过收发模块1802接收上述信息或消息可以理解为，收发模块1802接收外界发送的携带上述信息或消息的信号之后，经过或者不经过信号处理发送给处理模块1801处理。或者，本申请实施例中，处理模块1801用于通过收发模块1802接收上述信息或消息可以理解为，收发模块1802接收外界发送的携带上述信息或消息的信号之后，经过或者不经过信号处理发送给处理模块1801处理。在此统一说明，以下不再赘述。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该终端设备180以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该终端设备180可以采用图4所示的通信装置30的形式。
示例性的，图18中的处理模块1801和收发模块1802的功能/实现过程可以通过图4所示的通信装置30中的处理器301调用存储器303中存储的计算机执行指令来实现。或者，图18中的处理模块1801的功能/实现过程可以通过图4所示的通信装置30中的处理器301调用存储器303中存储的计算机执行指令来实现，图18中的收发模块1802的功能/实现过程可以通过图4所示的通信装置30中的通信接口304来实现。
由于本实施例提供的终端设备180可执行上述的资源配置方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
可选的，本申请实施例还提供了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，当所述指令在上述通信装置上运行时，使得通信装置可以执行上述任一方面所述的方法。
或者，可选的，本申请实施例还提供了一种包含指令的计算机程序产品，当所述指令在上述通信装置上运行时，使得所述通信装置可以执行上述任一方面所述的方法。
或者，可选的，本申请实施例还提供了一种通信装置(例如，该通信装置可以是芯片或芯片系统)，该通信装置包括处理器，用于实现上述任一方法实施例中的方法。在一种可能的设计中，该通信装置还包括存储器。该存储器，用于保存必要的程序指令和数据，处理器可以调用存储器中存储的程序代码以指令该通信装置执行上述任一方法实施例中的方法。当然，存储器也可以不在该通信装置中。该通信装置是芯片系 统时，可以由芯片构成，也可以包含芯片和其他分立器件，本申请实施例对此不作具体限定。
上述实施例中，可以理解的是，通信装置中不一定必要包括存储器，通信装置可以通过调用外部存储器中的指令来执行相应的功能；或者，相应的程序指令，可以在后期装载到通信装置中的存储器中，以供处理器调用后执行相应的操作。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。本申请实施例中,计算机可以包括前面所述的装置。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (38)

  1. 一种资源配置方法，其特征在于，所述方法包括：
    第一终端设备获取多个索引，所述多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，所述多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自动重传请求HARQ反馈资源，所述每个索引指示的HARQ反馈资源不同；
    所述第一终端设备向第二终端设备发送第一指示信息和所述多个索引，所述第一指示信息用于指示所述多个索引中与所述第二终端设备关联的第一索引，所述第二终端设备为所述第一组播组中除所述第一终端设备之外的任意一个终端设备。
  2. 根据权利要求1所述的方法，其特征在于，所述第一终端设备获取多个索引，包括：
    所述第一终端设备分别为所述第一组播组中的每个终端设备生成对应的索引，得到所述多个索引。
  3. 根据权利要求1所述的方法，其特征在于，所述第一终端设备获取多个索引，包括：
    所述第一终端设备向网络设备发送所述第一组播组中终端设备的个数；
    所述第一终端设备接收来自所述网络设备的所述多个索引，其中，所述多个索引的个数与所述第一组播组中终端设备的个数相同。
  4. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    所述第一终端设备将所述多个索引中的每个索引分配给所述第一组播组中的每个终端设备。
  5. 根据权利要求1所述的方法，其特征在于，所述第一终端设备获取多个索引，所述多个索引中的任意一个索引分别关联第一组播组中的一个终端设备，包括：
    所述第一终端设备向网络设备发送所述第一组播组中每个终端设备的终端标识；
    所述第一终端设备接收来自所述网络设备的所述多个索引，所述多个索引中的每个索引关联所述第一组播组中的每个终端设备的终端标识。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端设备根据与所述第一终端设备关联的第二索引，确定所述第一终端设备对应的HAQR反馈资源；或者，
    所述第一终端设备根据所述多个索引中除所述第二索引之外的其他索引，确定所述多个索引中除所述第二索引之外的其他每个索引分别关联的终端设备对应的HARQ反馈资源。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述第一终端设备向第二终端设备发送所述第一指示信息，包括：
    所述第一终端设备向所述第二终端设备发送单播消息，所述单播消息中包括所述第一指示信息。
  8. 根据权利要求1-6任一项所述的方法，其特征在于，所述第一终端设备向所述第二终端设备发送所述第一指示信息，包括：
    所述第一终端设备向所述第二终端设备发送所述多个索引中的每个索引关联的所 述第一组播组中的终端设备的标识。
  9. 根据权利要求8所述的方法，其特征在于，所述第一终端设备向所述第二终端设备发送所述多个索引中的每个索引关联的所述第一组播组中的终端设备的标识，包括：
    所述第一终端设备向所述第二终端设备发送单播消息，所述单播消息中包括所述多个索引中的每个索引关联的所述第一组播组中的终端设备的标识；或者，
    所述第一终端设备发送组播消息，所述组播消息中包括所述多个索引中的每个索引关联的所述第一组播组中的终端设备的标识；或者，
    所述第一终端设备发送广播消息，所述广播消息中包括所述多个索引中的每个索引关联的所述第一组播组中的终端设备的标识。
  10. 根据权利要求1-9任一项所述的方法，其特征在于，在所述第一终端设备获取所述多个索引之前，所述方法还包括：
    所述第一终端设备确定所述第一组播组中存在终端设备离开所述第一组播组；或者，
    所述第一终端设备确定存在终端设备加入所述第一组播组。
  11. 根据权利要求1-10任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端设备向所述第二终端设备发送第二指示信息，所述第二指示信息用于指示所述第二终端设备在特定时刻更新所述多个索引。
  12. 一种资源配置方法，其特征在于，所述方法包括：
    第二终端设备接收来自第一终端设备的多个索引和第一指示信息，所述多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，所述多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自动重传请求HARQ反馈资源，所述第一指示信息用于指示所述多个索引中与所述第二终端设备关联的第一索引，所述第一终端设备和所述第二终端设备均处于所述第一组播组；
    所述第二终端设备根据所述第一指示信息，确定所述第二终端设备对应的HARQ反馈资源，所述第二终端设备对应的HARQ反馈资源与所述第一组播组中除所述第二终端设备之外的其他终端设备对应的HARQ反馈资源不同；或者，
    所述第二终端设备根据所述多个索引中除所述第一索引之外的其他索引，确定所述多个索引中除所述第一索引之外的其他每个索引分别对应的HARQ反馈资源，所述每个索引对应的HARQ反馈资源不同。
  13. 根据权利要求12所述的方法，其特征在于，所述第二终端设备接收来自所述第一终端设备的第一指示信息，包括：
    所述第二终端设备接收来自所述第一终端设备的所述多个索引中的每个索引关联的所述第一组播组中的终端设备的标识。
  14. 根据权利要求13所述的方法，其特征在于，所述第二终端设备确定所述多个索引中除所述第一索引之外的其他每个索引分别对应的HARQ反馈资源，包括：
    所述第二终端设备根据所述多个索引中除所述第一索引之外的其他索引，确定所述其他索引中的每个索引分别关联的终端设备对应的HARQ反馈资源。
  15. 根据权利要求12-14任一项所述的方法，其特征在于，所述方法还包括：
    所述第二终端设备接收来自所述第一终端设备的第二指示信息，所述第二指示信息用于指示所述第二终端设备在特定时刻更新所述多个索引。
  16. 一种资源配置方法，其特征在于，所述方法包括：
    终端设备的第一协议层实体获取多个索引，所述多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，所述多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自动重传请求HARQ反馈资源，所述每个索引指示的HARQ反馈资源不同，所述终端设备为所述第一组播组中的任意一个终端设备；
    所述终端设备的第一协议层实体向所述终端设备的第二协议层实体发送第一指示信息和所述多个索引，所述第一指示信息用于指示与所述终端设备关联的第一索引。
  17. 根据权利要求16所述的方法，其特征在于，所述终端设备的第一协议层实体获取多个索引，包括：
    所述终端设备的第一协议层实体获取所述多个索引、以及所述多个索引中的每个索引关联的所述第一组播组中的终端设备的终端标识。
  18. 根据权利要求16或17所述的方法，其特征在于，所述终端设备的第一协议层实体向所述终端设备的第二协议层实体发送所述第一指示信息，包括：
    所述终端设备的第一协议层实体向所述终端设备的第二协议层实体发送所述多个索引中的每个索引关联的所述第一组播组中的终端设备的标识。
  19. 根据权利要求16-18任一项所述的方法，其特征在于，在所述终端设备的第一协议层实体获取多个索引之前，所述方法还包括：
    所述终端设备的第一协议层实体确定所述第一组播组中存在终端设备离开所述第一组播组；或者，所述终端设备的第一协议层实体确定存在终端设备加入所述第一组播组。
  20. 根据权利要求16-19任一项所述的方法，其特征在于，在所述终端设备的第一协议层实体获取多个索引之前，所述方法还包括：
    所述终端设备的第一协议层实体接收来自所述终端设备的第二协议层实体的第二指示信息，所述第二指示信息用于指示所述第一组播组中存在终端设备离开所述第一组播组；或者，
    所述第二指示信息用于指示存在终端设备加入所述第一组播组。
  21. 根据权利要求16-20任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备的第一协议层实体向所述终端设备的第二协议层实体发送第三指示信息，所述第三指示信息用于指示所述终端设备的第二协议层实体在特定时刻更新所述多个索引。
  22. 一种资源配置方法，其特征在于，所述方法包括：
    终端设备的第二协议层实体接收来自所述终端设备的第一协议层实体的多个索引和第一指示信息，所述多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，所述多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自动重传请求HARQ反馈资源，所述第一指示信息用于指示所述多个索引中与所述终端设备关联的第一索引，所述终端设备为所述第一组播组中的任意一个终端设备；
    所述终端设备的第二协议层实体根据所述第一指示信息，确定所述终端设备对应 的HARQ反馈资源，所述终端设备对应的HARQ反馈资源与所述第一组播组中除所述终端设备之外的其他终端设备对应的HARQ反馈资源不同；或者，
    所述终端设备的第二协议层实体根据所述多个索引中除所述第一索引之外的其他索引，确定所述多个索引中除所述第一索引之外的其他每个索引分别对应的HARQ反馈资源，所述每个索引对应的HARQ反馈资源不同。
  23. 根据权利要求22所述的方法，其特征在于，所述终端设备的第二协议层实体接收来自所述终端设备的第一协议层实体的第一指示信息，包括：
    所述终端设备的第二协议层实体接收来自所述终端设备的第一协议层实体的所述多个索引中的每个索引关联的所述第一组播组中的终端设备的标识。
  24. 根据权利要求23所述的方法，其特征在于，所述终端设备的第二协议层实体确定所述多个索引中除所述第一索引之外的其他每个索引分别对应的HARQ反馈资源，包括：
    所述终端设备的第二协议层实体根据所述多个索引中除所述第一索引之外的其他索引，确定所述其他索引中的每个索引分别关联的终端设备对应的HARQ反馈资源。
  25. 根据权利要求22-24任一项所述的方法，其特征在于，所述终端设备的第二协议层实体接收来自所述终端设备的第一协议层实体的多个索引之前，所述方法还包括：
    所述终端设备的第二协议层实体向所述终端设备的第一协议层实体发送第二指示信息，所述第二指示信息用于指示所述第一组播组中存在终端设备离开所述第一组播组；或者，
    所述第二指示信息用于指示存在终端设备加入所述第一组播组。
  26. 根据权利要求22-25任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备的第二协议层实体接收来自所述终端设备的第一协议层实体的第三指示信息，所述第三指示信息用于指示所述终端设备的第二协议层实体在特定时刻更新所述多个索引。
  27. 根据权利要求16-26任一项所述的方法，其特征在于，所述第一协议层实体包括应用层实体或者车联网层实体。
  28. 根据权利要求16-27任一项所述的方法，其特征在于，所述第二协议层包括接入层实体。
  29. 一种第一终端设备，其特征在于，所述第一终端设备包括：处理模块和收发模块；
    所述处理模块，用于获取多个索引，所述多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，所述多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自动重传请求HARQ反馈资源，所述每个索引指示的HARQ反馈资源不同；
    所述处理模块，还用于通过所述收发模块向第二终端设备发送第一指示信息和所述多个索引，所述第一指示信息用于指示所述多个索引中与所述第二终端设备关联的第一索引，所述第二终端设备为所述第一组播组中除所述第一终端设备之外的任意一个终端设备。
  30. 根据权利要求29所述的第一终端设备，其特征在于，所述第一终端设备用于实现权利要求1至11任一项所述的方法。
  31. 一种第二终端设备，其特征在于，所述第二终端设备包括：处理模块和收发模块；
    所述处理模块，用于通过所述收发模块接收来自第一终端设备的多个索引和第一指示信息，所述多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，所述多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自动重传请求HARQ反馈资源，所述第一指示信息用于指示所述多个索引中与所述第二终端设备关联的第一索引，所述第一终端设备和所述第二终端设备均处于所述第一组播组；
    所述处理模块，还用于根据所述第一指示信息，确定所述第二终端设备对应的HARQ反馈资源，所述第二终端设备对应的HARQ反馈资源与所述第一组播组中除所述第二终端设备之外的其他终端设备对应的HARQ反馈资源不同；或者，
    所述处理模块，还用于根据所述多个索引中除所述第一索引之外的其他索引，确定所述多个索引中除所述第一索引之外的其他每个索引分别对应的HARQ反馈资源，所述每个索引对应的HARQ反馈资源不同。
  32. 根据权利要求31所述的第二终端设备，其特征在于，所述第二终端设备用于实现权利要求12至15任一项所述的方法。
  33. 一种终端设备，其特征在于，所述终端设备包括：处理模块和收发模块；
    所述处理模块，用于所述终端设备的第一协议层实体获取多个索引，所述多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，所述多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自动重传请求HARQ反馈资源，所述每个索引指示的HARQ反馈资源不同，所述终端设备为所述第一组播组中的任意一个终端设备；
    所述处理模块，还用于所述终端设备的第一协议层实体通过所述收发模块向所述终端设备的第二协议层实体发送第一指示信息和所述多个索引，所述第一指示信息用于指示与所述终端设备关联的第一索引。
  34. 根据权利要求33所述的终端设备，其特征在于，所述终端设备用于实现权利要求16至21任一项所述的方法。
  35. 一种终端设备，其特征在于，所述终端设备包括：处理模块和收发模块；
    所述处理模块，用于所述终端设备的第二协议层实体通过所述收发模块接收来自所述终端设备的第一协议层实体的多个索引和第一指示信息，所述多个索引中的任意一个索引分别关联第一组播组中的一个终端设备；其中，所述多个索引中的每个索引分别用于指示对应的侧行链路SL上的混合自动重传请求HARQ反馈资源，所述第一指示信息用于指示所述多个索引中与所述终端设备关联的第一索引，所述终端设备为所述第一组播组中的任意一个终端设备；
    所述处理模块，还用于所述终端设备的第二协议层实体根据所述第一指示信息，确定所述终端设备对应的HARQ反馈资源，所述终端设备对应的HARQ反馈资源与所述第一组播组中除所述终端设备之外的其他终端设备对应的HARQ反馈资源不同；或者，
    所述处理模块，还用于所述终端设备的第二协议层实体根据所述多个索引中除所述第一索引之外的其他索引，确定所述多个索引中除所述第一索引之外的其他每个索引分别对应的HARQ反馈资源，所述每个索引对应的HARQ反馈资源不同。
  36. 根据权利要求35所述的终端设备，其特征在于，所述终端设备用于实现权利要求22至28任一项所述的方法。
  37. 一种通信装置，其特征在于，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执行指令，当所述处理器执行所述计算机执行指令时，以使所述通信装置执行如权利要求1-11中任意一项所述的方法；或者，以使所述通信装置执行如权利要求12-15中任意一项所述的方法，或者，以使所述通信装置执行如权利要求16-21中任意一项所述的方法，或者，以使所述通信装置执行如权利要求22-28中任意一项所述的方法。
  38. 一种计算机可读存储介质，其特征在于，包括指令，当其在通信装置上运行时，使得所述通信装置执行如权利要求1-11中任意一项所述的方法，或者，使得所述通信装置执行如权利要求12-15中任意一项所述的方法，或者，使得所述通信装置执行如权利要求16-21中任意一项所述的方法，或者，使得所述通信装置执行如权利要求22-28中任意一项所述的方法。
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