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EP-4156811-B1 - SIDELINK FEEDBACK RESOURCE CONFIGURATION METHOD, TERMINAL DEVICE, AND NETWORK DEVICE

EP4156811B1EP 4156811 B1EP4156811 B1EP 4156811B1EP-4156811-B1

Inventors

  • ZHAO, ZHENSHAN

Dates

Publication Date
20260513
Application Date
20200521

Claims (14)

  1. A method for configuring a sidelink, SL, feedback resource, comprising: obtaining (S101), by a first terminal device, resource pool configuration information, the resource pool configuration information comprising resource pool indication information of a transmission resource of a SL data channel and resource pool indication information of a transmission resource of a SL feedback channel, wherein the SL data channel is for transmitting first SL data, and the SL feedback channel comprises a first-type SL feedback channel and a second-type SL feedback channel; characterized in that : the resource pool indication information of the transmission resource of the SL feedback channel comprises third indication information, and the third indication information is used for determining a number of transmissions of the SL feedback channel, wherein the number of transmissions is greater than one.
  2. The method of claim 1, wherein the resource pool indication information of the transmission resource of the SL feedback channel comprises first SL feedback resource pool indication information, the first SL feedback resource pool indication information is used for determining a transmission resource of the first-type SL feedback channel, and the first-type SL feedback channel is associated with the first SL data.
  3. The method of claim 2, wherein the first-type SL feedback channel is for carrying at least one of: hybrid automatic repeat request-acknowledgement, HARQ-ACK, information, channel quality indicator, CQI, information, rank indicator, RI, information, pre-coding matrix indicator, PMI, information, beam information, reference signal index information, power adjustment information, or measurement information.
  4. The method of any of claims 1-3, wherein the resource pool indication information of the transmission resource of the SL feedback channel comprises second SL feedback resource pool indication information, the second SL feedback resource pool indication information is used for determining a transmission resource of the second-type SL feedback channel, and the second-type SL feedback channel is associated with the first SL data.
  5. The method of claim 4, wherein the second-type SL feedback channel comprises a first sequence, and SL feedback information corresponding to the first SL data is carried by the first sequence.
  6. The method of any of claims 1-5, wherein the resource pool indication information of the transmission resource of the SL feedback channel comprises second indication information, and the second indication information is used for determining a number of transmission resources of the SL feedback channel, wherein the number of the transmission resources of the SL feedback channel is greater than or equal to one.
  7. The method of any of claims 1-6, further comprising: obtaining, by the first terminal device, fifth indication information; and determining, according to the fifth indication information, to transmit the SL feedback information using the first-type SL feedback channel or the second-type SL feedback channel.
  8. The method of any of claims 1-7, further comprising: determining, by the first terminal device according to a number of bits of the SL feedback information, to transmit the SL feedback information using the first-type SL feedback channel or the second-type SL feedback channel.
  9. The method of any of claims 1-8, further comprising: determining, by the first terminal device according to a type of the SL feedback information, to transmit the SL feedback information using the first-type SL feedback channel or the second-type SL feedback channel.
  10. A method for configuring a sidelink, SL, feedback resource, comprising: transmitting (S201), by a first communication device to a first terminal device, resource pool configuration information, the resource pool configuration information comprising resource pool indication information of a transmission resource of a SL data channel and resource pool indication information of a transmission resource of a SL feedback channel, wherein the SL data channel is for transmitting first SL data, and the SL feedback channel comprises a first-type SL feedback channel and a second-type SL feedback channel; characterized in that : the resource pool indication information of the transmission resource of the SL feedback channel comprises third indication information, and the third indication information is used for determining a number of transmissions of the SL feedback channel, wherein the number of transmissions is greater than one.
  11. The method of claim 10, wherein the resource pool indication information of the transmission resource of the SL feedback channel comprises first SL feedback resource pool indication information, the first SL feedback resource pool indication information is used for determining a transmission resource of the first-type SL feedback channel, and the first-type SL feedback channel is associated with the first SL data.
  12. A terminal device (600), comprising: a processor (610); and a memory (620) for storing a computer program which, when executed by the processor (610), causes the processor (610) to carry out any of the method of claims 1-9.
  13. A network device (600), comprising: a processor (610); and a memory (620) for storing a computer program which, when executed by the processor (610), causes the processor (610) to carry out any of the method of claims 10-11.
  14. A computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to carry out any of the method of claims 1-11.

Description

TECHNICAL FIELD This application relates to the field of communication, and in particular to a method for configuring a sidelink feedback resource, a terminal device, and a network device. BACKGROUND Device to Device (D2D) and Vehicle to Everything (V2X, also known as Internet of Vehicles) technologies are important parts of mobile communications. In D2D or V2X scenarios, direct communication between devices are supported through sidelink (SL) transmission technologies. Generally, "sidelink" refers to a communication link between terminals. The link between terminals can be applied to communication nodes in any scenario, such as in-vehicle scenario, home scenario, etc., where communication nodes do not require network coverage. Therefore, compared to an uplink or downlink in a cellular system where data transmission is done through a base station, the SL transmission allows higher spectral efficiency and lower transmission latency. The V2X system supports two transmission modes. In transmission mode 1, transmission resources of a terminal are allocated by the base station, and the terminal transmits SL data on SL according to the resources allocated by the base station. In transmission mode 2, the terminal selects resources in a resource pool for SL transmission. With continuous evolution of the next-generation mobile communication new radio (5G NR) system, especially the development of autonomous driving technology, higher requirements such as higher throughput, lower latency, higher reliability, larger coverage, and more flexible resource allocation, are placed on SL data interaction between multiple terminals in the V2X system. In NR-V2X system, in order to improve transmission reliability, a physical sidelink feedback channel (PSFCH) is introduced. A transmitting terminal transmits SL data to a receiving terminal, and the receiving terminal transmits SL feedback information to the transmitting terminal, where the SL feedback information is carried in the PSFCH. The transmitting terminal then determines whether to retransmit the SL data according to the SL feedback information. Currently, the NR-V2X system only supports one PSFCH format for the PSFCH, and the PSFCH format only supports carrying SL feedback information of one bit. With the evolution of technology, this PSFCH format can no longer satisfy the requirements for SL data transmission. "Physical Layer Procedures for NR V2X Sidelink", R1-1900794, discusses the physical layer procedure details related to HARQ schemes, physical layer IDs, CSI acquisition and link adaptation, PSFCH formats and resources, and power control, and also provides views on resource pool multiplexing of unicast, groupcast and broadcast, as well as beam management for FR2. "Updated feature lead summary for agenda item 7.2.4.1.2 Physical layer procedures", R1-1814265, is summary document for AI 7.2.4.1.2 Physical layer procedures, based on the contributions listed in the reference section. "Physical Layer Procedures for Sidelink", R1-1911110, discusses open issues related to NR V2X PHY procedures. "Physical layer procedure for NR-V2X sidelink", R1-1910375, discusses the physical layer procedures, such as feedback mechanism, multiple antenna transmission for PSCCH and PSSCH and power control. CN110545533A discloses an Internet of Vehicles feedback resource configuration method and terminal equipment, and solves the problem that the existing method and equipment do not clearly indicate the mapping relationship between PSSCH and PSFCH in Internet of Vehicles communication. HARQ feedback information of transmission blocks of a side link is fed back through a feedback channel, each resource block bears one or more transmission blocks, and configuration information comprises frequency domain position indication information used for representing the frequency domain positions of the resource blocks and is further used for indexing feedback resource configuration information in the configuration information; the relationship between the feedback resource configuration information and the feedback channel is that the resource configuration of the feedback channel is indicated by the feedback resource configuration information. The method is also applied to an Internet of Vehicles sending terminal and an Internet of Vehicles receiving terminal. The equipment uses the method. According to the invention, the resource allocation of the feedback channel of the Internet of Vehicles is realized. SUMMARY To this end, a method for configuring a sidelink (SL) feedback resource, a terminal device, and a network device are provided in implementations of the disclosure, which can configure transmission resources for different types of SL feedback channels. A method for configuring a SL feedback resource is provided in implementations of the disclosure as set out in claim 1. Additional features are set out in claims 2 to 9. A method for configuring a SL feedback resource is provided in implementati