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EP-4742709-A2 - WIRELESS COMMUNICATION METHOD AND TERMINAL DEVICE

EP4742709A2EP 4742709 A2EP4742709 A2EP 4742709A2EP-4742709-A2

Abstract

Embodiments of the present application provide a wireless communication method and a terminal device. One PSSCH corresponds to multiple PSFCH transmission occasions, thereby increasing transmission occasions of a PSFCH carrying feedback information corresponding to a PSSCH, so that the terminal device can use an unlicensed spectrum to perform sidelink transmission, thereby optimizing NRSL transmission. The wireless communication method comprises: a terminal device determining a number M of PSFCH transmission occasions corresponding to a first PSSCH, different PSFCH transmission occasions of the M PSFCH transmission occasions corresponding to different time domain resources; for an m-th PSFCH transmission occasion of the M PSFCH transmission occasions, the terminal device, according to a result of a channel access procedure, determining whether to use the m-th PSFCH transmission occasion to transmit a PSFCH carrying feedback information corresponding to t e first PSSCH, M and m e ing positive integers, M ≥ 2, and 1 ≤ m ≤ M.

Inventors

  • ZHAO, ZHENSHAN
  • Zhang, Shichang
  • MA, Teng

Assignees

  • GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Dates

Publication Date
20260513
Application Date
20211022

Claims (15)

  1. A method for wireless communication, comprising: determining, by a terminal device, M physical sidelink feedback channel (PSFCH) transmission occasions corresponding to a first physical sidelink shared channel (PSSCH), wherein different PSFCH transmission occasions in the M PSFCH transmission occasions correspond to different time-domain resources, respectively; and for an m-th PSFCH transmission occasion in the M PSFCH transmission occasions, determining, by the terminal device according to a result of a channel access procedure, whether to transmit a PSFCH carrying feedback information corresponding to the first PSSCH by using the m-th PSFCH transmission occasion, wherein M and m are positive integers, M ≥ 2, and 1 ≤ m ≤ M.
  2. The method of claim 1, wherein determining, by the terminal device, the M PSFCH transmission occasions corresponding to the first PSSCH comprises: determining, by the terminal device, the M PSFCH transmission occasions corresponding to the first PSSCH in a set of PSFCH transmission slots configured by resource pool configuration information.
  3. The method of claim 2, further comprising: determining, by the terminal device according to an index value m, a PSFCH transmission resource in a PSFCH transmission resource set which is comprised in the slot where the m-th PSFCH transmission occasion in the M PSFCH transmission occasions is located, m is a positive integer and 1 ≤ m ≤ M.
  4. The method of claim 3, wherein each PSFCH transmission slot in the set of PSFCH transmission slots comprises M PSFCH resource subsets; and determining, by the terminal device according to the index value m, the PSFCH transmission resource in the PSFCH transmission resource set which is comprised in the slot where the m-th PSFCH transmission occasion is located comprises: determining, by the terminal device, that the PSFCH transmission resource of the m-th PSFCH transmission occasion corresponding to the first PSSCH is located in an m-th PSFCH resource subset in the slot where the m-th PSFCH transmission occasion is located.
  5. The method of claim 4, further comprising: determining, by the terminal device, the PSFCH transmission resource in the m-th PSFCH resource subset in the slot where the m-th PSFCH transmission occasion is located according to at least one of: a sub-channel index corresponding to a frequency-domain starting position of the first PSSCH; a number of sub-channels corresponding to a frequency-domain resource size occupied by the first PSSCH; slot information of the first PSSCH; identity (ID) information of a transmitting device for the first PSSCH; or ID information of the terminal device.
  6. A terminal device, comprising a first processing unit and a second processing unit, wherein the first processing unit is configured to determine M physical sidelink feedback channel (PSFCH) transmission occasions corresponding to a first physical sidelink shared channel (PSSCH), wherein different PSFCH transmission occasions in the M PSFCH transmission occasions correspond to different time-domain resources, respectively; and for an m-th PSFCH transmission occasion in the M PSFCH transmission occasions, the second processing unit is configured to determine, according to a result of a channel access procedure, whether to transmit a PSFCH carrying feedback information corresponding to the first PSSCH by using the m-th PSFCH transmission occasion, wherein M and m are positive integers, M ≥ 2, and 1 ≤ m ≤ M.
  7. The terminal device of claim 6, wherein the second processing unit is specifically configured to: determine to transmit the PSFCH carrying the feedback information corresponding to the first PSSCH by using the m-th PSFCH transmission occasion in case that the result of the channel access procedure indicates a channel being idle; otherwise determine to not transmit the PSFCH carrying the feedback information corresponding to the first PSSCH by using the m-th PSFCH transmission occasion; or discard sidelink transmission corresponding to the m-th PSFCH transmission occasion.
  8. The terminal device of claim 6 or 7, wherein at most one PSFCH carrying the feedback information corresponding to the first PSSCH is transmitted by the terminal device in the M PSFCH transmission occasions.
  9. The terminal device of any one of claims 6 to 8, wherein the first processing unit is specifically configured to: determine the M PSFCH transmission occasions corresponding to the first PSSCH in a set of PSFCH transmission slots configured by resource pool configuration information.
  10. The terminal device of claim 9, wherein the first processing unit is specifically configured to: determine a slot where a first PSFCH transmission occasion in the M PSFCH transmission occasions is located according to a slot where the first PSSCH is located and a minimum time gap between the first PSSCH and a PSFCH associated with the first PSSCH; and determine slot(s) where remaining M-1 PSFCH transmission occasions in the M PSFCH transmission occasions are located according to the slot where the first PSFCH transmission occasion is located and a PSFCH period.
  11. The terminal device of claim 10, wherein the first processing unit is specifically configured to: determine a slot where an A-th PSFCH transmission occasion in the M PSFCH transmission occasions is located according to the following formula: n ′ + K 1 × A − 1 × P ; where n'represents the slot where the first PSFCH transmission occasion is located, A is a positive integer and 2 ≤ A ≤ M, K1 is a positive integer, K1 is determined by pre-definition, pre-configuration or configuration information from a network device, and P represents the PSFCH period.
  12. A chip, comprising a processor configured to call a computer program stored in a memory to and run the computer program, to cause a device mounted with the chip to perform the method according to any one of claims 1 to 5.
  13. A computer-readable storage medium, configured to store a computer program which, when being run on a computer, causes the computer to perform the method according to any one of claims 1 to 5.
  14. A computer program product, comprising computer program instructions which, when being run on a computer, cause the computer to perform the method according to any one of claims 1 to 5.
  15. A computer program, wherein the computer program product, when being run on a computer, causes the computer to perform the method according to any one of claims 1 to 5.

Description

TECHNICAL FIELD The disclosure relates to the field of communications, and particularly to a method for wireless communication and a terminal device. BACKGROUND In new radio (NR) sidelink (SL) transmission, physical sidelink shared channels (PSSCHs) correspond to transmission resources of physical sidelink feedback channel (PSFCH) one by one, i.e., for each PSSCH transmission, receiving end terminal(s) may determine a unique PSFCH transmission resource and perform sidelink feedback on the PSFCH transmission resource. When sidelink-based transmission (such as device to device (D2D) or vehicle to everything (V2X) transmission) works in unlicensed spectrum, the terminal device needs to meet transmission requirements of the unlicensed spectrum before performing the sidelink transmission. For example, the terminal device may determine, through listen before talk (LBT), whether a channel can be accessed. Specifically, the terminal device monitors whether the channel is idle, and when the channel is idle, the terminal device may perform the sidelink transmission, otherwise, the sidelink transmission may not be performed. When the receiving end terminal(s) needs to send a PSFCH to feed back an acknowledgement (ACK), the PSFCH may not be sent if the channel is determined to be busy through the LBT. In such situation, the transmitting end terminal(s) may not detect the PSFCH and may determine that it is a discontinuous transmission (DTX), and will retransmit the sidelink data, which may lead to a waste of resources. SUMMARY Embodiments of the present disclosure provide a method for wireless communication and a terminal device. One PSSCH corresponds to multiple PSFCH transmission occasions, thereby increasing transmission occasions of PSFCH carrying feedback information corresponding to the PSSCH, so that the terminal device can perform sidelink transmission by using the unlicensed spectrum, thereby optimizing NR SL transmission. In a first aspect, there is provided a method for wireless communication, the method includes the following operations. A terminal device determines M PSFCH transmission occasions corresponding to a first PSSCH. Different PSFCH transmission occasions in the M PSFCH transmission occasions correspond to different time-domain resources, respectively. For an m-th PSFCH transmission occasion in the M PSFCH transmission occasions, the terminal device determines, according to a result of a channel access procedure, whether to transmit a PSFCH carrying feedback information corresponding to the first PSSCH by using the m-th PSFCH transmission occasion. M and m are positive integers, M ≥ 2, and 1 ≤ m ≤ M. In a second aspect, there is provided a terminal device, which is configured to perform the above method in the first aspect. Specifically, the terminal device includes functional modules configured to perform the above method in the first aspect. In a third aspect, there is provided a terminal device, which includes a processor and a memory. The memory is configured to store a computer program, and the processor is configured to call the computer program stored in the memory and run the computer program to perform the above method in the first aspect. In a fourth aspect, there is provided an apparatus, which is configured to perform the above method in the first aspect. Specifically, the apparatus includes a processor, the processor is configured to call a computer program stored in a memory and run the computer program, to cause a device mounted with the apparatus to perform the above method in the first aspect. In a fifth aspect, there is provided a computer-readable storage medium, which is configured to store a computer program which, when being run on a computer, causes the computer to perform the above method in the first aspect. In a sixth aspect, there is provided a computer program product, which includes computer program instructions which, when being run on a computer, cause the computer to perform the above method in the first aspect. In a seventh aspect, there is provided a computer program which, when being run on a computer, causes the computer to perform the above method in the first aspect. According to the above technical solution, the terminal device determines the M PSFCH transmission occasions corresponding to the first PSSCH, and determines, according to the result of the channel access procedure, whether to transmit the PSFCH carrying feedback information corresponding to the first PSSCH by using a certain PSFCH transmission occasion. Therefore, transmission occasions of the PSFCH carrying the feedback information corresponding to the PSSCH can be increased, so that the terminal device can perform sidelink transmission by using the unlicensed spectrum, thereby optimizing NR SL transmission. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of architecture of a communication system applied in an embodiment of the disclosure.FIG. 2 is a schematic diagram of architec