US-12627451-B2 - Wireless communication method and terminal device

US12627451B2US 12627451 B2US12627451 B2US 12627451B2US-12627451-B2

Abstract

A wireless communication method and a terminal device. A first terminal can send feedback information on a plurality of PRBs of an unlicensed frequency band, so that the feedback information occupies a certain proportion of channel bandwidth in a frequency domain to ensure the normal transmission of the feedback information, and realize the use of sidelink communication in the unlicensed frequency band.

Inventors

Zhenshan Zhao
Zhi Zhang
Yi Ding

Assignees

GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Dates

Publication Date: 20260512
Application Date: 20221122

Claims (14)

1 . A wireless sidelink communication method, comprising: sending, by a first terminal, Hybrid Automatic Repeat reQuest (HARQ) feedback information to a second terminal on a plurality of Physical Resource Blocks (PRBs) of a Physical Sidelink Feedback Channel (PSFCH) when the sidelink communication operates in an unlicensed frequency band, wherein the HARQ feedback information is carried by one PRB, and the HARQ feedback information is carried by a symbol sequence; the method further comprises: mapping, by the first terminal, the HARQ feedback information to the plurality of PRBs; the symbol sequence is subject to different cyclic shifts to obtain different cyclic shift sequences; and the different cyclic shift sequences are mapped onto different PRBs of the plurality of PRBs.
2 . The wireless sidelink communication method according to claim 1 , wherein: the method further comprises: mapping, by the first terminal, the HARQ feedback information to the plurality of PRBs according to indication information sent by a network device.
3 . The wireless sidelink communication method according to claim 1 , wherein the symbol sequence is repeatedly mapped onto the plurality of PRBs.
4 . The wireless sidelink communication method according to claim 1 , wherein: a mod (i+j*Δ,N)-th symbol in the symbol sequence is mapped to a i-th RE of a j-th PRB in the plurality of PRBs, where, mod( ) is a remainder function, 0≤i<N, 0≤j<F, i and j are both integers, F is the number of PRBs of the plurality of PRBs, N is the length of the symbol sequence, and Δ is a specific value, wherein Δ is predefined by a standard, or configured or preconfigured by a central control node or a network device.
5 . The wireless sidelink communication method according to claim 4 , wherein: one interleaved resource is formed by F1 PRBs, where F1 is an integer greater than or equal to 1; and the indication information is used to indicate the number R of the interleaved resources occupied by the HARQ feedback information, wherein F1 is predefined by a standard, or configured or preconfigured by a central control node or a network device; and/or a position in frequency domain of the interleaved resource is predefined by a standard, or configured or preconfigured by a central control node or a network device, wherein starting points of R interleaved resources are adjacent in frequency domain.
6 . The wireless sidelink communication method according to claim 2 , wherein one interleaved resource is formed by the plurality of PRBs.
7 . The wireless sidelink communication method according to claim 6 , wherein: an interval in terms of PRBs between consecutive PRBs of the interleaved resource is predefined by a standard, or configured or preconfigured by a central control node or a network device; the number of PRBs of the plurality of PRBs is predefined by a standard, or configured or preconfigured by a central control node or a network device; and/or positions in frequency domain of the plurality of PRBs are predefined by a standard, or configured or preconfigured by the central control node or the network device.
8 . A wireless sidelink communication method, comprising: receiving, by a second terminal, Hybrid Automatic Repeat reQuest (HARQ) feedback information sent by a first terminal on a plurality of Physical Resource Blocks (PRBs) of a Physical Sidelink Feedback Channel (PSFCH) when the sidelink communication operates in an unlicensed frequency band, wherein the HARQ feedback information is carried by one PRB, the HARQ feedback information is carried by a symbol sequence, and the HARQ feedback information is mapped to the plurality of PRBs; the symbol sequence is subject to different cyclic shifts to obtain different cyclic shift sequences; and the different cyclic shift sequences are mapped onto different PRBs of the plurality of PRBs.
9 . The wireless sidelink communication method according to claim 8 , wherein: the HARQ feedback information is mapped to the plurality of PRBs according to indication information sent by a network device.
10 . The wireless sidelink communication method according to claim 9 , wherein one interleaved resource is formed by the plurality of PRBs, and/or wherein the interval in terms of PRBs between consecutive PRBs of the interleaved resource is predefined by a standard, or configured or preconfigured by a central control node or a network device.
11 . The wireless sidelink communication method according to claim 8 , wherein: the number of PRBs of the plurality of PRBs is predefined by a standard, or configured or preconfigured by a central control node or a network device; and/or positions in frequency domain of the plurality of PRBs are predefined by a standard, or configured or preconfigured by a central control node or a network device.
12 . The wireless sidelink communication method according to claim 8 , wherein, on a same data symbol, the plurality of PRBs configured to send the HARQ feedback information is completely different from at least one PRB configured to send the physical sidelink shared channel.
13 . The wireless sidelink communication method according to claim 8 , wherein a proportion, occupied by the plurality of PRBs, of an entire bandwidth is greater than or equal to 80%.
14 . A terminal device, comprising: a processor and a memory, wherein the memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory, to perform a wireless sidelink communication method, comprising: sending Hybrid Automatic Repeat reQuest (HARQ) feedback information to a second terminal on a plurality of Physical Resource Blocks (PRBs) of a Physical Sidelink Feedback Channel (PSFCH) when the sidelink communication operates in an unlicensed frequency band, wherein the HARQ feedback information is carried by one PRB, and the HARQ feedback information is carried by a symbol sequence; the method further comprises: mapping the HARQ feedback information to the plurality of PRBs; the symbol sequence is subject to different cyclic shifts to obtain different cyclic shift sequences; and the different cyclic shift sequences are mapped onto different PRBs of the plurality of PRBs.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) The present application is a continuation application of PCT Application No. PCT/CN2020/091886, entitled “WIRELESS COMMUNICATION METHOD AND TERMINAL DEVICE” filed on May 22, 2020, the entire disclosure of which is incorporated herein as a part of the present application for all purposes. TECHNICAL FIELD Embodiments of the present disclosure relate to the field of communication, and more particularly, to a wireless communication method and a terminal device. BACKGROUND New Radio (NR) Vehicle to Everything (V2X) supports a Hybrid Automatic Repeat Request (HARQ) feedback from a receiving terminal to a transmitting terminal. Specifically, FIG. 1 is a schematic diagram of a sidelink HARQ feedback process provided by the present application. As shown in FIG. 1, in S101, the transmitting terminal sends a Physical Sidelink Shared Channel (PSSCH) scheduled by one or more Physical Sidelink Control Channels (PSCCHs) to the receiving terminal; in S102, the receiving terminal generates HARQ feedback information according to one or more PSCCH/PSSCH reception results; and in S103, the receiving terminal sends the HARQ feedback information to the transmitting terminal through a Physical Sidelink Feedback Channel (PSFCH). With the HARQ feedback information, the transmitting terminal can dynamically adjust the number of retransmissions of a data block, which facilitates to improve utilization of a radio resource and reliability of the data transmission. When sidelink communication operates in an unlicensed frequency band, any feedback information sent by the terminal, such as the above-mentioned HARQ feedback information, needs to occupy more than 80% of a channel bandwidth in frequency domain. Otherwise, devices operating in the same unlicensed frequency band will likely perform channel monitoring on the current time-frequency resource, and consider that the next time-frequency resource meets a resource selection condition. This will eventually lead to a plurality of devices sending information on the same time-frequency resource, causing serious mutual interference. However, in the prior art, the PSFCH only occupies one Physical Resource Block (PRB) in frequency domain, and one PRB is typically less than 80% of the channel bandwidth, thereby resulting in the failure of the above mentioned sidelink communication to be applied to the unlicensed frequency band. SUMMARY Embodiments of the present disclosure provide a wireless communication method and a terminal device. By sending feedback information to a second terminal on a plurality of PRBs in an unlicensed frequency band, the feedback information occupies a certain proportion of a channel bandwidth in frequency domain, thereby ensuring normal transmission of the feedback information, and realizing an application of sidelink communication on the unlicensed frequency band. In a first aspect, there is provided a wireless communication method, and the method includes: sending, by a first terminal, feedback information to a second terminal on a plurality of Physical Resource Blocks (PRBs) in an unlicensed frequency band. In a second aspect, there is provided a wireless communication method, and the method includes: receiving, by a second terminal, feedback information sent by a first terminal on a plurality of Physical Resource Blocks (PRBs) in an unlicensed frequency band. In a third aspect, there is provided a terminal device, configured to perform the method in the first aspect or each implementation thereof as described above. Specifically, the terminal device includes functional modules configured to perform the method in the first aspect or each implementation thereof as described above. In a fourth aspect, there is provided a terminal device, configured to perform the method in the second aspect or each implementation thereof as described above. Specifically, the terminal device includes functional modules configured to perform the method in the second aspect or each implementation thereof as described above. In a fifth aspect, there is provided a terminal device, including a processor and a memory. The memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory to perform the method in the first aspect or each implementation thereof as described above. In a sixth aspect, there is provided a terminal device, including a processor and a memory. The memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory to perform the method in the second aspect or each implementation thereof as described above. In a seventh aspect, there is provided an apparatus for implementing the method in any one of the first aspect to the second aspect or each implementation thereof as described above. Specifically, the apparatus includes: a processor, configured to call and run a computer program