Method for determining channel access parameter, terminal device, and network device
View Patent ↗Embodiments of the present disclosure provide a wireless communication method, a terminal device, and a network device. The terminal device can improve channel access efficiency on the shared spectrum. The wireless communication method includes: receiving, by a terminal device, first DCI transmitted by a network device, where the first DCI is used to schedule a sidelink transmission of the terminal device, or the first DCI is used to activate a sidelink CG or SPS configuration of the terminal device, or the first DCI is used to deactivate a sidelink CG or SPS configuration of the terminal device, the first DCI corresponding to first feedback information that is transmitted via a first uplink channel on a shared spectrum; and determining, by the terminal device, a channel access parameter corresponding to the first uplink channel according to first indication information and/or a predetermined rule.
1 . A wireless communication method, comprising:
receiving, by a terminal device, first Downlink Control Information (DCI) transmitted by a network device,
wherein the first DCI is used to schedule a sidelink transmission of the terminal device, or the first DCI is used to activate a sidelink Configured Grant (CG) or Semi-Persistent Scheduling (SPS) configuration of the terminal device, or the first DCI is used to deactivate a sidelink CG or SPS configuration of the terminal device, the first DCI corresponding to first feedback information that is transmitted via a first uplink channel on a shared spectrum; and
determining, by the terminal device, a channel access parameter corresponding to the first uplink channel according to first indication information and a predetermined rule;
wherein determining, by the terminal device, the channel access parameter corresponding to the first uplink channel according to the first indication information and the predetermined rule comprises:
the predetermined rule predefining that the first uplink channel corresponds to a first channel access type, and when the first indication information indicates that the first uplink channel corresponds to a second channel access type, determining, by the terminal device, that the first uplink channel corresponds to the second channel access type;
wherein the first channel access type comprises Type 1 channel access, and the second channel access type comprises one of Type 2A channel access, Type 2B channel access, or Type 2C channel access.
2 . The method according to claim 1 , wherein the channel access parameter corresponding to the first uplink channel comprises at least one of: a channel access type, a Cyclic Prefix Extension (CPE) length, a Channel Access Priority Class (CAPC), or a channel access process.
3 . The method according to claim 1 , wherein determining, by the terminal device, the channel access parameter corresponding to the first uplink channel according to the first indication information and the predetermined rule further comprises:
the predetermined rule predefining that the first uplink channel corresponds to a first channel access process, and when the first indication information indicates that the first uplink channel corresponds to a second channel access process, determining, by the terminal device, that the first uplink channel corresponds to the second channel access process.
4 . The method according to claim 1 , wherein determining, by the terminal device, the channel access parameter corresponding to the first uplink channel according to the first indication information and the predetermined rule further comprises:
determining, by the terminal device, a CPE length corresponding to the first uplink channel according to the first indication information; or
determining, by the terminal device, the CPE length corresponding to the first uplink channel as 0.
5 . The method according to claim 1 , wherein the first indication information indicates a channel access type and/or a CPE length.
6 . The method according to claim 1 , wherein the first indication information is carried in the first DCI, wherein the first uplink channel is a first PUCCH, and the first DCI comprises time domain position indication information and/or PUCCH resource indication information for the first PUCCH, or
wherein the first indication information is transmitted by the network device via Radio Resource Control (RRC) signaling or Medium Access Control Control Element (MAC CE) signaling.
7 . The method according to claim 1 , wherein the first DCI corresponds to first feedback information, and the first feedback information comprises at least one of:
feedback information corresponding to the sidelink transmission of the terminal device scheduled by the first DCI;
corresponding feedback information when the first DCI activates a sidelink CG or SPS configuration of the terminal device; or
corresponding feedback information when the first DCI deactivates the sidelink CG or SPS configuration of the terminal device.
8 . The method according to claim 1 , wherein the first DCI being used to schedule the sidelink transmission of the terminal device comprises:
the first DCI being used to schedule at least one of a Physical Sidelink Control Channel (PSCCH) or a Physical Sidelink Shared Channel (PSSCH) of the terminal device.
9 . The method according to claim 1 , wherein the first DCI corresponds to a first DCI format, and the first DCI format comprises at least one of DCI format 3_0 or DCI format 3_1.
10 . The method according to claim 1 , wherein the first DCI comprises third indication information indicating whether to request a Type-3 codebook feedback.
11 . The method according to claim 1 , wherein determining, by the terminal device, the channel access parameter corresponding to the first uplink channel according to the first indication information and the predetermined rule further comprises:
determining, by the terminal device, the channel access parameter corresponding to the first uplink channel according to the predetermined rule, wherein the first DCI does not include the first indication information that is channel access indication information.
12 . A terminal device, comprising a processor and a memory, wherein the memory has a computer program stored thereon, and the processor is configured to invoke and execute the computer program stored in the memory to:
receive first Downlink Control Information (DCI) transmitted by a network device,
wherein the first DCI is used to schedule a sidelink transmission of the terminal device, or the first DCI is used to activate a sidelink Configured Grant (CG) or Semi-Persistent Scheduling (SPS) configuration of the terminal device, or the first DCI is used to deactivate a sidelink CG or SPS configuration of the terminal device, the first DCI corresponding to first feedback information that is transmitted via a first uplink channel on a shared spectrum; and
determine a channel access parameter corresponding to the first uplink channel according to first indication information and a predetermined rule;
wherein determining the channel access parameter corresponding to the first uplink channel according to the first indication information and the predetermined rule comprises:
the predetermined rule predefining that the first uplink channel corresponds to a first channel access type, and when the first indication information indicates that the first uplink channel corresponds to a second channel access type, determining that the first uplink channel corresponds to the second channel access type;
wherein the first channel access type comprises Type 1 channel access, and the second channel access type comprises one of Type 2A channel access, Type 2B channel access, or Type 2C channel access.
13 . The terminal device according to claim 12 , wherein the channel access parameter corresponding to the first uplink channel comprises at least one of: a channel access type, a Cyclic Prefix Extension (CPE) length, a Channel Access Priority Class (CAPC), or a channel access process.
14 . The terminal device according to claim 12 , wherein determining the channel access parameter corresponding to the first uplink channel according to the first indication information and the predetermined rule further comprises:
the predetermined rule predefining that the first uplink channel corresponds to a first channel access process, and when the first indication information indicates that the first uplink channel corresponds to a second channel access process, determining that the first uplink channel corresponds to the second channel access process.
15 . The terminal device according to claim 12 , wherein determining the channel access parameter corresponding to the first uplink channel according to the first indication information and the predetermined rule further comprises:
determining a CPE length corresponding to the first uplink channel according to the first indication information; or
determining the CPE length corresponding to the first uplink channel as 0.
16 . The terminal device according to claim 12 , wherein the first indication information indicates a channel access type and/or a CPE length.
17 . The terminal device according to claim 12 , wherein the first indication information is carried in the first DCI, wherein the first uplink channel is a first PUCCH, and the first DCI comprises time domain position indication information and/or PUCCH resource indication information for the first PUCCH, or
wherein the first indication information is transmitted by the network device via Radio Resource Control (RRC) signaling or Medium Access Control Control Element (MAC CE) signaling.
18 . The terminal device according to claim 12 , wherein the first DCI corresponds to first feedback information, and the first feedback information comprises at least one of:
feedback information corresponding to the sidelink transmission of the terminal device scheduled by the first DCI;
corresponding feedback information when the first DCI activates a sidelink CG or SPS configuration of the terminal device; or
corresponding feedback information when the first DCI deactivates the sidelink CG or SPS configuration of the terminal device.
19 . The terminal device according to claim 12 , wherein the first DCI being used to schedule the sidelink transmission of the terminal device comprises:
the first DCI being used to schedule at least one of a Physical Sidelink Control Channel (PSCCH) or a Physical Sidelink Shared Channel (PSSCH) of the terminal device.
20 . The terminal device according to claim 12 , wherein the first DCI corresponds to a first DCI format, and the first DCI format comprises at least one of DCI format 3_0 or DCI format 3_1.