Sidelink communication method and communication apparatus
This application provides a sidelink communication method. The method includes: A first terminal device determines one or more pieces of first configuration information, where the one or more pieces of first configuration information correspond to one or more sidelinks, each piece of the first configuration information is used to configure a discontinuous reception DRX related parameter of a corresponding sidelink, and the first terminal device is a sending device or a receiving device on the one or more sidelinks. The first terminal device maintains, based on each piece of the first configuration information, a status of the discontinuous reception DRX corresponding to each piece of the first configuration information.
1 . A method comprising:
determining, by a first terminal device, a first resource;
selecting, by the first terminal device, a second terminal device from one or more sidelink devices to send data to on the first resource, wherein the second terminal device is selected, by the first terminal device, based on a time domain range of the first resource and a discontinuous reception (DRX) active time of the second terminal device, wherein the DRX active time of the second terminal device partially or completely overlaps the first resource in a time domain; and
sending, by the first terminal device, the data to the second terminal device on the first resource.
2 . The method according to claim 1 , wherein the determining, by the first terminal device, the first resource comprises:
receiving, by the first terminal device, sidelink grant information from a network device, based on which the first resource is determined by the first terminal device; or
obtaining, by the first terminal device, the first resource from a sidelink resource used for contention.
3 . The method according to claim 2 , wherein the obtaining, by the first terminal device, the first resource from the sidelink resource used for contention comprises:
determining, by the first terminal device based on the DRX active time of the second terminal device, the first resource from the sidelink resource used for contention, the first resource being in the DRX active time of the second terminal device.
4 . The method according to claim 3 , wherein the determining, by the first terminal device based on the DRX active time of the second terminal device, the first resource from the sidelink resource used for contention comprises:
sending, by a media access control (MAC) layer of the first terminal device, the DRX active time of the second terminal device to a physical layer of the first terminal device; and
determining, by the first terminal device, the first resource from the sidelink resource used for contention based on the DRX active time of the second terminal device.
5 . The method according to claim 1 , further comprising:
determining, by the first terminal device, first configuration information corresponding to a sidelink, the first configuration information comprising a DRX related parameter of the sidelink, and the first terminal device being a sending device or a receiving device on the sidelink; and
maintaining, by the first terminal device based on the first configuration information, a status of a DRX corresponding to the first configuration information.
6 . An apparatus, comprising:
at least one processor, and a memory storing instructions for execution by the at least one processor;
wherein, when executed, the instructions cause the apparatus to perform operations comprising:
determining a first resource;
selecting a second terminal device from one or more sidelink devices to send data to on the first resource, wherein the second terminal device is selected, by the apparatus, based on a time domain range of the first resource and a discontinuous reception (DRX) active time of the second terminal device, wherein the DRX active time of the second terminal device partially or completely overlaps the first resource in a time domain; and
sending the data to the second terminal device on the first resource.
7 . The apparatus according to claim 6 , wherein the determining the first resource comprises:
receiving sidelink grant information from a network device, based on which the first resource is determined by the apparatus; or
obtaining the first resource from a sidelink resource used for contention.
8 . The apparatus according to claim 7 , wherein the obtaining the first resource from the sidelink resource used for contention comprises:
determining, based on the DRX active time of the second terminal device, the first resource from the sidelink resource used for contention, the first resource being in the DRX active time of the second terminal device.
9 . The apparatus according to claim 8 , wherein the determining, based on the DRX active time of the second terminal device, the first resource from the sidelink resource used for contention comprises:
sending, by a media access control (MAC) layer of the apparatus, the DRX active time of the second terminal device to a physical layer; and
determining the first resource from the sidelink resource used for contention based on the DRX active time of the second terminal device.
10 . The apparatus according to claim 6 , wherein the operations further comprise:
determining first configuration information corresponding to a sidelink, the first configuration information comprising a DRX related parameter of the sidelink; and
maintaining, based on the first configuration information, a status of a DRX corresponding to the first configuration information.
11 . A non-transitory computer readable storage medium comprising computer-executable instructions that, when executed by at least one processor of a first terminal device, cause the first terminal device to perform operations comprising:
determining a first resource;
selecting a second terminal device from one or more sidelink devices to send data to on the first resource, wherein the second terminal device is selected based on a time domain range of the first resource and a discontinuous reception (DRX) active time of the second terminal device, wherein the DRX active time of the second terminal device partially or completely overlaps the first resource in a time domain; and
sending the data to the second terminal device on the first resource.
12 . The non-transitory computer readable storage medium according to claim 11 , wherein the determining the first resource comprises:
receiving sidelink grant information from a network device, based on which the first resource is determined by the first terminal device; or
obtaining the first resource from a sidelink resource used for contention.
13 . The non-transitory computer readable storage medium according to claim 12 , wherein the obtaining the first resource from the sidelink resource used for contention comprises:
determining, based on the DRX active time of the second terminal device, the first resource from the sidelink resource used for contention, the first resource being in the DRX active time of the second terminal device.
14 . The non-transitory computer readable storage medium according to claim 13 , wherein the determining, based on the DRX active time of the second terminal device, the first resource from the sidelink resource used for contention comprises:
sending, by a media access control (MAC) layer of the first terminal device, the DRX active time of the second terminal device to a physical layer of the first terminal device; and
determining the first resource from the sidelink resource used for contention based on the DRX active time of the second terminal device.
15 . The non-transitory computer readable storage medium according to claim 11 , wherein the operations further comprise:
determining first configuration information corresponding to a sidelink, the first configuration information comprising a DRX related parameter of the sidelink; and
maintaining, based on the first configuration information, a status of a DRX corresponding to the first configuration information.