Techniques for radio access and sidelink discontinuous reception alignment
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit, to a second UE associated with a sidelink connection with the first UE, assistance information indicating at least part of a first discontinuous reception (DRX) configuration for a radio access link between the first UE and a base station. The UE may receive at least part of a sidelink DRX configuration for the sidelink connection, wherein an on duration of the sidelink DRX configuration is not aligned with an on duration of the first DRX configuration. The UE may transmit information indicating at least part of the sidelink DRX configuration. The UE may receive, from the base station, a second DRX configuration for the radio access link. The UE may communicate in accordance with the sidelink DRX configuration or the second DRX configuration. Numerous other aspects are described.
1. A first user equipment (UE) for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
receive, from a network node, a first discontinuous reception (DRX) configuration for a radio access link between the first UE and the network node;
receive, from a second UE associated with a sidelink connection with the first UE, at least part of a sidelink DRX configuration for the sidelink connection;
transmit, to the network node, information indicating at least part of the sidelink DRX configuration; and
communicate in accordance with the sidelink DRX configuration or the first DRX configuration.
2. The first UE of claim 1 , wherein the one or more processors are further configured to transmit, to the second UE, assistance information.
3. The first UE of claim 2 , wherein the assistance information indicates at least part of the first DRX configuration for the radio access link between the first UE and the network node.
4. The first UE of claim 3 , wherein the assistance information is provided via a radio resource control (RRC) message.
5. The first UE of claim 3 , wherein the assistance information is provided via a medium access control (MAC) message.
6. The first UE of claim 3 , wherein the assistance information includes at least one of:
information indicating a preferred sidelink DRX configuration, or
information indicating a sidelink DRX configuration between the first UE and another UE other than the second UE.
7. The first UE of claim 1 , wherein the one or more processors are further configured to receive, from the network node, a second DRX configuration for the radio access link, wherein the second DRX configuration has one or more parameters that are modified relative to the first DRX configuration including at least one of:
a DRX slot offset,
a DRX start offset,
a DRX short cycle, or
a DRX long cycle start offset.
8. The first UE of claim 7 , wherein the second DRX configuration is received via a radio resource control (RRC) message.
9. The first UE of claim 8 , wherein the RRC message includes an entirety of the second DRX configuration.
10. The first UE of claim 8 , wherein the RRC message includes a subset of the second DRX configuration.
11. The first UE of claim 7 , wherein an on duration of the second DRX configuration is aligned with an on duration of the sidelink DRX configuration.
12. The first UE of claim 1 , wherein the sidelink DRX configuration is based at least in part on the first DRX configuration.
13. The first UE of claim 12 , wherein an on duration of the sidelink DRX configuration is aligned with an on duration of the first DRX configuration.
14. The first UE of claim 1 , wherein the at least part of the sidelink DRX configuration is received via a radio resource control (RRC) message.
15. The first UE of claim 14 , wherein the RRC message includes an entirety of the sidelink DRX configuration.
16. The first UE of claim 14 , wherein the RRC message includes a subset of the sidelink DRX configuration.
17. The first UE of claim 1 , wherein the at least part of the sidelink DRX configuration indicates, via physical layer signaling, a selected parameter from a set of configured parameters for the sidelink DRX configuration.
18. A method of wireless communication performed by a first user equipment (UE), comprising:
receiving, from a network node, a first discontinuous reception (DRX) configuration for a radio access link between the first UE and the network node;
receiving, from a second UE associated with a sidelink connection with the first UE, at least part of a sidelink DRX configuration for the sidelink connection;
transmitting, to the network node, information indicating at least part of the sidelink DRX configuration; and
communicating in accordance with the sidelink DRX configuration or the first DRX configuration.
19. The method of claim 18 , further comprising transmitting, to the second UE associated with a sidelink connection with the first UE, assistance information.
20. The method of claim 19 , wherein the assistance information indicates at least part of the first DRX configuration for the radio access link between the first UE and the network node.
21. The method of claim 20 , wherein the assistance information is provided via a radio resource control (RRC) message.
22. The method of claim 20 , wherein the assistance information is provided via a medium access control (MAC) message.
23. The method of claim 20 , wherein the assistance information includes at least one of:
information indicating a preferred sidelink DRX configuration, or
information indicating a sidelink DRX configuration between the first UE and another UE other than the second UE.
24. The method of claim 18 , further comprising receiving, from the network node, a second DRX configuration for the radio access link, wherein the second DRX configuration has one or more parameters that are modified relative to the first DRX configuration including at least one of:
a DRX slot offset,
a DRX start offset,
a DRX short cycle, or
a DRX long cycle start offset.
25. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:
one or more instructions that, when executed by one or more processors of a first user equipment (UE), cause the UE to:
receive, from a network node, a first discontinuous reception (DRX) configuration for a radio access link between the first UE and the network node;
receive, from a second UE associated with a sidelink connection with the first UE, at least part of a sidelink DRX configuration for the sidelink connection;
transmit, to the network node, information indicating at least part of the sidelink DRX configuration; and
communicate in accordance with the sidelink DRX configuration or the first DRX configuration.
26. The non-transitory computer-readable medium of claim 25 , wherein the one or more instructions further cause the UE to transmit, to a second UE associated with a sidelink connection with the first UE, assistance information.
27. The non-transitory computer-readable medium of claim 26 , wherein the assistance information indicates at least part of the first DRX configuration for the radio access link between the first UE and the network node.
28. An apparatus for wireless communication, comprising:
means for receiving, from a network node, a first discontinuous reception (DRX) configuration for a radio access link between the apparatus and the network node;
means for receiving, from a second user equipment (UE) associated with a sidelink connection with the apparatus, at least part of a sidelink DRX configuration for the sidelink connection;
means for transmitting, to the network node, information indicating at least part of the sidelink DRX configuration; and
means for communicating in accordance with the sidelink DRX configuration or the first DRX configuration.
29. The apparatus of claim 28 , further comprising means for transmitting, to a second UE associated with a sidelink connection with the apparatus, assistance information.
30. The apparatus of claim 29 , wherein the assistance information indicates at least part of the first DRX configuration for the radio access link between the apparatus and the network node.