NR V2X sidelink power saving for unicast and/or groupcast
Systems, methods, and instrumentalities are described herein that may be associated with new radio (NR) vehicular communication (V2X) sidelink power saving for unicast and groupcast. A first wireless transmit/receive unit (WTRU) may receive a message. The message may indicate a set of configuration groups and/or one or more suitability selection parameters. The WTRU may receive, from a second WTRU, a first indication. The first indication may indicate that the second WTRU is associated with a first configuration group and a first priority group. The first WTRU may receive, from a third WTRU, a second indication. The second indication may indicate that the third WTRU is associated with a second configuration group and a second priority value. The first WTRU may select a configuration group from the set of configuration groups based on the first indication and the second indication.
1. A wireless transmit/receive unit (WTRU), comprising:
a processor configured to:
send a first message to a peer WTRU via a PC5-Radio Resource Control (RRC) connection, wherein the PC5-RRC connection is configured with Discontinuous Reception (DRX), and wherein the first message requests a change in configuration of the PC5-RRC connection;
receive a rejection of the request from the peer WTRU; and
subsequent to the rejection, communicate with the peer WTRU via the PC5-RRC connection using unicast sidelink communication without DRX.
2. The WTRU of claim 1 , wherein the processor is further configured to, subsequent to the rejection, perform continuous monitoring of a physical sidelink control channel PSCCH of the PC5-RRC connection.
3. The WTRU of claim 1 , wherein the first message is a sidelink PC5-RRC reconfiguration message.
4. The WTRU of claim 1 , wherein the change in configuration of the PC5-RRC connection comprises a change of DRX configuration.
5. The WTRU of claim 1 , wherein the change in configuration of the PC5-RRC connection comprises a change of timer configuration.
6. The WTRU of claim 1 , wherein the change in configuration of the PC5-RRC connection comprises a change of pattern.
7. The WTRU of claim 1 , wherein the change in configuration of the PC5-RRC connection comprises a change in activity behavior of the peer WTRU.
8. The WTRU of claim 1 , wherein the change in configuration of the PC5-RRC connection comprises a change in reception behavior of the peer WTRU.
9. The WTRU of claim 1 , wherein the rejection indicates a DRX configuration failure.
10. A method associated with a wireless transmit/receive unit (WTRU), the method comprising:
sending a first message to a peer WTRU via a PC5-Radio Resource Control (RRC) connection, wherein the PC5-RRC connection is configured with Discontinuous Reception (DRX), and wherein the first message requests a change in configuration of the PC5-RRC connection;
receiving a rejection of the request from the peer WTRU; and
subsequent to the rejection, communicating with the peer WTRU via the PC5-RRC connection using unicast sidelink communication without DRX.
11. The method of claim 10 , wherein the first message is a sidelink PC5-RRC reconfiguration message.
12. The method of claim 10 , wherein the change in configuration of the PC5-RRC connection comprises a change of DRX configuration.
13. The method of claim 10 , further comprising:
subsequent to the rejection, performing continuous monitoring of a physical sidelink control channel (PSCCH) of the PC5-RRC connection.
14. The method of claim 10 , wherein the change in configuration of the PC5-RRC connection comprises a change of timer configuration.
15. The method of claim 10 , wherein the change in configuration of the PC5-RRC connection comprises a change of pattern.
16. The method of claim 10 , wherein the change in configuration of the PC5-RRC connection comprises a change in activity behavior of the peer WTRU.
17. The method of claim 10 , wherein the change in configuration of the PC5-RRC connection comprises a change in reception behavior of the peer WTRU.
18. The method of claim 10 , wherein the rejection indicates a DRX configuration failure.