SIDELINK DISCONTINUOUS RECEPTION MANAGEMENT FOR GROUPCAST AND BROADCAST
Apparatus, methods, and computer-readable media for sidelink discontinuous reception (DRX) management for groupcast and broadcast are disclosed herein. A transmitter user equipment (UE) may determine one or more adjustments to a sidelink DRX configuration or DRX operation based on one or more factors of the transmitter UE, and transmit, to a receiver UE over a sidelink channel, during at least a portion of a sidelink DRX active duration, a first message comprising an indication of the one or more adjustments to the sidelink DRX configuration or DRX operation. A receiver UE may receive, from a transmitter UE sent to multiple UEs over a sidelink channel, during a portion of a sidelink DRX active duration, a first message comprising an indication of one or more first adjustments to a sidelink DRX configuration or DRX operation, and determine whether to respond to the indication based on parameters of the receiver UE.
1 . A method of wireless communication performed by a receiver user equipment (UE), the method comprising:
receiving, from a transmitter UE over a sidelink channel, during at least a portion of a sidelink discontinuous reception (DRX) active duration, a first message comprising an indication of one or more first adjustments to a sidelink DRX configuration or a sidelink DRX operation, wherein the first message is included in a sidelink transmission to a plurality of UEs; and
determining whether to respond to the indication of the one or more first adjustments based on one or more parameters of the receiver UE.
2 . The method of claim 1 , further comprising:
determining whether to forward the indication of the one or more first adjustments to one or more UEs; and
transmitting, to the one or more of UEs over the sidelink channel, during the at least a portion of the sidelink DRX active duration, the indication, when the receiver UE determines to forward the indication to the one or more UEs, wherein the one or more first adjustments to the sidelink DRX configuration correspond to one or more of an adjustment to a DRX offset value, an adjustment to the at least a portion of the sidelink DRX active duration or an adjustment to a length of the sidelink DRX active duration.
3 . The method of claim 1 , wherein the first message comprises a media access control (MAC) control element (MAC CE), wherein the indication of the one or more first adjustments to the sidelink DRX configuration is included in the MAC CE.
4 . The method of claim 3 , further comprising:
determining whether data is available to multiplex with the MAC CE; and
determining to forward the indication to one or more UEs when data is available to multiplex with the MAC CE.
5 . The method of claim 4 , further comprising:
determining whether the MAC CE is to be forwarded independent of data when the data is not available to multiplex with the MAC CE; and
determining to forward the indication to one or more UEs based on a priority of the MAC CE when the MAC CE is to be forwarded independent of data.
6 . The method of claim 5 , further comprising:
determining whether the MAC CE is to be forwarded independent of data when the data is not available to multiplex with the MAC CE; and determining to forward the indication to one or more UEs based on a priority of the MAC CE when the MAC CE is to be forwarded independent of data.
7 . The method of claim 1 , wherein the first message comprises a media access control (MAC) command, wherein the indication of the one or more first adjustments to the sidelink DRX operation is included in the MAC command, wherein the one or more first adjustments to the sidelink DRX operation correspond to one or more of an adjustment to a sidelink DRX timer value or an adjustment to a sidelink DRX timer operation.
8 . The method of claim 1 , wherein the indication indicates whether the receiver UE is allowed to forward the indication to another UE over the sidelink channel, further comprising:
determining to forward the indication to one or more UEs when the indication indicates that the receiver UE is allowed to forward the indication.
9 . The method of claim 1 , wherein the indication indicates a predetermined maximum hop value, and further comprising:
determining to forward the indication to one or more UEs when a current hop value associated with the receiver UE does not exceed the predetermined maximum hop value.
10 . The method of claim 1 , wherein the indication indicates whether the one or more first adjustments to the sidelink DRX configuration are applicable to the receiver UE based on a location of the transmitter UE and a predetermined range criteria, further comprising:
determining to forward the indication to one or more UEs when a current location of the receiver UE does not exceed the predetermined range criteria.
11 . The method of claim 10 , further comprising:
determining to forward the indication to one or more UEs when a current location of the receiver UE does not exceed the predetermined range criteria.
12 . The method of claim 1 , wherein the indication indicates whether the one or more first adjustments to the sidelink DRX configuration are negotiable between the receiver UE and the transmitter UE.
13 . The method of claim 12 , further comprising:
transmitting, to the transmitter UE over the sidelink channel, a second message comprising a response indicating whether the receiver UE accepts the one or more first adjustments to the sidelink DRX configuration, when the indication indicates that the one or more first adjustments to the sidelink DRX configuration are negotiable.
14 . The method of claim 13 , wherein the response comprises a positive acknowledgment (ACK) message indicating an acceptance to adjust the sidelink DRX configuration.
15 . The method of claim 14 , further comprising:
receiving, from the transmitter UE over the sidelink channel, during the at least a portion of the sidelink DRX active duration, an indication that the transmitter UE intends to activate the one or more first adjustments to the sidelink DRX configuration when the response includes the positive ACK message.
16 . The method of claim 13 , wherein the response comprises a negative acknowledgment (NACK) message indicating that the transmitter UE does not accept the one or more first adjustments to the sidelink DRX configuration.
17 . An apparatus for wireless communication at a receiver user equipment (UE), the apparatus comprising:
a memory;
a transceiver; and
at least one processor communicatively coupled to the memory and the transceiver, the at least one processor configured to:
receive, from a transmitter UE over a sidelink channel, during at least a portion of a sidelink discontinuous reception (DRX) active duration, via the transceiver, a first message comprising an indication of one or more first adjustments to a sidelink DRX configuration or a sidelink DRX operation, wherein the first message is included in a sidelink transmission to a plurality of UEs; and
determine whether to respond to the indication of the one or more first adjustments based on one or more parameters of the receiver UE.
18 . The apparatus of claim 17 , wherein the first message comprises a media access control (MAC) control element (MAC CE), wherein the indication of the one or more first adjustments to the sidelink DRX configuration is included in the MAC CE, wherein the one or more first adjustments to the sidelink DRX configuration correspond to one or more of an adjustment to a DRX offset value, an adjustment to the at least a portion of the sidelink DRX active duration or an adjustment to a length of the sidelink DRX active duration.
19 . The apparatus of claim 17 , wherein the first message comprises a media access control (MAC) command, wherein the indication of the one or more first adjustments to the sidelink DRX operation is included in the MAC command, wherein the one or more first adjustments to the sidelink DRX operation correspond to one or more of an adjustment to a sidelink DRX timer value or an adjustment to a sidelink DRX timer operation.
20 . A non-transitory computer-readable medium comprising instructions that, when executed by a receiver user equipment (UE), cause the receiver UE to perform operations, comprising:
receiving, from a transmitter UE over a sidelink channel, during at least a portion of a sidelink discontinuous reception (DRX) active duration, a first message comprising an indication of one or more first adjustments to a sidelink DRX configuration or a sidelink DRX operation, wherein the first message is included in a sidelink transmission to a plurality of UEs; and
determining whether to respond to the indication of the one or more first adjustments based on one or more parameters of the receiver UE.