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 transmitter user equipment (UE), the method comprising:
determining one or more first adjustments to a sidelink discontinuous reception (DRX) configuration or a sidelink DRX operation for a groupcast or broadcast based on one or more parameters associated with the transmitter UE as measured by the transmitter UE; and
transmitting, to a receiver UE over a sidelink channel via a broadcast transmission or groupcast transmission, during at least a portion of a sidelink DRX active duration, a first message comprising a media access control (MAC) control element (MAC CE) including an indication of whether the one or more first adjustments for the groupcast or the broadcast are applicable to the receiver UE based on a location of the transmitter UE and a predetermined range.
2 . The method of claim 1 , wherein the one or more first adjustments to the sidelink DRX configuration corresponds 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) command, wherein the indication of the one or more first adjustments to the sidelink DRX operation is included in the MAC command.
4 . The method of claim 1 , 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.
5 . The method of claim 1 , wherein the indication indicates whether the one or more first adjustments are negotiable between the transmitter UE and the receiver UE.
6 . The method of claim 1 , wherein the indication indicates whether the receiver UE is allowed to forward the indication to another UE over a second sidelink channel.
7 . The method of claim 1 , further comprising:
receiving, from the receiver UE over the sidelink channel, a second message comprising a response indicating whether the receiver UE accepts the one or more first adjustments.
8 . The method of claim 7 , wherein the response comprises a positive acknowledgment (ACK) message indicating an acceptance to the one or more first adjustments, further comprising:
transmitting, to the receiver 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 when the response includes the positive ACK message.
9 . The method of claim 7 , wherein the response comprises a negative acknowledgment (NACK) message indicating that the receiver UE does not accept the one or more first adjustments.
10 . The method of claim 7 , wherein the response comprises a media access control (MAC) control element (MAC CE) that includes content indicating a rejection of the one or more first adjustments including an explanation for the rejection and an indication of one or more preferences of the receiver UE.
11 . The method of claim 10 , further comprising:
determining one or more second adjustments to the sidelink DRX configuration or the sidelink DRX operation based on the one or more preferences of the receiver UE;
transmitting, to the receiver UE over the sidelink channel, during the at least a portion of the sidelink DRX active duration, a third message comprising an indication of the one or more second adjustments;
receiving, from the receiver UE over the sidelink channel, a fourth message comprising a response indicating whether the receiver UE accepts the one or more second adjustments; and
transmitting, to the receiver 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 confirm the one or more second adjustments.
12 . The method of claim 10 , wherein the at least a portion of the sidelink DRX active duration comprises an on duration period.
13 . The method of claim 12 , wherein the transmitting the first message comprises transmitting a single instance of the MAC CE at a particular time within the on duration period.
14 . The method of claim 12 , wherein the transmitting the first message comprises transmitting a plurality of repetitions of the MAC CE at respective times within the on duration period.
15 . An apparatus for wireless communication at a transmitter 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:
determine one or more adjustments to a sidelink discontinuous reception (DRX) configuration or a sidelink DRX operation for a groupcast or broadcast based on one or more factors of the transmitter UE as measured by the transmitter UE; and
transmit, to a receiver UE over a sidelink channel via a broadcast transmission or groupcast transmission, during at least a portion of a sidelink DRX active duration, via the transceiver, a first message comprising a media access control (MAC) control element (MAC CE) including an indication of whether the one or more adjustments for the groupcast or the broadcast are applicable to the receiver UE based on a location of the transmitter UE and a predetermined range.
16 . The apparatus of claim 15 , 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.
17 . The apparatus of claim 15 , 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.