Power control indication in groupcast sidelink communications

A method for wireless communication at a transmitting user equipment (UE), comprising:

• identifying a plurality of different sets of sidelink wireless resources for providing transmit power control indications from a group of receiving UEs to the transmitting UE, each set of sidelink wireless resources associated with a different receiving UE of the group of receiving UEs that receive device-to-device sidelink groupcast transmissions of the transmitting UE, wherein the transmit power control indications are provided responsive to a physical sidelink shared channel transmission being received from the transmitting UE;
• monitoring the plurality of different sets of sidelink wireless resources for one or more transmit power control indications from one or more of the group of receiving UEs;
• determining a transmission power adjustment for the groupcast transmissions based at least in part on the one or more transmit power control indications;
• and
• transmitting the groupcast transmissions at a transmission power that is based at least in part on the transmission power adjustment.

An apparatus for wireless communication at a first user equipment (UE), comprising:

• a processor,
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify a first set of sidelink wireless resources for transmission of a first transmit power control indication from the first UE to a transmitter of a device-to-device sidelink communication, wherein the device-to-device sidelink communication is to a group of UEs that includes the first UE, and wherein the first set of sidelink wireless resources includes different resources than other sets of sidelink wireless resources of other UEs of the group of UEs to provide associated transmit power control indications to the transmitter;
• determine the first transmit power control indication based at least in part on a measured signal strength of the device-to-device sidelink communication from the transmitter, wherein determining the first transmit power control indication is performed responsive to a physical sidelink shared channel transmission being received from the transmitter;
• and
• transmit the first transmit power control indication to the transmitter via the first set of sidelink wireless resources.

An apparatus for wireless communication at a transmitting user equipment (UE), comprising:

• a processor,
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify a plurality of different sets of sidelink wireless resources for providing transmit power control indications from a group of receiving UEs to the transmitting UE, each set of wireless resources associated with a different receiving UE of the group of receiving UEs that receive device-to-device sidelink groupcast transmissions of the transmitting UE, wherein the transmit power control indications are provided responsive to a physical sidelink shared channel transmission being received from the transmitting UE;
• monitor the plurality of different sets of sidelink wireless resources for one or more transmit power control indications from one or more of the group of receiving UEs;
• determine a transmission power adjustment for the groupcast transmissions based at least in part on the one or more transmit power control indications;
• and
• transmit the groupcast transmissions at a transmission power that is based at least in part on the transmission power adjustment.