Enhanced physical uplink control channel spatial relation information in MAC CE

A method of wireless communication performed by a user equipment (UE), comprising:

• receiving a medium access control (MAC) command element (CE) indicating an update to a spatial relation configuration of the UE for physical uplink control channel (PUCCH) transmissions, the update indicated by group PUCCH resource information that includes:
• a plurality of PUCCH resources, and
• a plurality of bitmaps, each bitmap including a respective plurality of candidate spatial relation configurations, wherein each bitmap identifies a respective value corresponding to a particular spatial relation configuration of the respective plurality of candidate spatial relation configurations, and wherein the particular spatial relation configuration includes spatial settings and power control parameters for transmission on a respective PUCCH resource of the plurality of PUCCH resources;
• updating the spatial relation configuration of the UE in accordance with the group PUCCH resource information;
• and
• transmitting a PUCCH transmission using the spatial relation configuration;
• and wherein:
• each bitmap includes a first bit corresponding to the particular spatial relation configuration,
• the first bit is set to a first value,
• the bitmap includes a plurality of second bits corresponding to other candidate spatial relation configurations of the respective plurality of candidate spatial relation configurations, and
• the plurality of second bits are set to a second value different from the first value.

A method of wireless communication performed by a base station, comprising:

• generating a medium access control (MAC) command element (CE) indicating an update to a spatial relation configuration of a user equipment (UE) for physical uplink control channel (PUCCH) transmissions, the update indicated by PUCCH resource information that includes:
• a PUCCH resource identifier that identifies a PUCCH resource, and
• a bitmap including a plurality of candidate spatial relation configurations, wherein the bitmap identifies a value corresponding to a particular spatial relation configuration of the plurality of candidate spatial relation configurations, and wherein the particular spatial relation configuration includes spatial settings and power control parameters for transmission on the PUCCH resource;
• and
• transmitting the MAC CE to the UE to update the spatial relation configuration of the UE for PUCCH transmissions;
• and
• wherein:
• the bitmap includes a first bit corresponding to the particular spatial relation configuration,
• the first bit is set to a first value,
• the bitmap includes a plurality of second bits corresponding to other candidate spatial relation configurations of the plurality of candidate spatial relation configurations, and
• the plurality of second bits are set to a second value different from the first value.

A user equipment (UE) for wireless communication, comprising:

• memory;
• and
• one or more processors operatively coupled to the memory, the one or more processors configured to:
• receive a medium access control (MAC) command element (CE) indicating an update to a spatial relation configuration of the UE for physical uplink control channel (PUCCH) transmissions, the update indicated by PUCCH resource information that includes:
• a PUCCH resource identifier that identifies a PUCCH resource, and
• a bitmap including a plurality of candidate spatial relation configurations, wherein the bitmap identifies a value corresponding to a particular spatial relation configuration of the plurality of candidate spatial relation configurations, and wherein the particular spatial relation configuration includes spatial settings and power control parameters for transmission on the PUCCH resource;
• update the spatial relation configuration of the UE in accordance with the PUCCH resource information;
• and
• transmit a PUCCH transmission using the spatial relation configuration;
• and
• wherein:
• the bitmap includes a first bit corresponding to the particular spatial relation configuration,
• the first bit is set to a first value,
• the bitmap includes a plurality of second bits corresponding to other candidate spatial relation configurations of the plurality of candidate spatial relation configurations, and
• the plurality of second bits are set to a second value different from the first value.