Sounding reference signal resource indicator signaling for spatial division multiplexing communications

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

• receiving, from a base station, configuration information associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, wherein the first SRS resource set includes a first quantity of SRS resources and the second SRS resource set includes a second quantity of SRS resources;
• and
• receiving, from the base station, downlink control information (DCI) scheduling a spatial division multiplexing physical uplink shared channel (PUSCH) communication associated with a first one or more layers and a second one or more layers, wherein the DCI indicates a first one or more SRS resources associated with the first one or more layers and a second one or more SRS resources associated with the second one or more layers from at least one of the first SRS resource set or the second SRS resource set based at least in part on at least one of:
• a dynamic switching indicator included in the DCI, a first SRS resource indicator (SRI) included in the DCI, a second SRI included in the DCI, the first quantity of SRS resources, the second quantity of SRS resources, or a maximum rank associated with the spatial division multiplexing PUSCH communication.

A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:

• one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
• receive, from a base station, configuration information associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, wherein the first SRS resource set includes a first quantity of SRS resources and the second SRS resource set includes a second quantity of SRS resources;
• and
• receive, from the base station, downlink control information (DCI) scheduling a spatial division multiplexing physical uplink shared channel (PUSCH) communication associated with a first one or more layers and a second one or more layers, wherein the DCI indicates a first one or more SRS resources associated with the first one or more layers and a second one or more SRS resources associated with the second one or more layers from at least one of the first SRS resource set or the second SRS resource set based at least in part on at least one of:
• a dynamic switching indicator included in the DCI, a first SRS resource indicator (SRI) included in the DCI, a second SRI included in the DCI, the first quantity of SRS resources, the second quantity of SRS resources, or a maximum rank associated with the spatial division multiplexing PUSCH communication.

An apparatus for wireless communication, comprising:

• means for receiving, from a base station, configuration information associated with a first sounding reference signal (SRS) resource set and a second SRS resource set, wherein the first SRS resource set includes a first quantity of SRS resources and the second SRS resource set includes a second quantity of SRS resources;
• and
• means for receiving, from the base station, downlink control information (DCI) scheduling a spatial division multiplexing physical uplink shared channel (PUSCH) communication associated with a first one or more layers and a second one or more layers, wherein the DCI indicates a first one or more SRS resources associated with the first one or more layers and a second one or more SRS resources associated with the second one or more layers from at least one of the first SRS resource set or the second SRS resource set based at least in part on at least one of:
• a dynamic switching indicator included in the DCI, a first SRS resource indicator (SRI) included in the DCI, a second SRI included in the DCI, the first quantity of SRS resources, the second quantity of SRS resources, or a maximum rank associated with the spatial division multiplexing PUSCH communication.