Joint SRI and configuration information for UE

A radio access network (RAN) node comprising:

• a memory storing computer readable instructions;
• and
• processing circuitry configured to execute the computer readable instructions to cause the node to:
• provide simultaneous uplink (UL) transmission configuration information to a user equipment (UE) device, the simultaneous UL transmission information including at least a first sounding reference signal (SRS) resource set and a second SRS resource set;
• receive SRS from the UE according to the simultaneous UL transmission configuration information;
• select a joint SRS indicator (SRI) from the simultaneous UL transmission configuration information based on the received SRS;
• transmit the selected joint SRI to the UE device;
• and
• transmit a second joint SRI to the UE device that corresponds to a NULL entry in either the first SRS resource set or the second SRS resource set for single-shot UL transmission and to valid entries in the first SRS resource set and the second SRS resource set for multi-UL transmission, the second joint SRI being different than the joint SRI in response to a selected UL transmission mode being a spatial-domain multiplexed (SDM) multi-UL transmission mode.

A method of operating a user equipment (UE) device, the method comprising:

• determining simultaneous uplink (UL) transmission configuration information, the simultaneous UL transmission information including at least a first sounding reference signal (SRS) resource set and a second SRS resource set;
• transmitting SRS according to the simultaneous UL transmission configuration information;
• receiving a joint SRS indicator (SRI) from a serving RAN node;
• and
• performing at least one UL transmission based on the joint SRI and the simultaneous UL transmission configuration information;
• and
• receiving a second joint SRI that corresponds to a NULL entry in either the first SRS resource set or the second SRS resource set for single-shot UL transmission and to valid entries in the first SRS resource set and the second SRS resource set for multi-UL transmission, the second joint SRI being different than the joint SRI in response to a selected UL transmission mode being a spatial-domain multiplexed (SDM) multi-UL transmission mode.