Systems, methods, and devices for pusch default beam in multi-panel operation

An apparatus for a user equipment (UE) configured for multiple beam operation and including multiple antenna panels, the apparatus comprising:

• a memory interface to send or receive, to or from a memory device, downlink control information (DCI);
• and
• a processor to:
• process reference signals received through the multiple antenna panels from multiple transmission reception points (TRPs) in a wireless network;
• process a physical downlink control channel (PDCCH) to determine the DCI configured to schedule a physical uplink shared channel (PUSCH);
• in response to a DCI format of the DCI being DCI format 0_0, determine a default spatial relation of the PUSCH corresponding to a selected physical uplink control channel (PUCCH) resource configured for at least one of a same antenna panel of the multiple antenna panels that receives the PDCCH with the DCI and a same scheduling TRP of the multiple TRPs that transmits the PDCCH with the DCI;
• and
• generate the PUSCH to transmit according to the default spatial relation.

A non-transitory computer-readable storage medium, the computer-readable storage medium including instructions that when executed by a processor of a user equipment (UE) configured for single transmission reception point (TRP) and multiple antenna panel operation in a wireless network, cause the processor to:

• process a physical downlink control channel (PDCCH) from a TRP to determine downlink control information (DCI) configured to schedule a physical uplink shared channel (PUSCH);
• in response to a DCI format of the DCI being DCI format 0_0, select a particular antenna panel from a plurality of antenna panels;
• determine a default spatial relation of the PUSCH corresponding to a selected physical uplink control channel (PUCCH) resource corresponding to the particular antenna panel;
• and
• generate the PUSCH to transmit according to the default spatial relation.