Methods and apparatus related to ACK/NACK feedback with multi-TRP transmissions

A base station of a cell including a plurality of transmission reception points (TRPs), comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• send, to a user equipment (UE), information indicating physical downlink control channel (PDCCH) monitoring occasions for the plurality of TRPs;
• send, to the UE, information indicating whether feedback across the plurality of TRPs is allowed;
• send, to the UE, an indication whether the feedback is for:
• transport blocks associated with the PDCCH monitoring occasions, or
• code block groups of the transport blocks;
• and
• receive the feedback across the plurality of TRPs, in response to data transmissions to the UE, wherein a codebook size of the feedback across the plurality of TRPs is based on the PDCCH monitoring occasions, wherein the feedback is associated with a plurality of DCIs sent by the plurality of TRPs.

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

• receiving information indicating physical downlink control channel (PDCCH) monitoring
• occasions for a plurality of transmission reception points (TRPs);
• receiving information indicating whether feedback across the plurality of TRPs is allowed;
• receiving an indication whether the feedback is for:
• transport blocks associated with the PDCCH monitoring occasions, or
• code block groups of the transport blocks;
• receiving a plurality of DCIs from the plurality of TRPs;
• and
• determining a codebook size of the feedback across the plurality of TRPs, associated with the plurality of DCIs, based on the PDCCH monitoring occasions.

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

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• receive information indicating physical downlink control channel (PDCCH) monitoring occasions for a plurality of transmission reception points (TRPs);
• receive information indicating whether feedback across the plurality of TRPs is allowed;
• receive an indication whether the feedback is for:
• transport blocks associated with the PDCCH monitoring occasions, or
• code block groups of the transport blocks;
• receive a plurality of DCIs from the plurality of TRPs;
• and
• determine a codebook size of the feedback across the plurality of TRPs, associated with the plurality of DCIs, based on the PDCCH monitoring occasions.