Acknowledgement codebook design for multiple transmission reception points

A method for wireless communication at a transmission reception point (TRP), comprising:

• identifying, at the TRP, a slot allocation of at least one slot to be used by a user equipment (UE) to provide hybrid automatic repeat request (HARQ) acknowledgement feedback to the TRP;
• transmitting a downlink message to the UE;
• transmitting an indication that the UE is to provide HARQ acknowledgement feedback using the at least one slot identified by the slot allocation;
• and
• receiving, from the UE and on the at least one slot identified by the slot allocation, the HARQ acknowledgement feedback pertaining to the downlink message.

An apparatus for wireless communication at a user equipment (UE), comprising:

• a processor,
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive a slot allocation for the UE to provide hybrid automatic repeat request (HARQ) acknowledgement feedback to a plurality of transmission reception points (TRPs);
• determine a TRP-specific HARQ acknowledgement codebook for feedback transmissions to a TRP of the plurality of TRPs based at least in part on the slot allocation;
• determine one or more TRP-specific uplink parameters for feedback transmissions to the TRP;
• and
• transmit feedback to the TRP using a corresponding slot identified by the slot allocation and using the TRP-specific HARQ acknowledgement codebook and the one or more TRP-specific uplink parameters.

An apparatus for wireless communication at a transmission reception point (TRP), comprising:

• a processor,
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify, at the TRP, a slot allocation of at least one slot to be used by a user equipment (UE) to provide hybrid automatic repeat request (HARQ) acknowledgement feedback to the TRP;
• transmit a downlink message to the UE;
• transmit an indication that the UE is to provide HARQ acknowledgement feedback using the at least one slot identified by the slot allocation;
• and
• receive, from the UE and on the at least one slot identified by the slot allocation, HARQ acknowledgement feedback pertaining to the downlink message.

An apparatus for wireless communication at a user equipment (UE), comprising:

• means for receiving a slot allocation for the UE to provide hybrid automatic repeat request (HARQ) acknowledgement feedback to a plurality of transmission reception points (TRPs);
• means for determining a TRP-specific HARQ acknowledgement codebook for feedback transmissions to a TRP of the plurality of TRPs based at least in part on the slot allocation;
• means for determining one or more TRP-specific uplink parameters for feedback transmissions to the TRP;
• and
• means for transmitting feedback to the TRP using a corresponding slot identified by the slot allocation and using the TRP-specific HARQ acknowledgement codebook and the one or more TRP-specific uplink parameters.

An apparatus for wireless communication at a transmission reception point (TRP), comprising:

• means for identifying, at the TRP, a slot allocation of at least one slot to be used by a user equipment (UE) to provide hybrid automatic repeat request (HARQ) acknowledgement feedback to the TRP;
• means for transmitting the slot allocation to one or more other TRPs in communication with the UE to facilitate slot allocation coordination between the TRP and the one or more other TRPs;
• means for transmitting a downlink message to the UE;
• means for transmitting an indication that the UE is to provide HARQ acknowledgement feedback using the at least one slot identified by the slot allocation;
• and
• means for receiving, from the UE and on the at least one slot identified by the slot allocation, HARQ acknowledgement feedback pertaining to the downlink message.

A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor to:

• receive a slot allocation for the UE to provide hybrid automatic repeat request (HARQ) acknowledgement feedback to a plurality of transmission reception points (TRPs);
• determine a TRP-specific HARQ acknowledgement codebook for feedback transmissions to a TRP of the plurality of TRPs based at least in part on the slot allocation;
• determine one or more TRP-specific uplink parameters for feedback transmissions to the TRP;
• and
• transmit feedback to the TRP using a corresponding slot identified by the slot allocation and using the TRP-specific HARQ acknowledgement codebook and the one or more TRP-specific uplink parameters.

A non-transitory computer-readable medium storing code for wireless communication at a transmission reception point (TRP), the code comprising instructions executable by a processor to:

• identify, at the TRP, a slot allocation of at least one slot to be used by a user equipment (UE) to provide hybrid automatic repeat request (HARQ) acknowledgement feedback to the TRP;
• transmit the slot allocation to one or more other TRPs in communication with the UE to facilitate slot allocation coordination between the TRP and the one or more other TRPs;
• transmit a downlink message to the UE;
• transmit an indication that the UE is to provide HARQ acknowledgement feedback using the at least one slot identified by the slot allocation;
• and
• receive, from the UE and on the at least one slot identified by the slot allocation, HARQ acknowledgement feedback pertaining to the downlink message.