Indicating a number of empty transmission occasions of a group of semi-persistent transmission occasions

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

• a processor;
• a memory coupled with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• receive, from a base station, downlink control information (DCI) indicating both a semi-persistent schedule for a plurality of physical downlink shared channel (PDSCH) occasions within a transmission window and a first quantity of a first group of empty PDSCH occasions, the plurality of PDSCH occasions comprising the first group of empty PDSCH occasions and a second group of non-empty PDSCH occasions;
• receive, from the base station, a plurality of downlink data transmissions within the transmission window based on the semi-persistent schedule, each downlink data transmission of the plurality of downlink data transmissions being received in a respective non-empty PDSCH occasion of the second group of non-empty PDSCH occasions;
• transmit, to the base station after the transmission window, a feedback message indicating a second quantity of either a first group of negative acknowledgements (NACKs) associated with the first group of empty PDSCH occasions or a second group of NACKs associated with the second group of non-empty PDSCH occasions based on a total quantity of both the first group of NACKs and the second group of NACKs being greater than the first quantity;
• and
• transmit, to the base station after the transmission window, each NACK of one or both of the first group of NACKs or the second group of NACKs.

A method for wireless communication by a first wireless device, comprising:

• receiving, from a second wireless device, a transmission configuration message configuring a plurality of transmission occasions from the first wireless device to the second wireless device within a transmission window;
• transmitting, to the second wireless device, a transmission occasion message indicating a first quantity of a first group of empty transmission occasions of the plurality of transmission occasions, the plurality of transmission occasions comprising the first group of empty transmission occasions and a second group of non-empty transmission occasions;
• transmitting, to the second wireless device, a plurality of transmissions within the transmission window, each transmission of the plurality of transmissions being transmitted in a respective non-empty transmission occasion of the second group of non-empty transmission occasions;
• and
• receiving, from the second wireless device after the transmission window, a feedback message indicating a second quantity of either a first group of negative acknowledgements (NACKs) associated with the first group of empty physical downlink shared channel (PDSCH) occasions or a second group of NACKs associated with the second group of non-empty PDSCH occasions based on a total quantity of both the first group of NACKs and the second group of NACKs being greater than the first quantity;
• receiving, from the second wireless device, each NACK of one or both of the first group of NACKs or the second group of NACKs.

An apparatus for wireless communications at a first wireless device, comprising:

• a processor;
• a memory coupled with the processor;
• and
• instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:
• receive, from a second wireless device, a transmission configuration message configuring a plurality of transmission occasions from the first wireless device to the second wireless device within a transmission window;
• transmit, to the second wireless device, a transmission occasion message indicating a first quantity of a first group of empty transmission occasions of the plurality of transmission occasions, the plurality of transmission occasions comprising the first group of empty transmission occasions and a second group of non-empty transmission occasions;
• transmit, to the second wireless device, a plurality of transmissions within the transmission window, each transmission of the plurality of transmissions being transmitted in a respective non-empty transmission occasion of the second group of non-empty transmission occasions;
• and
• receive, from the second wireless device after the transmission window, a feedback message indicating a second quantity of either a first group of negative acknowledgements (NACKs) associated with the first group of empty physical downlink shared channel (PDSCH) occasions or a second group of NACKs associated with the second group of non-empty PDSCH occasions based on a total quantity of both the first group of NACKs and the second group of NACKs being greater than the first quantity;
• receive, from the second wireless device, each NACK of one or both of the first group of NACKs or the second group of NACKs.