Multi-channel downlink scheduling with miss detection based on variable bitwidth index

An apparatus for wireless communication at a base station, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• generate a plurality of downlink control information messages (DCIs), the DCIs identifying respective physical downlink shared channel (PDSCH) resources for a user equipment (UE), a first DCI of the plurality of DCIs having a first format usable to identify PDSCH resources for multiple PDSCHs, a number of bits for a downlink assignment index for a second DCI of the plurality of DCIs being based on a second format of the second DCI, based on a carrier for the second DCI, or based on the first DCI having the first format;
• and
• transmit the plurality of DCIs to the UE.

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

• receiving a plurality of downlink control information messages (DCIs) from a base station, the DCIs identifying physical downlink shared channel (PDSCH) resources for the UE;
• determining a number of downlink assignment index bits of a first DCI of the plurality of DCIs based on a first format of the first DCI, based on a carrier for the first DCI, or based on a DCI of the plurality of DCIs having a second format, the second format being a format that can identify PDSCH resources for multiple PDSCHs;
• and
• determining that the base station transmitted a second DCI to the UE that the UE did not receive based on the first DCI and the determined number of DAI bits for the first DCI;
• transmitting a NACK based on determining that the UE did not receive the second DCI.

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

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• receive a plurality of downlink control information messages (DCIs) from a base station, the DCIs identifying physical downlink shared channel (PDSCH) resources for the UE;
• determine a number of downlink assignment index bits of a first DCI of the plurality of DCIs based on a first format of the first DCI, based on a carrier for the first DCI, or based on a DCI of the plurality of DCIs having a second format, the second format being a format that can identify PDSCH resources for multiple PDSCHs;
• and
• determine that the base station transmitted a second DCI to the UE that the UE did not receive based on the first DCI and the determined number of DAI bits for the first DCI;
• transmit a NACK based on the determination that the UE did not receive the second DCI.