Patent ID: 11864229
Assignee: APPLE INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An apparatus comprising:
at least one processor configured to cause a user equipment (UE) to:
transmit one or more physical uplink shared channel (PUSCH) transmissions to a base station in an unlicensed spectrum in a reference burst, wherein the one or more PUSCH transmissions include transport blocks (TBs) comprised of a plurality of code block groups (CBGs);
determine Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information for the plurality of CBGs in the reference burst, wherein determining incudes counting negative ACKs (NACKs) or ACKs from each CBG of the plurality of CBGs individually for each of the transport blocks, and when an uplink grant does not indicate a toggled new data indicator (NI) for a HARQ process, a value of “1” in a code block group transmit information corresponds to a NACK;

determine whether the HARQ-ACK information for the at least one CBG meets a predetermined number of NACKs;
use an adjusted contention window (CW) size for a listen-before talk (LBT) procedure for uplink communications with the base station in the unlicensed spectrum, the adjusted CW size based on the HARQ-ACK information.