PROCEDURE AND PREPARATION FOR THE ADAPTATION OF THE SIZE OF A COMPETITION FENCE OF UNLIMITED NEWS

摘要

A method of a base station (BS) in a wireless communication system is provide. The method comprises: receiving, from at least one user equipment (UE) via an uplink channel, a set of hybrid automatic repeat request-acknowledge/negative acknowledge (HARQ-ACK/NACK) responses corresponding to downlink transmissions transmitted to the at least one UE; determining a set of time and frequency domain resources that contains non-broadcast physical downlink shared channel (PDSCH) transmissions on a downlink transmission burst that is previously transmitted to the at least one UE; adjusting a contention window size (CWS) based on a subset of the set of HARQ-ACK/NACK responses, the subset of HARQ-ACK/NACK responses corresponding to the unicast PDSCH transmissions on the determined set of time and frequency domain resources; performing a listen-before-talk (LBT) operation with a configurable sensing duration based on the adjusted CWS; and transmitting via a downlink channel a downlink transmission based on the LBT operation.