METHOD AND APPARATUS FOR ADAPTIVE CONTROL OF CONTENTION WINDOW IN LAA

摘要

A method for listen-before-talk (LBT) operation by an eNodeB (eNB) in a wireless communication network. The method comprises triggering an LBT request to transmit, to a user equipment (UE), at least one of an uplink (UL) grant or downlink (DL) data for UL transmission over an licensed assisted access (LAA), determining an adaptive contention window (CW) size comprising a predetermined minimum value and maximum value for transmitting the DL data and UL grant, performing DL data and UL grant LBT operations in accordance with the adaptive CW size, performing a UL grant LBT operation to transmit a UL grant message to the UE, wherein the UL grant LBT comprises a higher priority than the DL data regardless of a level of QoS of the DL data, multiplexing the UL grant with the DL data, and transmitting the multiplexed UL grant with the DL data transmission to the UE.