Listen-before-talk in uplink multiuser MIMO systems

摘要

Systems and methods are disclosed herein that relate to a mechanism at a radio access node(s) and a User Equipment (UE) that enable the UE to decide whether the UE can use a wireless channel for data transmission even when the UE senses the wireless channel as being busy during a listening phase of a Listen-Before-Talk (LBT) procedure. In some embodiments, the method of operation of the UE comprises performing a LBT procedure for an observed channel where a result of the LBT procedure being that the observed channel is busy and deciding to override the LBT procedure based on knowledge that the observed channel is busy due to transmission by a compatible UE and transmitting on the observed channel even though the result of the LBT procedure is that the observed channel is busy upon deciding to override the LBT procedure.