Method and apparatus for channel usage in unlicensed spectrum considering beamformed transmission in a wireless communication system
摘要
說明書
Regardless of which case occurs, the beam(s), which is (or are) using the unlicensed spectrum, channel, or band, should have the same occupancy time to avoid possible waste of channel utilization. Some solutions are discussed below.
Network or one TRP or gNB transmits a control signal to indicate information of ending scheduling time unit or TTI (such as ending subframe, slot, or symbol) of the TRP by the content of the control signal. A UE monitors or receives the control signal and derives information of a scheduling time unit or TTI from the control signal, wherein the information comprises transmission direction of symbol or functionality of symbol in the scheduling time unit or TTI. The UE considers the scheduling time unit or TTI as ending scheduling time unit or TTI. The UE performs DL reception or UL transmission before or within the ending scheduling time unit or TTI. In one embodiment, the UE could perform DL reception or UL transmission for a reference signal or a channel before or within the ending scheduling time unit or TTI. The UE could perform DL data reception or UL data transmission before and/or within the ending scheduling time unit or TTI until a next channel occupancy. However, the UE does not perform DL data reception or UL data transmission after the ending scheduling time unit or TTI until a next channel occupancy. In one embodiment, the next channel occupancy may be occupied or obtained by the UE or the network.
