Patent ID: 10952230

Abstract:
A method and apparatus are disclosed from the perspective of a first User Equipment (UE) to support PC5 QoS flow to SL-DRB (Sidelink-Data Radio Bearer) remapping. In one embodiment, the method includes the first UE establishing a sidelink communication with a second UE. The method further includes the first UE mapping a PC5 QoS flow of the sidelink communication to a first SL-DRB. The method also includes the first UE transmitting a PC5 RRC (Radio Resource Control) message to the second UE, wherein the PC5 RRC message indicates the PC5 QoS flow is mapped to a second SL-DRB. In addition, the method includes the first UE transmitting an end-marker control PDU (Protocol Data Unit) to the second UE after successful transmission of the PC5 RRC message has been confirmed by lower layer(s) or after receiving a PC5 RRC complete message corresponding to the PC5 RRC message from the second UE.