| CPC H04W 28/0268 (2013.01) | 19 Claims | 

| 
               1. A method performed by a first user equipment (UE), the method comprising: 
            transmitting at least one quality of service (QOS) flow to a second UE; 
                receiving, from the second UE, a feedback report of at least one QoS parameter for the at least one QoS flow, wherein the feedback report comprises: 
                an identity of the second UE; 
                  a QoS flow identity for the QoS flow; and 
                  a monitored result of the at least one QoS parameter; 
                transmitting the feedback report to a base station; and 
                receiving, from the base station, an indication to transmit a notification for QoS flow modification to an application layer of the first UE. 
               |