| CPC H04W 28/24 (2013.01) [H04W 24/10 (2013.01); H04W 28/0268 (2013.01); H04W 28/0273 (2013.01)] | 9 Claims | 

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               1. A method for performance measurement of SDF (service data flow), performed by SMF (Session Management Function), comprising: 
            determining performance measurement of a target QoS (Quality of Service) flow, 
                wherein downlink packet for the SDF is transmitted on the target QoS flow to a UE (user equipment); 
                including downlink QoS information on the target QoS flow in a QoS rule, based on a reflective QoS being not used for the SDF; and 
                transmitting the QoS rule to the UE. 
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