Description  Claims  Drawing  Cited references 

3rd Generation Partnership Project; Technical Specification Group Core Network and Terminals; 5G System; Policy and Charging Control signalling flows and QoS parameter mapping; Stage 3 (Release 15)   [0005] 
3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; System Architecture for the SG System; Stage 2 (Release 15)   [0006]