1 Scope
2 References
3 Definitions
3.1 Terms defined elsewhere
3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Conventions
6 Overview
7 Modularized UPF architecture
8 Signalling flow
8.1 UPF service registration
8.2 UPF service update
8.3 UPF service deregistration
8.4 UPF service discovery
8.5 UPF node transmission path set-up
8.6 UPF node transmission path update
8.7 UPF node transmission path release
8.8 Session establishment
8.9 Session update
8.10 Session release
8.11 Local area network tunnel set-up between UPFs
8.12 UPF event exposure
8.13 Customized UPF service registration
8.14 Customized UPF service deregistration
8.15 DAF subscription to periodic UPF information
8.16 DAF unsubscription to UPF information
8.17 DAF request for the UPF information
8.18 UPF information notification
8.19 Network management triggered UPF energy saving
9 Message format
9.1 UPF service registration
9.2 UPF service update
9.3 UPF service deregistration
9.4 UPF service discovery
9.5 UPF node transmission path set-up
9.6 UPF node transmission path update
9.7 UPF node transmission path release
9.8 Session establishment
9.9 Session update
9.10 Session release
9.11 Local area network tunnel set-up between UPFs
9.12 UPF event exposure
9.13 Customized UPF service registration
9.14 Customized UPF service deregistration
9.15 DAF subscription to periodic UPF information
9.16 DAF unsubscription to UPF information
9.17 DAF request for UPF information
9.18 UPF information notification
9.19 Network management triggered UPF energy saving
Bibliography