Table of Contents - Y.3221 (11/2025) - Fixed, mobile and satellite convergence – Local data switching for IMT-2020 networks and beyond

1	Scope
2	References
3	Definitions
	3.1	Terms defined elsewhere
	3.2	Terms defined in this Recommendation
5	Conventions
6	Overview
7	Requirements of the local data switching in FMSC
8	Architecture of the local data switching in FMSC
9	Information flows of the local data switching in FMSC
	9.1	Network discovery procedure
	9.2	Network registration procedure
	9.3	Network deregistration procedure
	9.4	PDU session establishment procedure for the UPF onboard
10	Security considerations
Bibliography