Table of Contents - Y.3229 (04/2026) - Fixed, mobile and satellite convergence - Enhanced architecture for IMT-2020 networks and beyond in support of integrated user-centric service units

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 of IUSU for FMSC in IMT-2020 networks and beyond
7	Enhanced architecture for FMSC in IMT-2020 networks and beyond in support of IUSU
	7.1	Overview
	7.2	Overall architecture
	7.3	Architectural functions
	7.4	Requirements for the reference points
8	Procedures supporting IUSU for FMSC in IMT-2020 networks and beyond
	8.1	Procedures of IUSU service enabling and handling
	8.2	Procedures of IUSU service orchestration and registration
	8.3	Procedures of user equipment register with IUSU
	8.4	Real time service procedure
	8.5	D2D communication service procedure
9	Security considerations
Bibliography