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 Introduction
7 General principles of the functional architecture
8 Functional network architecture overview
8.1 NGN architecture overview
8.2 IMT-Advanced architecture overview and NGN
9 Generalized functional architecture and functional entities
9.1 Network functions
9.2 Network functional entities