1 Scope
2 References
3 Definitions
3.1 Terms defined elsewhere
3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Signalling architecture for IP based SMS over NGN
5.1 Architecture model
5.2 Functional entities in support of IP based SMS
5.3 Reference points
6 Signalling requirements for IP-based SMS over NGN
6.1 General requirements
6.2 Transport layer interworking requirements
6.3 Service layer interworking requirements
7 Security considerations