1 Scope
2 References
3 Definitions
3.1 Terms defined elsewhere
3.2 Terms defined in this Recommendation
4 Abbreviations
5 Conventions
6 Overview
6.1 Introduction to IMS
6.2 Use of IMS in NGN
7 Functional entities
7.1 Call session control
function (CSCF)
7.2 Media gateway control
function (MGCF)
7.3 Multimedia resource
function controller (MRFC)
7.4 Breakout gateway control
function (BGCF)
8 Internal reference points
8.1 Reference point MGCF –
CSCF (Mg reference point)
8.2 Reference point CSCF –
MRFC (Mr reference point)
8.3 Reference point CSCF –
CSCF (Mw reference point)
8.4 Reference point CSCF –
BGCF (Mi reference point)
8.5 Reference point BGCF –
MGCF (Mj reference point)
8.6 Reference point BGCF –
BGCF (Mk reference point)
8.7 Reference
point CSCF or BGCF – IBC-FE (Mx reference point)
9 IMS external reference points
9.1 Reference points with
entities in the transfer plane
9.2 Reference point CSCF –
UE (Gm reference point)
9.3 Reference points with
the user profile
9.4 Reference points to
application servers
9.5 Reference points to the
charging environment
10 Reference points to
external networks
10.1 Reference points with
the PSTN/ISDN
10.2 Reference points with
other IP-based service components
11 Mapping between 3GPP IMS
functional entities and NGN functional entities
Appendix I – Relevant IMS specifications in the context of the NGN
functional architecture
Bibliography