1
Scope
2
References
3
Definitions
4 Abbreviations
5
Conventions
6 General principles of the NGN functional
architecture
7 Overview of the NGN
architecture
7.1
Transport stratum
functions
7.2 Service
stratum functions
7.3 End-user
functions
7.4
Management functions
8 NGN concepts
8.1 Mobility
levels in the NGN architecture
8.2 NGN
service architecture
8.3 Network
topology hiding functions and NAPT traversal
functions
8.4 Overload
control
8.5 Charging
and accounting functions (CAFs)
9 Generalized NGN functional
architecture
9.1 NGN
functional entities (FEs)
9.2
Generalized functional
architecture
9.3
Functional entity descriptions
10 NGN
components
10.1 NGN
service-specific
components
10.2 NGN
transport-specific components
11 Security considerations
Appendix I – Examples of NGN network configurations
I.1
Configurations and topology of the
NGN
I.2
Relationship between the NGN and
administrative
domains
I.3
Relationship between the NGN and
service
domains
I.4
Enterprise role model
I.5
Functional
roles
Appendix II – Transport-stratum access network scenarios
II.1
Introduction
II.2 Scenario 1:
Multi-layered transport stratum
II.3 Scenario 2:
Access aggregation using layer 2
II.4 Scenario 3:
Access aggregation using layer 3
II.5 Scenario 4:
Multi-stage policy enforcement
II.6 Scenario 5:
Partitioning into transport-layer traffic subdomains
Bibliography