Table of Contents

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviated terms
5 Background
6 General concepts
   6.1 Basic communication architecture
   6.2 Session level architecture
        6.2.1 Signalling using SIP
        6.2.2 Media path
        6.2.3 Example
   6.3 Domains
   6.4 Mobility
        6.4.1 Roaming of enterprise users outside their
               home domain
        6.4.2 Accommodating guest users on an NGCN
   6.5 The hosting concept
        6.5.1 Dedicated NGCN
        6.5.2 Enterprise hosted by a single public
               network infrastructure
        6.5.3 Enterprise hosted by multiple public
               network infrastructures
        6.5.4 Enterprise hosted by a combination of enterprise
               infrastructure and a public network infrastructure
   6.6 Private network traffic and public network traffic
   6.7 Other technical considerations
7 Scenarios for session-based communications
   7.1 Session-based intra-domain communications
   7.2 Session-based inter-domain communications within a
        single enterprise network
        7.2.1 Communication between domains supported by
               the same infrastructure
        7.2.2 Communications between domains of an NGCN
               via a TSP
        7.2.3 Communications between domains of an NGCN
               using private network traffic through a
               hosting NGN
        7.2.4 Communications between domains of an NGCN
               using public network traffic through a
               public SSP such as an NGN
        7.2.5 Communications between a dedicated NGCN domain
               and a domain hosted by an NGN
        7.2.6 Communications between a dedicated NGCN domain
               and a domain hosted by an NGN as private network
               traffic via an intermediate NGN domain
   7.3 Session-based communication between two enterprises
        7.3.1 Extension of enterprise network to include
               partner networks
        7.3.2 Direct peering
        7.3.3 Indirect peering
        7.3.4 Third party as
        7.3.5 Direct peering between two enterprises hosted
               by the same hosting enterprise infrastructure
   7.4 Session-based communication with users of public
        networks
        7.4.1 Communication between an NGCN user and an
               NGN public network user
        7.4.2 Communication between an NGCN user and an
               NGN public network user with break-in or
               break-out function in the NGN
        7.4.3 Communication between an NGCN user and a
               public network user of a remote NGN
        7.4.4 Communication between an NGCN user and a
               public network user of a remote NGN with
               break-in or break-out function in the local NGN
        7.4.5 Communication between an NGCN user and a
               public network user of a remote NGN with
               break-in or break-out function in the remote NGN
        7.4.6 Communication between an NGCN user and a
               PSTN/ISDN user via an NGN
        7.4.7 Communication between an enterprise user hosted
               by a public network infrastructure and a public
               network user of that same infrastructure
   7.5 Session-based roaming
        7.5.1 An NGCN user at a visited sub-domain of
               the NGCN
        7.5.2 An NGCN user at a visited sub-domain of the
               NGCN using private network traffic through
               an NGN
        7.5.3 An NGCN user at a visited NGN
        7.5.4 An NGCN user at a visited NGN using
               indirect roaming
        7.5.5 An NGN-hosted enterprise user at a visited NGN
        7.5.6 An NGN-hosted enterprise user at a visited NGCN
8 NGN considerations
   8.1 Summary of scenarios involving NGN
        8.1.1 Scenarios involving NGN as a TSP
        8.1.2 Scenarios involving NGN as a SSP
        8.1.3 Roaming scenarios involving NGN as a SSP
   8.2 Interfacing NGCN to NGN
        8.2.1 Subscription-based business trunking
        8.2.2 Peering-based business trunking
        8.2.3 Roaming
9 Application considerations
10 Current standards and standardisation efforts
   10.1 IETF Real-time Applications and Infrastructure
        (RAI) area
   10.2 SIP Forum
   10.3 ETSI TISPAN
   10.4 3GPP
   10.5 ITU-T Study Group 13

Abstract

Specifies general information on the subject, defines some architectural concepts, identifies various communication scenarios, and provides a framework in support of other publications that provide greater detail on particular topics.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Organization for Standardization
Pages
ISBN
Committee	JTC 1