ISO/IEC TECHNICAL REPORT TR 12860 First edition 2009-04-15 Information technology - Telecommunications and information exchange between systems Next Generation Corporate Networks (NGCN) General Technologies de I'information - Télecommunications et échange d'information entre systemes - Réseaux d'entreprise de prochaine génération (NGCN) — Généralités Reference number ISO/IEC TR 12860:2009(E) IEC Tso @ISO/IEC2009 by IHS under lic ted without license from IHS Not for Resale ISO/IEC TR12860:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The IsO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT @ ISO/IEC2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ISO/IEC2009-All rights reserved py IHS unde I without license from IHS Not for Resale ISO/IEC TR 12860:2009(E) Contents Page Foreword. Introduction vi 1 Scope 2 Normative references . 3 Terms and definitions.. 4 Abbreviated terms 5 Background, 6 General concepts.. 6 6.1 Basic communication architecture.. 6 6.2 Session level architecture . 8 6.2.1 Signalling using SIP 6.2.2 Media path 10 6.2.3 Example 6.3 Domains. 10 6.4 Mobility 11 6.4.1 Roaming of enterprise users outside their home domain. 12 6.4.2 Accommodating guest users on an NGcN.... 13 6.5 The hosting concept.... 13 6.5.1 DedicatedNGCN 14 6.5.2 Enterprise hosted by a single public network infrastructure.. 15 6.5.3 Enterprise hosted by multiple public network infrastructures ............. 15 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 ... 16 6.7 Other technical considerations..... 17 L Scenarios for session-based communications... 17 7.1 Session-based intra-domain communications.. 7.2 Session-based inter-domain communications within a single enterprise network 19 7.2.1 Communication between domains supported by the same infrastructure .... 20 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-basedcommunicationbetweentwoenterprises 23 7.3.1 Extension of enterprise network to include partner networks .. 23 7.3.2 Direct peering... 23 7.3.3 Indirect peering .... 7.3.4 Third party assistance... ..25 7.3.5 Direct peering between two enterprises hosted by the same hosting enterprise ..26 7.4 Session-based communication with users of public networks.... 7.4.1 Communication between an NGCN user and an NGN public network user ..26 7.4