1、 ETSI TR 102 633 V1.1.1 (2008-10)Technical Report Corporate Networks (NGCN);Next Generation Corporate Networks (NGCN) - GeneralETSI ETSI TR 102 633 V1.1.1 (2008-10) 2Reference DTR/ECMA-00352 Keywords IP, SIP ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00
2、Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more tha
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5、ent document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. Europ
6、ean Telecommunications Standards Institute 2008. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP O
7、rganizational Partners. ETSI ETSI TR 102 633 V1.1.1 (2008-10) 3Contents Intellectual Property Rights 5g3Foreword . 5g3Introduction 5g31 Scope 6g32 References 6g32.1 Normative references . 6g32.2 Informative references 7g33 Definitions 7g33.1 Corporate telecommunication Network (CN) (EG 201 017) 7g33
8、.2 Domain . 7g33.3 Enterprise network . 7g33.4 Home server . 8g33.5 Transport service provider (TSP) . 8g33.6 Medium 8g33.7 Next Generation CN (NGCN) 8g33.8 Next Generation Network (NGN) 8g33.9 Private network traffic 8g33.10 Public network traffic . 8g33.11 Roaming . 9g33.12 Roaming hub 9g33.13 Ses
9、sion service provider (SSP) . 9g33.14 SIP intermediary . 9g34 Abbreviations . 9g35 Background 10g36 General concepts 11g36.1 Basic communication architecture . 11g36.2 Session level architecture . 13g36.2.1 Signalling using SIP 13g36.2.2 Media path 14g36.2.3 Example 15g36.3 Domains . 15g36.4 Mobilit
10、y 16g36.4.1 Roaming of enterprise users outside their home domain 16g36.4.2 Accommodating guest users on an NGCN . 17g36.5 The hosting concept 17g36.5.1 Dedicated NGCN 19g36.5.2 Enterprise hosted by a single public network infrastructure . 19g36.5.3 Enterprise hosted by multiple public network infra
11、structures 20g36.5.4 Enterprise hosted by a combination of enterprise infrastructure and a public network infrastructure 20g36.6 Private network traffic and public network traffic . 21g36.7 Other technical considerations . 22g37 Scenarios for session-based communications 22g37.1 Session-based intra-
12、domain communications. 22g37.2 Session-based inter-domain communications within a single enterprise network 24g37.2.1 Communication between domains supported by the same infrastructure . 24g37.2.2 Communications between domains of an NGCN via a TSP . 25g37.2.3 Communications between domains of an NG
13、CN using private network traffic through a hosting NGN 25g37.2.4 Communications between domains of an NGCN using public network traffic through a public SSP such as an NGN 26g37.2.5 Communications between a dedicated NGCN domain and a domain hosted by an NGN 26g3ETSI ETSI TR 102 633 V1.1.1 (2008-10)
14、 47.2.6 Communications between a dedicated NGCN domain and a domain hosted by an NGN as private network traffic via an intermediate NGN domain . 27g37.3 Session-based communication between two enterprises 27g37.3.1 Extension of enterprise network to include partner networks . 27g37.3.2 Direct peerin
15、g . 27g37.3.3 Indirect peering . 28g37.3.4 Third party assistance . 29g37.3.5 Direct peering between two enterprises hosted by the same hosting enterprise infrastructure . 30g37.4 Session-based communication with users of public networks 30g37.4.1 Communication between an NGCN user and an NGN public
16、 network user 31g37.4.2 Communication between an NGCN user and an NGN public network user with break-in or break-out function in the NGN . 31g37.4.3 Communication between an NGCN user and a public network user of a remote NGN . 32g37.4.4 Communication between an NGCN user and a public network user o
17、f a remote NGN with break-in or break-out function in the local NGN 32g37.4.5 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 . 32g37.4.6 Communication between an NGCN user and a PSTN/ISDN user via an NGN . 33g37.4.7
18、Communication between an enterprise user hosted by a public network infrastructure and a public network user of that same infrastructure . 33g37.5 Session-based roaming . 34g37.5.1 An NGCN user at a visited sub-domain of the NGCN . 34g37.5.2 An NGCN user at a visited sub-domain of the NGCN using pri
19、vate network traffic through an NGN . 34g37.5.3 An NGCN user at a visited NGN 35g37.5.4 An NGCN user at a visited NGN using indirect roaming . 35g37.5.5 An NGN-hosted enterprise user at a visited NGN 35g37.5.6 An NGN-hosted enterprise user at a visited NGCN . 36g38 NGN considerations . 36g38.1 Summa
20、ry of scenarios involving NGN 36g38.1.1 Scenarios involving NGN as a TSP 36g38.1.2 Scenarios involving NGN as a SSP 37g38.1.3 Roaming scenarios involving NGN as a SSP . 37g38.2 Interfacing NGCN to NGN 37g38.2.1 Subscription-based business trunking . 37g38.2.2 Peering-based business trunking . 38g38.
21、2.3 Roaming 38g39 Application considerations . 38g310 Current standards and standardization efforts 39g310.1 IETF Real-time Applications and Infrastructure (RAI) area 39g310.2 SIP Forum 40g310.3 ETSI TISPAN 40g310.4 3GPP 40g310.5 ITU-T Study Group 13 . 40g3History 41g3ETSI ETSI TR 102 633 V1.1.1 (20
22、08-10) 5Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual
23、Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation,
24、 including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Report (TR) has
25、 been produced by ECMA on behalf of its members and those of the European Telecommunications Standards Institute (ETSI). Introduction The present document is the first of a series of Ecma publications that explore IP-based enterprise communication involving Corporate telecommunication Networks (CNs)
26、 (also known as enterprise networks) and in particular Next Generation Corporate Networks (NGCN). The series particularly focuses on inter-domain communication, including communication between parts of the same enterprise, between enterprises and between enterprises and carriers. The present provide
27、s 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. The present document is based upon the practical experience of Ecma membe
28、r companies and the results of their active and continuous participation in the work of ISO/IEC JTC1, ITU-T, ETSI, IETF and other international and national standardization bodies. It represents a pragmatic and widely based consensus. In particular, Ecma acknowledges valuable input from experts in E
29、TSI TISPAN. ETSI ETSI TR 102 633 V1.1.1 (2008-10) 61 Scope The present document is part of a series of publications that provides an overview of IP-based enterprise communication involving Corporate telecommunication Networks (CNs) (also known as enterprise networks) and in particular Next Generatio
30、n Corporate Networks (NGCN). The series particularly focuses on session level communication based on the Session Initiation Protocol (SIP) i.6, with an emphasis on inter-domain communication. This includes communication between parts of the same enterprise (on dedicated infrastructures and/or hosted
31、), between enterprises and between enterprises and public networks. Key technical issues are investigated, current standardization work and gaps in this area are identified and a number of requirements are stated. The present document provides general information on the subject, defines some archite
32、ctural concepts, identifies various communication scenarios, and provides a framework in support of other publications that provide greater detail on particular topics. At the time of publication of the present document, one further document in the series has been published, on the subject of identi
33、fication and routing i.3. The scope of the present document is limited to communications with a real-time element, including voice, video, real-time text and instant messaging. Further details on mobility in an NGCN environment are to be found in ECMA TR/92 i.2. 2 References References are either sp
34、ecific (identified by date of publication and/or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. Non-specific reference may be made only to a complete document or a part thereof and only in the following cases: - if it is accepted that
35、it will be possible to use all future changes of the referenced document for the purposes of the referring document; - for informative references. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. For online
36、referenced documents, information sufficient to identify and locate the source shall be provided. Preferably, the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the reference should, as far as possible, remain valid for the expected life of t
37、he document. The reference shall include the method of access to the referenced document and the full network address, with the same punctuation and use of upper case and lower case letters. NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarante
38、e their long term validity. 2.1 Normative references The following referenced documents are indispensable for the application of the present document. For dated references, only the edition cited applies. For non-specific references, the latest edition of the referenced document (including any amend
39、ments) applies. Not applicable. ETSI ETSI TR 102 633 V1.1.1 (2008-10) 72.2 Informative references The following referenced documents are not essential to the use of the present document but they assist the user with regard to a particular subject area. For non-specific references, the latest version
40、 of the referenced document (including any amendments) applies. i.1 ECMA-269: “Services for Computer Supported Telecommunications Applications (CSTA) Phase III“. i.2 ECMA TR/92: “Corporate Telecommunication Networks - Mobility for Enterprise Communication“. i.3 ECMA TR/96: “Next Generation Corporate
41、 Networks (NGCN) - Identification and Routing“. i.4 ITU-T Recommendation H.248: “Gateway control protocol“. i.5 ITU-T Recommendation H.323: “Packet-based multimedia communications systems“. i.6 IETF RFC 3261: “SIP: Session Initiation Protocol“. i.7 IETF RFC 3550: “RTP: A Transport Protocol for Real-
42、Time Applications“. i.8 IETF RFC 4566: “SDP: Session Description Protocol“. i.9 SIP Forum sf-adopted-twg-IP-PBX-SP-Interop-sibley-sipconnect: “IP-PBX / Service Provider Interoperability - SIPConnect 1.0 Technical Recommendation“. i.10 ETSI EG 201 017: “Corporate Telecommunication Networks (CN); Stan
43、dardization plan“. i.11 ETSI TR 180 000: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); NGN Terminology“. i.12 IEEE 802.1x: “Port Based Network Access Control“. 3 Definitions For the purposes of the present document the following definitions apply
44、: 3.1 Corporate telecommunication Network (CN) (EG 201 017) Telecommunication network serving a corporation, i.e. a single organization, an extended enterprise, or an industry application group as defined by the International Chamber of Commerce (ICC). NOTE: Sets of equipment Customer Premises Equip
45、ment (CPE) and/or Customer Premises Networks (CPN) are typically located at geographically dispersed locations and are interconnected to provide networking services to a defined group of users. A CN can employ connection-oriented and connectionless technology. 3.2 Domain Session level capabilities w
46、ithin a single administrative area. NOTE: A domain may or may not correspond to a DNS domain. 3.3 Enterprise network A CN comprising session level capabilities and optionally application layer capabilities hosted on one or more infrastructures. ETSI ETSI TR 102 633 V1.1.1 (2008-10) 8NOTE: Infrastruc
47、tures can include the enterprises own infrastructure (dedicated NGCN), the infrastructure of one or more hosting NGNs, the infrastructure of one or more hosting NGCNs or any combination of these. 3.4 Home server For a given user, as identified by a SIP address of record, the SIP intermediary that co
48、ntains registrar and proxy functionality in support of that user. NOTE: It is therefore the SIP intermediary with which the users UAs register. 3.5 Transport service provider (TSP) A business or organization separate from an enterprise that provides services for transporting data based on the use of
49、 IP at the network layer, thereby allowing the enterprise to communicate with entities outside the enterprise or with geographically dispersed parts of the enterprise. NOTE 1: Communication can but need not be via the public Internet. NOTE 2: A TSP should not intervene above the transport layer. This does not preclude a business or organization that acts as a TSP also acting as the provider of higher level services, e.g. as an SSP. 3.6 Medium A given type of payload transported between session users (e.g. audio, video, text), separate from
