ETSI TS 182 025 V2.1.1 (2008-09)

Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Business trunking; Architecture and functional description

DTS/TISPAN-02042-NGN-R2

General Information

• Status: Published
• Publication Date: 10-Sep-2008
• Technical Committee: TISPAN 2 - TISPAN Architecture
• Current Stage: 12 - Completion
• Due Date: 22-Jul-2008
• Completion Date: 11-Sep-2008

Standards Content (Sample)

ETSI TS 182 025 V2.1.1 (2008-09)
Technical Specification


Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);
Business trunking;
Architecture and functional description

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2 ETSI TS 182 025 V2.1.1 (2008-09)



Reference
DTS/TISPAN-02042-NGN-R2
Keywords
architecture, functional, trunking
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3 ETSI TS 182 025 V2.1.1 (2008-09)
Contents
Intellectual Property Rights . 6
Foreword . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 9
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 9
4 Overview . . 10
4.1 General principles. 10
4.2 Access network interconnection . 10
4.3 Service level layer interconnection . 11
5 Functional architecture . 11
5.1 General . 11
5.2 Subscription based business trunking . 12
5.2.1 General . 12
5.2.2 Used functional entities at the service layer . 12
5.2.3 Used reference points at the service layer . 12
5.2.4 Used functional entities at the transport layer . 12
5.2.5 Used reference points at the transport layer . 13
5.3 Peering-based business trunking . 13
5.3.1 General . 13
5.3.2 Used functional entities at the service layer . 13
5.3.3 Used reference points at the service layer . 13
5.3.4 Used functional entities at the transport layer . 14
5.3.5 Used reference points at the transport layer . 14
5.4 Session-level virtual leased line . 14
5.4.1 General . 14
5.4.2 Used functional entities at the service layer . 14
5.4.3 Used reference points at the service layer . 14
5.4.4 Used functional entities at the transport layer . 15
5.4.5 Used reference points at the transport layer . 15
5.5 Support for roaming NGCN user . 15
5.5.1 General . 15
5.5.2 Used functional entities at the service layer . 15
5.5.3 Used reference points at the service layer . 15
5.5.4 Used functional entities at the transport layer . 16
5.5.5 Used reference points at the transport layer . 16
5.6 Support for roaming NGN user . 16
6 Procedures . 16
6.1 Subscription based business trunking . 16
6.1.1 Introduction. 16
6.1.2 Identification . 16
6.1.3 Registration . 17
6.1.4 Requests originating from an NGCN user entering NGN. 17
6.1.4.1 General . 17
6.1.4.2 NGCN not trusted by NGN . 18
6.1.4.3 NGCN trusted by NGN . 18
6.1.5 Requests terminating to an NGCN user leaving NGN . 19
6.1.5.1 General . 19
6.1.5.2 NGCN not trusted by NGN . 19
6.1.5.3 NGCN trusted by NGN . 20
ETSI

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4 ETSI TS 182 025 V2.1.1 (2008-09)
6.1.6 Business trunking applications . 20
6.1.6.1 General . 20
6.1.6.2 Routeing capabilities . 20
6.1.6.2.1 Overview . 20
6.1.6.2.2 Break-in . 20
6.1.6.2.3 Break-out . 20
6.1.6.2.4 Bulk rerouting . 20
6.1.6.3 Communication admission control . 21
6.1.6.4 Anonymous communication rejection. 21
6.1.6.5 Communication barring . 21
6.1.7 Signalling transparency . 21
6.1.8 Involvement of functions on the media path . 21
6.1.9 Handling of the P-Access-Network-Info header . 22
6.1.10 Emergency calls . 22
6.1.11 Charging . 22
6.1.12 Advice of Charge . 22
6.1.13 NAT traversal . 23
6.1.14 Private network traffic . 23
6.2 Peering-based business trunking . 23
6.2.1 Introduction. 23
6.2.2 Identification . 23
6.2.3 Registration . 23
6.2.4 Requests originating from an NGCN user entering NGN. 24
6.2.4.1 General . 24
6.2.4.2 NGCN not trusted by NGN . 24
6.2.4.3 NGCN trusted by NGN . 24
6.2.5 Requests terminating to an NGCN user leaving NGN . 24
6.2.5.1 General . 24
6.2.5.2 NGCN not trusted by NGN . 25
6.2.5.3 NGCN trusted by NGN . 25
6.2.6 Business trunking application . 25
6.2.7 Signalling transparency . 25
6.2.8 Involvement of functions on the media path . 25
6.2.9 Handling of the P-Access-Network-Info header . 25
6.2.10 Emergency calls . 26
6.2.11 Charging . 26
6.2.12 Advice of Charge . 26
6.2.13 NAT traversal . 26
6.2.14 Private network traffic . 26
6.3 Session-level virtual leased line between NGCN sites . 27
6.3.1 Introduction. 27
6.3.2 Identification . 27
6.3.3 Registration . 27
6.3.4 Session originating from a NGCN user entering NGN . 27
6.3.4.1 General . 27
6.3.4.2 NGCN not trusted by NGN . 27
6.3.4.3 NGCN trusted by NGN . 27
6.3.5 Session terminating to an NGCN user leaving NGN . 27
6.3.5.1 General . 27
6.3.5.2 NGCN not trusted by NGN . 27
6.3.5.3 NGCN trusted by NGN . 27
6.3.6 Business trunking applications . 27
6.3.7 Signalling transparency . 28
6.3.8 Involvement of functions on the media path . 28
6.3.9 Handing of the P-Access-Network-Info header . 28
6.3.10 Emergency calls . 28
6.3.11 Charging . 28
6.3.12 Advice of Charge . 28
6.3.13 NAT traversal . 28
6.3.14 Private network traffic . 28
6.4 NGCN user roaming into NGN public network . 28
6.4.1 Introduction. 28
ETSI

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5 ETSI TS 182 025 V2.1.1 (2008-09)
6.4.2 Identification . 28
6.4.3 Registration . 29
6.4.4 Requests originating from an NGCN user roaming in NGN . 29
6.4.5 Requests terminating on an NGCN user roaming in NGN . 29
6.4.6 Business trunking applications . 29
6.4.7 Signalling transparency . 29
6.4.8 Involvement of functions on the media path . 29
6.4.9 Handing of the P-Access-Network-Info header . 30
6.4.10 Emergency calls . 30
6.4.11 Charging . 30
6.4.12 Advice of Charge . 30
6.4.13 NAT traversal . 30
6.4.14 Private network traffic . 30
7 Use of transport functions . 30
7.1 Use of transport control sublayer . 30
7.1.1 Use of NASS. 30
7.1.2 Use of RACS . 31
7.2 Use of transport processing functions . 31
8 Security. 31
9 Management . 31
Annex A (informative): Example signalling flows of business trunking and roaming
arrangements . 32
A.1 Scope of signalling flows . 32
A.2 Introduction . 32
A.3 Signalling flows for registration . 32
A.3.1 Introduction . 32
A.3.2 Registration of a roaming NGCN UE visiting an NGN/IMS with which the NGCN has a direct roaming
agreement . 32
A.3.2.1 General . 32
A.3.2.2 Signalling flow for registration of a roaming NGCN UE visiting an NGN/IMS with which the
NGCN has a direct roaming agreement . 33
A.3.2.3 Overview of routing decisions . 39
A.4 Signalling flows for call origination . 40
A.5 Signalling flows for call termination . 40
Annex B (informative): Service Level Agreement (SLA) considerations . 41
Annex C (informative): Bibliography . 42
History . 43

ETSI

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6 ETSI TS 182 025 V2.1.1 (2008-09)
Intellectual 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 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, 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 Specification (TS) has been produced by ETSI Technical Committee Telecommunications and Internet
converged Services and Protocols for Advanced Networking (TISPAN).
ETSI

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7 ETSI TS 182 025 V2.1.1 (2008-09)
1 Scope
The present document provides architecture and functional requirements for business trunking for the Next Generation
Network.
The present document also specifies the protocol requirements for the NGCN to attach to the NGN (in particular the IM
CN subsystem) and also any protocol requirements relation to application servers provided in support of business
trunking.
Business trunking is a set of NGN capabilities that may be applied to communications between Next Generation
Corporate Networks (NGCN) using the NGN as a transit.
2 References
References are either specific (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 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 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 the 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 guarantee
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 amendments) applies.
[1] ETSI TS 181 019: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Business Communication Requirements".
[2] ETSI ES 282 001: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Functional Architecture Release 1".
[3] ETSI ES 282 004: "Telecommunications and Internet converged Servic
...