ETSI TS 182 023 V2.1.1 (2009-01)

Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Core and enterprise NGN interaction scenarios; Architecture and functional description

DTS/TISPAN-02040-NGN-R2

General Information

• Status: Published
• Publication Date: 14-Jan-2009
• Technical Committee: TISPAN 2 - TISPAN Architecture
• Current Stage: 12 - Completion
• Due Date: 16-Oct-2008
• Completion Date: 15-Jan-2009

Standards Content (Sample)

ETSI TS 182 023 V2.1.1 (2009-01)
Technical Specification


Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);
Core and enterprise NGN interaction scenarios;
Architecture and functional description

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2 ETSI TS 182 023 V2.1.1 (2009-01)



Reference
DTS/TISPAN-02040-NGN-R2
Keywords
interaction, network
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3 ETSI TS 182 023 V2.1.1 (2009-01)
Contents
Intellectual Property Rights . 5
Foreword . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 7
4 Introduction . 8
4.1 General modelling and relationship to NGN releases . 8
4.2 Levels of service provision . 8
4.3 Introduction to the scenarios covered by the present document . 9
5 General requirements . 9
6 Scenarios relating to a level of service of IP connectivity . 9
6.1 Scenario 1: IP VPN providing a virtual leased line between NGCN sites . 9
6.1.1 Introduction. 9
6.1.2 Involved functional entities – originating . 10
6.1.3 Involved functional entities - terminating . 10
6.1.4 Interoperability with other scenarios . 10
6.1.5 Emergency calls . 10
6.1.6 Configuration / provisioning issues . 11
6.1.7 Security issues . 11
6.1.8 Charging issues . 11
6.1.9 Transport control issues . 11
6.2 Scenario 2: IP VPN tunnel providing a virtual leased line between a remote terminal and an NGCN sites . 11
6.2.1 Introduction. 11
6.2.2 Involved functional entities – originating . 11
6.2.3 Involved functional entities - terminating . 12
6.2.4 Interoperability with other scenarios . 12
6.2.5 Emergency calls . 12
6.2.6 Configuration / provisioning issues . 13
6.2.7 Security issues . 13
6.2.8 Charging issues . 13
6.2.9 Transport control issues . 13
7 Scenarios relating to a level of service of session establishment and control of communication
session . 13
7.1 Scenario 3: Session level virtual leased line . 13
7.1.1 Introduction. 13
7.1.2 Involved functional entities – originating . 14
7.1.3 Involved functional entities - terminating . 15
7.1.4 Interoperability with other scenarios . 15
7.1.5 Emergency calls . 15
7.1.6 Configuration / provisioning issues . 16
7.1.7 Security issues . 16
7.1.8 Charging issues . 16
7.1.9 Transport control issues . 16
8 Scenarios relating to a level of service of application level . 16
8.1 General . 16
8.2 Scenario 4: Hosted Enterprise Services (HES) . 16
8.2.1 Introduction. 16
ETSI

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4 ETSI TS 182 023 V2.1.1 (2009-01)
8.2.2 Involved functional entities – originating . 17
8.2.3 Involved functional entities - terminating . 17
8.2.4 Interoperability with other scenarios . 18
8.2.5 Emergency calls . 18
8.2.6 Configuration / provisioning issues . 18
8.2.7 Security issues . 18
8.2.8 Charging issues . 18
8.2.9 Transport control issues . 18
8.3 Scenario 5: Business trunking (subscription based) . 19
8.3.1 Introduction. 19
8.3.2 Involved functional entities – originating . 19
8.3.3 Involved functional entities - terminating . 20
8.3.4 Interoperability with other scenarios . 20
8.3.5 Emergency calls . 20
8.3.6 Configuration / provisioning issues . 21
8.3.7 Security issues . 21
8.3.8 Charging issues . 21
8.3.9 Transport control issues . 21
8.4 Scenario 6: Business trunking (peering based) . 21
8.4.1 Introduction. 21
8.4.2 Involved functional entities – originating . 22
8.4.3 Involved functional entities - terminating . 23
8.4.4 Interoperability with other scenarios . 23
8.4.5 Emergency calls . 24
8.4.6 Configuration / provisioning issues . 24
8.4.7 Security issues . 24
8.4.8 Charging issues . 24
8.4.9 Transport control issues . 24
9 Scenarios relating to roaming . 24
9.1 Scenario 7: NGCN user roaming into NGN public network . 24
9.1.1 Introduction. 24
9.1.2 Involved functional entities. 25
9.1.3 Void . 26
9.1.4 Interoperability with other scenarios . 26
9.1.5 Emergency calls . 26
9.1.6 Configuration / provisioning issues . 26
9.1.7 Security issues . 26
9.1.8 Charging issues . 26
9.1.9 Transport control issues . 26
9.2 Scenario 8: NGCN user roaming into another NGCN site of the same enterprise . 26
9.2.1 Introduction. 26
9.3 Scenario 9: HES user roams into NGCN site of the same enterprise . 27
9.3.1 Introduction. 27
9.4 Scenario 10: HES user roams into another NGN . 27
9.4.1 Introduction. 27
9.5 Scenario 11: NGN public network user roaming into NGCN . 27
9.5.1 Introduction. 27
9.6 Scenario 12: NGCN user roaming into an NGCN of a different enterprise . 27
9.6.1 Introduction. 27
History . 28

ETSI

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5 ETSI TS 182 023 V2.1.1 (2009-01)
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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6 ETSI TS 182 023 V2.1.1 (2009-01)
1 Scope
The present document provides the possible scenarios for:
• the interconnection of an Next Generation Corporate Network (NGCN) with a Next Generation
Network (NGN); and
• the support of NGCN capabilities within an NGN, either towards a User Equipment (UE) or to an NGCN.
Unless otherwise specified by reference to other documents, all requirements relating to architecture and functional
requirements are contained within the present document.
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.
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 182 009: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Architecture to support emergency communication from
citizen to authority".
[2] ETSI TS 181 019: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Business Communication Requirements".
[3] ETSI ES 282 001: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Functional Architecture".
[4] ETSI TS 182 024: "Telecommunications and Internet Converged Services and Protocols for
Advanced Networking (TISPAN); Hosted Enterprise Services; Architecture, functional description
and signalling".
[5] ETSI TS 182 025: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Business trunking; Architecture and functional description".
[6] ETSI TS 183 021: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Endorsement of 3GPP TS 29.162 Interworking between
IM CN Sub-system and IP networks".
ETSI

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7 ETSI TS 182 023 V2.1.1 (2009-01)
[7] ETSI TS 187 003: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Security; Security Architecture".
2.2 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 of the referenced document (including
any amendments) applies.
[i.1] ETSI TR 102 478: "Enterprise Communication in Next Generation Corporate Networks (NGCN)
involving Public Next Generation Networks (NGN)" (also published as ECMA TR/91).
[i.2] draft-ietf-sipping-sbc-funcs-05 (March 2008): "Requirements from SIP (Session Initiation
Protocol) Session Border Control Deployments".
3 Definitions and abbreviations
3.1 Definitions
For the purpose of the present document, the terms and definitions given in TS 181 019 [2] apply:
business trunking
business trunking application
Corporate telecommunication Network (CN)
Hosted Enterprise Services (HES)
Next Generation CN (NGCN)
NGCN site
PNP number
private network traffic
Private Numbering Plan (PNP)
public network traffic
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
API Application Programming Interface
AS Application Server
ASP Application Service Provider
BGCF Breakout Gateway Control Function
CN Core Netwrok
CND Customer Network Device
CNG Customer Network Gateway
DHCP Dynamic Host Configuration Protocol
FQDN Fully Qualified Domain Name
HES Hosted Enterprise Services
HSS Home Subscriber Server
IBCF Interconnection Border Control Function
I-CSCF Interrogating CSCF
IM IP Multimedia
IMCN IP Multimedia Core Network
IMS IP Multimedia Subsystem
IOI Inter Operator Identifier
IP Internet Protocol
IWF InterWorking Function
MACF Multiple Association Control Function
NASS Network Attachment SubSystem
NAT Network Address Translator
ETSI

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8 ETSI TS 182 023 V2.1.1 (2009-01)
NGCN Next Generation Corporate Network
NGN Next Generation Network
P-CSCF Proxy CSCF
PNP Private Numbering Plan
PSAP Public Safety Answering Point
RACS Resource and Admission Control Subsystem
S-CSCF Serving CSCF
SIP Session Initiation Protocol
SSP Session Service Provider
TE Terminal Equipment
TSP Transport Service Provider
UE User Equipment
UPSF User Profile Service Function
URI Uniform Resource Identifier
4 Introduction
4.1 General modelling and relationship to NGN releases
A number of different scenarios will likely exist for enabling interactions between Next-Generation Corporate
Networks (NGCN) and Next Generation (public) Networks (NGN). The present document describes a sub-set of these
scenarios and the architectural and functional requirements that arise from the support of these scenarios. Future
releases may document other scenarios as requirements emerge.
4.2 Levels of service provision
The development of different interaction scenarios based upon the distribution of the hosting of private network
capabilities in the enterprise operator and/or in the public NGN operator leads to the concept of the public NGN
operator being able to offer services to NGCNs and the NGCN users at a number of different levels. This concept is
further described in TR 102 478 [i.1].
The most basic level of service provision is IP connectivity. Differentiation from the Internet can be in the form of
improved or guaranteed quality of service or security. For the purposes of the present document an NGN that provides
this level of service acts as a Transport Service Provider (TSP).
A second level of service provision is in session establishment and control of communication sessions, e.g. voice,
multimedia, messaging. Here the NGN adds value by being involved in the signalling protocol used to establish and
control media sessions. For the purposes of the present document the primary session control signalling protocol
concerned is assumed to be the Session Initiation Protocol (SIP). Added value can include intelligent routing, provision
of quality of service for media, provision of gateway services to legacy networks, assistance in NAT traversal, etc. For
the purposes of the present document an NGN that provides this level of service is known as a Session Service Provider
(SSP).
A third level of service provision is at the application level. Applications can be many and varied, but for the purposes
of the present document an application is assumed to be applied on top of session level services. An application may be
able to monitor or control multi-media sessions (either directly or through a protocol or API) and may or may not be
involved in media as well. Examples of applications that involve media include conferencing services, transcoding and
translation services and call distribution centres. Examples of applications that monitor or control sessions but do not
involve media include presence services, call logging services and UA configuration services. In addition, an
application may be accessed through a session control protocol such as SIP. For the purposes of the present document
an NGN that provides this level of service is known as an Application Service Provider (ASP).
NOTE 1: An NGN acting as an ASP is not necessarily providing these capabilities on an IMS application server, it
is providing any level of functionality above that of an SSP at any appropriate entity.
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9 ETSI TS 182 023 V2.1.1 (2009-01)
An NGN may provide services at one or more of these levels. Not all services offered will be of interest to enterprise
customers and of relevance for interworking with NGCNs. Enterprise customers may use different NGNs for different
levels of service provision and may have different contractual relationships with each of these NGNs. In addition, for a
given communication and depending on the number of parties to be interconnected and/or the number of services to be
accessed, multiple providers may be involved.
NOTE 2: Similarly an NGCN can provide services at these three levels to enterprise users. In particular, services at
the session establishment and control level and/or application level can be provided by an NGCN site to
enterprise users on other NGCN sites or supported by hosted enterprise services.
The scenarios provided in the present document are presented in accordance with this concept.
4.3 Introduction to the scenarios covered by the present
document
The present document has been structured following the service level categories as introduced in clause 4.2 in mind, as
follows:
• clause 6 presents scenarios that relate to provision of IP connectivity level services offered by an NGN;
• clause 7 presents scenarios that relate to provision of session establishment and control of communication
session services offered by an NGN;
• clause 8 presents scenarios that relate to provision of application level services offered by an NGN; and
• clause 9 presents scenarios that relate to provision of session level roaming services offered by an NGN.
The scenarios presented in Clause 6 are IP level virtual leased line services between NGCN sites or between an NGCN
site and a remote NGCN UE.
The scenario presented in clause 7 is a session level virtual leased line.
The application level service scenarios presented in clause 8 are hosted enterprise services (HES), subscription based
business trunking and peering based business trunking.
Clause 9 presents a special class of session level service scenarios that are so distinct from other session level services
th
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