ETSI SR 002 586 V1.1.1 (2008-08)

Special Report
Electronic Communications Networks and Services;
Consequence on the NGN standardization activity
from the EU ECN&S regulatory view point

2 ETSI SR 002 586 V1.1.1 (2008-08)

Reference
DSR/OCG-00017
Keywords
interoperability, interworking, network, regulation,
service
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3 ETSI SR 002 586 V1.1.1 (2008-08)
Contents
Intellectual Property Rights.4
Foreword.4
Introduction .4
1 Scope.5
2 References.5
2.1 Normative references.5
2.2 Informative references.5
3 Definitions and abbreviations.7
3.1 Definitions.7
3.2 Abbreviations.8
4 Description of the NGN .10
4.1 NGN Functional Architecture .10
4.2 New capabilities of NGN .13
4.2.1 ETSI TISPAN NGN.13
4.2.2 3GPP.15
5 Regulatory Requirements for NGN.17
5.1 Decoupling of service from transport.17
5.2 NGN mapped to ECN&S .18
5.3 EC Regulatory targets and technical standardization .20
5.4 Freedom of choice for users .20
5.4.1 Access to ECS providers.20
5.4.2 Interconnection.21
5.5 Mobility.23
5.6 QoS and Network Performance.24
5.7 Customer Protection.24
5.7.1 Privacy.25
5.7.1.1 Identification information.25
5.7.1.2 Location information.25
5.7.2 Control of expenditure (Accounting and charging) .25
5.7.3 Subscription Management.26
5.8 Security.26
5.9 Emergency communications.27
5.10 Numbering and Addressing.27
5.11 e-Accessibility.28
6 Recommendations for future work.29
6.1 Enhancement of provision of new services and freedom of choice for users.29
6.2 Quality of Service and Network performance.29
6.3 Privacy.29
6.4 Security.29
6.5 Emergency Communication.30
6.6 Numbering/addressing/naming and Identity management .30
6.7 e-Accessibility.30
Annex A: NGN IMS overview.31
Annex B: Bibliography.35
History .36

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4 ETSI SR 002 586 V1.1.1 (2008-08)
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 Special Report (SR) has been produced by Advisory Committee Operational Co-ordination Group (OCG).
NOTE: The SR type of deliverable was chosen to publish the contents of the document because the information is
not specifically technical and is an integration of information from many sources. The current version of
the present document was published after endorsement by the ETSI Operational Co-ordination Group,
which represents all technical bodies of ETSI.
Introduction
The application of Article 17 of the Framework Directive (2002/21/EC [i.1]) led to the production of studies like
SR 002 211 [i.2] carried out by ETSI, and other European Standardization Organizations (ESOs). The development of
NGN concepts and other future trends is impacting widely and deeply the future of the e-Communications Networks
and Services, introducing major influence of other sectors, like IT, Broadcasting and other consumer's close products
and services.
European authorities started a revision of the relevant regulatory documents. It is urgent that the appropriate TBs within
ESOs are aware of the regulatory requirements and take them appropriately into account when developing standards for
the NGN. The present document results from a number of fundamental presentations offered during the ECN&S
meetings by the end of 2005 and beginning of 2006 and should evolve with contributions from ESO TBs and feed-back
from CEU and European National Regulatory Authorities (NRAs).
The present document aims at identifying:
- the consequences of NGN standardization from the regulatory view point;
- standards which are produced to achieve public interest objectives;
- areas where further studies are needed.
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5 ETSI SR 002 586 V1.1.1 (2008-08)
1 Scope
The present document is intended for both regulators and technical groups. It looks at the NGN from the technical
regulatory point of view. It assesses how the EU Regulatory Framework applies to the NGN as specified by ETSI
TISPAN in collaboration with 3GPP (e.g. for IMS), TC LI and ITU-T. The present document refers to the Release 1 of
NGN which does not include IPTV nor does it include content matters.
Regarding VoIP, the present document only looks at Voice over NGN. Only the NGN specific regulatory requirements
are considered in the section. Outside the scope are requirements which apply to any networks (e.g. EMC).
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.
Not applicable.
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] Directive 2002/21/EC of the European Parliament and of the council of 7 March 2002 on a
common regulatory framework for electronic communications networks and services (Framework
Directive).
[i.2] ETSI SR 002 211: "Electronic communications networks and services; Candidate list of standards
and/or specifications in accordance with Article 17 of Directive 2002/21/EC".
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6 ETSI SR 002 586 V1.1.1 (2008-08)
[i.3] ETSI ES 282 001: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Functional Architecture".
[i.4] ETSI ES 282 007: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); IP Multimedia Subsystem (IMS); Functional architecture".
[i.5] ITU-T Recommendation Y.2001: "Next Generation Networks - Frameworks and functional
architecture models; General overview of NGN".
[i.6] ITU-T Recommendation Y.2012: "Functional requirements and architecture of the NGN".
[i.7] ITU-T Recommendation Y.2011: "General principles and general reference model for Next
Generation Networks".
[i.8] ETSI TS 181 006: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Direct Communication Service in NGN; Service Description
[Endorsement of OMA-ERELD-PoC-V1]".
[i.9] ETSI ES 282 004: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Functional Architecture; Network Attachment SubSystem
(NASS)".
[i.10] ETSI TS 123 002: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Network architecture (3GPP TS 23.002 version 6.10.0
Release 6)".
[i.11] ITU-T Recommendation Y 2091: "Terms, Definitions and High-Level Terminological Framework
for Next Generation Networks".
[i.12] ETSI TR 180 000: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Terminology".
[i.13] IETF RFC 3261: "SIP: Session Initiation Protocol".
[i.14] ETSI TR 180 001: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Release 1; Release definition".
[i.15] ETSI TS 181 005: "Telecommunications and Internet Converged Services and Protocols for
Advanced Networking (TISPAN); Service and Capability Requirements".
[i.16] ETSI TS 122 101: "3Universal Mobile Telecommunications System (UMTS); Service aspects;
Service principles".
[i.17] ITU-T Recommendation M.3050.1: "Enhanced Telecommunications Operations Map - The
Business Process Framework".
[i.18] ETSI TR 121 905: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Vocabulary for 3GPP Specifications (3GPP TR 21.905
version 7.4.0 Release 7)".
[i.19] ITU-T Recommendation Y.110: "Global Information Infrastructure principles and framework
architecture".
[i.20] ETSI TR 101 878: "Telecommunications and Internet Protocol Harmonization Over Networks
(TIPHON) Release 5; Service Capability Definition; Service Capabilities for a Multi Media Call".
[i.21] ETSI TS 102 261: "Open Network Services and Architecture (ONSA); Abstract architecture and
reference points definition; Mapping of functional architectures and requirements for NGN".
[i.22] ITU-T Recommendation X.115: "Definition of address translation capability in public data
networks".
[i.23] Void.
[i.24] Void.
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7 ETSI SR 002 586 V1.1.1 (2008-08)
[i.25] IETF RFC 3966: "The tel URI for Telephone Numbers".
[i.26] ETSI TS 102 424: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Requirements of the NGN network to support Emergency
Communication from Citizen to Authority".
[i.27] ETSI TS 182 006: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); IP Multimedia Subsystem (IMS); Stage 2 description (3GPP TS
23.228 v7.2.0, modified)".
[i.28] ETSI TS 123 228 (V7.2.0) modified: "IP Multimedia Subsystem (IMS); Stage 2 description".
[i.29] ETSI TS 133 203: "3G security; Access security for IP-based services".
[i.30] ETSI ES 282 010: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Charging management [Endorsement of 3GPP TS 32.240
Release 7, 3GPP TS 32.260 Release 7, 3GPP TS 32.297 Release 7, 3GPP TS 32.298 Release 7 and
3GPP TS 32.299 Release 7, modified]".
[i.31] 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 [Endorsed document 3GPP TS 23.167, Release 7]".
[i.32] ETSI TS 183 021: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Release 1; Endorsement of 3GPP TS 29.162 Interworking
between IM CN Sub-system and IP networks".
[i.33] ETSI TS 129 162: "Interworking between the IM CN subsystem and IP networks".
[i.34] ETSI TS 123 218: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); IP Multimedia (IM) session handling; IM call model; Stage
2 (3GPP TS 23.218)".
[i.35] Treaty of Maastricht (http://en.wikipedia.org/wiki/Three-pillars-of-the-European-Union).
[i.36] ETSI ES 282 003: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Resource and Admission Control Sub-System (RACS):
Functional Architecture".
[i.37] ITU-T Recommendation Y.2205: "Next Generation Networks - emergency telecommunications -
Technical considerations".
3 Definitions and abbreviations
3.1 Definitions
Wherever possible, the present document refers to existing terminology from ETSI and ITU-T sources. The terms and
definitions and a framework relevant to providing a general understanding of Next Generation Networks are provided in
the ITU-T Recommendation Y.2091 [i.11] and in TR 180 000 [i.12].
access network: collection of network entities and interfaces that provides the underlying IP transport connectivity
between the device and the NGN entities
administrative domain: collection of physical or functional entities under the control of a single administration
core network: portion of the delivery system composed of networks, systems equipment and infrastructures,
connecting the service providers to the access network
customer: the customer buys products and services from the Enterprise or receives free offers or services
domains: describes the infrastructure owned by single operators
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domain (General): collection of physical or functional entities which are owned and operated by a player and can
include entities from more than one role
identity: attributes by which an entity or person is described, recognized or known
networks: terms listed here describe the connectivity infrastructure surrounding an NGN
player: organization, or individual, which undertakes one or more roles
role: business activity which fits in a value chain
subscriber: person or organization responsible for concluding contracts for the services subscribed to and for paying
for these services
service domain: collection of physical or functional entities offering IP based services under the control of an NGN
Service Provider which share a consistent set of policies and common technologies
user, end user: the user is the actual user of the products or services offered by the Enterprise
User Equipment (UE): one or more devices allowing user access to network services delivered by NGN
user domain: collection of physical or functional entities under the control of an end user that share a consistent set of
policies and common technologies
user profile: set of information necessary to provide a user with a consistent, personalized service environment,
irrespective of the user's location or the terminal used (within the limitations of the terminal and the serving network)
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
3GPP Third Generation Partnership Project
ACR&CB Anonymous Call Rejection & Call Barring
AF Application Function
ALG Application Level Gateway
AoC Advice of Charge
ARF Access Relay Function
AS Application Server
ASF Application Server Function
B2B Business-to-Business
CDR Call Detail Record
CLIP/OIP Calling Line Identification Presentation / Originating Identification Presentation
CLIR/OIR Calling Line Identification Restriction / Originating Identification Restriction
CoIX Connectivity-oriented Interconnection
COLP/TIP Called Line Identification Presentation / Terminating Identification Presentation
COLR/TIR Called Line Identification presentation Restriction / Terminating Identification presentation
Restriction
CS Circuit Switched
DoS Denial of Service
ECN Electronic Communication Network
ECS Electronic Communication Service
EMC Electro Magnetic Compatibility
ENUM Electronic Numbering
eTVRA Threat, Vulnerability and Risk Assessment for eEurope
FBI Fixed Broadband Access to IMS
FMC Fixed Mobile Convergence
GPRS General Packet Radio Service
HSPA+ HSPA Evolution
HSS Home Subscriber Server
IBCF Interconnection Border Control Function
I-BGF Interconnect Border Gateway Function
I-CSCF Interrogating Call Session Control Function
ICT Information and Communication Technologies
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9 ETSI SR 002 586 V1.1.1 (2008-08)
IM CN IP Multimedia Core Network
IMS IP Multimedia Subsystem
IMS-MGW IMS Media Gateway
IM-SSF IP Multimedia Service Switching Function
IP Internet Protocol
IP-CAN IP Connectivity Access Network
IPTV Internet Protocol TeleVision
ISDN Integrated Service Digital Network
ITU International Telecommunication Union
ITU-T ITU Telecommunication Standardization Sector
IWF InterWorking Function
I-WLAN Interworking WLAN
LI Lawful Interception
LTE Long Term Evolution
MCID Malicious Call IDentification
MGCF Media Gateway Control Function
MM MultiMedia
MMS Multimedia Messaging Service
MRFC Media Resource Function Control
MRFP Multimedia Resource Function Processor
NAPT Network Address and Port Translator
NASS Network Attachment SubSystem
NAT Network Address Translation
NGN Next Generation Network
OSA SCS Open Services Architecture Service Capability Server
PBX Private Branch Exchange
PCC Policy and Charging Convergence
PCRF Policy and Charging Rules Function
P-CSCF Proxy Call Session Control Function
PDBF Profile DataBase Function
PDF Policy Decision Function
PES PSTN/ISDN Emulation Subsystem
PS Packet Switched
PSTN Public Switched Telephone Network
QoS Quality of Service
RACS Resource Admission Control Subsystem
RTSP Real Time Streaming Protocol
SAE System Architecture Evolution
SBLP Service Based Local Policy
S-CSCF Serving Call Session Control Function
SDP Session Description Protocol
SGF Signalling Gateway Function
SIP AS SIP Application Server
SIP Session Initiation Protocol
SLF Subscription Locator Function
SMS Short Message Service
SoIX Service-oriented Interconnection
TDM Time Division Multiplex
TISPAN Telecoms and Internet converged Services and Protocols for Advanced Networking
TLS Transport-Layer Security
T-MGF Trunking Media Gateway Function
TV TeleVision
UE User Equipment
UPSF User Profile Server Function
VCC Voice Call Continuity
WAP Wireless Access Protocol
WLAN Wireless Local Area Network
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4 Description of the NGN
NGN is a term widely used by telecommunication operators to represent a number of current and future structural
changes in the telecommunication sector. The main difference between NGNs and today s PSTNs is a shift from
circuit-switched networks that are traditionally used for voice service to packet-based networks providing a range of
services including voice, video and data. These networks are applicable to various service characteristics. Traditional
voice networks are based on circuit-switching and offer end-to-end quality of service.
The aim of the NGN is to offer more consistent speech quality service than may be achieved on the Internet when best
effort service is used. Although, in many cases a quality of an Internet connection is good and the "self management"
provides great resilience. NGN can be seen as a logical evolution from separate network infrastructures into a unified
network for electronic communications based on IP. Participants from the telecommunication industry consider NGN as
a progression of current technology leading to a multi-service, secure, packet-based global network, which will be able
to offer quality of service and ease of access for end-users (see Bibliography).
The possible migration to Next Generation Networks (NGN) is nowadays becoming an important issue for the major
telecommunication players. The eventual total switch-off of the traditional PSTN is expected to happen in the next ten
years.
There are numerous views of what constitutes NGNs and different operators that have begun the process of migration or
development refer to their networks differently. NGNs can be developed using a number of transmission technologies,
including fibre, cable, fixed, mobile wireless, or further technology upgrades to the existing copper based networks.
This represents the shift from a "one network-one service" approach, to a "one network-many services" one.
The transition to NGN driven by several forces, or enabling factors, is summarized as follows:
• structural changes on the ICT market;
• new users' needs and requirements;
• technology evolution;
• competition in the electronic communications market.
The transition to NGN also offers different opportunities at different levels of the telecommunication market:
For operators, NGN is considered essential for strategically positioning networks to compete in the increasingly
converged world of services and content where voice is no longer the sole source of revenue.
At a market level, NGN is partially driven by the increased demand for ubiquitous, integrated data, voice and video,
mobile and fixed broadband, alongside the increasing role of mobile services in the broadband domain. Operators and
investors seek increased revenue and profitability, greater productivity and broader service offerings. These trends are
facilitating the integration of separate and distinct mobile and fixed technologies (optimized for one service) to enable
the seamless distribution of services over fixed and mobile broadband networks, i.e. transport services, and to create a
unified IP-based multiservice network. In other words, NGN can be viewed as a "communication network that allows
unfettered access to all communication products and services, irrespective of the service provider or network
connection".
4.1 NGN Functional Architecture
The functional architecture of the ETSI TISPAN NGN Release 1 is provided in the ES 282 001 [i.3]. TISPAN IMS (IP
Multimedia Subsystem) functional architecture is defined in ES 282 007 [i.4]. ITU-T NGN frameworks and functional
architecture is provided in ITU-T Recommendation Y.2001 [i.5] and ITU-T Recommendation Y.2012 [i.6].
Both the ETSI as well as the ITU-T NGN architectures are in line with regards to the separation between transport and
services defined in ITU-T Recommendation Y.2011 [i.7].
The separation of services from transport allows them to be offered separately and to evolve independently. The
separation is represented by two distinct blocks called "strata of functionality" by ITU-T and "layers" by ETSI TISPAN.
For the purpose of the present document the term "layers" will be used later in the text. The transport functions reside in
the transport layer and the service functions related to applications reside in the service layer.
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11 ETSI SR 002 586 V1.1.1 (2008-08)
A set of transport functions are solely concerned with conveyance of digital information, of any kind, between any two
geographically separate points. The transport functions provide connectivity.
A set of application functions is related to the service to be invoked. In this layer services may be, e.g. voice services
(including telephone service), data services (including but not limited to Web-based services), or video services
(including but not limited to movies and TV programmes), or some combination thereof (e.g. multimedia services such
as video telephony and gaming).
The following section provides an overview of the NGN functional architecture based on the ES 282 001 [i.3].
The service layer comprises the following components:
• the core IP Multimedia Subsystem (IMS);
• the PSTN/ISDN Emulation Subsystem (PES);
• other multimedia subsystems (e.g. streaming subsystem, content broadcasting subsystem etc.); and
applications;
• common components (i.e. used by several subsystems) such as those required for accessing applications,
charging functions, user profile management, security management, routing data bases (e.g. ENUM), etc.
This subsystem-oriented architecture enables the addition of new subsystems over the time to cover new demands and
service classes. It also provides the ability to import (and adapt) subsystems defined by other standardization bodies.
IP-connectivity is provided to NGN user equipment by the transport layer, under the control of the Network Attachment
Subsystem (NASS) and the Resource and Admission Control Subsystem (RACS). These subsystems hide the transport
technology used in access and core networks below the IP layer.
Each subsystem is specified as a set of functional entities and related interfaces. As a result implementers and operators
may be tempted to combine functional entities where this makes sense in the context of their business models. Where
functional entities are combined the interface between them is internal, is hidden and
un-testable. It is a major task for regulation to ensure open interfaces so that fundamental principles, e.g. access for
service providers to access functions or unrestricted access of users to various service offerings, of the NGN concept as
defined in Y.2001 [i.5] can be met.
Figure 1 provides an overview of the NGN architecture.

Figure 1: TISPAN NGN overall architecture
The functional entities that make up a subsystem may be distributed over network/service provider domains (see
figure 2). The network attachment subsystem may be distributed between a visited and a home network. Service-layer
subsystems that support nomadism may also be distributed between a visited and a home network.
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12 ETSI SR 002 586 V1.1.1 (2008-08)

Figure 2: Distributed subsystems
This architecture supports the service capabilities and requirements identified in TS 181 006 [i.8].
The transport layer comprises a transport control sub layer on top of transfer functions. The transport control sub layer
is further divided in two subsystems:
• Network Attachment Subsystem (NASS)
• Resource and Admission Control Subsystem (RACS).
For the service layer, the TISPAN architecture uses a subsystem oriented approach. Each subsystem relies on its own
architecture model and is specified independently from the others. This enables the addition of new subsystems over the
time to cover new demands and service classes. It also provides the ability to import and adapt subsystems defined by
other standardization bodies such as the IMS.
The service layer comprises the following subsystems:
The "Core" IP Multimedia Subsystem (IMS)
The IP Multimedia Subsystem (IMS) core component of the NGN architecture (Core IMS) supports the provision of
SIP-based multimedia services to NGN terminals. It also supports the provision of PSTN/ISDN simulation services.
The PSTN/ISDN Emulation subsystem (PES)
The PSTN/ISDN Emulation Subsystem supports the emulation of PSTN/ISDN services for legacy terminals connected
to the NGN, through residential gateways or access gateways.
The Streaming Subsystem
The Streaming Subsystem supports the provision of RTSP - based streaming services to NGN terminals.
The Content Broadcasting Subsystem
The Content Broadcasting Subsystem supports the broadcasting of multimedia content (e.g. movies, TV channels, etc.)
to groups of NGN terminals. The architecture of the content broadcasting subsystem is outside the scope of TISPAN
NGN Release 1.
Common components
The NGN architecture includes a number of functional entities that can be accessed by more than one subsystem. These
are:
• User Profile Server Function (UPSF);
• Subscription Locator Function (SLF);
• Application Server Function (ASF);
• Interworking Function (IWF);
• Interconnection Border Control Function (IBCF); and
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13 ETSI SR 002 586 V1.1.1 (2008-08)
• Charging and Data Collection Functions.
Figure 3 illustrates the position of the IMS in the overall NGN architecture.

Figure 3: TISPAN IMS and its environment
Based on the NGN fundamental aspects specified in this clause and regulatory requirements as specified in clause 5, the
interfaces between the Core IMS and other sub-systems and functions as provided in the annex A may require an
analysis from the regulatory point of view.
4.2 New capabilities of NGN
This clause provides an overview of new NGN capabilities as being specified in ETSI TISPAN NGN (Release 2) and
3GPP (Release 7). The focus is on those capabilities that may be relevant from the regulatory point of view.
4.2.1 ETSI TISPAN NGN
The general objective of all ETSI TISPAN release-based standards is to provide a framework, that provides an
extensible platform for future service and architecture development. The objectives for TISPAN NGN Release 1 were
to provide such an extensible platform and architecture, and to demonstrate viability by specifying the details for two
significant objectives:
• to enable delivery of the services supported in a 3GPP IMS to broadband fixed lines;
• to enable PSTN/ISDN replacement (in whole or in part).
A deployed Release 1 NGN may support either of the above objectives, or both using the same core network, transport,
service and applications.
NGN Release 1 is designed to be extensible, allowing new services to be incorporated into the release 1 subsystems,
and to enable other subsystems to be defined. Thus, NGN Release 2 covers:
• Completion of Release 1 topics;
• Release 2 enhancements extending the Release 1 capabilities.
Release 2 new services and capabilities that cover additions to Release 1 services and capabilities.
The following section highlights those of TISPAN NGN Release 2 work areas that may be relevant from the regulatory
point of view, however it does not cover the exhaustive list of all work areas and topics.
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14 ETSI SR 002 586 V1.1.1 (2008-08)
IMS evolution
Enhancement of service requirements and network capabilities for Release 2. This includes the overall requirements,
from the perspective of users, service providers, operators and content providers for TISPAN Release 2. Release 1
completion or enhancement of some PSTN/ISDN simulation services (MCID, ACR&CB, AoC).
Release 1 completion of Emergency services.
New topic on Business Communication and Business trunking cover requirements for connection of (IP-) PBX' to the
NGN and the architecture and functionality required for business trunking.
Non-session based services
New topic on IPTV covers:
- IPTV impacts on the TISPAN NGN transport layer and specifies the network requirements as relates to the
transport layer taking terminal capabilities into account.
- Service layer requirements to integrate IPTV service with NGN communication services, including broadcast
TV, etc.
- Architecture and functions of an IPTV system that makes use of the NGN IMS architecture and its features.
- Architecture and functions of an IPTV system by incorporating IPTV functions within the NGN architecture.
Fixed mobile convergence (FMC)
New topic on fixed-mobile convergence scenarios in order to derive requirements and capabilities to support FMC
capabilities and the impact of multimedia communication services.
User data
User identity issues in order to review the service requirements and architecture for NGN, identify the naming,
Numbering, Addressing and Identification issues.
Corporate networks
Core and Enterprise NGN interaction scenarios and architectural requirements for enterprise network / NGN
interconnection at all layers.
Hosted enterprise services describes the architecture and functionality required to support enterprise and corporate
services as IMS applications hosted in the NGN operator's network on behalf of an enterprise.
Customer gateway and customer devices
Service requirements and capabilities for customer networks when customer devices are connected to TISPAN NGN
via a Customer Network.
Interconnection issues
Service-oriented Interconnection approach (SoIX) for NGN interconnection instead of a pure Connectivity oriented
Interconnection approach (CoIX), building on the ENUM initiative. NGN Interconnection may be grouped in:
- Service-oriented Interconnection (SoIX); and
- Connectivity-oriented Interconnection (CoIX).
A number of requirements for SoIx have been defined that may be relevant from the regulatory point of view, such as
support of LI, support of appropriate privacy, support of authorization, support of authentication and access control,
support of communications and data security (including integrity, confidentiality), support of DoS protection and
security. Two interconnection scenarios are considered:
• SoIX interconnection between IMS platforms;
• SoIX interconnection between IMS and other IP platforms.
ETSI
15 ETSI SR 002 586 V1.1.1 (2008-08)
Accounting and charging
Release 1 completion of Online charging including charging for new services and coordination with RACS to provide
RACS support of charging.
QoS and traffic engineering
New topic on QoS reporting identifies the capabilities (e.g. QoS reporting, resource monitoring, etc.) in order to
guarantee an adequate QoS to the media flows and defines specific requirements for the NGN environment related to
the identified capabilities.
Other topics
Enhancement of Release 1 Methods and Protocols for Security including Threat Analysis, Counter Measures and NGN
Security Countermeasures Stage 2.
Lawful Interception addresses provision for lawful interception architecture for IP-based Multimedia Services and
PSTN-Emulation Services.
eSecurity for Web-user - eTVRA database.
Media Security addresses key management/key distribution for user plane (/media) and the protection of the media data.
It will also provide considerations on regulatory aspects such as lawful interception, and privacy.
4.2.2 3GPP
Service support
Earlier 3GPP releases already provide efficient support for the services including the most popular applications e.g. text
messaging (SMS), Web and WAP access, multi-media messaging (MMS) and content downloads, e.g. ring tones, music
and video clips, but also other services, with less penetration today but with high expectations for future growth,
including mobile email access, mobile TV, mobile gaming and full track music downloads.
3GPP Release 7 focuses on providing improved support and performance for real-time conversational and interactive
services such as Push-to-talk Over Cellular, picture and video sharing, and Voice and Video over IP. These services are
becoming available as operators deploy IMS based on 3GPP Release 5.
3GPP Release 7 also includes definition of supplementary services using SIP.
Core Network and IMS features
3GPP Release 7 also provides new and enhanced Core Network and IMS features. IMS is extended to wireline
subscribers to make it the common platform for both fixed and mobile networks going forward. IMS Multi-media
Telephony defines a telephony service for Voice and Video over IP, allowing operators to provide telephony services in
the packet switched (PS) domain that is consistent with the already existing services in the CS domain. Voice Call
Continuity provides seamless mobility between the voice component of the IMS Multi-media Telephony and CS voice.
CSI provides the means for a mobile station to combine a CS voice call with PS-based IMS services between the same
two users, enabling picture and video sharing with CS voice calls in order to provide enriched voice services. Policy and
Charging Convergence (PCC) allows operators to perform advanced dynamic QoS control and charging for packet data
services.
Fixed Broadband Access to IMS (FBI)
Fixed Broadband Access provides a means of extending IMS services to wireline subscribers. The work on Fixed
Broadband Access (FBI) will embed IMS as the framework for advanced services for many types of operators. IMS is
extended to act as a common core and services platform for fixed and mobile networks.
Under the Fixed Broadband Access (FBI) work, 3GPP is considering requirements from a number of different
communities of operators including those based on DSL and cable technology. A number of features have been
introduced primarily in order to extend the IMS towards providing services for fixed broadband access:
• NAT traversal.
• Optional use of SIP preconditions for wireline access.
ETSI
16 ETSI SR 002 586 V1.1.1 (2008-08)
• PSTN bridging - the use of IMS as a transit network with PSTN round the edge.
Policy and Charging Convergence (PCC)
PCC provides enhanced and future-proof tools to allow operators to perform advanced dynam
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