ETSI TS 181 005 V3.3.1 (2009-12)

Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Service and Capability Requirements

RTS/TISPAN-01061-NGN-R3

General Information

• Status: Published
• Publication Date: 16-Dec-2009
• Technical Committee: TISPAN 1 - TISPAN Services
• Current Stage: 12 - Completion
• Due Date: 26-Nov-2009
• Completion Date: 17-Dec-2009

Standards Content (Sample)

Technical Specification
Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);
Service and Capability Requirements

2 ETSI TS 181 005 V3.3.1 (2009-12)

Reference
RTS/TISPAN-01061-NGN-R3
Keywords
provider, service, user
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ETSI
3 ETSI TS 181 005 V3.3.1 (2009-12)
Contents
Intellectual Property Rights . 6
Foreword . 6
Introduction . 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 . 11
4 Capabilities for the support of IP Multimedia Services . 12
4.1 Business models . 12
4.2 Service requirements . 12
4.2.1 General services requirements . 12
4.2.2 Handling of sessions . 12
4.2.2.1 Service re-configuration . 12
4.2.2.1.1 General requirement . 12
4.2.2.1.2 Service reconfiguration when roaming . 13
4.2.3 PSTN/ISDN simulation service . 13
4.2.4 IMS messaging . 13
4.2.5 Presence service . 13
4.2.6 Location service . 13
4.2.7 Video telephony service . 13
4.2.8 Communication diversion service . 13
4.2.9 Subaddressing (SUB) . 13
4.2.10 User-to-User Signalling (UUS). 13
4.2.11 Customized multimedia information services . 13
4.3 Mobility . 13
4.3.1 Mobility in TISPAN NGN . 13
4.3.2 Voice call continuity . 13
4.4 Numbering, naming and addressing . 14
4.5 Terminal requirements . 14
4.6 Regulatory service requirements . 14
4.6.1 Lawful Intercept . 14
4.6.2 Emergency service . 14
4.6.3 Identifying malicious communications . 14
4.6.4 Anonymous communications rejection . 14
4.7 Access network requirements . 14
4.8 Customer networks . 14
4.8.1 General . 14
4.8.2 Home and small office networks . 15
4.8.3 Corporate networks . 15
4.9 Interworking . 15
4.10 Quality of Service (QoS) . 15
4.11 Security requirements . 16
4.11.1 General . 16
4.11.2 NGN security . 16
4.11.3 Network domain security . 16
4.12 Charging and accounting . 16
4.13 Roles within an NGN . 16
5 PSTN/ISDN emulation service . 17
5.1 Business models . 17
5.2 Service requirements . 17
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4 ETSI TS 181 005 V3.3.1 (2009-12)
5.3 Mobility . 17
5.4 Numbering, naming and addressing . 18
5.5 Terminal requirements . 18
5.6 Regulatory service requirements . 18
5.6.1 Lawful Intercept service requirements . 18
5.6.2 Emergency service requirements . 18
5.6.3 Malicious Communication Identity service requirements (MCID) . 18
5.6.4 Anonymous Communications Rejection service requirements (ACR) . 18
5.7 Access networks . 19
5.7.1 Wireline access . 19
5.8 Customer networks . 19
5.8.1 Home and small office networks . 19
5.8.2 Corporate networks . 19
5.9 Interworking . 19
5.9.1 Interworking with legacy PSTN/ISDN . 19
5.9.2 Interworking with PSTN/ISDN emulation . 19
5.9.3 Interworking with PLMN . 20
5.9.3.1 Interworking with IMS based PLMN . 20
5.9.3.2 Interworking with PLMN - CS Domain . 20
5.9.4 Interworking with packet cable network . 20
5.9.5 Interworking with NGN IMS network . 20
5.9.6 Interworking with other networks . 20
5.10 Quality of Service (QoS) . 20
5.11 Security requirements . 20
5.12 Charging and accounting . 20
6 Codecs services . 20
6.1 General . 21
6.2 Audio codec . 21
6.3 Wideband codecs . 21
6.3.1 General . 21
6.3.2 Wideband codecs in terminals for wideband telephony services . 21
6.3.3 Wideband codecs in networks . 22
6.4 Video codec . 22
7 Network attachment requirements . 22
8 CPE configuration . 23
9 Network management. 23
10 Control of processing overload . 23
11 IP addressing . 24
12 NGN interconnection . 24
12.1 General . 24
12.2 Requirements for SoIx interconnection . 25
12.3 SoIx interconnection between NGN platforms. 26
12.4 SoIx interconnection between NGN and other IP platforms . 26
13 IPTV . 27
13.1 General . 27
13.2 Service-related requirements . 27
13.3 Network capabilities . 27
14 Transport stratum . 27
15 Prevention of Unsolicited Communication (PUC) . 27
15.1 Objectives for PUC . 27
15.2 User to NGN requirements for PUC. 27
15.3 NGN to User requirements for PUC. 27
15.4 NGN architectural requirements for PUC . 28
Annex A (informative): Basic communication cases for IMS networks . 29
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5 ETSI TS 181 005 V3.3.1 (2009-12)
Annex B (informative): Guidance for terminal implementation . 30
Annex C (informative): Bibliography . 31
Annex D (informative): Change history . 32
History . 33

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6 ETSI TS 181 005 V3.3.1 (2009-12)
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).
The present document describes the Service and Capability Requirements of TISPAN NGN Release 2.
Introduction
The present document specifies the requirements that need to be fulfilled by NGN technical specifications to provide
services in an NGN.
The present document considers different service sets: IP Multimedia Services, PSTN/ISDN Emulation services and
IPTV. Each of these service sets has its own clause, which is further divided into clauses providing clear and precise
requirements for each of these service sets. Further clauses provide generic network requirements to support service
deployment and interoperability.
The present document provides generic requirements on networks from a service point of view. Specific details of
individual services and capabilities are provided in other documents.
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7 ETSI TS 181 005 V3.3.1 (2009-12)
1 Scope
The present document specifies network requirements in terms of service-related capabilities for TISPAN NGN. The
present document places requirements for all TISPAN NGN subsystems.
The present document provides generic requirements for services and interoperability in TISPAN NGN in terms of the
capabilities for a network or networks.
Requirements on service-related subsystems provide sufficient details for architecture, networking requirements and
protocols to be specified. Requirements on service independent subsystems are contained within the service-related
subsystem requirements.
Specific service requirements may be contained in other documents, as identified in the present document, and by other
documents referencing the present document.
The present document does not define services, only capabilities and requirements. The present document does not
place requirements on terminals or other customer-owned equipment. The present document specifies the
service-related requirements that are used to determine the network architecture, requirements and control protocols for
a network interface to a customer environment.
NOTE: The present document uses the term "NGN" only in the context of TISPAN.
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 122 340: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS) messaging; Stage 1
(3GPP TS 22.340)".
[2] ETSI TS 122 141: "Universal Mobile Telecommunications System (UMTS); Presence service;
Stage 1 (3GPP TS 22.141 version 7.0.0 Release 7)".
[3] 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".
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8 ETSI TS 181 005 V3.3.1 (2009-12)
[4] ETSI TS 188 003: "Telecommunications and Internet Converged Services and Protocols for
Advanced Networking (TISPAN); OSS requirements; OSS definition of requirements and
priorities for further network management specifications for NGN".
[5] ETSI TS 187 001: " Telecommunications and Internet Converged Services and Protocols for
Advanced Networking (TISPAN); NGN SECurity (SEC); Requirements".
[6] ETSI TS 122 228: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Service requirements for the Internet Protocol (IP)
multimedia core network subsystem (IMS); Stage 1 (3GPP TS 22.228 version 7.3.0 Release 7)".
[7] ITU-T Recommendation G.722: "7 kHz audio-coding within 64 kbit/s".
[8] ETSI TS 126 171: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Speech codec speech processing functions; Adaptive
Multi-Rate - Wideband (AMR-WB) speech codec; General description (3GPP TS 26.171
Release 7)".
[9] ITU-T Recommendation G.729.1: "G.729 based Embedded Variable bit-rate coder: An 8-32 kbit/s
scalable wideband coder bitstream interoperable with G.729".
[10] 3GPP2 C.S0014-C (Version 1.0): "Software Distribution for Enhanced Variable Rate 2 Codec
(EVRC), Speech Service Options 3, 68, and 3 70, Specification", January 2007.
[11] ETSI TS 122 101: "Universal Mobile Telecommunications System (UMTS); LTE; Service
aspects; Service principles (3GPP TS 22.101 Release 7)".
[12] ETSI TS 181 018: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Requirements for QoS in a NGN".
[13] ETSI TS 122 173: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; IP Multimedia Core Network Subsystem (IMS)
Multimedia Telephony Service and supplementary services; Stage 1 (3GPP TS 22.173 Release 8)".
[14] ETSI TS 122 115: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Service aspects; Charging and billing (3GPP TS 22.115
version 8.3.0 Release 8)".
[15] ETSI TS 122 401: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); TISPAN; Videotelephony over NGN Service Description
(3GPP TS 22.401 version 8.0.0 Release 8)".
[16] ETSI TS 122 182: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; Customized Alerting Tone (CAT) requirements;
Stage 1 (3GPP TS 22.182 version 8.4.0 Release 8)".
[17] 3GPP TS 22.183: "Customized Ringing Signal (CRS) requirements Release 9".
[18] ETSI TS 122 071: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Location Services (LCS); Service description; Stage 1
(3GPP TS 22.071 version 8.0.0 Release 8)".
[19] ETSI TS 123 228: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS); Stage 2
(3GPP TS 23.228 Release 7)".
[20] ETSI TS 123 003: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; Numbering, addressing and identification
(3GPP TS 23.003 Release 7)".
[21] ETSI TS 181 016: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Service Layer Requirements to integrate NGN services and
IPTV", Release 3.
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9 ETSI TS 181 005 V3.3.1 (2009-12)
[22] ETSI TS 181 014: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Requirements for network transport capabilities to support
IPTV services".
[23] ITU-T Recommendation G.711: "Pulse code modulation (PCM) of voice frequencies".
[24] ITU-T Recommendation G.729 (Annex A): "Coding of speech at 8 kbit/s using conjugate structure
algebraic-code-excited linear-prediction - Annex A: Reduced complexity 8 kbit/s CS-ACELP
speech codec".
[25] ITU-T Recommendation H.263: "Video coding for low bit rate communication".
[26] ITU-T Recommendation H.264: "Advanced video coding for generic audiovisual services".
[27] ITU-T Recommendation G.722.2: "Wideband coding of speech at around 16 kbit/s using Adaptive
Multi-Rate Wideband (AMR-WB)".
[28] ETSI TS 187 005: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Release 2 Lawful Interception; Stage 1 and Stage 2
definition".
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 180 000: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); NGN Terminology".
[i.2] Void.
[i.3] IETF RFC 4282: "The Network Access Identifier".
[i.4] ETSI TR 187 009: "Telecommunications and Internet Converged Services and Protocols for
Advanced Networking (TISPAN); Feasibility study of prevention of unsolicited communication in
the NGN".
[i.5] ETSI TS 187 015: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Specifications for PUC (Prevention of Unsolicited
Communication) in the NGN".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in TS 122 228 [6] and TR 180 000 [i.1] and
the following apply:
application provider: NGN operator role that offers NGN applications to the Customers making use of the services
capabilities provided by the NGN Service Provider
NOTE: It can perform user authentication at the application level.
black list: list of identity information whom parties are identified as with malicious information
NOTE: This list is managed by the user or the service provider.
Fixed Terminal (FT): Terminal connected to the TISPAN NGN network either via a corded interface or a fixed-
wireless interface (e.g. Wi-Fi, Bluetooth or DECT/DECT-NG)
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10 ETSI TS 181 005 V3.3.1 (2009-12)
IP multimedia application: See TS 122 228 [6].
IP Multimedia Core Network Subsystem (IM CN Subsystem): See TS 122 228 [6].
IP multimedia service: See TS 122 228 [6].
IP multimedia session: See TS 122 228 [6].
NGN Access Network Provider (NANP): NGN operator role that aggregates traffic between multiple last mile access
networks and one or multiple NGN Connectivity Providers
NOTE: The NANP is also responsible for resource management, gating and traffic control between the User
Equipment and the IP edge as appropriate, according to the transport control service requested by the
NGN Connectivity Provider. The NANP holds the subscriber access profile (e.g. ADSL line QoS profile,
NCP associated with a physical ADSL line, etc.) as well as policy and configuration data associated with
the NGN connectivity provider. The NANP does not own subscriber access profile information.
NGN Connectivity Provider (NCP): NGN operator role that provides connectivity between the user and one or
multiple Core Transport Networks
NOTE: The NCP provides a connectivity service to users and therefore owns the commercial relationship with
them and the subscriber access profile data (e.g. user authentication credentials, set of allowed
QoS-enabled applications). The NCP is also responsible for performing admission control decisions as
well as guaranteeing and monitoring the agreed QoS and security characteristics of traffic to and from a
particular user.
NGN Core Network Provider (NCNP): NGN operator role that relies in infrastructure supported by different types of
high-speed technology, e.g. ATM, SDH, others, and aggregates traffic between edge nodes located in different access
networks, or between an edge node located in an access network and an external network, e.g. PSTN, or other IP
network types
NOTE: The NCNP is also responsible for core resource management, gating, QoS control and traffic control,
between the core network border entities, e.g. C-BGF and I-BGF, according to the transport control
service requested by the NGN Connectivity Provider. The NCNP is also responsible for policy
enforcement and NAT related handling.
NGN operator role: activity or set of activities performed by a telecom operator played in the context of a NGN
deployment scenario
NOTE: Each activity may denote different types of roles, e.g., business role or technical role, depending on the
nature of the services or tasks performed in each scenario. Independently of the numbers and types of
roles identified for the players in these deployment scenarios, the following rules apply:
a telecom operator player is composed of one or more roles;
each of these roles is either a business role, a technical role or both;
at least one role is a business role within an administrative domain.
NGN Service Provider (NSP): NGN operator role that offers NGN based services which share a consistent set of
policies and common technologies
NOTE: The NSP provides common functionalities e.g. user service authentication and identification, service
control, charging, etc. Several Application Providers can use the same NSP to deliver applications to the
Customers.
nomadism: See TR 180 000 [i.1].
portability: See TR 180 000 [i.1].
unknown party: party who is unknown by the other party (e.g. not in his Address Book), different from "anonymous")
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11 ETSI TS 181 005 V3.3.1 (2009-12)
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACR Anonymous Communications Rejection service requirements
ADSL Asymmetric Digital Subscriber Line
AMR Adaptive Multi-Rate
AN Access Network
ATM Asynchronous Transfer Mode
C-BGF Core-Border Gateway Function
CDR Charging Data Record
CN Core Network
CoIx Connectivity-oriented Interconnection
COMIF Customized Originating Multimedia Information Filtering
COMIP Customized Originating Multimedia Information Presentation
CPE Customer Premises Equipment
CS Circuit Switched
CTMIF Customized Terminating Multimedia Information Filtering
CTMIP Customized Terminating Multimedia Information Presentation
DoS Denial of Service
DSL Digital Subscriber Line
ECN Electronic Communication Network
EVRC Enhanced Variable Rate Codec
EVRC-B EVRC wideBand
HW Hardware
I-BGF Interconnection Border Gateway Function
IM IP Multimedia
IMS IP Multimedia Subsystem
IP Internet Protocol
IPTV IP Television
IPv4 Internet Protocol version 4
IPv6 Internet Protocol version 6
ISDN Integrated Services Digital Network
ISP Internet Service Provider
LI Lawful Interception
MCID Malicious Communication Identity service requirements
NAI Network Access Identifier
NANP NGN Access Network Provider
NASS Network Attachment Subsystem
NAT Network Address Translation
NB NarrowBand
NCNP NGN Core Network Provider
NCP NGN Connectivity Provider
NG Next Generation
NGN Next Generation Network
NSP NGN Service Provider
PES PSTN/ISDN Emulation Subsystem
PLMN Public Land Mobile Network
PSTN Public Switched Telephone Network
PUC Prevention of Unsolicited Communication
QoS Quality of Service
RACS Resource and Admission Control Subsystem
SDH Synchronous Digital Hierarchy
SLA Service Level Agreements
SoIx Service-oriented Interconnection
SP Service Provider
SUB Subaddressing
TDM Time Division Multiplexing
TE Terminal Equipment
UC Unsolicited Communication
UNI User to Network Interface
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12 ETSI TS 181 005 V3.3.1 (2009-12)
URI Uniform Resource Identifier
UUS User-to-User Signalling
VoIP Voice over IP
VPN Virtual Private Network
WB WideBand
xBGF x-Border Gateway Function
4 Capabilities for the support of IP Multimedia Services
This clause covers the requirements of the IP Multimedia services supported by the NGN IMS.
4.1 Business models
The business models shall be as described in TS 122 228 [6].
4.2 Service requirements
4.2.1 General services requirements
As specified in TS 122 228 [6].
4.2.2 Handling of sessions
As specified in TS 122 228 [6], TS 122 173 [13] in addition to the following.
4.2.2.1 Service re-configuration
To allow rich service offerings by networks without overloading the terminals and clients, user centric networking
service capability may be offered. With the intelligence in the network, the services can be downloaded and used only
when they are requested.
4.2.2.1.1 General requirement
As a service provider/network option the IMS may support the re-configuration of services available to the user when
the users access its services from a location other than the home (subscribed-to) location.
The services may be dependent on the access network and arrangements between the Application provider and the
access network provider including roaming cases.
The network shall be able to determine the capability of a user device based on the capability announced by the end user
device before offering its services/applications to the end user.
The network shall be able to announce one or more of the network services and applications to the user device based on
the user device capability and the requirements of one or more network services and applications supported by the
network.
The network shall accept the customized service profile requested by the end user after successful
authentication/authorization of the user, and update the subscription database accordingly for billing/charging purposes
and for future record of the user preferences.
The lifetime of a service client downloaded on a user device shall be agreed between the user and the network before the
download. The service provider/network provider shall be able to determine the lifetime.
Basic services shall be supported permanently on the user device (e.g. voice services).
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13 ETSI TS 181 005 V3.3.1 (2009-12)
4.2.2.1.2 Service reconfiguration when roaming
When roaming into a new network, the service client(s) may be overwritten by new applicable version depending on the
capability of the network and the offered service in that network.
4.2.3 PSTN/ISDN simulation service
As specified in clause TS 122 228 [6] and TS 122 173 [13].
4.2.4 IMS messaging
The capabilities to support immediate messaging and session based messaging shall be as described in TS 122 340 [1].
4.2.5 Presence service
The capabilities to support Presence Service shall be as described in TS 122 141 [2].
4.2.6 Location service
As specified in TS 122 071 [18].
4.2.7 Video telephony service
As specified in TS 122 401 [15].
4.2.8 Communication diversion service
As specified in TS 122 173 [13].
4.2.9 Subaddressing (SUB)
As specified TS 122 228 [6].
4.2.10 User-to-User Signalling (UUS)
As specified in TS 122 228 [6].
4.2.11 Customized multimedia information services
As specified in TS 122 182 [16] and TS 22.183 [17].
4.3 Mobility
4.3.1 Mobility in TISPAN NGN
As specified in TS 122 101 [11].
In addition services should be able to be reconfigured so as to be suitable for the target network and target device. The
service shall be reconfigured at the time the user first accesses the service from a new location.
4.3.2 Voice call continuity
The requirements for voice call continuity in TS 122 101 [11] clause 21 applies for TISPAN NGN networks.
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14 ETSI TS 181 005 V3.3.1 (2009-12)
4.4 Numbering, naming and addressing
As specified in TS 123 228 [19] and TS 123 003 [20].
4.5 Terminal requirements
The present document does not specify terminal requirements. However, NGN terminals (not precluding network
adaptors) that comply with the IMS UNI interface offered by the network shall be supported by the NGN.
Terminal developers guidelines are provided in annex B.
4.6 Regulatory service requirements
As specified in TS 122 228 [6] and TS 122 101 [11].
NOTE: Additional regulatory requirements should be taken into account in further revisions of the present
document.
4.6.1 Lawful Intercept
The capabilities to support Lawful Intercept shall be as described in TS 187 005 [i.2].
4.6.2 Emergency service
As specified in TS 122 228 [6].
4.6.3 Identifying malicious communications
As specified in TS 122 228 [6].
4.6.4 Anonymous communications rejection
As specified in TS 122 228 [6].
4.7 Access network requirements
Any access to the NGN core shall provide IP connectivity, i.e. allow transport of IP packets between end user
equipment and the NGN core.
Solutions for access to the NGN core shall support the assignment of IP addresses to the end user equipment by the
access network. These addresses may not be routable in the public Internet.
Solutions for access to the NGN core shall not require changes to existing access technology infrastructure. All
solutions for access to the NGN core shall support the presence of NAT and firewalls in the access network
environment. Impacts on access networks shall be minimized.
An NGN deployment shall not inhibit user access to the Internet and other IP networks through existing mechanisms,
e.g. ISP offering of internet access to DSL users.
4.8 Customer networks
4.8.1 General
Access from a customer network to the NGN core shall provide IP connectivity, i.e. allow for transport of IP packets
from the end user equipment.
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15 ETSI TS 181 005 V3.3.1 (2009-12)
Solutions for access from a customer network to the NGN shall be able to cope with the assignment of IP addresses to
the end user equipment by the customer network. These addresses may not be routable in the public Internet.
Solutions for access from a customer network to the NGN shall not require technological changes to existing customer
network technologies.
Solutions for access from a customer network to the NGN shall have minimal impact on existing customer network
deployments.
The diagnostic operations on the Customer Network by an operator shall be performed in accordance with rules
protecting the user's privacy.
4.8.2 Home and small office networks
Solutions for access from a Home and Small Office network to the NGN shall be able to cope with NAT and firewalls
in the home/small office environment.
Solutions for access from a Home and Small Office network to the NGN shall support the following configurations:
• Direct connectivity and interaction between the individual terminals and the NGN.
• Indirect connectivity and interaction between the individual terminals and the NGN (e.g. via IP PBXs).
4.8.3 Corporate networks
Solutions for access from a corporate network to the NGN shall be able to cope with NAT and firewalls in the corporate
environment.
Solutions for access from a Corporate network to the NGN shall support the following configurations:
• Direct connectivity and interaction between the individual terminals and the NGN (e.g. to support Ipcentrex
configurations).
• Indirect connectivity and interaction between the individual terminals and the NGN (e.g. via IP PBXs).
A mechanism shall be available in the network to provide information, if the PSTN/ISDN resources are not available.
4.9 Interworking
As specified in TS 122 228 [6].
4.10 Quality of Service (QoS)
The NGN shall support the following:
• A wide range of QoS-enabled services
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