International Telecommunication Union
ITU activities related to
IP-based networks
Greg Jones
ITU Telecommunication Standardization Sector
(ITU-T)
ITU Seminar on Standardization
Accra, Ghana, 27-28 May 2004
ITU-T IP Related Studies
1. ITU-T IP Project
2. ITU-T SG11 Signalling & IP activities
3. IP Cable Communications
4. IP-QoS/Performance
5. IP-Optical Network & Performance Aspects
6. Numbering
7. IP and Security
8. Multimedia (MM)
27-28 May 2004
2
ITU-T’s IP Project
o Covers IP related ITU-T work
o IP Project Description version 8
• see ITU-T Study Group 13 website
• itu.int/ITU-T/studygroups/com13
27-28 May 2004
3
IP project areas
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
27-28 May 2004
Integrated architecture
Impact to telecommunications access infrastructures of
access to IP applications
Interworking between IP based network and switchedcircuit networks, including wireless based networks
Multimedia applications over IP
Numbering and addressing
Transport for IP-structured signals
Signalling support, IN and routing for services on IPbased networks
Performance
Integrated management of telecom and IP-based
networks
Security aspects
Network capabilities including requirements for
resource management
Operations and Maintenance (OAM) for IP
Utilization of IPv6 in telecommunication networks
4
Scope of the IP Project
4
IP Applications
Including Multi media - Q 3/13 and SG 10 and SG16
Signalling Support - SG 11
Service Interworking
Qs 2/13, 5/13
3
7
2
IP and
non-IP
Access Qs 12/13,
14/13,
SGs 4, 15
and 16
Network Capabilities Qs 1, 2, and 3/13, SG 9
Interworking – Q5/13, SG16 and SSG
11
IP and
non-IP
Access Qs 12/13,
14/13,
SGs 4, 15
and 16
3
IP Performance - Q 6/13, SGs 2, 4 and 12 8
IP Transport – Qs10/13, 16/13, SG 15
2
6
Management - SG 4, 6/SSG, 14/15, 3/16 9
Naming, Numbering, Addressing and Routing - SG 25
7
13
Overall Network Architecture and Framework - Qs 1, 11, 14 and16/13 1
Operational Issues - SGs 2, 3, 4 and 17
27-28 May 2004
= Work area
12
10
5
SG13 IP Work
o Y.1231 - IP Access Network Architecture
o Y.1310 - Transport of IP over ATM in public
networks
o Y.1401 - General requirements for
interworking with IP-based Networks
o Y.1241 - Support of IP-based services using
IP transfer capabilities
27-28 May 2004
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SG13 IP work
o Y.1710 - Requirements for OAM functionality for
MPLS networks
o Y.1540 - IP packet transfer and availability
performance parameters
o Y.1541 - IP performance objectives and
allocations
o Y.1311 - IP VPN
o Y.1311.1 - IP VPN over MPLS
o Y.satIP - Satellite IP networking (arch, mcst, QoS)
o Y.123.qos - IP access quality of service
o Y.ipbypass - IP bypass in access networks
27-28 May 2004
SG13 Future
o Study groups continue to build
links with the IETF
o Develop and manage the IP Project
o Work programme
see itu.int/ITU-T/dbase
27-28 May 2004
(2) ITU-T Study Group 11
Signalling & IP activities
o Defines Signalling requirements and protocols
for:
• enhancements to existing Recommendations
on access (UNI) and (inter)-network (NNI)
signalling protocols for PSTN, ISDN and
Packet (ATM and IP)-based networks
• Some Mobility & MM related functions
• the support of voice, data and Multi-media
communications and services
• emerging NGN architectures, signalling
requirements, and control Protocols
including Internet Protocol (IP) related
control functions
o Lead Study Group for IN
27-28 May 2004
9
ITU-T SG11 work focus
o Interactions between IN and IP-based
networks
o IP-related signalling protocols
o Bearer (ATM, IP) Independent Call
Control (i.e. BICC)
o Signalling transport over IP
27-28 May 2004
10
SS7 Convergence towards
Packet based Networks
o Intelligent Network architecture and
protocols enhance
o For Call control signalling, Bearer
Independent Call Control (BICC)
protocols - over Packet based
transport networks
• BICC Recs approved (2000 & 2001).
• BICC CS3 under development
27-28 May 2004
11
(3) IP Cable Communications
IPCablecom (SG9)
o Defines architecture and interface
specs
 interactive services over cable
television network using IP
o Market driver: IP telephony
27-28 May 2004
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IPCablecom Service
Possibilities
o Residential/ Business IP Telephony
o Video IP telephony
o Voice/data/video unified messaging
o Enhanced conferencing and media
services
o Entertainment Services
•
27-28 May 2004
Real-time multiplayer interactive
gaming
13
IPCablecom Components
AN
CMS
CM
HFC
PSTN
Gateway
Managed IP
Network
PSTN
MTA CM
Embedded MTA
AN Access Node
CM Cable Modem
CMS Call Management Servers
HFC Hybrid Fiber Coax network
MTA Multimedia Terminal Adapter
PSTN Public Switched Tel. Network
27-28 May 2004
Back Office
Servers
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IPCablecom Recs. for
interoperability intra-zone
and with PSTN
A set of recommendations in 2001/2002
27-28 May 2004
Architecture
J.160 Architecture
Signalling
J.162 Network Call
Signalling
J.165 IPCablecom
Signalling Transport
Protocol
J.171 Trunk Gateway
Control Protocol
Quality of Service
J.163 Dynamic QoS
Media/Codecs
J.161 Audio Codec
Requirements.
OSS
J.164 Event Messaging
J.166 MIB Framework
J.167 MTA Provisioning
J.168 MTA MIB
J.169 NCS MIB
Security
J.170 (02/02) Security
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IPCablecom Recs. for
interoperability inter-zone
and inter-domain directly
over managed IP
backbones
Quality of Service
J.174 Inter-domain QoS
Security
J.170 Security
Signalling
For further study
OSS
J.164 Event Messaging
Architecture
For further study
27-28 May 2004
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(4) IP-QoS/Performance
o QoS Classes
• Basis for IP Network QoS Control
o IP QoS control
• IP/PSTN network convergence
o Y.1541
• Network performance objectives for IPbased services
o Y.1540=I.380
• Internet protocol data communication
service - IP packet transfer and availability
performance parameters
o QoS signalling protocols  Y.1541
27-28 May 2004
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QoS Parameters
ITU-T SG12/16
User Perceived QoS
SERVICE
ITU-T SG16/11
Codec Performance, VAD, Frames per Packet, APPLICATION
Jitter Buffer Size, Codec Delay, FEC (Redundancy)
ITU-T SG13/IETF
Max Packet Loss, Max Mean Delay, Max Delay
Variation
27-28 May 2004
TRANSPORT
18
Some Discussion topics on IP
Network QoS Control
o Harmonized IP QoS signalling
o Interworking IP QoS mechanisms
27-28 May 2004
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(5) IP-Optical Network &
Performance Aspects
o IP-Optical Networks: Motivation
• Infrastructure Attributes
• Capabilities
• Operational Benefits
27-28 May 2004
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IP/Optical - Performance
Benefits & Challenges
o Performance Benefits
• Increased transmission capacity
• Reduced packet transfer delay, delay
variation, loss, error
• Lower call set up delays and blocking
probabilities
• Improved service availability
o Some Challenges
• Specify interoperable performance
signalling protocols
• Relate IP user/client requirements with
control mechanisms
• Define compatible network management
strategies
27-28 May 2004
21
IPPM and Question 6/13
o New RFCs
• Loss Patterns
• Bulk Transfer
Capacity
o Current (IETF)
Drafts
• Packet Reordering
• Active Meas.
Protocol Req.
• IPPM MIB
o New Work
• Link Bandwidth
Capacity
27-28 May 2004
o Performance
Objectives
• Y.1541 (May
2002), six QoS
Classes
o Suggest QoS
Signaling
Support/Methods
o Parameter
Revisions
• Y.1540 (Nov 2002)
o “other” Packet
Transfer
• MPLS?
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(6) Numbering
o ENUM Significance:
- Mapping telephone numbers onto Internet.
- Could allow conventional telephones to
call IP terminals (PCs).
- ITU Responsibility: Define and implement
administrative procedures that coordinate
delegations of E.164 numbering resources
into the agreed DNS name servers
- Draft Recommendation E.A-ENUM is being
prepared by Study Group 2
27-28 May 2004
23
(7)IP and Security
Directory Access Control with X.509
Attribute Certificates:
o The user given Attribute Certificate (AC)
which strongly binds his/her name to the
privileges being given to him/her
o The AC is signed by the Attribute Authority
(Resource Owner or his delegate)
o Similar to X.509v3 certificate, only holds a
sequence of attributes rather than a public
key
o An attribute certificate can be stored
anywhere since it is secure and self contained
27-28 May 2004
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Standardisation Work of
Q. 9/17
o Friends attributes in X.501, X.511
o Distributed page results service in X.518
o Related Entries in X.501, X.511, X.518
o Alignment with IETF standards
o Defect reports for entire X.500-series
27-28 May 2004
25
ITU-T Special Study Group
IMT-2000 and Beyond
o Q.3/SSG Identification of existing and
evolving IMT-2000 Systems
• Q.1741 3GPP security specifications
o Q.1/SSG
Service and network capability
requirements and network architecture
o & Q.7/SSG
Convergence of fixed and
existing IMT-2000 systems
27-28 May 2004
26
Study Group 16
Security-related Questions in the
MediaCom2004 project
Q.C/16 - MM Applications & Services
F.706
Q.D/16 - Interoperability of MM Systems & Services
Q.G/16 - Security of MM Systems & Services
H.233, H.234, H.235
Q.F/16 - MM Quality of Service & E-2-E Performance in MM Systems
Q.1/16
Q.2/16
Q.3/16
Q.4/16
MM Systems,
Terminals &
Data
Conferencing
MM over
Packet
Networks
using
H.323
systems
Infrastructure
&
Interoperability
for MM over
Packet
Network
Systems
Video and
Data
conferencing
using
Internet
supported
Services
H.320
H.324
T.120
H.225.0
H.323
H.450
H.460
27-28 May 2004
H.245
H.246
H.248
Q.5/16
Mobility
for MM
Systems
&
Services
H.501
H.510
H.530
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Q.G/16 Work and Study
Items Highlights
o Investigate confidentiality and privacy of all
o
o
o
o
o
o
27-28 May 2004
signaling
Address centralized key management for MM
systems
Security for MM Mobility
Optimize voice encryption, develop video
encryption
MM security support for emergency services
Consolidate or develop new security profiles
Security interworking H.323-SIP
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Emergency Telecommunication
Services (ETS) Security for MM
Applications and Systems
o Security objectives:
• prevent theft of service and denial of
service by unauthorized user
• support access control and authorization of
ETS users
• confidentiality and integrity of calls
• provide rapid and user-friendly
authentication of ETS users
o H.SETS : provisional title for a new work
item under study in Q.G/16 - focus on the
multimedia security aspects of ETS
27-28 May 2004
29
(8)Multimedia (MM)
ITU-T Study Group 16 MediaCom 2004 objective
o to create a framework for the harmonized and
coordinated development of multimedia
communication standardization for use across all
ITU-T and ITU-R Study Groups, and in close
cooperation with other regional and international
SDOs and industry forums
27-28 May 2004
30
MEDIACOM 2004
Framework in SG16
FSA Framework Study Areas
MEDIACOM 2004 (Q A/16)
Generic Questions B/16 to H/16
Framework Standardisation Areas (FSA)
Equipment and system questions
1/16 to 15/16
27-28 May 2004
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Framework Study Areas
(FSA)
o
o
o
o
o
o
o
o
27-28 May 2004
Project MediaCom 2004
(A/16)
MM Architecture
(B/16)
MM Applications and Services (C/16)
Interoperability of MM Systems and
Services
(D/16)
Media Coding
(E/16)
QoS & E-E performance in MM Systems
(F/16)
Security of MM Systems and Services
(G/16)
Accessibility
(H/16)
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MM Element Interdependence
Equipment/protocol perspective
Network Specific Recommendations
ISDN
B-ISDN
PSTN
Mobiles
Packets
F.MDS
F.700
Service Description Process
F.MRS
F.MCVS
F.MCS = F.702
Communication Capabilities :
MSEs
Comm.
Tasks
Generic
Multimedia
Services
Media
Comp.
F.MDS.1
F.MRS.1
F.MCV.1
F.MDS.2
F.MRS.2
F.MCV.2
F.MDS.3
F.MRS.3
F.MCV.3
F.MDS.4
F.MRS.4
F.MCV.4
F.MDS.5
F.MRS.5
F.MCV.5
F.MCS.3
F.MCS.4
F.MCS.5
H.310
H.324
H.324
H.323
Terminals or
End-points
H.247
N. A.
N. A.
H.332
Multipoint
H.245
H.245
H.245
In-band
Signalling
H.223
H.223
F.MCS.1
= F.731
F.MCS.2
= F.732
H.320
H.321
Technical Descriptions
27-28 May 2004
Service Descriptions
User perspective
Network Independent Recommendations
G.729
G.728
G.723
G.722
H.263
H.262
H.261
H.243
H.231
G.711
H.242
T.120
H.230
H.245
T.130
H.221
H.222.0
H.222.1
Multiplex
H.225.0
H.248
Protocols
Audio Coding
MSEs = middleware service elements
Video Coding
Q.931
Q.2931
Q.23
Q.---
ISDN
B-ISDN
PSTN
Mobiles
Call Control
Packets
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Other IP related resources
o IP Policy Manual
see itu.int/ITU-T/special-projects/ip-policy
o PP-02 Resolution 102
o ITU-T Workshops
see itu.int/ITU-T/worksem
o ITU-T and ICANN reform
see itu.int/ITU-T/tsb-director/itut-icann
27-28 May 2004
34