ITU-T IP Related Studies
Arshey Odedra
ITU-T TSB Engineer: arshey.odedra@itu.int
International Telecommunication Union
[ITU-T Seminar Botswana 24-26 July – 2002]
ITU-T IP Related Studies
• (1) ITU-T IP Project
• (2) ) ITU-T SG11Signalling & IP activities
(3)IP Cable Communications
• (4)IP-QoS/Performance
• (5)IP-Optical Perfce
• (6)Numbering
• (7)IP and Security
• (8)Multimedia (MM)
(1) The ITU-T IP Project
• ‘ITU-T IP Project’ Cover IP related ITU-T
work
• Project Doc Issue 4: SG13 Website
Scope of the 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 15
and 16
Network Capabilities Qs 1, 2, and 3/13, SG 9
11
Interworking – Q5/13, SG16 and SSG
3
IP Performance - Q 6/13, SGs 2 and 12
8
IP Transport – Qs10/13, 16/13, SG 15
IP and
non-IP
Access Qs 12/13,
14/13,
SGs 15
and 16
2
6
Management - SG 4, 6/SSG, 4/15, 3/16
9
Naming, Numbering, Addressing and Routing - SG 2
5
1
Overall Network Architecture and Framework - Qs 1, 11, 14 and16/13
Operational Issues - SGs 2, 3, and 7
= Work area
12
7
10
SG13 IP Work
• Y.1231 - IP Access Network Architecture
• Y.1310 - Transport of IP over ATM in public
networks
• Y.1401 - General requirements for
interworking with IP-based Networks
• Y.1241 - Support of IP-based services using
IP transfer capabilities
SG13 IP work
• Y.17oam - OAM and protection switching for IPbased networks
• Y.1540 - IP packet transfer and availability
performance parameters
• Y.1541 - IP performance objectives and allocations
• Y.1311 - IP VPN
• Y.1311.1 - IP VPN over MPLS
• Y.satip - Satellite IP networking architecture
• Y.123qos - IP access quality of service
• Y.ipbypass - IP bypass in access networks
SG13 Future Plans
• SGs continue to build links with the IETF
• SG13 develop and manage the IP Project
(2) ITU-T SG11Signalling & IP
activities
• SCOPE:
• 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
• Lead Study Group for IN
ITU-T SG11 Current work focus:
• Interactions between IN and IP-based networks
• IP-related signalling protocols
• Bearer (ATM, IP) Independent Call Control (i.e. BICC)
• Signalling transport over IP
SS7 Convergence towards Packet
based Networks
- Intelligent Network architecture and protocols
enhanced
- For Call control signalling, Bearer Independent
Call Control (BICC) protocols - over Packet
based transport networks
– BICC Recs approved (2000 & 2001).
– BICC CS3 Recs approval target: 2003.
(3) IP Cable Communnications
• IPCablecom (SG9)
• Defines architecture and interface specs
 interactive services over cable
television network using IP
• Market driver: IP telephony
IPCablecom Service Possibilities
•
•
•
•
•
Residential/ Business IP Telephony
Video IP telephony
Voice/data/video unified messaging
Enhanced conferencing and media services
Entertainment Services
Real-time multiplayer interactive gaming
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
Back Office
Servers
IPCablecom Recs. for interoperability
intra-zone and with PSTN
A set of recommendations approved (2001/2002)
Architecture
J.160 Architecture
Signaling
Media/Codecs
J.161 Audio Codec
Requirements.
OSS
J.162 Network Call
Signalling
J.164 Event Messaging
J.165 IPCablecom Signalling
J.166 MIB Framework
Transport Protocol
J.167 MTA Provisioning
J.171 Trunk Gateway Control
J.168 MTA MIB
Protocol
J.169 NCS MIB
Quality of Service
J.163 Dynamic QoS
Security
J.170 (02/02) Security
IPCablecom Recs. for interoperability
inter-zone and inter-domain directly over
managed IP backbones
Quality of Service
J.174 (02/02)Interdomain QoS
Security
J.170 (02/02) Security
Architecture
For further study
Signaling
For further study
OSS
J.164 (03/01) Event
Messaging
(4)IP-QoS/Performance
•QoS Classes :
Basis for IP Network QoS Control
•IP QoS control: IP/PSTN network convergence
•Y.1541(05/2002)
•Y.1540=I.380
• QoS signaling protocols  Y.1541
QoS
Parameters
ITU-T SG12/16
User Perceived QoS
SERVICE
ITU-T SG16/11
Codec Performance, VAD, Frames per Packet,
Jitter Buffer Size,Codec Delay, FEC (Redundancy)
APPLICATION
ITU-T SG13/IETF
Max Packet Loss, Max Mean Delay, Max Delay VariationTRANSPORT
Some Discussion topics on IP
Network QoS Control
• Harmonised IP QoS signaling
• Interworking IP QoS mechanisms
(5) IP-Optical Network &
Performance Aspects
• IP-Optical Networks: Motivation
- Infrastructure Attributes
- Capabilities
- Operational Benefits
IP/Optical Networks:
Performance Benefits & Challenges
• Performance Benefits
–
–
–
–
Increased transmission capacity
Reduced packet transfer delay, delay variation, loss, error
Lower call set up delays and blocking probabilities
Improved service availability
• Some Challenges
– Specify interoperable performance signaling protocols
– Relate IP user/client requirements with control mechanisms
– Define compatible network management strategies
IPPM and Question 6/13
• New RFCs
– Loss Patterns
– Bulk Transfer Capacity
• Current (IETF) Drafts
– Packet Reordering
– Active Meas. Protocol Req.
– IPPM MIB
• New Work on
– Link Bandwidth Capacity
• Performance Objectives
– Y.1541 (May 2002), six
QoS Classes
• Suggest QoS Signaling
Support/Methods
• Parameter Revisions
– Y.1540 (Nov 2002)
• “other” Packet Transfer
– MPLS?
(6) Numbering
• 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: (target E.A-ENUM, Dec. 2002?)
(7)IP and Security
Directory Access Control with X.509 Attribute
Certificates:
• The user given Attribute Certificate (AC) which
strongly binds his/her name to the privileges being
given to him/her
• The AC is signed by the Attribute Authority (Resource
Owner or his delegate)
• Similar to X.509v3 certificate, only holds a sequence
of attributes rather than a public key
• An attribute certificate can be stored anywhere since it
is secure and self contained
Standardisation Work of
Q.9/17
•
•
•
•
•
Friends attributes in X.501, X.511
Distributed page results service in X.518
Related Entries in X.501, X.511, X.518
Alignment with IETF standards
Defect reports in entire X.500-series
SSG Role on Security
• Q.3/SSG Identification of existing and evolving
IMT-2000 Systems
– Q.1741 3GPP security specifications
• Q.1/SSG
Service and network capability requirements and
network architecture
• & Q.7/SSG
Convergence of fixed and existing IMT-2000
systems
Study Group 16 - Security-related
Qs 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
H.245
H.246
H.248
Q.5/16
Mobility
for MM
Systems
&
Services
H.501
H.510
H.530
Q.G/16 Work and Study Items
Some Highlights
• Investigate confidentiality and privacy of all
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 develope new security profiles
• Security interworking H.323-SIP
Emergency Telecoms Services (ETS)
Security for MM Applications and Systems
• 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
• H.SETS : provisional title for a new work item
under study in Q.G/16 - focus on the
multimedia security aspects of ETS
(8)Multimedia (MM)
ITU-T Study Group 16 Project: MediaCom 2004
Objective:
• 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
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
Framework Study Areas (FSA)
• Project MediaCom 2004
(A/16)
• MM Architecture
(B/16)
• MM Applications and Services
• Interoperability of MM Systems and Services
• Media Coding
• QoS & E-to-E performance in MM Systems
• Security of MM Systems and Services
• Accessibility
(C/16)
(D/16)
(E/16)
(F/16)
(G/16)
(H/16)
MM Element Interdependence
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.4
F.MCS.5
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.310
F.MCS.3
H.321
Technical Descriptions
Equipment/protocol perspective
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
GENEVA
THANK YOU
33