Raj Pandya. Chairman, ITU-T WP3/11. (Signaling Requirements for Mobility
Services). Contributions: GSC(99)-15/RAST(99)-37. GSC5/RAST8, Williamsburg
...
Progress and Plans for IMT-2000 Standardization in ITU-T Raj Pandya Chairman, ITU-T WP3/11 (Signaling Requirements for Mobility Services)
Contributions: GSC(99)-15/RAST(99)-37
GSC5/RAST8, Williamsburg, August 23-26, 1999
Pandya: ##
IMT-2000: ITU Standardization Activity
IMT-2000 Standardization
Radio Communications
ITU-R
ITU-T
Telecom. Standards Lead SG on IMT-2000
Terrestrial Mobile
IMT-2000 Radio Aspects
SG8
TG8/1 Chairman: M. Callendar
SG11
Signaling & Protocols
WP3/11 IMTT-2000 Signaling Requirements Chairman: R. Pandya
Other IMT-2000 Activities in ITU-T • Services (SG2) • Numbering & Identities (SG2) • OAM (SG4) • Security (SG7) • Interworking (SG13) • Speech & Video coding (SG16)
GSC5/RAST8, Williamsburg, August 23-26, 1999
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ITU-T SG11 Structure forIMT-2000 standards
Study Group11
ITU-R and External fora
IMT-2000 Program Manager
WPs of SG11 and other ITU-T SGs
R. Pandya JQGs*
WP3/11 IMT-2000 Signaling Requirements
IMT-2000 Protocol Choices
Functional Architecture Radio Interface Network Interface
Radio Interface (L2) Service Control Mobility Management Call/Bearer Control
Protocol Groups
Management (with SG4) Security (with SG7)
* JQG: Joint Question Groups
IMT-2000 Interface & Protocol Specifications
GSC5/RAST8, Williamsburg, August 23-26, 1999
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Recent Developments
Joint Experts Meeting of TG8/1 and SG11 (Beijing) - Agreements • IMT.RSPC to reference 3GPP/SDO Specifications on RTTs • SG11 will develop a common mechanism for IMT-2000 Terminals to recognize radio and network operating environments • SG11 (with SG4 & SG7) will review radio technology independent parts of RTT specifications related to signaling, management, & security. • Request inputs from 3GPPs/SDOs on RTTs requested by September 1 (Annex 1) • Target completion for Common NNI for interworking of family system networks agreed for year-end 2000.
GSC5/RAST8, Williamsburg, August 23-26, 1999
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Key Deliverables - continued Studies/Recommendations targeted for completion in 1999 Review of radio-independent part of RTTs to be included in IMT-RSPC - SG11 - technical assessment of radio-independent aspects of layer 2 and layer 3 RTT specs Common mechanism for a terminal to select radio and/or network environment - SG11 - required terminal capability for roaming across different ‘family member’ networks Q.1721: Information Flows for IMT-2000 (Stage 2 service description)-SG11 - will form the basis for signaling protocols and interface specifications for common NNI - includes IFs, IEs, FEAs etc. for support of Packet data and inter-working with Internet Q.1731-2: Signaling Requirements for Radio Interface - Layer 2 - SG11 - radio-independent services and functions for Layer 2 of the radio interface Q.1741: Functional Specs. and Requirements for IMT-2000 UIM - SG11 - requirements for the design of IMT-2000 UIM and UIM-MT interface GSC5/RAST8, Williamsburg, August 23-26, 1999
Pandya: ##
Key Deliverables - continued Studies/Recommendations targeted for completion in 1999 Review of radio-independent part of RTTs to be included in IMT-RSPC - SG11 - technical assessment of radio-independent aspects of layer 2 and layer 3 RTT specs Common mechanism for a terminal to select radio and/or network environment - SG11 - required terminal capability for roaming across different ‘family member’ networks Q.1721: Information Flows for IMT-2000 (Stage 2 service description)-SG11 - will form the basis for signaling protocols and interface specifications for common NNI - includes IFs, IEs, FEAs etc. for support of Packet data and inter-working with Internet Q.1731-2: Signaling Requirements for Radio Interface - Layer 2 - SG11 - radio-independent services and functions for Layer 2 of the radio interface Q.1741: Functional Specs. and Requirements for IMT-2000 UIM - SG11 - requirements for the design of IMT-2000 UIM and UIM-MT interface GSC5/RAST8, Williamsburg, August 23-26, 1999
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IMT-2000 and Global Roaming: Potential Areas for collaboration
GSC5/RAST8, Williamsburg, August 23-26, 1999
Pandya: ##
IMT-2000: Emerging View
• Multiple Frequency Bands (2G use of IMT-2000 band) • Multiple Radio Technologies (IMT.RSPC - ITU-R) • Multiple Core Networks (Q.1701 - ITU-T)
Multi-band/Multi-mode Terminals roaming between Family Member Networks supporting different access & network protocols GSC5/RAST8, Williamsburg, August 23-26, 1999
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IMT-2000: Global Roaming
Key Requirements • Roaming Terminal should be able to operate in the visited network Need a common mechanism(protocol) to allow the terminal to recognize the Radio and Network environment (of visited system)
• Visited Network should be able to inter-operate with the Home Network Need an interworking mechanism (protocol) for different family system networks to communicate with each other
GSC5/RAST8, Williamsburg, August 23-26, 1999
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Network Interworking Options
• Interworking using bi-lateral IWFs (3GPPs/SDOs) • Interworking using a Common NNI (ITU-T + 3GPPs/SDOs) • Unified Networks: Single networking prtotocol (ITU-T + ) Unified Networks Common NNI Bilateral IWF
near-term
medium-term
GSC5/RAST8, Williamsburg, August 23-26, 1999
long-term Pandya: ##
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Network Interworking Option 1 Interworking using bi-lateral IWFs • An ad-hoc solution for early implementation • Inefficien if more than 2 family systems: n(n-1)/2 IWFs required • Change in one NP invokes changes in all interconnected networks
NP-A
A
B
IWF
IWF
NP-C
NP-B
IWF
C
GSC5/RAST8, Williamsburg, August 23-26, 1999
Pandya: ##
Network Interworking Option 2 Interworking using a Common NNI • Family-specific IWFs to Common NNI • Efficient: one IWF design per Family • Change in one NP/IWF does not affect other IWFs • More future-proof (can accomodate new family members)
C
NP-C
IWF
NP-A
A
IWF
GSC5/RAST8, Williamsburg, August 23-26, 1999
Common NNI
IWF
B
NP-B
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Common NNI: Proposed Protocol Suite
Common NNI • Call/Bearer Control- Circuit: N-ISUP/B-ISUP • Bearer/Network Layer - Packet: ATM AAL5/IP • Service Control: ITU-T INAP + mobility extensions - functional commonality with WIN & CAMEL • Mobiliity Management: New Protocol -functional commonality with GSM and IS-41 MAPs - ITU-T TCAP transport GSC5/RAST8, Williamsburg, August 23-26, 1999
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Global Roaming: Proposed Way Forward
Task
Collaborative Approach
• Mechanism for terminals to recognize operating radio & network environments
• ITU-T/R in close collaboration with 3GPPs and appropriate SDOs
• Interworking between GSM and ANSI-41 networking protocols for early implementations
• Collaboration between 3GPPs and appropriate SDOs
• Common NNI protocol suite for interworking of current and future IMT-2000 family systems
• ITU-T in close collaboration with 3GPPs and appropriate SDOs
• Initial studies towards a ‘Unified Network’ to support evolving telecommunication services
• ITU-T with inputs from 3GPPs and appropriate SDOs
GSC5/RAST8, Williamsburg, August 23-26, 1999
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Future Directions and Plans
- Consolidation of IMT-2000 network-related standardization work in a single group - Maintaining ITU’s role as the pre-eminent forum for international standards - Continued collaboration with relevant external forums to meet industry needs - Increased focus on support of high speed data, Internet and multimedia services - Developing architectures and protocols for unified (wireless/wireline), IP-centric networks;
collaborate! - collaborate! - collaborate! www.itu.int/imt/ GSC5/RAST8, Williamsburg, August 23-26, 1999
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