IMS Evolution and Alignment Workshop

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The Path to ConvergenceIP Multimedia Subsystem

• Timothy Jeffries
• Vice President,
• Technology Development
• ATIS
• 202.662.8669
• tjeffries_at_atis.org

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IP Multimedia Subsystem (IMS) Enabling
Services to Cross the Chasm Between Wireline and
Wireless Worlds

• As service providers migrate to next generation
  networks (NGN) and deploy a mix of access network
  technologies, service continuity between these
  multiple access networks must be enabled.
• Since 2003, ATIS has supported the development of
  a globally accepted common set of IP Multimedia
  Subsystem (IMS) specifications to enable service
  continuity, as part of the industrys adopted
  path towards NGN and convergence.

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ATIS Endorsement of IMSDelivery of Any
Service, Anytime, Anywhere on Any Access
Technology

• Based on the adoption of IMS by multiple industry
  sectors (stakeholders), requirements beyond
  those traditionally contemplated as part of the
  IMS-core are emerging.
• Inside ATIS, a number of technical groups have
  launched work to assess and address these
  requirements for IMS.
• In May 2006, the TOPS Council commissioned the
  formation of an Exploratory Group on Convergence
  (EGC) to study the various aspects of convergence
  including IMS e.g., requirements, architecture
  and signaling to ensure a consistent approach to
  a converged NGN.

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Standardization of IMSMultidimensional Aspects
Behind a Single IMS Solution

• Driven largely by the broad adoption of IMS,
  interest and activities within ATIS and its
  technical committees are intensifying
• Wireless Technology System Committee (WTSC)
• Telecom Management Operations Committee (TMOC)
• Packet Technology System Committee (PTSC)
• Emergency Services Interconnection Forum (ESIF)
• IPTV Interoperability Forum (IIF)
• Others are watching with great interest
  support

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Operations, Provisioning Admin. Aspects
Telecom Management Operations Committee (TMOC)
Wireless, Services and Mobile Aspects Wireless
Technology System Committee (WTSC)

• At Present Future Plans
• WTSC has been involved in the 3GPP since its
  establishment in 1998, and actively supports and
  contributes to the development of 3GPP
  specifications, including IMS.

• At Present
• working on a number of VoIP and NGN related
  Issues
• specific to IMS is an Issue 58, Sub-Item on NGN
  Accounting Management
• NGN Accounting Management is being worked within
  the ITU-T
• A key part is harmonization with 3GPP Accounting
  Management (charging)

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Service, Signaling Architecture Aspects Packet
Technology System Committee (PTSC)

• At Present
• 36 active issue statements of which 25 deal
  directly with the development of NGN, including
  development of IMS as a base platform and
  convergence topics
• working on service continuity across access
  networks - directly related to convergence
• developing the NNI, UNI, and ANI interfaces for
  carrier interconnect
• The ANI being the newest interface dealing with
  interconnection with the Application Servers
  where the services are based.
• This could be a significant enabler for service
  convergence.
• developing Emergency Telecommunication Service
  (ETS), Operator Services, Directory Assistance,
  LAES, and E9-1-1 capabilities for NGN and IMS
  (based on U.S. Requirements)

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Service, Signaling Architecture Aspects Packet
Technology System Committee (PTSC)

• Future/Current Plans
• identifying IMS extensions and enhancements,
  based on the 3GPP IMS specifications, and
  developing associated standards as appropriate
• coordinating with relevant groups on IMS-related
  requirements pertaining to emergency services and
  NGN-type services, e.g., IPTV from a
  signaling/architectural perspective
• working on NGN architecture focused on ITU-T
  development
• NGN development in the ITU-T (treaty
  recommendations) will develop global agreements
  needed to enable convergence
• developing Session Border Control for
  interconnection
• developing ETS IMS Network Element Requirements

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Emergency Services Aspects Emergency Services
Interconnection Forum (ESIF)

• At Present
• established its Next Generation Emergency
  Services Sub-Committee to focus on the migration
  to an IMS based NG-ES system
• developing location acquisition and parameter
  conveyance
• focused on IP-based E9-1-1 calls without valid
  callback numbers
• evaluating standards/approach for an IMS-based
  Emergency Services Network
• IMS Standard focuses on originating network
• Assumes delivery directly to the emergency call
  center (PSAP)

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Emergency Services Aspects Emergency Services
Interconnection Forum (ESIF)

• Future Plans
• develop a transition plan launch work around
  issues relevant to transiting from legacy systems
  to IMS
• identify address gaps in IMS standards
  activities to transition to an IMS-based
  emergency services system
• standard architecture based on the IMS/NGN
  standards
• coordinate joint reviews on NG Emergency Services
  for a global standard coordination effort between
  NG9-1-1 (North America) and NG1-1-2 (European
  Union) emergency services initiatives
• advocate a specific work project to address
  IMS-based Emergency Services Network within 3GPP
  Release 8
• prompt consideration that affect emergency
  communications, such as the E9-1-1 service, in
  future development of devices and new services
  offerings (WiFi WiMAX)

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IPTV System Services Aspects IPTV
Interoperability Forum (IIF)

• At Present
• working on specifications and standards
  pertaining to requirements for architecture,
  interoperability, content delivery and security
• Future Plans
• work on IPTV specifications and standards
  utilizing IMS

Overarching Aspects ATIS Board of Directors
Development of IMS specifications inclusive of
requirements from diverse stakeholders will be
critical to ensure a minimum level of
interoperability across multiple independent
IMS-based networks.
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IMS HarmonizationIMS is Greater Than the Sum
of its Parts

• Next Steps to Advance IMS
• identify issues of importance across ATIS
  multiple committees and develop solutions, as
  needed
• coordinate and communicate with industry standard
  groups to achieve an implementable interoperable
  NGN to include its many subsystems e.g., IMS
• advocate and promote a single global approach to
  IMS
• advance the 3GPP, as an Organizational Partner,
  to meet industrys many needs

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Questions Answers
Additional Information on ATIS, the work programs
of its technical and operational committees, and
other initiatives are available at www.atis.org
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Additional Details Regarding Ongoing Activities
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PTSC Issues Involving IMS Items of particular
reference to IMS and convergence.

• S0002 LAES for Public IP Network Access Services
• S0003 Create a Security Roadmap Standard
• S0005 Create an SS7/BICC Network NNI
  Interconnection Security Standard
• S0006 Create a VoP/Multimedia Control and
  Signaling Standard
• S0007 Create a UNI Access and Signaling Security
  Standard
• S0008 IP-IP Network Interconnect Testing for VoIP
  
• S0010 Create an Addendum to T1.679
• S0014 Support of Operator Services in an IP
  Environment
• S0018 NGN Architecture Technical Report
• S0019 IP QoS/RACS Technical Report
• S0021 Operator Services Architecture and
  Interfaces
• S0022 LAES of NGNs
• S0023 Vertical Signaling Interface to Communicate
  QoS and Reliability/Priority Parameters
• S0024 Session/Border Control Function Definition
  and Requirements
• S0025 NNI Numbering and Routing Capabilities and
  Procedures
• S0026 SIP History-Info
• S0027 IP Device (SIP UA) to Network Interface
  Standard
• S0028 US Standard For IP-IP Network
  Interconnection - Roadmap Standard

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PTSC Issues Involving IMS Contd

• S0029 An Interworking Standard to Support ANSI
  Extensions to NSS
• S0030 Signaling to Support Call Admission Control
  and Traffic Management
• S0031 Packet Priority and Priority Call
  Processing
• S0032 Minimum Security Mechanisms for Messaging
  Applications
• S0033 End to End User Authentication and
  Signaling Security
• S0035 LAES Guidelines
• S0036 Alignment of T1.607-2000 (R2004), with
  ITU-T Q.931 for V.32 and V.34 Modem Types
• S0037 Support for LAES of Advanced VoP
  Conferencing
• S0038 NGN 9-1-1 Service
• S0039 Packet Priority and Priority Call
  Processing - Phase 2
• S0040 IP-NNI for VoIP and Multimedia Services in
  NGN
• S0041 Support of Emergency Telecommunication
  Services in IP Networks Phase 2
• S0042 ISUP Code Point Assignment Guidelines
• S0043 ETS Phase 1 Network Element Requirements
• S0044 Service Continuity Between Access Networks
  
• S0045 Service Requirements for ETS in NGN
• S0046 ATIS NGN Security Requirements
• S0047 Create a Supplement to ATIS-1000678-2006,
  LAES for VoP in Wireline Networks

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ESIF NG-Emergency Services Sub-Committee

• Mission
• Provide liaisons with global standards groups for
  emergency services standards
• Coordinate emergency services needs within ATIS
  externally with other global groups
• Develop emergency services standards with ATIS
  and for North America
• Current Activities
• Location Acquisition and Parameter Conveyance
  ATIS Technical Report for Liaison with Global
  SDOs
• IP-Based E911 Calls Without Valid Callback
  Number ATIS Technical Report

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ESIF Issues and Considerations Involving IMS

• Considerations for the transition to an IMS based
  emergency services system include the following
  to address gaps in IMS standards activities
• Support of NENA i2 Architecture in 3GPP TS 23.167
  
• Support of interworking between pre-IMS and IMS
  ES
• Location update for Legacy IP-CAN with IMS core
  network
• Co-existence of Legacy and IMS-capable PSAPs
• Specific work is needed to consider transitions
  from Legacy to IMS
• NENA is starting a technical committee to define
  these requirements
• Specific work is needed to address IMS-based
  Emergency Services Networks
• 3GPP is asked to consider the inclusion of such
  in Release 8