3GPP IMS Standardization Update - PowerPoint PPT Presentation


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3GPP IMS Standardization Update


3GPP IMS Standardization Update Lucent Technologies Bell Labs Innovations Lucent Technologies Room 9C-229 1960 Lucent Ln. Naperville, IL 60566 E Mail ttowle_at_lucent.com – PowerPoint PPT presentation

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Title: 3GPP IMS Standardization Update

3GPP IMS Standardization Update
Presentation Overview
  • Status of IMS Release 5
  • List of Specifications/owners
  • Development status
  • Content of Release 6 (IMS related work)
  • List of work areas/owners
  • Update on current status
  • Guess at schedule
  • IMS Commonality Interoperability
  • What is included
  • How topic is being addressed
  • WLAN Interworking
  • 3GPP Interworking scenarios
  • Current Status

IMS R5 Core Specifications
  • IMS Stage-2/3
  • 3GPP TS 23.218 IP Multimedia (IM) session
    handling IM call model (CN1)
  • 3GPP TS 23.228 IP Multimedia Subsystem (IMS)
    Stage 2 (SA2)
  • 3GPP TS 24.229 IP Multimedia Call Control
    Protocol based on SIP and SDP Stage 3 (CN1)
  • 3GPP TS 29.228 IP Multimedia (IM) Subsystem Cx
    Interface Signalling flows and message contents
  • 3GPP TS 29.229 Cx Interface based on the
    Diameter protocol Protocol details (CN4)
  • 3GPP TS 29.328 IP Multimedia Subsystem (IMS) Sh
    Interface Signalling flows and message contents
  • 3GPP TS 29.329 Sh interface based on the
    Diameter protocol Protocol details (CN4)

IMS R5 Supporting Specifications
  • 3GPP requirements and architecture for IMS
  • 3GPP TS 22.228 IP multimedia subsystem Stage 1
  • 3GPP TS 23.002 Network Architecture (SA2)
  • 3GPP TS 23.003 Numbering, addressing, and
    identification (CN4)
  • 3GPP TS 23.008 Organization of subscriber data
  • 3GPP TS 23.221 Architectural requirements (SA2)
  • 3GPP TS 27.060 Mobile Station (MS) supporting
    Packet Switched Services (CN3)
  • 3GPP QoS management and Service Based Local
    Policy for IMS
  • 3GPP TS 23.207 End-to-end QoS Concepts and
    Architecture (SA2)
  • 3GPP TS 29.207 Policy Control over Go Interface
  • 3GPP TS 29.208 End-to-end Quality of Service
    (QoS) signalling flows (CN3)

IMS R5 Supporting Specifications (Continued)
  • 3GPP Charging and Billing for IMS
  • 3GPP TS 32.200 Telecommunications management
    Charging management Charging principles (SA5)
  • 3GPP TS 32.225 Telecommunications management
    Charging management Charging data description
    for the IMS domain (SA5)
  • 3GPP Security for IMS
  • 3GPP TS 33.203 3G security Access security for
    IP-based services (SA3)
  • 3GPP TS 33.210 3G security Network Domain
    Security (NDS) IP network layer security (SA3)
  • UMTS/GPRS related procedures for IMS
  • 3GPP TS 24.228 Signalling flows for the IP
    multimedia call control based on SIP and SDP
    Stage 3 (CN1)
  • CAMEL Support for IMS
  • 3GPP TS 23.278 Customised Applications for
    Mobile network Enhanced Logic (CAMEL) - IP
    Multimedia System (IMS) interworking Stage 2
  • 3GPP TS 29.278 Customised Applications for
    Mobile network Enhanced Logic (CAMEL) CAMEL
    Application Part (CAP) specification for IP
    Multimedia Subsystems (IMS)

Status of Release 5 IMS Specifications
  • All specifications frozen as of September 2002
  • Support for basic IMS operation
  • Support for various SIP methods including
  • Support for fundamental capabilities including
    Authentication/Authorization, MO/MT sessions,
    Service Based Local Policy, Charging, etc.
  • Not complete in areas of Interworking with
    PSTN/Internet, MGW/MRFP control, Emergency
    Services, and some others.
  • Level of Change Requests
  • Low for most as of January 2003
  • Moderate activity in IMS Charging Stage-3 in
    March 2003
  • Expect high activity in IMS SIP Stage-3 till June

Work Areas for Release 6 - IMS Core Related
  • Commonality and Interoperability support for
    use of the IMS core by other access technologies
    (SA2, CN1)
  • IMS Local Services support for access to
    services in visited network (SA2, CN1)
  • IMS to PS Interworking support for interworking
    with IP endpoints including IPv4/IPv6
    interworking, SIP, transcoding, (CN3)
  • IMS to CS Interworking support for SIP/ISUP
    interworking and CS roaming scenarios (CN3)
  • IMS Conferencing support for IMS based
    conference provision and control (SA2, CN1)
  • SIP Capabilities Enhancements support for
    enhanced SIP capabilities such as forking (SA2,
  • IMS Subscriptions and Access Scenarios
    requirements on various operator scenarios for
    IMS deployment (SA1)

Work Areas for Release 6 Other IMS Related
  • Packet Based Emergency Services support for
    emergency service access via packet networks
    (SA1, SA2, CN1)
  • QoS and Service Based Local Policy Enhancements
    support for Gq interface and non-IMS applications
    (SA2, CN3)
  • IMS Group Management support for group-enabled
    services e.g., chat (SA1, SA2, CN1)
  • IMS Messaging support for immediate and session
    based messaging (SA1, SA2, CN1)
  • Bearer Level Charging support for IP flow based
    accounting (SA2, SA5)
  • WLAN Interworking support for WLAN (SA1, SA2,
    SA3, CN1, CN4)
  • Presence Capability support for presence (SA1,
    SA2, CN1)
  • Generic User Profile support for user data
    management (SA1, SA2, CN4, T2)

Status of Release 6 IMS Related Work
  • Stage-1 CRs mostly complete (SA1)
  • Initial work on IMS Subscriptions and Access
  • Stage-2 Documents or CRs in progress (SA2)
  • Commonality Interoperability 23.228 re-org
    agreed, additional work on TR in progress (June)
  • Some CRs received on local services, messaging,
    conferencing, Group Management and SIP
    enhancements (June)
  • Emergency services being worked in separate TR
    expect CRs in May (June)
  • QoS and SBLP study in progress, CRs later (Sept.)
  • Bearer charging TR in progress (Sept.)
  • Presence capability (mostly stable)
  • Generic User Profile (June)
  • WLAN Interworking (June)
  • Stage-3 Documents or CRs (some) waiting for
    Stage-2 stability
  • IMS Conferencing started, Presence in progress
  • CS and PS interworking in progress (CN3)
  • MGCF-MGW, MRFC-MRFP interfaces in progress (CN4)
  • Work plan currently targeted for YE-2003 freeze

IMS Commonality and Interoperability
  • What the work item includes
  • Improve commonality between IMS systems from
    3GPP, 3GPP2
  • Ensure users of 3GPP IMS can interoperate with
    others such as 3GPP2 MMD
  • How commonality is being addressed
  • Core set of specifications identified for common
    IMS (see slide 3) - complete
  • Generic terminology changes adopted - complete
  • PCF ? PDF
  • GPRS ? IP Connectivity Access Network
  • PDP Context ? IP-CAN Bearer
  • Documents restructured with Common IMS sections
    in process
  • Study report being developed to look into
    additional areas in process
  • Charging Billing
  • Security
  • Service based policy control
  • IMS Boundary reference points
  • IP Connectivity Access Network Requirements
  • Interoperability work is just getting underway

WLAN Interworking Scenarios
  • 6 Interworking Scenarios Identified
  • Scenario 1 Common billing and customer care
  • This is the simplest scheme of 3GPP -WLAN
    interworking. The connection between the WLAN and
    the 3GPP system is that there is a single
    customer relationship. The customer receives one
    bill and integrated customer care allows for a
    simplified service offering from both the
    operator and the subscribers perspective. The
    security level of the two systems may be
  • This scenario does not pose any new requirements
    on 3GPP.
  • Scenario 2 3GPP system based access control and
  • This is the scenario where authentication,
    authorization and accounting are provided by the
    3GPP system. This may also provide means for the
    operator to charge access in a consistent manner
    over the two platforms.
  • No requirements are put upon the set of services
    to be offered in the WLAN part beyond those
    inherently offered by being addressable in an IP
  • Scenario 3 Access to 3GPP system PS based
  • The goal of this scenario is to allow the
    operator to extend 3GPP system Packet Switching
    based services to the WLAN. These services may
    include, for example, IMS based services,
    location based services, instant messaging,
    presence based services.
  • a Service continuity between the 3GPP system part
    and the WLAN part is not required

WLAN Interworking Scenarios Continued
  • Scenario 4 Service continuity
  • The goal of this scenario is to allow the
    services supported in Scenario 3 to survive a
    change of access between WLAN and 3GPP systems.
    The change of access may be noticeable to the
    user, but there will be no need for the user to
    re-establish the service. There may be a change
    in service quality as a consequence of the
    transition between systems due to the varying
    capabilities and characteristics of the access
    technologies and their associated networks. It
    is also possible that some services may not
    survive, as the continuing network may not
    support an equivalent service.
  • Scenario 5 Seamless service provision
  • a The goal of this scenario is to provide
    seamless service continuity, as defined in
    between the access technologies, for the services
    supported in Scenario 3.
  • By seamless service continuity is meant
    minimizing aspects such as data loss and break
    time during the switch between access
  • Scenario 6 Access to 3GPP CS services
  • This scenario allows access to services provided
    by the entities of the 3GPP Circuit Switched Core
    Network over WLAN. This scenario does not imply
    any circuit-switched type of characteristics to
    be included into WLAN.

WLAN Interworking Status
  • Stage 1 Complete
  • Stage 2 for Scenario 2 complete
  • Target Release 6
  • Stage 2 for Scenario 3 in progress
  • Target Release 6
  • Stage 2 for Scenarios 4 and 5 in very early stage
    (Release 7)
  • Scenario 6 - No use cases have been identified,
    very low priority

Thank You
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