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Question 4/SSG - Interworking functions to be used with existing and evolving IMT-2000 systems

Reasons for the question

The ability to support appropriate (i.e., non commercial in nature) interworking between existing IMT-2000 systems (family members) is required.

Since existing and evolving IMT-2000 systems have been specified by the SDOs, the reason for this question is to identify functions which are required to facilitate interworking between the following:

- Between IMT-2000 family members,

- Between IMT-2000 family members and the PSTN/ISDN, and

- Between IMT-2000 family members and Packet Data networks.

The interworking between existing and evolving IMT-2000 systems will include the following functional levels:

  • Service Provisioning
  • Mobility Management
  • Session Control (e.g. call control), and
  • Bearer Control (e.g. circuit mode, packet mode)

As various releases of IMT-2000 family members continue to develop, new documentation will need to be produced to reflect the releases of these systems.

If any of this work is specified by SDOs, it shall be examined and referred to. It is not the intent of this question to duplicate effort already spent in the SDOs.

Question

What interworking functions are required to facilitate appropriate interworking between existing and evolving IMT-2000 family members, PSTN/ISDN and Packet Data networks?

Task objectives

The major focus of this question is to identify and specify the functions required to facilitate interworking between the existing and evolving IMT-2000 family member systems, the PSTN/ISDN and Packet Data Networks. The task objectives for the question are:

1) Identifying the functions required to facilitate appropriate interworking between the IMT-2000 family members developed by the SDOs, and document these in an appropriate manner for consideration by the Partnership Projects and SDOs, and other ITU-T SGs including SG11, as part of their long term network evolution plans. Reference should be made to those family members specified under question Q.3/SSG.

Expected Completion: appropriate agreed SSG deliverable within 12 month of systems being identified by Q.3/SSG. First deliverables agreed end 2002

2) Identifying the functions required to facilitate appropriate interworking between IMT-2000 family members developed by the SDOs and the PSTN/ISDN developed by Study Group 11, and document these in an appropriate manner for consideration by the Partnership Projects and SDOs, and other ITU-T SGs including SG11, as part of their long term network evolution plans. Reference should be made to those family members specified under question Q.3/SSG.

Expected Completion: appropriate agreed SSG deliverable within 12 month of systems being identified by Q.3/SSG. First deliverables agreed end 2002

3) Identifying and specifying the functions required to facilitate appropriate interworking between the IMT-2000 family members developed by the SDOs and Packet Data Networks developed e.g. by Study Group 7 and IETF, and document these in an appropriate manner for consideration by the Partnership Projects and SDOs, and other ITU-T SGs including SG11, as part of their long term network evolution plans. Reference should be to those family members specified under question Q.3/SSG.

Expected Completion: appropriate agreed SSG deliverable within 12 months of systems being identified by Q.3/SSG. First deliverable agreed end 2002.

Relationships

These activities will require close coordination with:

  • External organisations, such as SDOs, including IETF
  • ITU-T Study Group 2, 7, 11, 13 and others
  • ITU-T Special Study Group on "IMT-2000 and Beyond", Question "Identification of existing and evolving IMT-2000 systems" Q3/SSG,
  • ITU-T Special Study Group on "IMT-2000 and Beyond", Question "NNI Mobility Management Protocol (Stage 3)" Q2/SSG,
  • ITU-T Special Study Group on "IMT-2000 and Beyond", Question "To participate in the preparation of a handbook on IMT-2000" Q5/SSG,
  • ITU-R Working Party 8D, 8F.

 
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