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ITU-T Study Group 19 - Question 3/19 (Study Period 2005-2008)

>> Study Group 19 : Mobile telecommunication networks
Question 3/19

Identification of existing and evolving IMT-2000 systems

  1. Motivation

    IMT-2000 is the most important ITU initiative spanning all three sectors. The identification of the architecture and detailed specifications of the existing IMT-2000 family members is essential to be able to specify those functions required to facilitate understanding of these family members and establish migration from existing pre-IMT-2000 to IMT-2000 family members and towards systems beyond IMT-2000.

    Since the existing IMT-2000 systems are being standardised by a number of SDOs in Partnership Projects, the reason for this question, is to identify which specifications as approved by the SDO’s (recognized by ITU-T according to A series recommendations) are necessary to realize IMT-2000 system, and where they apply to the overall architecture of the IMT-2000 family members.

    As the SDO’s continue to develop various releases of their systems, new recommendations will need to be produced to reflect the releases of these systems.

    This Question shall be responsible for the Q.174x series of recommendations.

  2. Question

    Study items to be considered include, but are not limited to:

    What architectures, detailed specifications and releases have been and will be produced by recognized SDO’s which make up existing and evolving IMT-2000 systems?

  3. Tasks

    Tasks include, but are not limited to:

    Develop recommendations identifying the architecture and detailed specifications of each release (version) of each IMT-2000 family member making reference to relevant specifications produced by the ITU-T recognised SDO’s.

    Recommendations shall be produced for the following existing and evolving IMT-2000 family members:

    GSM evolved UMTS core network with UTRAN/GERAN access network,

    ANSI-41 evolved core network with cdma2000 access network.

    An up-to-date status of work under this Question is contained in the SG 19 Work Program (

  4. Relationships



    Study Groups: ITU-R – Mobile, radiodetermination, amateur and radio related satellite services

    Standardisation bodies: 3GPP, 3GPP2, ARIB, CCSA, ETSI, T1, TIA, TTA, TTC


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