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Next Generation Networks (NGN) 2004 Project

Summary of actions (2001 - 2004 study period)

During its January 2002 meeting, SG13 decided to undertake the preparation of a new ITU-T Project entitled "NGN 2004 Project". At the November 2002 SG13 meeting, a preliminary description of the Project was achieved and endorsed by SG13 with the goal to launch the Project. It has been regularly updated since then (refer to the NGN 2004 Project description above)

The role of the NGN 2004 Project was to organize and to coordinate ITU-T activities on Next Generation Networks. Its target is to produce a first set of Recommendations on NGN by the end of the study period, i.e. mid-2004. 

The first two Recommendations Y.2001 “General overview of NGN” and Y.2011 “General principles and general reference model for next generation networks” have since been approved.

Scope of the NGN 2004 Project

The NGN 2004 Project was seen as a realization of the concepts adopted in the Global Information Infrastructure (GII). As a result, activities in the frame of the new Project were in line with existing GII Recommendations (Y series). The intention of the NGN 2004 Project was to establish implementation guidelines and standards for the realization of Next Generation Networks based on GII concepts.

The major task of the NGN 2004 Project was to describe all elements required for interoperability and network capabilities to support applications globally across Next Generation Networks.


During the ITU-T Workshop on IP-networking and Mediacom 2004 held in Geneva in April 2001, a session was dedicated to the transition towards Next Generation Networks. Different views on NGNs were presented, however the final panel discussion revealed that it was difficult to reach a common understanding of what the NGN should be.

During the SG13 meeting in Caracas in May 2001, discussions took place on NGN matters however the subject was deemed not mature enough to initiate the preparation of an ITU-T Project on NGN.

At the SG13 meeting in January 2002, NGN issues were again addressed. In particular, discussions in Q.12/13 (now Q.1/13) (which dealt with Project coordination and management) focused on the relationship between the Global Information Infrastructure (GII) and Next Generation Networks. The common understanding has been that the NGN has to be seen as the concrete realization of concepts defined for the GII. In addition, a clear demand from the market for short-term standards in the field of NGN has been identified, which has led to the proposition of 2004 as the target date to prepare the first Recommendations on NGN. A series of Recommendation, including Y.GRM-NGN, General reference model for NGN, were under development in early 2004 with an objective of completion by June 2004. From the Recommendations identified below, the two first texts were completed and approved as Y.2001 and Y.2011, respectively.

Number Title
Y.NGN-Overview General overview of NGN
Y.GRM-NGN General principles and general reference model for Next Generation Networks
Y.NGN-FRM Functional architecture model (ex-Functional requirements and architecture of the NGN)
Y.NGN-SRQ NGN service requirements
Y.NGN-MOB Mobility management requirements and architecture for NGN
Y.NGN-MAN Framework for manageable IP network
Y.NGN-MIG Migration of networks (including TDM networks) to NGN
Y.NGN-CONV Regulatory consideration of the NGN
Y.e2eqos End-to-end QoS architecture for IP networks evolving into NGN
Y.123.qos A QoS architecture for Ethernet-based IP access network
Y.NGN-TERM Next Generation Networks terminology: Terms and definitions

Current Status

All the draft NGN-related Recommendations initiated by SG 13 were transferred to the Focus Group on NGN (FGNGN) in June 2004. See for details.

As a consequence the NGN 2004 Project was frozen. Study Group 13 is now working on an NGN Project coordination and release planning which have taken further steps following the December 2004 and April-May 2005 SG 13 meetings. A first version of the NGN release 1 description and an informative NGN roadmap pointing to releases beyond release 1 have been developed. The work will be supported by an NGN project management tool acting as umbrella for all referenced documents from ITU and other SDOs. This tool has been specified and agreed for development and implementation. It is expected to be operational by September 2005.

The NGN Project coordination and release planning is maintained by Q.1/13.



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Updated : 2005-11-28