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Question 5/13 – Principles and functional architecture for NGN (including ubiquitous networking)
(Continuation of Question 3/13)


The architectural integration of the formerly discrete packet-switched and circuit-switched networks into the NGN supporting various multimedia services requires extension of the architectural principles of both vertical and horizontal perspectives. In vertical aspect, more studies are required in service control and operation support areas to support various multimedia services over various environments. In horizontal aspects, the development of user friendly (or user-oriented) telecommunication capabilities are strongly required to take account of complex situations involving user environments (including home networks) and various access technologies which support convergence. These capabilities are necessary to support the future ubiquitous networking vision of NGN.

Personal and business services are giving rise to the notion of role-based services within an integrated package of services. NGN will require support for such advanced capabilities which can provide business and personal services to a given user. Features for the control and operation of these services by the user and the network will be required.

In addition, end user devices and end user networks like home networks are continuously improving to use services and network capabilities which become important factors for facilitating multimedia services.

To establish a set of common principles and architectures for the convergence among services and networks substantial studies and frameworks are required to:

  1. ensure interoperability of networks and applications;
  2. facilitate innovation in the use and application of industry capabilities;
  3. facilitate best utilization of the existing telecommunications infrastructure;
  4. facilitate mobility of users and devices.

Recommendations under responsibility of this Question include:

Y.1271, Y.1292, Y.1910, Y.2001, Y.2011, Y.2012, Y.2013, Y.2014, Y.2021, Y.2031 and Y.2205


What new and revised framework and/or architecture Recommendations are required to realize convergence based on the NGN, and to provide support for future ubiquitous networking?


  • General reference models of the NGN
    • Preparation of frameworks to identify the basic architectural compositions of the NGN, including support for ubiquitous networking. These will be based on the identification of architectural requirements in horizontal and vertical structures involved in providing telecommunication services in conjunction with an NGN environment.
    • This work will include maintenance of Recommendations Y.2011, Y.2012, Y.2021, Y.2031, Y.2014 and/or development of any new Recommendations deemed to be required. This will include development of models and functions taking consideration of various networking requirements for IPTV, RFID-based services, and connection to USN (ubiquitous sensor networks), home networks, etc.
  • Functional requirements and architectures for ubiquitous networking via NGN

    Identification of entities, their functions, and reference points, required to provide telecommunications services to support ubiquitous networking. This includes the need for functional reference models, taking into consideration key themes to support ubiquitous environments, and the addition of new functions and/or modification of existing functions. This analysis should include consider the impact on existing Recommendations and interworking cases. A set of preliminary considerations to be taken into account for this study is contained in the Appendix to this Question.
  • Reference model and functions for customer manageable and home networks

    Develop models and functions to allow customers to create, configure, customize, and otherwise customize the network services/resources allocated to them by the network provider, and to allow involvement of third parties in the development of network-supported applications.
    This will include development of models and functions for home networks taking consideration of various networking requirements such as RFIDs, USN (ubiquitous sensor networks), IPTV, etc.
  • Implementation framework related to provision of emergency telecommunications in next generation networks (including ubiquitous network environments)

    Identify the technical issues, measures, and functions of particular networking technologies that may be involved in meeting the requirements and capabilities of RecommendationY.1271, and develop any new Recommendations deemed to be required.
  • Maintenance of existing Recommendations

    Maintenance and/or enhancement of the following Recommendations are included:

      Y.1271 – Requirements and capabilities for emergency communications
      Y.2001 – General overview of NGN
      Y.2011 – General principles and general reference model for NGN
      Y.2012 – Functional requirements and architecture of the NGN
      Y.2013 – Converged services framework functional requirements and architecture
      Y.2014 – Network attachment control functions in Next Generation Networks
      Y.2021 – IMS for Next Generation Networks
      Y.2031 – PSTN/ISDN emulation architecture
      Draft Y.2205 (Y.NGN-ET-Tech) – Next Generation Networks – Emergency telecommunications –Technical considerations
  • What enhancements to existing Recommendations are required to provide energy savings directly or indirectly in information and communication technologies (ICTs) or in other industries? What enhancements to developing or new Recommendations are required to provide such energy savings?


Recommendation: All NGN related Recommendations

Questions: All NGN related Questions

Study groups:

 All NGN related ITU-T study groups

ITU-R study groups as appropriate

Standardization bodies, fora and consortia:

  • IETF
  • ETSI
  • ISO
  • 3GPP/3GPP2


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Updated : 2009-02-05