Question 3/13 - Principles and functional architecture for NGN
Motivation
A Next Generation Network (NGN) is the practical realization of the Global Information Infrastructure, i.e., the convergence of all services onto a single network, based on the principles contained in Recommendations Y.100 and Y.110. The architectural integration of the formerly discrete packet-switched and circuit-switched networks supporting these services requires evolution of the architectural principles of both types of network. There are trends both to move intelligence toward the edges of the network and to add intelligence into the network. Connectionless network layer services are evolving towards providing virtual circuit-oriented services while circuit-switched network layer services are being realized using packet technology. To establish a common architecture for the convergence among services and networks substantial studies and frameworks are required to: a) ensure interoperability of networks and applications; b) facilitate innovation in the use and application of industry capabilities; and c) facilitate best utilization of the existing telecommunications infrastructure within the NGN architecture.
Question
What new and revised framework Recommendations are required to establish the basis for realizing the converged NGN?
Tasks
- General Reference Model of the NGN
Preparation of a framework to identify the basic architectural composition of the NGN. It will be based on identification of architectural requirements in horizontal and vertical structures involved in providing Telecommunication Services in an NGN environment, including detailed multi-layer aspects in heterogeneous and homogeneous environments, and scalability enhancement across hierarcharchical and multiple domains.
- Infrastructural Roles for NGN scenarios
Application of the principles of Recommendation Y.110 to develop various scenarios in the NGN multi-provider environment.
- Functional Requirements and Architecture of the NGN
Identification of entities, their functions, and reference points, required to provide Telecommunications Services in an NGN functional reference model, taking into consideration the multi-layer impacts on functional architecture, such as addition of new functions and/or modification of existing functions. Then develop functional configuration models, which will show arrangement of each function, and functional architecture models explaining relationships among different functions in horizontal and vertical aspects.
- Identification capabilities for the NGN
Study the application, extension, combination of existing, or development of a new, naming, numbering and addressing scheme to meet the needs of the NGN.
- Convergence Scenarios
Develop various convergence scenarios, identifying the related technical issues and their practical implications.
- Reference Model for Customer Manageable NGN Networks
Develop models to allow customers to create, configure, customize, and otherwise manage the network services/resources allocated to them by the network provider, and to involve third parties in the development of applications.
- Operation of services over NGN and non-NGN networks
The converged NGN will not be realized instantaneously. This task will provide a number of scenarios and mechanisms aimed at supporting the overall functioning of services across a hybrid of existing and converged NGN.
- Implementation Framework related to provision of Emergency Communications in NGNs
Identify the technical issues, measures, and functions of particular NGN technologies that may be involved in meeting the requirements and capabilities of RecommendationY.1271.
- Maintenance of existing Recommendations
Maintenance of the following Recommendations is included:
Y.100 GII – Scenario Development Methodology
Y.110 GII – Principles and Framework Architecture
Y.1001 – IP Framework
Y.140 – Reference Point of Interconnection Framework
Y.1271 – Requirements and capabilities for emergency communications
Relationships
- Recommendation: All NGN related Recommendations
- Questions: All NGN related Questions
- Study groups: All NGN related Study Groups
- Standardization bodies, fora and consortia:
ITU-R Study Groups as appropriate
IETF working groups on NGN related matters
ETSI working groups on NGN related matters
ISO working on NGN related matters
3GPP/3GPP2 working groups on NGN related matters
Source: ITU-T, 2008
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