The basic principles of NGN functional architecture and implementation (on)
Introduction: the Internet exists as a "universal character": address planning, with the domain name server for address assignment and address identification, as well as e-mail, file transfer, WWW applications and the like. Given these characteristics and the related network infrastructure can be considered, the system will be based on IP based next generation networks. Next-generation network will be an enhanced IP-based networks.
However, the new application and request a new distribution network needs, these needs are first-generation packet network design unimaginable. It is aware of this, ITU-T's Y.2001 [1] identified a series of next-generation network features. In addition, ITU-T's Y.2011 [2] presented the basic features required to achieve these structural basis and general framework.
General view is that the traditional telecom services and next-generation network is the main difference: the former vertical integration for the distributed network for specialized applications, which is able to carry a single network for all services, the former to the latter in the transfer. For telephone service, its infrastructure from circuit-switched to packet switched infrastructure to transfer. At present, the standardization of next generation network objectives is to ensure the next generation of IP-based network can be achieved with the traditional telephone network the same standard of service, including not only telephone service, and includes the widest possible current and future multimedia applications.
1, ITU-TY.2001 recommendations: an overview of next generation network
ITU-TY.2001 proposal gives a general definition of next generation networks. Next Generation Network (NGN) to provide telecommunications services using multiple broadband and ensure quality of service (QoS) transmission technology is based on packet technology networks. In the network, and service-related functions do not depend on the basic technologies associated with the transmission. It allows users to access the network without restraint and to promote the service provider competition. NGN supports can provide personalized service and nothing is to extensive mobility.
Confirmed the definition of service and transmission of separation, make the quality of service control (QoS) added to the IP-based transmission. NGN enables service providers to easily establish the service, the user can freely choose the services. The definition also shows that mobile and fixed systems and fixed systems are properly extended mobility.
Y.2001 proposed the basic features of the CSLee and D. Knight's article made a statement (see this year's "Chinese Radio" The first issue carries the first series of translation).
2, ITU-TY.2011 proposals: general principles and next generation network reference model
ITU-TY.2011 main purpose is to establish a next-generation network services to support the development of the basis function model.
The proposed first that the next generation network layer system and the ITU-TX.200 [3] proposed the book definition of the seven Open Systems Interconnection Basic Reference Model (OSIBRM) the potential difference between. For example, in considering the next generation network system (Open System Interconnection), the contrast seven Open Systems Interconnection Basic Reference Model of the layers and special features, you may experience some difficulties in the following circumstances:
Road layers may not 7; Road single layer functions may be related to OSI basic reference model does not match;
Road Open Systems Interconnection Basic Reference Model, or prohibition of certain provisions of the terms / definitions may not apply;
Way involved in the agreement can not open system interconnection agreements (a typical example is the IP);
Road Open Systems Interconnection Basic Reference Model of consistency requirements may not apply.
I am an expert from China Computer Parts, usually analyzes all kind of industries situation, such as ceramic hair straightener iron , tourmaline ceramic hair straightener.
Processing your request, Please wait....
