07-01-2014, 04:33 PM
Next Generation Networks: Technologies, Services and Migration Strategies
Next Generation Networks.ppt (Size: 359 KB / Downloads: 138)
Introduction
Today, telephony, the Internet, and the cellular mobile networks continue to be different domains, each has its own protocols and services.
NGN will be the foundation for the creation of a new range of multimedia applications that takes full advantage of the characteristics of the broadband network and the “always on” capability.
NGN Architecture
A basic architecture was defined comprising Network Elements needed for the provision of traditional Telephony services.
Each element has distinct roles within the network and is designed to integrate horizontally with other elements in the same layer, as well as vertically with the function-based elements of the other layers.
The Next Generation Networks architecture is based on four layers: Access layer, Core layer, Control layer and Service layer.
NGN Migration Strategies
There are a number of different views as where to start first as there are no hard and fast guidelines as to what each step should be. Two different views are presented:
Breaking the problem up into smaller pieces may indeed be one of the commercial solutions as each part can proceed under its own economic constraints and timeframe.
Modernizing the control of existing voice switches and their signaling networks in a step-by-step approach to moving towards a NGN model.
ZTE Migration Scenario
ZTE produced two strategies for PSTN evolution based on softswitch network solutions.
Strategy 1: Softswitch device together with Trunking Gateway carries out the functions of legacy tandem and toll exchanges whilst the Class 5 terminal exchange remains the same .
Strategy 2: Softswitch devices together with Access Gateway carries out the functions of legacy terminal exchange while twisted pair user interface remains the same.
Conclusion
The users that are most ready to embrace the new opportunity will be the first to be migrated to the NGN model, this will then be a commercial migration with the emphasis being placed on new revenue opportunities.
The creation of the NGN is no overnight transformation, but it is an evolution that is already underway and gathering pace.