Evolution….not Revolution

June 12, 2014

An Article on Next Generation Network (NGN):
Evolution….not Revolution
Evolution of Next Generation Network (NGN) from existing Network (Circuit/Packet Based)
Existing Networks:
At present, separate networks exist for voice, data, and for various others Networks. Over the years, network operators have been looking for a ‘service Independent network architecture’ which can facilitate rapid and economical introduction of new services.
There are two major existing networks:
Public Switching Telephone Networks(PSTN)/Circuit Switching – These networks provides voice based services
Data Network/Packet Switching – These network provides data based services
Disadvantages of using these networks separately:
High maintenance cost
Low security
Complexity
NGN:
NGN is a converged Internet Protocol backbone network capable of carrying both data and voice. NGN is envisaged to facilitate the convergence of voice, data and video networks into a single unified packet based multi-service network capable of providing futuristic service.
Advantages:
Easily Scalable.
Maintenance cost is low.
Investment Protection.
Enhanced Security and Protection.
Access protocol Adaption
Services offered by NGN:
Specialized resource services (e.g., provision and management of transcoders, multimedia multipoint conferencing bridges, media conversion units, voice recognition units, etc.)
Processing and storage services (e.g., provision and management of information storage units for messaging, file servers, terminal servers, OS platforms, etc.)
Middleware services (e.g., naming, brokering, security, licensing, transactions, etc.)
Application-specific services (e.g., business applications, e-Commerce applications, supply-chain management applications, interactive video games, etc.)
Content provision services that provide or broker information content (e.g., electronic training, information push services, etc.)
Interworking services for interactions with other types of applications, services, networks, protocols, or formats (e.g., EDI translation)
Management services to maintain, operate, and manage communications/computing networks and services
Why NGN:
NGN is a logical upgrade by all infrastructure owners, incumbents and alternates alike, to stay up to speed with the evolution of technologies and to obtain cost effectiveness.
NGN is used for core of the networks.
NGN: A unique opportunity for regulators to set the conditions for a competitive market.
Greater flexibility, in terms of the technology and services on offer
And most importantly, a significant reduction in the cost of running and maintaining separate voice, data and Internet services
But as with any new technology there is a risk attached, that the NGNs can be built to foreclose competition which may jeopardize consumer interest.
Protocols Involved:
H.248 Protocol / MEGACO
It is used as media gateway control protocol b/w media gateway controller and media gateway or it is used b/w soft switch control equipment and various media gateways
MG-Media Gateway:
It is responsible for the packetization of voice traffic and transmitting traffic towards the destination
H.323 / SIP (Session Initiation Protocol)
It is defined as packet based multimedia communication system including VOIP (Basically 1st generation IP phones) i.e. it means H.323 made real time voice and video over IP. It is most widely used because of its veteran status but it has limited function extensibility and limited system capacity extensibility because of these drawback SIP Protocol come into the picture
SIGTRAN Protocol
SIGTRAN (Signaling transport) is protocol stack defined by the SIGTRAN workgroup of Internet Engineering Task Force (IETF) for transport real time signaling data over IP network, It defines suite of protocol to carry SS7 and ISDN messages over IP
Signaling Gateway responsible for interfacing to the SS7 network and passing signaling messages to the IP nodes.
Service providers from around the globe are implementing the NGN strategies and planning to invest billion of rupees in rollout of NGN.
NGN based networks are here to take advantages of fast and flexible services creation and provisioning capabilities, while also providing for legacy interworking and combinational services that make use of most of the existing investments. Operators can then build networks toward the all IP versions offering rich multi-access multimedia services.

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