Abdul Quyyum Butt

aqbutt.786@gmail.com
M.Sc. Information Technology
University of Gujrat
Pakistan
Introduction
Existing Network Infrastructure and convergence
towards the NGN
NGN: Definition and Architecture
NGN and Protocols
NGN Services
Conclusions

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Pakistan 2/5/2013
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.


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Pakistan 2/5/2013
The general idea behind the NGN is that one
network transports all type of data and provide
services (voice, data, and all sorts of media such as
video) by encapsulating these into packets, similar
to those used on the Internet.
NGNs are commonly built around the Internet
Protocol (IP), and therefore the term all IP is also
sometimes used to describe the transformation
toward NGN.
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Pakistan 2/5/2013
A next-generation network (NGN) is a packet-based
network which can provide services including
Telecommunication Services and able to make use of
multiple broadband, quality of Service-enabled transport
technologies and in which service-related functions are
independent from underlying transport-related
technologies. It offers unrestricted access by users to
different service providers. It supports generalized
mobility which will allow consistent and unrestricted
provision(access) of services to users.
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Pakistan 2/5/2013
NGN is a concept for defining and deploying networks,
which, due to their formal separation into different layers
and planes and use of open interfaces, offers service
providers and operators a platform which can evolve in a
step by step manner to create, deploy and manage
innovative services.
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Pakistan 2/5/2013
Todays network is divided into:
The Public Switched Telephone Network,
The packet Switched Networks(e.g. the Internet) and
The Mobile networks.
Convergence is the process of interconnection of
traditional switched circuit networks (the PSTN and
mobile networks) and packet-switched networks based
on the Internet Protocol (IP) for routing.

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Pakistan
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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.

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Pakistan 2/5/2013
1-Access layer elements includes different Media
Gateways that support connection to and from the
access network with the core network.
2-Core layer is the network handling converged
services based on IP.
3-Control layer is the call server that provides call
control functions and also provides the control of the
Media Gateway.
4-Service layer is an IT platform that plays the role of
an IN-SCE (Intelligent Network Service Creation
Environment) extending their functionality in order to
cover the new network scenarios

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Pakistan 2/5/2013
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Pakistan 2/5/2013
Next Generation Networks require new protocols to
support converged networks.
Requirements
Support for legacy PSTN interworking, Migration
Plan from legacy to NGN, High availability, Lifeline
services and Scalability
With so many protocols, which one to choose?
H.323,SIP(Session Initiation Protocol),
MGCP(Media Gateway Control Protocol), SIGTRAN

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Pakistan 2/5/2013
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Pakistan 12
Source: ITU/BDT NGN Network Architecture
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Pakistan 13
Access Gateway
-Allows the connection of Subscriber to the
packet network.
-convert the traffic flow of analogue signal
to packet network
Trunking Gateway
- Allows interworking between TDM
telephony network to packet-based network.


Softswitch
- Referred to as Call Agent or Media Gateway
Controller (MGC)
provides the service delivery control within the
network via
H.248 protocol, sip protocol
- Performs signaling gateway functionality for
interworking with
PSTN N7 signaling network.
- Provides connection to Intelligent Network or
Applications
Server (AS) to offer another services

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Pakistan 14
Applications Server (AS)
- Support service execution, e.g. to control call
server and NGN special resources (e.g. media
server, message server) via these protocol: H.248,
SIP, SS7, ENUM, MPLS, BGP etc.

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Pakistan 15
Several services that will be important drivers in the NGN
environment are:
1-Voice Telephony: Call Waiting, Call Forwarding, 3-Way
Calling
2-Voice Portal: Provide callers with anywhere, anytime
access to information like news, weather, stock quotes,
and account balances using simple voice commands
and any telephone,..
3-Data services: bandwidth-on-demand, connection
reliability.
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Pakistan 2/5/2013
4-Multimedia services: This allows customers to converse
with each other while displaying visual information.
5-Virtual Private Networks: allow large, geographically
dispersed organizations to combine their existing private
networks with portions of the PSTN, thus providing
subscribers with uniform dialing capabilities.
6-Public Network Computing: Provides public network-
based computing services for businesses and
consumers.
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Pakistan 2/5/2013
7-Unified Messaging: Supports the delivery of voice mail,
email, fax mail, and pages through common interfaces.
8-E-Commerce: Allows consumers to purchase goods and
services electronically over the network.
9-Call Center Services: A subscriber could place a call to a
call center agent by clicking on a Web page.
10-Interactive gaming: Offers consumers a way to meet
online and establish interactive gaming sessions.
11-Home Manager: These services could monitor and
control home security systems, energy systems, home
entertainment systems, and other home appliances.

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Pakistan 2/5/2013
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Pakistan 2/5/2013

Next generation networks are not just a PSTN
replacement but at a minimum they must provide the
equivalent voice quality and reliability of todays PSTN.

The NGN will be the foundation for the creation of a new
range of multimedia applications that take full advantage
of the characteristics of the broadband network and the
always on capability.
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Pakistan 2/5/2013
The creation of the NGN is no overnight transformation,
but it is an evolution that is already underway and
gathering pace.
The NGN is the shift from separate application-specific
networks to a single network capable of carrying any
and all services.

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Pakistan 2/5/2013
THANK YOU
For feedback
Aqbutt.786@gmail.com
11050856-001@uog.edu.pk
University of Gujrat(UOG)
Pakistan
2/5/2013
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Pakistan 22