The document discusses the transition from existing telecommunications networks to Next Generation Networks (NGNs). It defines NGNs as packet-based networks that can provide telecommunication services using multiple broadband technologies. The key aspects covered include the NGN architecture consisting of access, core, control and service layers, protocols used in NGNs like SIP and key NGN services like voice, multimedia and VPNs. It concludes that NGNs will be the foundation for new multimedia applications and an evolution from separate networks to a single network capable of carrying all services.

1. Abdul Quyyum Butt
aqbutt.786@gmail.com
M.Sc. Information Technology
University of Gujrat
Pakistan

2.  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 2

3.  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 3

4.  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 4

5.  “ 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 5

6. “ 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 6

7. Today’s 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

8.  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 8

9. 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 9

10. aqbutt, University Of Gujrat
Pakistan 2/5/2013 10

11.  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 11

12. Source: ITU/BDT NGN Network Architecture
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Pakistan 2/5/2013 12

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.
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Pakistan 2/5/2013 13

14.  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 2/5/2013 14

15.  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 2/5/2013 15

16. 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 16

17. 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 17

18. 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 18

19. aqbutt, University Of Gujrat
Pakistan 2/5/2013 19

20.  Next generation networks are not just a PSTN
replacement but at a minimum they must provide the
equivalent voice quality and reliability of today’s 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 20

21.  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 21

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