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1. • COURSE TITLES: ADVANCED
NETWORKING
• PRESENTED BY :ISSAM EID
• PRESENTED TO :DR.
• PROJECT NAME:NEXT GENERATION
NETWORK

2. Next Generation Network
A. Transition to NGN
B. Key drivers of NGN development
C. Transport mechanism of the unified network
D. NGN architecture
E. Main NGN building blocks

3. A. Transition to NGN: First wave
• Growth of Internet and other IP-based networks with their
requirements for bandwidth and capacity has driven rapid
innovation in telecommunication access and transport networks
Examples:
– leveraging copper wire “last-mile” networks
through digital subscriber line (“DSL”) technologies
– re-architecturing of cable networks to support IP ‑
services
– advances in optical networking technologies (e.g.
PON)

4. Convergence of Telephony World and Internet World

5. Transition to NGN: Second wave
• Ongoing trend towards integration & interoperability of IP-
based and PSTN network services and applications
• Emergence of differentiated Quality of Service IP-based services
• Managed end-to-end performance needed for new applications
requiring real-time traffic (e.g., video, voice)
• New network management, QoS, traffic engineering, pricing &
accounting models

6. Transition to NGN: Third wave
Evolution of current PSTN, mobile, wireless and
IP-based networks to unified Next Generation Networks
providing both Internet and carrier-grade telecommunications
networks and services offerings with QoS

7. One network for everything
TodayToday TomorrowTomorrow
Telephone
network
Mobile radio
network
IP-Network
Multimedia Access - Advantages:
• easy to handle
• reliable
• mobile
Internet
Transition to NGN: Third wave

8. ITU-T definition of NGN (Feb 2004)
“A Next Generation Network (NGN) is a packet-based network
able to provide services including Telecommunications Services
and able to make use of multiple broadband, QoS-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 provision of services to users.”

9. B. Key drivers of NGN development
Situation Today Target Solution
VoiceVoice
FRFR
IPIP
ATMATM
...
The Unified
Multi Service
Network
The Unified
Multi Service
Network

10. Unified Network: voice migration
VoiceVoice
FRFR
IPIP
ATMATM
...
The Unified
Multi Service
Network
The Unified
Multi Service
Network
Some what more complex
- From circuit switched to packet switched
- Voice switches need to disappear in the long term
A new network concept
supporting voice in a packetized environment
is required
The Next Generation Network

11. Unified network: data migration
VoiceVoice
FRFR
IPIP
ATMATM
...
The Unified
Multiservice
Network
The Unified
Multiservice
Network
Pure technology/standardization matter:
Transport of different data services
over a unique data backbone

12. B. Key drivers of NGN development (Cntd.)
• Short Term objective:
Create new revenue possibilities
– Removal of boundaries between voice and data opens
the way to new kind of services
– Can be realized relatively quickly with limited
investments
• Long Term objective:
Realize cost savings
– Simpler network
– More efficient network
– Cheaper network components
– Full benefit only realized when all separate networks
have fully migrated towards to the target solution

13. Example NGN Service Drivers

14. Driven by
Cost Reduction
Possibilities
Driven by
Revenue Increase
Possibilities

15. C. Transport mechanisms of the unified network
• The unified network will use packet-based technology as
the common transport mechanism
– Data is the fastest growing segment due to
• Success of Internet
• Growing use of E-mail
• Growing data traffic between business users
– Data should be handled in the most efficient way
– Packet technology is the best way to transport data
– Packet technology is only technology that allows
simultaneous delivery of different information streams
towards one and the same end-point on one single
connection

16. D. NGN architecture
•Evolution of network architecture
– Traditional telephony - Circuit switch based PSTN

17. D. NGN architecture (Cntd.)
• Evolution of network architecture (Cont.)
– Circuit Switched PSTN + Packet Switched IP network (VoIP Gateway)
SG – Signaling gateway
MGC – Media gateway controller
MG – Media gateway

18. D. NGN architecture (Cntd.)
•Evolution of network architecture (Cont.)
– Comletely IP-oriented network