01-12-2012, 05:39 PM
Next Generation Networks
1Next Generation.ppt (Size: 1.45 MB / Downloads: 136)
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)
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
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
Transition to Third wave:
Ubiquitous & Pervasive Networks
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 and ubiquitous provision of services to users.”
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