NEXT GENERATION NEXT GENERATION NETWORKS (NGN) AND IMSNETWORKS (NGN) AND IMS

• What is NGN?What is NGN?

• Need for NGNNeed for NGN

• Objectives of NGNObjectives of NGN

• Fundamental characteristics of NGNFundamental characteristics of NGN

• Challenges of NGNChallenges of NGN

• Architecture of NGNArchitecture of NGN

• IP Multimedia Subsystem (IMS)IP Multimedia Subsystem (IMS)

NEXT GENERATION NEXT GENERATION NETWORKS (NGN) AND IMSNETWORKS (NGN) AND IMS

Hafeth Dawbaa 228/2009Hafeth Dawbaa 228/2009

• A Next Generation Network (NGN) is a packet-based A Next Generation Network (NGN) is a packet-based network able to provide Telecommunication Services to network able to provide Telecommunication Services to users and able to make use of multiple broadband, QoS-users and able to make use of multiple broadband, QoS-enabled transport technologies and in which service-enabled transport technologies and in which service-related functions are independent of the underlying related functions are independent of the underlying transport-related technologies. It enables unfettered transport-related technologies. It enables unfettered access for users to networks and to competing service access for users to networks and to competing service providers and services of their choice. It supports providers and services of their choice. It supports generalized mobility which will allow consistent and generalized mobility which will allow consistent and ubiquitous provision of services to users. ubiquitous provision of services to users.

What is NGN?What is NGN?

ITU-T REC. Y.2001 (12/2004)ITU-T REC. Y.2001 (12/2004)

March 17, 2013 2

March 17, 2013 3

• The next-generation network (NGN) is body of key architectural changes in telecommunication core and access networks. The general idea behind the NGN is that one network transports all information and 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, and therefore the term all IP is also sometimes used to describe the transformation toward NGN.

March 17, 2013 4

• In the core network, NGN implies a consolidation of several (dedicated or overlay) transport networks each historically built for a different service into one core transport network (often based on IP and Ethernet). It implies amongst others the migration of voice from a circuit-switched architecture (PSTN) to VoIP, and also migration of legacy services such as X.25, frame relay (either commercial migration of the customer to a new service like IP VPN, or technical emigration by emulation of the "legacy service" on the NGN).

• In the wired access network, NGN implies the migration from the dual system of legacy voice next to xDSL setup in local exchanges to a converged setup in which the DSLAMs integrate voice ports or VoIP, making it possible to remove the voice switching infrastructure from the exchange.

• In the cable access network, NGN convergence implies migration of constant bit rate voice to CableLabs PacketCable standards that provide VoIP and SIP services. Both services ride over DOCSIS as the cable data layer standard.

Main architectural changes that NGN Main architectural changes that NGN involvesinvolves

March 17, 2013 5

Emerging of need for a Emerging of need for a comprehensive network comprehensive network

March 17, 2013 6

Objectives of NGNObjectives of NGN

• promote fair competition

• encourage private investment

• define a framework for architecture and capabilities to be able to meet various regulatory requirements

• provide open access to networks

• ensuring universal provision and access to services

• promoting equality of opportunity to the citizen

• promoting diversity of content, including cultural and linguistic diversity

• recognizing the necessity of worldwide cooperation with particular attention to less developed countries

March 17, 2013 7

March 17, 2013 8

Fundamental characteristics of NGNFundamental characteristics of NGN

• packet-based transfer

• decoupling of service provision from transport

• support for a wide range of services

real time, streaming, non-real time and multimedia

• broadband capabilities with end-to-end QoS

• generalized mobility

• interworking with legacy networks via open interfaces

• unrestricted access by users to different service providers

• converged services between fixed/mobile

• independence of service-related functions from underlying transport technologies

• support of multiple last-mile technologies

The ability for the user or other mobile entities to The ability for the user or other mobile entities to communicate and access services irrespective of changes communicate and access services irrespective of changes of location or technical environment. The degree of service of location or technical environment. The degree of service availability may depend on several factors including Access availability may depend on several factors including Access Network capabilities, service level agreements between the Network capabilities, service level agreements between the user's home network and the visited network (if applicable), user's home network and the visited network (if applicable), etc. Mobility includes the ability of telecommunication with etc. Mobility includes the ability of telecommunication with or without service continuity.or without service continuity.

……

March 17, 2013 9

March 17, 2013 10

Challenges of NGNChallenges of NGN

• The quality of service (QoS)The quality of service (QoS)

• The management challengeThe management challenge

• The transition challengeThe transition challenge

• The security challengeThe security challenge

• The economic challengeThe economic challenge

March 17, 2013 11

NGN ArchitectureNGN ArchitectureNext Next →→