IMS( IP Multimedia Subsystem )

Presented by: Naouar ilies

OutlineOutline

� Introduction

� Next Generation Network (NGN)

� Concept and architecture of NGN

� IP Multimedia Subsystem

Architecture and entities of IMS� Architecture and entities of IMS

� IMS Call

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IntroductionIntroduction

With the model defined by the operators, the telephone network could not provide any other services than the scheduled ones.So, the emergence of a new concept, the intelligent network ( “Intelligent Network IN”)

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Next Generation NetworkNext Generation Network

The Challenge of NGN should provide all these criteria

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Next Generation Network ConcepNext Generation Network Conceptt

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PSTNWireless

� 3G wireless + IP ++

� Standard Services

IP

IMS

� Internet �W-CDMA

3G Wireless

Evolution of TechnologyEvolution of Technology

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PSTN� Standard Services Platform

� Converged Applications & Content

� Access Independence

� Internet

– VoIPa

– Instant Messaging

–Web Applications

�W-CDMA

�GPRS/UMTS� Circuit switched

� Analog

�Digital

� 2G (GSM & CDMAANSI-41)

� Circuit switched

� Analog

� Digital

� SS7

� ISDNaa

IMS ArchitectureIMS Architecture

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IMS EntitiesIMS Entities

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SIP ProtocolSIP Protocol

•Session Initiation Protocol is a protocol

standardized by the IETF.

•Designed to establish, modify and terminate

multimedia sessions

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•Does not convey the information exchanged

during the session such as voice or video

•RTP provides the most audio and video

sessions

IMS Call: SIP IMS Call: SIP & IMS& IMS•SIP has been chosen by the IMS for its simplicity and its specific role.

•Also, in the instant messaging, it will detect the presence or not of the subscriber.

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Thank you for your

attention

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