1.3 NGN architecture and main elements.ogs.pdf - BTCl

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NGN Network ElementsIMS ArchitectureIMS main functional elements:•Application Server (AS)• Voice Application Servers (VAS)• Instant Messaging (IM)•Home Subscriber Server (HSS)•Call Session Control Function (CSCF)•Breakout Gateway Control Function (BGCF)•Media Gateway Function (MGW)•Media Gateway Control Function (MGCF)•Multimedia Resource Function Controller (MRFC)•Multimedia Resource Function Processor (MRFP)InternationalTelecommunicationDhaka, Bangladesh, May 2011 ITU - NGN elements - OGSUnion 26
NGN Network ElementsIMS ArchitectureApplication Server (AS)• Contains Call Related Application Logic• Facilitates a Service Creation Environment• Queried by S-CSCF in Real Time to Execute Logic• Generally Specialized for Each Service• May Provide Gateway to Legacy Applications (e.g. AIN)InternationalTelecommunicationDhaka, Bangladesh, May 2011 ITU - NGN elements - OGSUnion 27
Page 1 and 2: ITU-D Workshop on NGN MigrationStra
Page 3 and 4: Motivation: PremisesStrategic Trend
Page 5 and 6: Motivation: Why• Flexibility for
Page 7 and 8: General functional modelfor NGNInte
Page 9 and 10: Network Architecture:Existing netwo
Page 11 and 12: Network Architecture:Old and New st
Page 13 and 14: NGN Network ElementsPacket networks
Page 16 and 17: NGN Network ElementsSoftswitch/MGCr
Page 18 and 19: NGN Network ElementsSignaling Gatew
Page 20 and 21: NGN Network ElementsOSPFOpen Shorte
Page 22 and 23: NGN Network ElementsIMSIP Multimedi
Page 24 and 25: NGN Network ElementsIMS Architectur
Page 28 and 29: NGN Network ElementsFlow control at
Page 30 and 31: NGN Network ElementsFlow control at
Page 32: NGN Concepts and ElementsSummary of

1.3 NGN architecture and main elements.ogs.pdf - BTCl

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