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

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NGN Architecture and Elements• Motivation and concept• NGN Architecture• Network ElementsDhaka, Bangladesh, May 2011ITU - NGN elements - OGSInternationalTelecommunicationUnion
NGN Network ElementsPacket networksInformation is packetized in variable packet sizes with controlheaders to allow appropriate routing and deliverytrend is to use IP based networks over various transportpossibilities (ATM, SDH, WDM…)IP networks must offer guarantees of Quality of Service (QoS)regarding the real time characteristics of voiceIPv4Internet Protocol at network level that insert headers for eachpacket in order to allow end to end packet flows: v4 is the firstwidely used version with 20 octet headerIPv6Internet Protocol at network level that insert headers for eachpacket in order to allow end to end packet flows: v6 is the latestversion with 40 octet header and adding capabilities for currentrequirements in addressing and routingDhaka, Bangladesh, May 2011ITU - NGN elements - OGSInternationalTelecommunicationUnion
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: Network Architecture:Old and New st
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 26 and 27: 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

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