1.3 NGN architecture and main elements.ogs.pdf - BTCl
1.3 NGN architecture and main elements.ogs.pdf - BTCl
1.3 NGN architecture and main elements.ogs.pdf - BTCl
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Network ArchitectureExisting networks <strong>and</strong> <strong>architecture</strong>NATIONAL LAYERREGIONAL LAYERLEXLAYERRULAYERcustomersLAYERDhaka, Bangladesh, May 2011TRANSIT NETWORKITU - <strong>NGN</strong> <strong>elements</strong> - OGS• Hierarchical topology with 4to 5 layers, connectivity to theupper next layer <strong>and</strong> withineach layer as a function ofeconomical optimization• Number of nodes as afunction of O/D traffic <strong>and</strong>nodes capacity• Service h<strong>and</strong>ling for media,signaling <strong>and</strong> control at allexchange nodes•Carrier grade quality withwell defined QoS criteria <strong>and</strong>st<strong>and</strong>ardized engineeringrulesInternationalTelecommunicationUnion
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