Designing Converged Networks

Ali NezhadProfessor: Centennial College

Motivation

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Before Now

BenefitsCost ReductionOne network (installation / maintenance)One group of staffsStandardization

New PossibilitiesFeatures that were not available before.

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ApplicationsMultimediaVoiceVideo Interactive applicationsDesktop sharing…

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ChallengesSingle Gateway: InternetSpecial VoIP problems

Clarity of voiceE911FaxExternal power

TCP/IP shortcomingsLack of QoS support

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Multimedia QoS Requirements

Minimum BW

Upperbound on Packet loss

Upperbound on Delay

Upperbound on Jitter

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QoS StrategiesOver provisioningRedundancyTraffic Separation (multiple VLANs)Traffic Prioritization (multiple Queues)QoS Protocols Traffic Classification

IEEE802.1p, DiffServ, MPLS, IPv6 Resource Reservation

RSVP

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End-to-End QoS

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BW

Frame level QoS

Packet level QoS

RTP & UDP

OS and Processing, CODECs

Traditional Enterprise Network

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Voice over IP

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VoIP Network

VoIP Gateway ProtocolsH.323SIP

Mobility, Unified Communication, Fixed/mobile convergence

IAXMGCP / MEGACO

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CreditsGoogle ImagesWikipedia

Ali Nezhad 13

Thank You

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