Slide 1Slide 2Slide 3Slide 4Slide 6Slide 7Slide 8Slide 9Slide 10Slide 11MSSFixed NetworkMSSMSS MSSi142356New Call Arrivalis the estimated loadle > accepted loadla Is a channel availableIs Pr <= frGenerate Probability PrCompute fr = la/leCall BlockedChannel AssignedOngoing CallChannel ReleaseCall BlockedYNNYNYHandoff RegionAI JBCEHGFMT2MT1Segments EF,FG and FH are handoff – probable segmentsDbandwidthTimeFlow AFlow BbandwidthTimeFlow A Flow B(a)(b)Cell PhoneIP BackboneAP APWLAN terminal UMTS COREUTRANGGSNSGSN(a)APAPCAPRNCNode- B APMobile Node Mobile Node(b)A call request arrivalVoice call ?Try CellularNo free bandwidth availFor voice in cellularNew Call ?In double coverage?Try WLANNo free bandwidth Avail in WLAN?RejectedAccepted toCellularNew Call?In double coverage?Try WLANBandwidth availIn WLAN?Accepted to WLANFrom cellularTo WLAN ?Bandwidth AvailIn WLAN?Bandwidth Avail In Cellular ?Try CellularRejectedAccepted toCellularRemain inCellularNo (it’s a data call)yesNoNoNoyesyesNoyesyesyesNoNoNoyesyesyesNoNoNo (it’s a handoff call)yesyesTraffic Class Applications Delay JitterLowLossesGuaranteedBit-rateConversational(Real Time)Streaming(Real Time)Interactive(Best Effort)Background(Best Effort)Voice, one to one videoBroadcast Audio VideoWeb, Database, GamesEmails, File Transfer Stringent ConstrainedLoose Stringent ConstrainedYesYesYesYesTraffic classConversational classconversational RTStreaming classstreaming RT Interactive classInteractive best effort BackgroundBackground best effortFundamentalcharacteristics- Preserve time relation (variation) between information entities of the stream- Conversational pattern (stringent and low delay)- Preserve time relation (variation) between information entities of the stream- Request response pattern- Preserve payloadcontent- Destination is not expecting the data within a certain time- Preserve payloadcontentExample of the application- voice - streaming video - Web browsing- Background download of emailsNode BAPNode BRoaming InRoaming outMonitorPPMCACMMMRNCRNCRNCSGSNSGSNGGSNNode BAccess networksCore networksDiffServ Internet backboneCellular DomainOther domains (Ethernet, ad hoc,Networks, sensor networks,WMANs, etc.)WLAN domainWLAN domainWLAN domainWLAN domainWLAN domainGateway RouterCdma2000 domainUMTS domainGSM/GPRS
View Full Document
Unlocking...