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1、VideoCommunicationsoverDynamicAdHocNetworksSastryKompellaDept.ofElectricalandComputerEngineeringMobileandPortableRadioGroup(MPRG)VirginiaTechAdvisor:Prof.ThomasHouIREANResearchWorkshop,April7–8,2006OutlineòBackgroundòApproachòModelingandFormulationòSolutionProcedureò
2、SimulationResultsòMultidisciplinaryaspectsòSummaryIREANResearchWorkshop,April7-820062MyBackgroundandGoalsòPh.D.student¢ComputerEngineering¢Aug2003–presentòPriorexperience¢ProjectEngineer,SymtxInc.,Austin,Texas,1998-2003¢M.SElectricalEngineering,TexasTechUniversity,19
3、98¢B.EECE,AndhraUniversity,India1996òGoals¢Shortterm:Ph.D.degree.¢LongTerm:ContinueresearchinadvancedwirelessnetworkingIREANResearchWorkshop,April7-820063ResearchScopeòVideocommunicationsovermulti-hopwirelessnetworks¢Problemformulationinvolvesapplicationlayerandnetwo
4、rklayers©Cross-layeroptimization¢Broadclassofproblems©Nonlinear,Non-convex¢Exploredperformancelimits©Tradeoffbetweenroutingoptimalityandcomputationalcomplexity¢ContributionsincludebothformalsolutionprocedureandhighlyeffectivefastheuristicsIREANResearchWorkshop,April7
5、-820064VideoCommunicationsoverDynamicAdHocNetworksòObjective:òOurfocus:¢Developenablingtechnologiesto¢Adhocnetworksundersupportvideocommunicationsextremeenvironmentsoverdynamicadhocnetworks¢Frequentnode/linkfailure,jamming,mobility,etc.¢Traditionallayeredvideonotwell
6、-suitedtooperate¢Videocommunications©Challengingenvironment©Stringentlossrequirementsthandatacommunications.IREANResearchWorkshop,April7-820065OurObjectiveòVideocommunicationsindynamicadhocnetworks¢Developenablingroutingtechnologies¢Providesustainablevideoqualityunde
7、rextremeconditions¢ResilienttofrequentlinkandnodefailuresòExplorecross-layeroptimization¢NetworklayerroutingalgorithmswithexplicitconsiderationofapplicationlayerperformanceòKeyquestions¢Howtomodelthevideoqualityasafunctionofrouting?¢Whatistheperformancelimit?IREANRes
8、earchWorkshop,April7-820066ApproachòMultipledescription(MD)video:EachdescriptioncodedindependentlyòMultipath:inherenttoadhocnetwork
