基于无线体域网的能量效率优化方法-研究

《基于无线体域网的能量效率优化方法-研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、哈尔滨工业大学工学硕士学位论文AbstractInrecentyears,withthedevelopmentofinformationandtechnology,wirelesssensornetworkapplicationsdabbleinavarietyoffields.Asoneoftheseimportantapplications,wirelessbodyareanetwork(WBAN)whichisappliedtothefieldofmedicalandhealthcareattractsmoreandmoreattentions.WBANiscompo

2、sedofwirelesssensornodeswhichareattachedtothehumanbodyandacoordinator.Thesensornodescollecthuman’sphysiologicalsignalsandtransferthemtothecoordinatorwhichhasacertaincomputingcapabilitiessuchaspersonaldigitalassistantandtelephoneandsoonandthenthecoordinatortransfersthedatatothehandlingsyste

3、minhospitalviathemobilenetwork.Sincethesensornode’senergyisextremelylimited,itisakeyissuetoimprovetheenergyefficiencyofWBAN.Accordingtothecharacteristicsofthewirelessbodyareanetwork,wemakearesearchontheresourceallocationmethods.Themathematicalmodelofresourceallocationwhichissolvedsubsequen

4、tlyinWBANisestablished.Themajorworksinthispaperareinthefollowing:Firstly,researchonsystemmodelofWBAN.Thesystemmodelwhichincludesthetopology,channelpathlossmodelandtheoperatingmodearestudiedandanalyzedwhichisthebackgroundofthethesis.Andthenweintroducetheconvexoptimizationproblemanditssolver

5、(CVX)briefly.Secondly,networkglobalenergyminimizationmodelofWBAN.Underthebackgroundofthenetworkstructureandthetransmissioncharacteristicsofmedicalmonitoring,fromtheperspectiveofresourceallocation,weoptimizetheallocationoftransmissionpower(transmitrate)andtransmissiontimesimultaneouslyfromt

6、heperspectiveofresourceallocationinWBAN.Finally,thetotalenergyminimizationmodelisestablishedwhichisprovedtobeageometricprogramming.Afterthat,wecanachievetheoptimalresultsandtheenergyefficiencyofWBANisimprovedaccordingly.Thirdly,networklifetimemaximizationmodelofWBAN.Basedonthetotalenergymi

7、nimizationmodelandthebusinesscharacteristicsofWBAN,weproposethenetworklifetimemaximizationmodelandprovethatitisalsoageometricprogramming.Accordingtothesimulation,wecanconcludethatenergyefficiencycanbeobviouslypromotedbytheproposedmethods.Keywords:WBAN，energyef