健康监护智能终端的动态电压调节策略分析

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1、AbstractWiththecontinuousdevelopmentofnetworking,communicationsandmicroprocessorchiptechnologyaswellastheemphasisonhealthcare,anewhealthservicemodelemerges:wirelesshealthmonitoring.Wirelesshealthmonitoringsystemiscorrposedofthreeparts:thewirelessbodyareanetwork(WBAN),thelocalintelli

2、gentterminalandtheremoteservicecenter.Thesmartterminalisanembeddedsystem,whichcanprocesseshealthdataintelligentlyandhashighrequirementsbothinareasofthereal-timeandthepowerconsumption.Intelligentterminalpowerconsumptioncanbereducedbybothstatictechnologyanddynamictechnology.However,st

3、atictechnologycarftfullymeetthepowerconsunptionofthesystem,thecurrentstudiesarefocusedonthedynamiclow-powertechnology,theDPM(DynamicPowerManagement)andDVS(DynamicVbltageScaling).DVSisatechniquethatsacrificesperformanceofthesystemtosaveenergy.MostoftheDVSschedulingalgorithmstendtoslo

4、wthespeedofprocessingtheevent,theslowerthebetter,ratherthanconsidertimingconstraints-BasedontheanalysisofdynamicvoltagescalingandadaptiveDVSschedulingpolicy,accordingtotheintelligentterminalloadpredictability,bothpowerandtimingrequirements,anddynamicselectionofactiveonlineDVSschedul

5、ingandnegativeDVSschedulingpolicy,improvetheadaptiveschedulingfortheintelligentterminalworkingcharacteristics.FirstanalyzesthebeneficialcharacteristicsoftheadaptiveDVSschedulingpolicywiththepower,timing.FollowedbyimprovedDVSschedulingpolicyusedintheintelligentterminal,usethemaximuma

6、mountofdataofECGdatatoverifytheactuallow-powercharacteristicsofthestrategy.TheresultsshowthattheadaptiveDVSstrategycanreducethepowerconsumptionof4.2%oftheentireintelligentterminal,improvedDVSstrategycanbetoreduce6.5%ofthepoweroftheintelligentterminal.Keywords：EmbeddedsystemsWireless

7、healthmonitoringLow-powerdesignDynamicvoltagescalinghi目录摘要IAbstractII1绪论11.1无线健康监护及智能终端11.2嵌入式系统及其低功耗技术21.3嵌入式系统中的电源技术31.4论文的主要工作及创新点42基于WBAN的人体健康监护系统62.1系统介绍62.2智能终端的主流低功耗技术122.3本章小结163用于智能终端的DVS调度策略研究173.1自适应DVS调度策略183.2智能终端的数据处理特征203.3对自适应DVS策略的改进223.4Linux内核中的功耗管理253.5本章小结274DVS

8、调度策略的实现及验证284」DVS调度