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1、SmartHomeTechnologyLinkyourhome'slighting,entertainmentandsecuritysystemswithnewautomatedhometechnology.Smarthomeisexpectedtooffervariousintelligentservicesbyrecognizingresidentsalongwiththeirlifestyleandfeelings.Oneofthekeyissuesforrealizingthesmarthomeis
2、howtodetectthelocationsofresidents.Currently,theresearcheffortisfocusedontwoapproaches:terminal-basedandnon-terminal-basedmethods.Theterminal-basedmethodemploysatypeofdevicethatshouldbecarriedbytheresidentwhilethenon-terminal-basedmethodrequiresnosuchdevic
3、e.Thereisagrowinginterestinsmarthomeasawaytoofferaconvenient,comfortable,andsaferesidentialenvironment.Ingeneral,thesmarthomeaimstoofferappropriateintelligentservicestoactivelyassistintheresident’slifesuchashousework,amusement,rest,andsleep.Hence,inorderto
4、enhancetheresident’sconvenienceandsafety,devicessuchashomeappliances,multimediaappliances,andinternetappliancesshouldbeconnectedviaahomenetworksystem,asshowninFig.1,andtheyshouldbecontrolledormonitoredremotelyusingatelevision(TV)orpersonaldigitalassistant(
5、PDA).Especially,attentionhasbeenfocusedonlocation-basedservicesasawaytoofferhigh-qualityintelligentservices,whileconsideringhumanfactorssuchaspatternofliving,health,andfeelingsofaresident.Thatis,ifthesmarthomecanrecognizetheresident’spatternoflivingorhealt
6、h,thenhomeappliancesshouldbeabletoanticipatetheresident’sneedsandofferappropriateintelligentservicemoreactively.Forexample,inapassiveserviceenvironment,theresidentcontrolstheoperationoftheHVAC(heating,ventilating,andairconditioning)system,whilethesmarthome
7、wouldcontrolthetemperatureand5humidityofaroomaccordingtotheresident’scondition.Variousindoorlocation-awaresystemshavebeendevelopedtorecognizetheresident’slocationinthesmarthomeorsmartoffice.Ingeneral,indoorlocation-awaresystemshavebeenclassifiedintothreety
8、pesaccordingtothemeasurementtechnology:triangulation,sceneanalysis,andproximitymethods[8].Thetriangulationmethodusesmultipledistancesfrommultipleknownpoints.ExamplesincludeActiveBadges,ActiveBats,andEasyLivin
