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1、AdHocNetworks11(2013)39–53ContentslistsavailableatSciVerseScienceDirectAdHocNetworksjournalhomepage:www.elsevier.com/locate/adhocAnintegratedsystembasedonwirelesssensornetworksforpatientmonitoring,localizationandtrackingAlessandroRedondi,MarcoChirico
2、,LucaBorsani,MatteoCesana?,MarcoTagliasacchiDipartimentodiElettronicaeInformazione,PolitecnicodiMilano,P.zzaLeonardodaVinci,32,Milano,ItalyarticleinfoabstractArticlehistory:ThisworksdescribesthesystemLAURAwhichprovidespatientlocalization,trackingandR
3、eceived28November2011monitoringserviceswithinnursinginstitutesthroughawirelesssensornetwork.Thesys-Receivedinrevisedform23March2012temiscomposedofthreefunctionalblocks:alocalizationandtrackingenginewhichper-Accepted25April2012formslocalizationoutofsa
4、mplesofthereceivedsignalstrengthandtrackingthroughaAvailableonline4May2012particle?lter;apersonalmonitoringmodulebasedonbi-axialaccelerometerswhichclas-si?esthemovementsofthepatientseventuallydetectinghazardoussituations,andawire-Keywords:lesscommuni
5、cationinfrastructuretodelivertheinformationremotely.ThepaperIndoorlocalizationcommentsonthedesignanddimensioningofthebuildingblocks.Twoapproachesarepro-E-healthWirelesssensornetworkposedtotheimplementationofthelocalizationandtrackingengine:acentraliz
6、edimple-mentationwherelocalizationisexecutedcentrallyoutofinformationcollectedlocally,andadistributedsolutionwherethelocalizationisperformedatthemobilenodesandtheout-comeisdeliveredtothecentralcontroller.Strengthsandweaknessesofthetwosolutionsarehigh
7、lightedfromasystem’sperspectiveintermsoflocalizationaccuracy,energyef?-ciencyandtraf?cloads.LAURAmodulesare?nallytestedinarealenvironmentusingcom-mercialhardware.Themainoutcomesareanaveragelocalizationerrorlowerthan2min80%ofthecasesandamovementsclass
8、i?cationaccuracyashighas90%.ó2012ElsevierB.V.Allrightsreserved.1.Introductionular,inthe?eldofdeviceminiaturizationandwirelesscommunicationtechnologieshaveopenedupenormousTheimprovementofhealthcaresystemsandinfrastruc-opportunitiestodesignubiquitousan
