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重庆邮电大学学报(自然科学版) 2007
A novel architecture for ubiquitous location based services in TD SCDMA 〖WT5”HZ〗Key words:〖WT5”BZ〗Keywords: positioning,methods,QoS,TD,SCDMA,Architecture Abstract: Advancesinmobiledevices,sensorsandwirelessnetworkshavemotivatedthedevelopmentoflocationbasedservices(LBS)applications.However,mostofthepositioningmethodsspecificallydesignedforeitherindoororoutdoorandtheiraccuracyandprecisiondiffersgreatly,soit’sdifficultusingonlyonepositioningmethodtomeetallpeople’sdemands.ThispaperproposesanewarchitectureforubiquitouslocationbasedservicesinTDSCDMA.Inthisarchitecturetheproperpositioningmethodsaredeterminedbytheuses’surroundingsandthedemandsofaccuracyandprecision,andtheproblemthattheuser’senvironmentschangehasbeenalsoresolvedcommendably.Andthisarchitecturesolvestheproblemthatenvironmentchangeswhilepositioning.Thesimulationshowsthateveryonecanusethelocationbasedservicesanywhereandanytimewiththemobileterminalthroughthisarchitecture.
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