摘要
Indexingtechniqueshavebeendevelopedforwirelessdatabroadcastenvironments,inordertoconservethescarcepowerresourcesofthemobileclients.However,theuseofinterleavedindexsegmentsinabroadcastcycleincreasestheaverageaccesslatencyfortheclients.Inthispaper,thebroadcast-basedspatialqueryprocessingmethods(BBS)arepresentedforthelocation-basedservices.IntheBBS,broadcasteddataobjectsaresortedsequentiallybasedontheirlocations,andtheserverbroadcaststhelocationdependentdataalongwithanindexsegment.Then,asequentialprefetchingandcachingschemeisdesignedtoreducethequeryresponsetime.Theperformanceofthisschemeisinvestigatedinrelationtovariousenvironmentalvariables,suchasthedistributionsofthedataobjects,theaveragespeedoftheclientsandthesizeoftheservicearea.
出版日期
2005年06月16日（中国期刊网平台首次上网日期，不代表论文的发表时间）
