无线传感网事务处理技术分析

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1、-------南京邮电大学硕士研究生学位论文AbstractAbstractWSN(WirelessSensorNetworks),anewtypeofdistributednetworkarchitecture,carriesthecharacteristicsofself-organization,mobility,disconnectionandenergylimitation.Itismainlybasedondataacquisitionapplicationsandcanbeintegratedwithexistingapplicationsasdatasource

2、s.HowtoensuretheeffectivenessandconsistencyoftheWSNdata,hasbecomearesearchhotspotinthefieldofWSNdatamanagement.Transactionswhicharethecollectionofaseriesofoperations,providereliablequalityserviceandensuredataconsistency.UncertaintyofconflictandlossofinformationexistinWSN;andabnormalnodeorcom

3、municationfailurewillleadtoadistributedtransaction-based2PC(TwoPhaseCommit)protocolblocking,2PCprotocolnolongerbeingsuitableforWSN,itisnecessarytoimproveandsimplify2PCcommitprotocoltoadapttotheWSNwithmessagelossfrequencyandenergylimitation.Thispaperputsforwardconceptsofupdateandquerytransact

4、ionsandimprovesthetraditional2PCtransactionprotocol.Thebasestation,asacoordinator,initiatestransactionsandbroadcaststransactioncontexttoallparticipatingnodes,whichproceedtousethetimerstocommitthetransactionsandsendAcknowledgeorConflictmessagebacktothebasestationaccordingtothetimeslot.Concurr

5、encycontrolstrategyusingforwardvalidationschemeofoptimisticconcurrencycontrol,conflictdetectioninthebasestationsideandsensorside,suspendedtransactionsduetoconflictarearousedbytriggermechanism.TheschemeensuresdataconsistencyandavailabilityofWSNapplication,andaccommodatesthefeaturesofWSN.Final

6、lyexperimentsaresimulatedbyusingTOSSIManditsfeasibilityisproved.-----------Keywords:WirelessSensorNetworks;TransactionProcessing;ConsistencyII-----------南京邮电大学硕士研究生学位论文专用术语注释表专用术语注释表英文缩写英文全称中文全称2PCTwo-PhaseCommitProtocol两阶段提交协议2PCwCTwo-PhaseCommitwithCacheProtocol基于缓存的两阶段提交协议ACIDAtomicity,Co

7、nsistency,Isolation,Durability原子性、一致性、隔离性、持久性CLCPCrossLayerCommitProtocol跨层提交协议DBMSDatabaseManagementSystem数据库管理系统DDLSFData-DeadlinebasedLeastSlackFirst空余时间最少最优先调度策略EDDFEarliestData-DeadlineFirst截止期最早最优先调度FDForcedDelay强迫延迟调度策略M-2PCMobileTwo-PhaseCo