无线传感器网络低功耗分簇路由算法研究

[e-mail]()20093Microcontrollers&EmbeddedSystems17u在基于层次路由算法的基础上,提出一种低功耗的分簇路由算法,采用非均匀分簇的网络结构,有效均衡了近基站簇首节点的能量消耗固定分簇后优先选择剩余能量较多的节点作为新簇首,并采用簇间转发的方式将数据发送到基站仿真实验表明,改进算法能有效地延长网络的生命周期无线传感器网络低功耗分簇生命周期路由算法(WirelessSensorNetworks,WSN),,,,,,,,,WSN1,HeinzelmanLEACH(Low-EnergyAdaptiveClusteringHierarchy,),,LEACH,WSN[1]M-LEACH(Mult-ihopvariantofLEACH,LEACH),,[2],,,WSN[3],,,/02,,WSN11,:¹;º;»;¼,;½;¾,[e-mail]()3LEACH/0,2:;,,;,,3.1,,,,,,,,,,,,,,,,,22,R0c,c,0~1siRc:Rc=1-cdmax-d(si,DS)dmax-dminR0c:dmax;dmin;d(si,DS)siDS,,CH_ADV_MSG;(),JOIN_CLUSTER_MSG3.2,TD_MAX,TD_MAX,;,d(A,DS)TD_MAX,A,Erelay=d2(A,X)+d2(X,DS),d(A,X)AX;d(X,DS)X;d(A,DS)AErelay,3.3,,:,,,,,3,,,,,,,,[e-mail]()20093Microcontrollers&EmbeddedSystems19,,43,,3,,3,3,:,,,,,,35,,,;,,;,,[1]BandyopadhyayS,CoyleEJ.Anenergyefficienthierarchicalclusteringalgorithmforwirelesssensornetworks:Proceed-ingsofINFOCOM2003[C],2003:1713-1723.[2]MhatreV,RosenbergC.Homogeneousvs.heterogeneousclusteredsensornetworks:acomparativestudy:Proceedingsof2004IEEEInternationalConferenceonCommunications(ICC2004)[C],2004:3646-3651.[3]MhatreV,RosenbergC.Designguidelinesforwirelesssensornetworks:communication,clusteringandaggregation[J].AdhocNetworksJournal,ElsevierScience,2004,2(1):45-63.[4]EstrinD.WirelesssensornetworkstutorialpartIV:Sensornetworkprotocols:ProceedingsoftheACMMobileCompu-tingandNetworking(MobiCom),Atlanta,GA,2002[C].[5]KrishnamachariB,EstrinD,WickerS.Theimpactofdataaggregationinwirelesssensornetworks:ProceedingsoftheIEEEInternationalWorkshoponDistributedEvent-BasedSystems(DEBS),Vienna,Austria,2002[C]:575-578.[6]MhatreV,RosenbergC.Designguidelinesforwirelesssen-sornetworks:Communication,clusteringandaggregation[J].AdHocNetworks,2004,2(1):45-63.[7]LiCF,YeM,ChenGH,etal.Anenergy-efficientunequalclusteringmechanismforwirelesssensornetworks:Proceed-ingsofthe2ndIEEEInternationalConferenceonMobileAd-hocandSensorSystems(MASS2005),Washington,DC,2005[C].宋杭选(硕士),主要研究方向为无线传感器网络;牛斗(副教授),主要研究方向为无线传感器网络嵌入式系统(收稿日期:2008-10-29)TriMode泰克公司宣布提供新型有源差分探头,和同时推出的DPO/DSA70000B全系列实时示波器一起,共同组成了优秀的示波器测试系统除以前提供的确立行业基准的13GHz16GHz和20GHz超高性能探头外,P7500系列探头现在还为4GHz6GHz和8GHz提供了高性能探头,所有这些探头均实现了快速上升时间低电路接入负载和独特的专利TriMode测量切换技术,提供了杰出的信号保真度TriMode探测技术实现了市场中未被满足的需求,使工程师能够在差分测量单端测量和共模测量之间随意切换,而不必移动探头连接每款P7500系列新探头(P7504P7506P7508)及家族中目前已有的探头(P7513P7516P7520)都提供了TriMode测量功能,实现了更高的效率和易用性另外对P7500系列探头的主体进行了简化,因此多个探头能够被放到限定的狭小空间中