无线传感器网络生命周期延长算法研究

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1、中国海洋大学博士学位论文无线传感器网络生命周期延长算法研究姓名：窦金凤申请学位级别：博士专业：物理海洋学（海洋技术）指导教师：郭忠文200806014)针对前面提出的混和传输存在的问题：节点必须能与基站sink直接通信，不适合于大规模传感器网络。又提出了一种异构节点分布传感器网络设计方案。针对水下传感器网络的特征，设计了基于延迟时间的竞争机制，这个机制考虑到带宽容量受限，提供了一个中转节点选择方法。接着，提出了一个异构节点分布策略以均衡整个水下传感器网络的能耗。然后，分析了水下传感器网络中相邻圆环的初始能量之间

2、的关系及成本约束，为选择节点初始能量时提供了参考，仿真验证了其有效性。5)引入了数据融合率的概念来说明传感器网络中节点的压缩能力。改变了传统的假设条件，提出了一个新的假设条件。传统的假设可视为新假设的两个特殊情况。从理论上给出了数据融合率、网络生命周期和基站接收的信息量之间的关系，通过仿真验证了理论的正确性。期关键词：传感器网络；水下传感器网络；路由算法；能量平衡；网络生命周ResearchofNetworkLiletimeProIongingAIgorithmsforWireIessSensorNetwork

3、sAbstractWirelessSensorNetworks(WSNs)，whicharemadebytheconvergenceofsensor,micro—electro·mechanismsystemandnetworktechnologies，isanoveltechnologyaboutacquiringandprocessinginformationandcanbeusedtotransferinformationtotheterminalusers．Theyarewidelyusedinmili

4、taryandcivilapplicationsinterrestrial，underwater,undergroundandmanyotherfields．Wirelesssensornetworksmainlyusewirelessradio，acousticcommunicationtechnologyandSOon．Wirelesssensornetworksusuallyoperateinallunattendedenvironmentwithlimitedenergy．ThebatteryCanno

5、tberecharged．Therefore，minimizingenergyconsumptionandprolongingthenetworklifetimearekeyrequirementsinthedesignofsensornetworkprotocolsandalgorithms．ThispaperfocusesonlifetimeprolongingstrategiesforterrestrialWSNsandUnderWaterSensorNetworks(UWSNs)．Themaincont

6、entofthispaperisdividedintofiveparts．●Thispaperintroducesalloptimumradiorange，consideringthebalancebetweenthetransmissionenergyconsumptionandthereceivingenergyconsumptiontominimizetheenergyconsumptioninmulti—hopcommunication．Asub-optimaldistancebaLsedmulti-h

7、opmutingalgorithmisproposed．inwhichtherelayisselectedrandomlyinalocalcircle．Thus，thesensornodesneartheoptimumradiorangeareselected觞therelays．AnoptimumtransmissionrangeisalsopresentedtoprolongthenetworklifetimeforUWSNs．Thisstudyisbasedonthedifferentdefinition

8、softhenetworklifetimeandthecharacterofunderwateracousticsensor．Therefore，itprovidesnotonlyagaugeforperformanceevaluationofUWSNsbutalsoaguidelineforthedesignofUWSNsprotocols．Simulationsshowthatth