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1、AbstractAmajorlimitationofwirelessnetworksisfinitebatterycapacity一nodeswilloperateforafiniteduration.onlyaslongasthebatterylast.Wirelesssystemscomprisedofrechargeablenodeshaveasignificantlyprolongedlifetimeandaresustainable.Adistinctcharacteristicofthesesyst
2、emsisthefactthatthenodescanharvestenergythroughoutthedurationinwhichcommunicationtakesplace.Assuch,transmissionpoliciesofthenodesneedtoadapttotheseharvestedenergyarrivals.Wirelesssystemswithenergyharvestingabstractmoreandmoreattention,becauseoftheflexibledep
3、loying,convenientmaintenanceandenvironmentalfriendlyFirstofall,theoptimaltransmissionstrategyofasinglenodewithenergyharvestingisanalyzedintheperspectiveofoptimizationproblems.Further,atwo-hoprelayinginthepresenceofenergyharvestingnodesisconsidered.Therelayne
4、tworkiscomposedofapoweredsource,aninfiniterelaynodewithenergyharvesting,andadestination.Simulationsshowthattheminimumcompletiontimedecreaseswhentheenergyofthesourceincreases.Whentheenergyofsourcereachesacertainvalue,theminimumcompletiontimewillbecometostable
5、.Inaddition,amoregeneralcaseisconsidered.Thepowerlimitedoftherelaynodeisconsidered.Thenumberoftheenergyharvestedbyrelaynodeisassumedtobe2.Accordingtodeduction,anoptimaltransmissionstrategyofminimumcompletiontimeisshown.Simulationsshowthatthemaximumamountofda
6、tathatcanbetransmittedislimitedbytheenergyofthenode.Theminimumcompletiontimedecreaseswhentheenergyofthesourceincreases.Finally,acompareofthetransmissionstrategiesbasedontwo-hoprelayingsystemisgiven.Inordertodeepenunderstanding,thedifferencesofseveraltransmis
7、sionstrategiesareanalyzed.Keywords:Energyharvesting,relaysystem,transmissioncompletiontimeminimization,optimalscheduling,convexoptimization^目录1.1引言11.2研究背景21.3研究意义41.4论文研允内容以及章节安排5第二章凸优化和能量收集基础知识72」凸优化问题72.1.1凸优化问题描述72.1.2拉格朗日对偶法82.1.3KKT条件92.2香农定理102.3能量收集技
8、术112.3.1能量收集概述112.3.2能量收集体系架构112.3.3能量资源122.3.4能量转化机制122.3.5存储技术142.3.6典型能量收集系统142.4本章小结15第三章中继节点容量无限最优传输策略163.1引言163.2带有能量收集的单节点传输特性173.2.1单节点能量收集描述173.2.2单节点最优传输策略特性173.2.3单节点最优传输策略算法223.3中继系统
