Retransmission or redundancy:Transmission reliability study in wireless sensor networks

查看全文 作　　者：WEN [1]Hao;LIN [1]Chuang;REN [1]FengYuan;ZHOU [1]Jia;YUE [2]Yao;HUANG [1]XiaoMeng

机构地区：[1]Department of Computer Science and Technology,Tsinghua University,Beijing 100084,China;[2]Department of Computer Science,CorneU University,Upson Hall 4161,NY,USA

出　　处：《Science China(Information Sciences)》索引2012年第55卷第4期,共10页

基　　金：supported in part by National Natural Science Foundation of China(Grant Nos.60773138,60971102,60932003);National Grand Fundamental Research Program of China(Grant No.2009CB320504);National High-Tech Research & Development Program of China(Grant Nos.2008AA01Z212,2010CB328105);National Science and Technology Major Project of China(Grant Nos.2009ZX03006-001-003,2009ZX-03006-003-01) 摘　　要：As an application-driven network,wireless sensor network generally requires data reliability to maintain detection and response capabilities.Although two approaches,namely,retransmission and redundancy,have been proposed to enhance data reliability,the theoretical work is required to evaluate their impact on transmission reliability and energy efficiency.In this paper,we offer a comprehensive theoretical study on packet arrival probability and average energy consumption for both approaches.Our analysis and simulations indicate that when loss probabilities remain low or moderate,erasure coding,a typical redundancy-based scheme,is more energy efficient than retransmission.We also demonstrate that the resistance capability of erasure coding against packet loss weakens as the hop number increases,which motivates us to propose two improved mechanism based on the idea of the loss detection and the loss recovery.Finally,the simulation results carried out using TOSSIM verify the performance of different mechanisms both in the chain topology and the tree topology. 关键词：无线传感器网络传输可靠性冗余方案可靠性检测数据包丢失能源效率仿真结果损失概率

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Retransmission or redundancy:Transmission reliability study in wireless sensor networks

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