一种相邻节点协作的无线传感器网络可靠传输方案  

Reliable Delivery Scheme for Wireless Sensor Networks Based on Cooperation among Neighboring Nodes

作　　者：方维维[1] 钱德沛[1,2] 刘轶[1] 

机构地区：[1]北京航空航天大学中德软件技术联合研究所,北京100083 [2]西安交通大学电子与信息工程学院,西安710049

出　　处：《西安交通大学学报》2009年第2期33-37,共5页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(90412011,80612004,60673180);科技部国际科技合作计划资助项目(2006DFA11080);德国教研部资助项目(01BU0680)

摘　　要：针对无线传感器网络中不可靠的通信链路引发传输效率下降的问题,提出了一种基于相邻节点协作的无线传感器网络可靠传输方案(NNCS).该方案利用无线信道的广播特性,通过选择成功监听到数据传输的相邻节点来承担协作传输任务(重传或转发),以降低重传次数,提高传输效率.在方案中,相关节点根据自身传输能力发送数据应答以竞争协作机会,同时通过信道监听避免发生竞争冲突.实验结果表明,较之传统重传方案,NNCS能够以更少的传输消耗达到更高的传输成功率,并有效降低了端到端的传输时延.To solve the transmission efficiency degradation problem in wireless sensor networks （WSN） due to unreliable communication links, a novel scheme NNCS that is based on cooperation among neighboring nodes is proposed for reliable data delivery in WSN. The NNCS exploits the broadcast feature of wireless channels, and passes the retransmission or forwarding responsi- bility to a neighboring node that has successfully snooped the data transmission, so as to achieve better transmission efficiency by reducing retransmission times. In the NNCS, related nodes compete for cooperation tasks by sending data acknowledgement according to their transmission capabilities, and snoop the channel activities to avoid interference in competition. The simulation results show that, compared with the traditional retransmission-based scheme, the NNCS can achieve a higher transmission success probability with lower cost, and effectively reduce the endto-end transmission delay.

关 键 词：无线传感器网络 协作通信 可靠传输 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]