基于单跳通信的IEEE 802.15.4 WSNs数据传输可靠性优化  

Optimization of data transmission reliability for IEEE 802. 15. 4 WSNs based on single-hop communication

作　　者：程宏斌[1] 孙霞[1] 王晓喃[1] 乐德广[1] 

机构地区：[1]常熟理工学院计算机科学与工程学院,江苏常熟215500

出　　处：《计算机应用研究》2016年第7期2110-2112,2134,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(61202440);江苏省自然科学基金资助项目(BK20141230)

摘　　要：针对IEEE 802.15.4 WSNs数据传输可靠性优化问题,提出了一种基于单跳通信的信道竞争算法模型。基于模型的数学推导,研究了MAC层数据包传输可靠性的影响因素,然后建立了可靠性性能指标的数学分析式;最后研究了协议参数minBE、NB和N对可靠性的影响,并分析了参数配置对信道接入失败和重传次数的影响。研究表明,相对于无休眠态的信道竞争算法,在网络规模较大时可靠性提高了94.5%,提出的算法模型能够有效改善数据传送的可靠性性能。Aimming at the optimization problems of the reliability of data transmission in IEEE 802.15.4 WSNs, this paper proposed a model of channel competition algorithm, and studied the factors impacting to packet transmission reliability in MAC layer based on the mathematical derivation of model. And then it established the mathematical formula of the reliability performance. At last, the paper researched the influence of the protocol parameters such as minBE, NB and N to the reliability, and analyzed the effect of parameters configuration to the channel access failure and the of retransmission times. The research show that, compared with channel competition algorithm without node sleep state, the data packet reliability performance is increased by 94.5% in large scale network. The algorithm model improves the performance of data transmission reliability effectively.

关 键 词：可靠性 信道竞争 媒体接入控制 参数 

分 类 号：TN915.04[电子电信—通信与信息系统]