6LoWPAN网络节点信道接入延时性能研究  

Channel access delay analysis of node for 6LoWPAN

作　　者：程宏斌[1] 王晓喃[1] 孙霞[1] 聂盼红[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》2013年第1期246-248,共3页Application Research of Computers

基　　金：江苏省自然科学基金资助项目(BK2009133)

摘　　要：为了优化6LoWPAN网络MAC协议性能,提出了一种基于饱和负载的时隙CSMA/CA机制的Markov链模型,并对协议主要网络参数进行了数学推导。基于该模型对节点平均接入延时及网络的信道接入概率等参数进行数值计算,重点分析了协议参数对网络延时性能的影响。数学分析表明,该模型较好地描述了基于饱和负载的IEEE 802.15.4 MAC协议的信道竞争接入机制,而合理的协议参数设置能够有效地改善网络节点平均信道接入延时性能。To optimize the performance of MAC in 6LoWPAN,this paper proposed a mechanism based on saturated traffic for slotted CSMA/CA algorithm,and it established a Markov chain model for it.Then,this paper gave ont an expression using the new model for calculating the main parameters.Furthermore,it carried out the numerical analysis based on the model of the node access delay and channel access probability,and analyzed the impact of protocol parameters to the node average access delays.Finally,by the theoretical analysis showes that the model describes the slotted CSMA/CA mechanism well,and reasonable settings for CSMA/CA parameters can improve the performance of node average access delay.

关 键 词：6LoWPAN 时隙CSMA CA 接入延时 参数 

分 类 号：TP393.03[自动化与计算机技术—计算机应用技术]