摘要
通过对基于IEEE802.15.4的无线传感网络的非时隙CSMA/CA的算法进行分析,建立了适合于大部分无线传感网络实际应用的具有单步转移概率分布的离散马尔可夫链模型。并给出了在该模型下数据包延时、退避次数两个主要的网络性能评价指标的计算公式。最后通过仿真实验分析了CSMA/CA算法的三个网络参数对系统性能的影响。
On the analysis of the unslotted CSMA/CA of WSN by IEEE802.15.4,this paper establishes a distributed Markov chain model,which is of one-step transition probabilities and suitable for most WSN application.Moreover,this paper puts forward the calculation formula under this model for two main net property indexes,packet delay,and number of backoff.Finally,the influence of three net parameters of CSMA/CA algorithm on system property is analyzed by emulation experiments.
出处
《计算机工程与应用》
CSCD
北大核心
2009年第7期108-110,118,共4页
Computer Engineering and Applications
基金
重庆大学研究生科技创新基金(No.200701Y1B0220208)
