摘要
针对监测覆盖效果最佳的正六边形,利用随机几何理论建立无线传感器网络模型,并根据节点分布情况,推导计算节点距离的累计分布函数和概率密度函数。采用功率控制机制,研究CSMA协议下的网络中断概率和网络传输容量。仿真结果表明,正六边形覆盖监测区域内的系统中断概率较低,网络传输容量较大。空间分组密度、网络编码效率、退避次数和重传次数决定了网络传输容量的大小,这为研究无线传感器网络的传输性能提供了理论参考依据。
Transmission capacity is one of the important performance indicators in wireless sensor networks. This paper applied stochastic geometry theory to establish the network model under regular hexagon,and according to the nodes distribution,it calculated the cumulative distribution function and the probability density function. Meanwhile,this paper studied the system outage probability and transmission capacity in CSMA protocol based on power control. The simulation results show that the system outage probability is lower and transmission capacity is larger in regular hexagon. Furthermore,the space packet density,coding efficiency,backoff times and retransmission times determine transmission capacity. These provide theoretical bases for future research of transmission performance of wireless sensor network.
出处
《计算机应用研究》
CSCD
北大核心
2017年第5期1468-1472,共5页
Application Research of Computers
基金
国家自然科学基金资助项目(61163051)
关键词
正六边形
无线传感器网络
传输容量
随机几何理论
中断概率
regular hexagon
wireless sensor networks
transmission capacity
stochastic geometry theory
outage probability
