无线传感器网络空间复用问题研究

Research on spatial multiplexing in wireless sensor networks

分析了无线传感器网络空间复用问题产生的因素,发现无论采用何种随机接入方式,物理因素(节点个数、节点密度)和几何因素(发射半径、面积比)等对无线传感器网络空间复用性的影响均呈现出特定的变化规律。通过定义空间复用率,定量地刻画了空间复用性,通过分析实验所采集的大量数据并借助于曲线族拟合法,得出了空间复用率、节点数、面积比三者之间满足由曲面方程所确定的数学模型。研究方法具有一般性,研究结论可以为无线传感器网络的节点布置及拓扑控制等提供理论上的指导。

This paper discussed spatial multiplexing in wireless sensor networks. No matter how the random media access method performed, physical factors （ e. g. number of nodes, density of network） and geometrical factors （ e. g, nodes＇ radio radius and area ratio） produced an effect on WSNs＇ spatial multiplexing. Further more, these factors and spatial multiplexing were in special relationships. Spatial multiplexing radio quantitatively described spatial multiplexing. Based on massive data collected by trials, done a series of curve family fitting was and decluced a conclusion that spatial multiplexing ratio, number of nodes and area ratio obey the special quantitative model. Due to universality of the research, the results of this paper can be a guide to wireless sensor network＇ s node placement and topology control.