传感器网络中基于事件信息量的公平性控制

在分析无线传感器网络现有公平性控制方法的基础上,依照新的公平性控制的基本原则实施带宽分配,即事件信息量是节点传输的有效信息量,公平性带宽分配是按事件信息量的比例来分配,如何计算带宽竞争节点所传的事件信息量是实现该基本原则的关键.针对事件信息均匀分布的情况,提出了以事件信息量为基础的公平性控制(EFFRC,event faith based fair rate control)算法,该算法将事件信息量的计算转换为事件区域大小的计算,并通过区域细分,将任意形状的事件区域大小的计算转换为若干四边形区域大小的求和,从而达到信息量计算的目的.实验表明,EFFRC算法能够有效计算事件信息量,实现公平的带宽分配.

Faith based congestion fairness control in wireless sensor networks

A new basic fairness control principle was applied to assure the equal bandwidth-sharing for the link from nodes-to-sink in wireless sensor networks (WSN). Thus, a new fairness congestion control algorithm (called EFFRC) was proposed which was based on the amounts of event information. To bypass the difficulty of calculating the amounts of event information, the algorithm calculated the size of the potential event region of the node instead of the amounts of event information. To facilitate calculating the area of the event region, it was subdivided into several quadrilateral ones, and then the area of the region was the sum of the area of all separate ones. The experiments results show that EFFRC is capable of effectively calculating event information as well as achieving the fair allocation of bandwidth.