【摘要】 如何生成优化的梯度是传感器网络定向扩散中的一个关键问题,本文在分析一种基本梯度生成算法的问题基础之上,利用兴趣包的转发次数对其进行改进,设计了一种分布式的最短路径梯度生成算法.该算法极大的降低了邻居节点间建立"平行梯度"和"逆向梯度"的概率,可构建从源节点到sink节点的多条最短路径.仿真表明,改进的算法可建立更为有效的梯度,从而使得定向扩散中数据报文沿着更短的路径传输,无线传感器网络的能量利用率更高.更多还原

【Abstract】 How to set up good gradients is crucial for directed diffusion in wireless sensor networks.Based on the research of one basic gradients setup algorithm’s problem,utilizing interest packet’s forwarded times,this paper presents a distributed shortest-path gradients setup algorithm for directed diffusion.The improved algorithm greatly decreases the probability to build "parallel gradients" and "reverse gradients",and construct multiple shortest paths from source node to sink node.The simulation results show,this shortest-path gradients setup algorithm can set up more efficient gradients,then data packets will be delivered along shorter paths,and directed diffusion for wireless sensor networks is more energy efficient.更多还原