基于概率可通链路的无线传感器网络栅格路由

该文基于一种通用的概率可通链路模型，分析了相邻栅格可通概率和路径可通概率，研究了节点密度和栅格大小对它们的影响，分别给出了以能量效率和网络平均分组递交率为目标的最佳栅格大小，并提出了将二者结合的最佳栅格选择标准，在满足用户需求的前提下网络寿命达到最大。最后对其性能进行了仿真分析，结果表明在考虑了概率可通链路后的最佳栅格大小与分析结果非常接近，且分组递交率和能量效率相结合的栅格大小选择标准能够很好的延长网络寿命。

Grid Routing Based on Link Reachable with Probability in Wireless Sensor Networks

In this paper, the optimal grid size is studied based on link model reachable with probability in realistic environment. Reaching probabilities of neighboring grids and path are analyzed, and the effects of node density and grid size on reaching probabilities is studied, and optimal grid size of which maximize energy efficiency and network average packet delivery ratio is analyzed theoretically. A scheme of combination of packet delivery ratio and energy efficiency to select grid size is proposed, which maximizes network lifetime when meet user’s requirements. The grid routing is simulated and analyzed, the results show the optimal grid size of theoretical value and simulation value to be equal almost, and the grid size selecting scheme of combining packet delivery ratio and energy efficiency can prolong network lifetime efficiently.