摘要
选取一种典型的基于地理位置信息的路由协议——LAR协议进行深入的研究,并针对LAR协议的不足提出一种改进路由协议——ILAR协议。在建立路由的过程中,ILAR综合考虑了到目的节点的距离与链路保持时间这两个参数,在邻居表中选择有限个节点作为转发节点,不仅减少了控制开销,同时提高了数据传输的成功率。此外,ILAR在找不到路由时,通过局部泛洪来重新寻找路由,避免了全网泛洪,进一步减少了网络中的控制开销。模拟结果表明,该路由算法在分组投递率以及控制开销等方面都有较大的改善,减少了网络拓扑结构的变化对路由的影响,极大地提高了网络性能。
This paper engages in intensive study on a typical routing protocol based on geographical position Location Aided Routing （LAR） and puts forward an Improved Location Aided Routing （ILAR） in allusion to the inefficiency of LAR. ILAR protocol consides the distance from routing node to the destination node and the link holding time between them when the transmission node is ehosen, whieh guarantees more stable established path, lower loss rate in the transmission of data, and reduces the control consume effectively. Furthermore, when source node can not find any path to destination node, ILAR re-builds routing path through local flooding instead of global flooding in LAR to further reduce the netwok control overhead. Simulation results show that, compared with LAR, the successful packet arrival rate of the ILAR significantly increases and the control grouping consume dramatically decreases.
出处
《计算机与现代化》
2009年第9期36-39,共4页
Computer and Modernization
