采用方向性天线的ad hoc网络路由协议研究

Research on routing in ad hoc networks using directional antennas

为了降低方向性天线扫描路由发现的开销和代价,有效利用方向性天线的高空间复用度和高传输能力,提出一种采用方向性天线的adhoc网络位置信息辅助的按需距离矢量路由协议DLAODV,协议以按需方式获取网络节点的位置信息,结合泛洪、受限泛洪、路由压缩、位置信息修正的贪婪转发策略以及分区桥接策略,充分利用方向性天线优势,有效提高路由发现效率,路由区分维护策略有效降低了路由维护开销。仿真结果显示,DLAODV能够使得网络获得高吞吐率、低时延和开销性能,相比采用全向天线的AODV协议性能获得了明显提升。

To decrease overload and cost of routing discovery through directional antennas and effectively make use of high spatial reuse and high transmission ability of it, a routing protocol, called DLAODV （using directional antennas and location-aided ad hoc on-demand vector routing）, was proposed. In DLAODV, location information was got on demand. During route discovery, flooding, limited flooding in expected zone, routing contraction, location correct-based greedy forward strategy and method to resolve partition of the network were combined to improve the performance. In addition, a novel method for routing maintenance was illustrated. Simulation results show that, DLAODV can achieve better performance in packet delivery ratio and delay, and routing overhead is significantly decreased.