采用定向天线的MANET邻居发现算法研究

On neighbor discovery in mobile Ad Hoc networks with directional antennas

在无线多跳移动自组织网(MANET)中采用定向天线(特别是波束成形天线)有一系列优点。这一技术能增加单跳传输的距离、减小干扰、提高空间复用度,从而能显著增大系统容量。然而,适应于采用全向天线的传统MANET的媒质接入控制(MAC)、功率控制、邻居发现、路由等方法必须作相应的修改。在分析前人相关研究的基础上,针对MANET使用定向天线情况下的邻居发现机制及算法进行了深入研究,提出了2种采用定向天线的MANET的邻居发现算法———非辅助TD模式的定向邻居发现算法与非辅助TRD模式的定向邻居发现算法。这2种算法与目前已提出的其他定向邻居发现算法的最大区别是,它们不需要依赖GPS或其他辅助信息就能独立实现邻居发现。

The apphcation of directional antennas, especially beam-forming antennas, has a series of advantages in mobile Ad Hoc networks （MANET）. This technology can increase transmission range of a single hop, reduce interference, improve the spatial reuse and then expand the capacity of the networks obviously. However, such technologies as medium access control, power control, neighbor discovery and routing, which are suitable to conventional MANET, have to be modified. Based on the relevant work accomplished by predecessors we focus on examination of the neighbor discovery mechanism and algorithm of MANET using directional antennas. We propose two new neighbor discovery algorithms for MANET with directional antennas. The first is TD （ Transmit Directionally only） mode of the neighbor discovery algorithm with directional transmitting and omni-directional receiving. The second is TRI） （Transmit and Receive Directionally） mode of the neighbor discovery algorithm with directional transmitting and directional receiving. Both of them do not need GPS or other information supporting.