无线移动自组织网络中的定向广播算法

Beamed Broadcasting in Wireless Mobile Ad Hoc Network

在无线自组织网络(MANET)中,收集可靠的全局拓扑信息是不可行的。因此,在网络拓扑信息未知的前提下,广播成为AdHoc网络必不可少的通信方式。然而,由于无线信号在同一区域内很可能会重叠,直接用洪泛法进行广播将导致分组的过多转发、信道竞争和冲突,即广播风暴问题。为解决这个问题,现阶段提出的许多路由协议要么可到达性低,要么计算开销量大。本文提出了一种新型广播算法:定向广播算法,该算法减少了重传,获得了较高的可到达性,具有较低的能量和带宽消耗性能。

In Wireless Mobile Ad hoc Network (MANET), collecting reliable global topology information is pro- hibitive. Thus without prior knowledge of network topology,Broadcasting provides an indispensable means of com- munication in Ad hoc networks. However,as radio signals are likely to overlap with others in a geographical area, straightforward broadcasting by flooding usually result in redundant retransmission,contention,and collision,referred to as broadcast storm problem. A number of routing protocols have been put forward recently to alleviate broadcast storm problem. But all of them either lack reachability and involve high computational overhead. This paper presents a Beamed Broadcasting Protocol that provides a new method of broadcasting with reduced retransmission,high reacha- bility,and low power and bandwidth consumption.