摘要： 针对移动Ad-hoc网络中存在路由不稳定、数据丢包率高的问题,提出一种基于节点信号强度的AODV路由协议AODV-SS,该协议在原路由协议的基础上增加了节点的信号强度和路由警告消息机制,将节点的信号强度作为建立路由的一个参照指标,当节点的信号强度较低时将不考虑该节点,寻找信号强度好的节点作为中间节点。在已建立好的路由中,若某个节点的信号强度低于一定的值时,将发出一个路由警告通知上游节点和源节点重新寻找新的路径。NS2仿真实验结果表明,当节点信号强度低于临界点时,改进路由协议的丢包率比AODV路由协议低,路由更加稳定。

关键词: 移动自组织网络, AODV协议, 路由请求, 路由维护, 信号强度

Abstract: This paper improves Ad-hoc On-demand Distance Vector(AODV) routing protocol and proposes AODV-Signal Strength(AODV-SS) routing protocol which is based on signal strength of node.The AODV-SS routing protocol increases the warning message of routing and signal strength of node.The signal strength as a reference indicator when it establishes the routing.It does not consider this node if the signal strength of node is lower than critical point when establishing the routing.It finds a node as intermediate node of which the signal strength is better than critical point.In the established route,it sends a warning message of routing to the upstream node and the source node when the signal strength is lower than critical point.Simulation experimental results of NS2 show that the improved routing protocol packet loss rate is lower than AODV routing protocol when the signal is not good,and the route is more stable.

Key words: mobile Ad-hoc network, Ad hoc On-demand Distance Vector(AODV) protocol, Route Request(RREQ), route maintaining, signal strength

中图分类号: 

• TP391