认知Ad-Hoc网络中一种实时信道分配路由协议

A real-time channel allocation routing protocol for cognitive radio Ad-Hoc network

针对认知无线Ad Hoc网络中授权用户的活动将影响认知用户间路由稳定性的问题,提出了一种实时信道分配路由协议。该协议采用动态源路由协议(DSR)的路由发现机制,在路由建立阶段,提出综合路由度量标准来选择路由;在数据发送阶段引入IN MESSAGE数据包,使路由中间节点可以掌握其下一跳节点信道环境的变化,从而进行实时信道分配。仿真对比表明,实时信道分配路由协议有效提高了分组的投递率,减少了路由重建次数。

In cognitive radio Ad-Hoc networks, the stability of a route is highly influenced by the behavior of the primary users. In order to adapt this circumstance, a real-time channel allocation routing protocol（RT-CAR） was proposed. The RT-CAR protocol adopts the discovery mechanism of the dynamic source routing （DSR） protocol. In routing establishing stage, an integrated routing metric is proposed to select the route. In data transmission phase, IN MESSAGE packets were introduced to transmit the SOP infor- mation between the adjacent nodes. So that the intermediate nodes can grasp the channel environment of their next hop to realize the real-time channel allocation. Simulation shows that the RT-CAR protocol improves the packets delivery ratio effectively, and it has a fewer route reconstruction times.