移动自组织认知网络中的路由选择与信道分配方法

Routing Selection and Channel Assignment Method for Mobile Ad Hoc Cognitive Network

针对移动自组织认知网络中路由不稳定的问题,提出了一种路由选择与信道分配方法。首先,设计数据传输花费度量,兼顾路由稳健性和信道干扰;其次,依据认知节点的位置和速度信息计算链路剩余时间,预测路由稳健性;再次,针对不同的信道干扰模式实施信道分配,规避主节点干扰;最后,通过路由发现和路由确认步骤,选择最佳链路。仿真实验表明,与经典的AODV方法相比,所提方法丢包率低、传输时延小。

In order to solve the routing instability problem in mobile ad hoc cognitive network,a method of routing se- lection and channel assignment was proposed. First, it developes a data transfer costs measure, taking into account both routing stability and channel interference. Then, the remanding time of a link is calculated according to the position and velocity information of cognitive nodes, and the stability of routing is predictived. And then interference of primary nodes is avoided, through assigning channels according to different channel interference patterns. Finally, the best link is selected through two steps including route discovery and route confirmation. Simulation results show that, by comparing with the classical AODV method, the new method has lower packet loss rate and smaller transmission delay.