认知无线电网络频谱动态变化实时路由算法

摘要

针对认知无线电网络中传统路由协议存在的缺陷,提出了一种频谱动态变化实时路由算法(DSVR).该算法在频谱动态变化过程中,利用马尔可夫状态转移,及时调整路由,在一定程度上对网络中的优质资源进行充分使用,且能获得更低的传输时延.最后,仿真结果表明,在信道可用率、可用信道数、节点个数为评估参数下,DSVR比传统路由协议具有更低的端到端平均时延.%Aim to the shortcoming of conventional routing protocols in cognitive radio networks,this paper proposed a dynamic spectrum variation real-time routing(DSVR)algorithm.The algorithm used the state transition of Markov chain and adjusted the route timely in the spectrum dynamic varation process,to make full use of the better network resources in a certain extent,and obtained the lower transmission delay.Finally,simulation results show that the average end-to-end delay of DSVR is lower than traditional routing protocols basing the evaluation parameters that are channel utilization,the number of channel and node.