Dynamic spectrum variation real-time routing algorithm in cognitive radio networks

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.