Scheme of opportunistic spectrum access based on POMDP in cognitive radio networks
Huasen Wu · Jisuanji gongcheng yu sheji · 2011
To take full advantage of prior information and use the free frequency adequately,a scheme of opportunistic spectrum access based on POMDP is proposed aimed at the problem of accessing with multichannel environment in cognitive radio networks.Firstly,the scheme use POMDP theory to choose the channel with the biggest free probability to access according to the result of sensing.Further-more,the send-time and sleep-time are also optimized according to the correlation of channel.Simulation results show that the probability of channel utilization is enhanced and the scheme can further optimize the frequency distribution.