关键词: 认知无线电,随机接入,不完全信息静态博弈,共享信道 Abstract It is reported that the lack of wireless frequency is a relative term where there's much more load depending on a small amount of frequency bands while other parts of them have fewer efficiency of utility. A concept of cognitive radio is proposed to solve this problem and to use the electromagnetic radio spectrum with flexibility. The cognitive radio is an intelligent wireless radio which is able to sense the outside world and to learn the information of surroundings with its artificial intelligence. It can communicate on a reliable basis at anytime and anyplace while using the frequency efficiently by changing real time operation parameters such as transmit power, carrier frequency and modulation code to accommodate the internal to the outside world. The primary principle of a cognitive radio is to avoid the negative influence upon the primary user's using the authorized frequency is the reason why the cognitive radio users have a dynamic set of the usable channels. The goal of this paper is to handle the access processes of the cognitive radio stations based on a scenario with dynamic channel source and try to improve the ou