Research on Cognition of Heterogeneous Wireless Networks

With the broadband development of mobile network and the mobility development of broadband networks, all-IP based heterogeneous networks coexistence and integration is becoming an important feature of next generation wireless networks.This Paper firstly summarized the evolution and development tendency of heterogeneous wireless networks, then introduced and analyzed the cognitive radio and cognitive network technologies. Also the difficult Problems for future cognitive heterogeneous networks were also addressed on.