Research on Spectrum Sharing of Cognitive Satellite Network Based on Blockchain

With the rapid expansion of wireless Internet services, the number of users in wireless communication systems has increased exponentially, which requires more spectrum and continuous bandwidth. Due to the current fixed spectrum access policy, the available spectrum is less and less, and a large number of spectrum is still not fully utilized. Dynamic spectrum management is an effective method to realize spectrum sharing, which can realize the effective utilization of spectrum resources. Cognitive radio network is the key technology to realize dynamic spectrum access. This paper studies the spectrum sharing method of cognitive satellite network, analyzes the advantages and disadvantages of the current dynamic spectrum access mechanism, and puts forward the spectrum sharing system of cognitive satellite network based on blockchain, which not only realizes the maximum utilization of spectrum, but also solves the security problem of dynamic spectrum access. The basic principle of this method are described in detail.