Research On The Application Of Blockchain In Cognitive Radio

The emergence of cognitive radio has greatly improved the problem of spectrum shortage.With the further development of wireless communication technology,the status of cognitive radio becomes more and more important.Blockchain,as a popular technology nowadays,breaks through the traditional trust barriers with its decentralized thinking,and is gradually spreading from the application in the financial field to all areas of society.Based on the characteristics of blockchain technology,this paper studies the three scenarios of power control,spectrum sensing and spectrum auction in cognitive radio.This thesis mainly has three innovations,mainly including the following aspects:(1)The application of blockchain in power allocation is studied.According to the needs of power allocation,a model of the blockchain system is constructed,and the workflow of the coordination of each module of the blockchain in power control is proposed.It is proposed to use improved particle swarm algorithm to handle power distribution in smart contracts.The particles with poor adaptability are processed in three ways: maintenance,mutation and jumping.Simulation results show that the algorithm has faster convergence speed than the ordinary particle swarm algorithm.(2)The role of blockchain in spectrum perception is studied.It is proposed to use reputation value,incentive mechanism and encryption technology in the blockchain to improve the security in the spectrum sensing process.Encryption technology is used to ensure the security of information transmission,and the user's behavior is regulated by the reputation value,and the user is guided by the incentive mechanism to be honest.It is proposed to use the smart contract as the fusion center to judge the three parts of information: personal assessment,joint recommendation,and joint perception.Simulation results show that this method has better stability.(3)This thesis designs a spectrum auction based on blockchain technology.By analyzing the technology and functions of each part of the blockchain technology,a blockchain trading platform is built from 0 to 1.Based on the Vickers auction on this platform,the spectrum operation is visualized.Through the technical selection of consensus mechanism,encryption technology,distributed data storage,etc.,and the use of front-end and server-side related technologies,a decentralized application has been made.