Research Of Spectrum Allocation Algorithm In Cognitive Radio Network

Wireless network communication get rid of the constraint that the cablecommunication communication equipment position is fixed, easy to communicateanytime and anywhere, well received by users. With the development of wirelessnetwork technology and the and the constantly emerging of new technology, thedemand for radio spectrum resources is also growing fast, it becomes more and morelack of spectrum resources. However, the traditional spectrum management mode isstatic, although static wireless spectrum management style is simple and effective toavoid the mutual interference between different wireless communication system, isadvantageous to the network planning, operation,maintenance and management, butmake the wireless spectrum resource utilization rate is extremely low. In this context,Cognitive Radio technology has been extensive research and development already.andthe academe and industries pay much attention to cognitive wireless network.Cognitive Radio Network development faced with many new requirements andnew challenges, this paper This paper have deep research of spectrum allocationalgorithm in cognitive radio network, analyze the model of spectrum allocationalgorithm, propose new spectrum allocation algorithm, obtain the certain theory andtechnology achievements, mainly include the following two parts:(1) Discuss the spectrum allocation algorithm model based on graph coloringtheory and a spectrum allocation algorithm based this model using genetic algorithm,a based on pareto optimality multiple-objective GA spectrum allocation algorithm areproposed, this algorithm can maximize the utilization of spectrum resources, improvethe maximum efficiency and the fairness of the system; meanwhile a new algorithmand traditional genetic algorithm was adopted to realize the spectrum allocationalgorithm, simulate the algorithm performance, the simulation results show that a newalgorithm has superior in maximum efficiency of the system and the utilization rate ofspectrum, or spectrum allocation of fairness.(2) Discuss the auction spectrum allocation algorithm, a multiple-objective baseddouble auction spectrum allocation algorithm are proposed,this algorithm use double auction, in the auction process to find to meet the requirements of multiple objectiveconditions of primary users and cognitive users and trade; simulate the algorithm inthe spectrum allocation efficiency and benefits, the simulation results show that thealgorithm improve spectrum utilization and overall considerate all kinds ofperformance requirements in network system.