Dynamic Spectrum Allocation Strategy for Cognitive Radio Based on Game Theory
For the defects of low system revenue and unsatisfactory spectrum utilization in the process of spectrum allocation in wireless network,the interference price is introduced to control the interference caused by cognitive users'transmission power,a spectrum leasing model is established,and a dynamic spectrum allocation strategy under non-cooperative game is proposed to im-prove spectrum utilization and system revenue.Creating the utility function under the non-cooperative game,deducing the Nash equilibrium solution,and determining the utility weight factor after weighing the network utility.Experimental results show that the optimal transmission power of the proposed algorithm is small,the spectrum utilization rate is high,and better system benefits can be obtained.
Cognitive radioGame theorySpectrum allocationNash equilibriumUtility function
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