An improved spectrum sharing algorithm in cognitive radio based on game theory
Ning Tang, Jun Sun, Shixiang Shao, Longxiang Yang, Hongbo Zhu · 2010
An important problem of cognitive radio (CR) is how to make use of spectrum resources effectively. Spectrum sharing is one of the key technologies for addressing problems. Based on the existing spectrum sharing scheme of non-cooperative game theory, an improved utility function of the secondary user is proposed by introducing a new reinforced factor which is based on spectrum occupancy of the secondary user. The reinforced factor could reflect the influence of spectrum occupancy of the secondary user on the price of tenemental spectrum and profit of the primary service better. Simulation results show the validity. The factor is suitable for the study of spectrum sharing in the scenario of multiple primary users and multiple secondary users.