在认知无线电网络中，对图着色频谱分配算法进行了分析，发现只有少数已有算法考虑到用户的需求是否得到满足，导致需求低的用户分配到过多资源。为解决这个问题，根据基于用户需求的图着色论频谱分配算法，对用户的满意度设置优频谱分配优先级函数，满意度差的用户进行优先选择分配，得到一种改进算法。仿真结果表明，基于用户需求的频谱分配算法的改进算法，能够增加系统的信道效益，提高用户的需求满意程度。% By analyzing the spectrum allocation algorithms of graph coloring theory in the Cognitive Radio(CR) network,it is found that just a few in existing algorithms have considered whether the requirements of users are satisfied,which results in excessive allocation of resources to users with less demands. In order to solve this problem, the spectrum allocation priority functions are set based on user requirement algorithm,and the users whose needs have not been satisfied yet,are preferentially assigned. Then an improved algorithm is obtained. The simulation results show that the spectrum allocation algorithm based on user requirements can enhance the system channel efficiency,and improve the satisfaction of users.
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