通过对最新的图论着色频谱分配算法进行分析,提出了一种基于用户需求和等待时间的改进型频谱分配算法.解决了频谱资源紧张情况下用户等待时间太长的问题.使认知用户机会均等地使用频谱资源.经过频谱复用,更好地满足了用户频谱需求.仿真结果表明该算法是有效的,提出的算法提高了频谱利用率并且保证了系统公平性.%With analyzing the latest spectrum allocation algorithms of graph-coloring theory, an improved spectrum allocation algorithm based on user demand and waiting time is proposed. It solved the users waiting for a long time in spectrum resource instances, making the cognitive users equal opportunities to use of spectrum resources. Through spectral multiplexing, the needs of users demand is better meeted. The simulation results show that the algorithm is feasible. The proposed algorithm improves the spectrum utilization and ensure system fairness.
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