基于用户需求的改进型频谱资源分配算法

Advanced Spectrum Resource Allocation Algorithm Based on User Requirement

在无线通信中,对有限的频谱进行合理有效的分配是实现认知无线电技术的关键。针对认知用户需求的差异性以及用户需求得不到满足的特点,在图着色模型算法的研究基础上,提出了一种改进型频谱资源分配算法。该算法对用户需求和系统效益进行分析比较,选择需求大且效益高的用户进行分配。随着分配过程的进行,实时更新用户的需求以提高用户的满足度。仿真结果表明该算法能使分配的信道尽可能地满足用户的需求,最小化用户未满足的带宽需求,提高了频谱的利用率,因此具有一定的优越性。

In the wireless communication, reasonable effective allocation in the limited frequency is the key to realize cognitive radio net work. According to the difference of the cognitive user＇ s requirement and the dissatisfied user＇ s demand, put forward an improved spec trum resource allocation algorithm by the research of the preceding spectrum allocation algorithms which were built on the graph coloring theory. Analyzing the user＇ s demand, comparing the requirement with the utility, it seeks the user who has the most demand and maxi mum utility and allocates it homologous spectrum. During the process of distribution,it updates the user＇ s needs to improve user＇ s satis faction. Simulation results indicate that this algorithm can make the allocated frequency meeting the user＇ s requirement as soon as possi ble, minimize the user＇ s unsatisfactory bandwidth demand and further raise the utilization rate of spectrum. So the advanced algorithm has superior in the performance.