Abstract
提出了一种基于用户分配和负载的频谱分配算法.该算法包括两部分:用户分配子算法和频谱分配子算法.用户分配子算法首先基于聚类划分理论,使分配到相同访问点下的用户具有相近的信噪比,缓解了无线接入网络中普遍存在的远近效应问题.在该用户分配基础上,频谱分配子算法根据各访问点的负载及其关联用户信噪比的平均值计算最优频谱分配.该算法具有可实现性、多项式时间的计算复杂度以及比例公平性.真实数据驱动的仿真实验结果表明,该算法能够有效地提高系统吞吐量,同时大幅度减小访问点的报文缓冲区队长.
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