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为了满足OFDMA-WLAN系统下行通信中多用户的不同业务需求,提出一种基于公平性和QoS服务保障的资源分配算法.不同的QoS要求被转换成不同的速率要求来计算QoS满意等级;优化目标被修改为公平性驱动的优化函数以提供公平性保障;复杂的资源分配问题被划分为信道分配和功率分配问题,并通过二分图匹配和注水法得到分配结果.与其他算法相比,所提出的算法牺牲了较少的数据速率换取更高的公平性和QoS满意度.仿真结果表明所提算法具有保障QoS和公平性的能力,且在QoS、公平性和速率之间权衡折中时表现更好.
In order to meet the different business needs of multi-users in downlink communication of OFDMA-WLAN system, a resource allocation algorithm based on fairness and QoS service assurance is proposed. Different QoS requirements are converted into different rate requirements to calculate QoS satisfaction level. Is modified to be a fairness-driven optimization function to provide fairness protection; the problem of complex resource allocation is divided into channel assignment and power allocation, and the result of allocation is obtained by bipartite graph matching and water flooding method.Compared with other algorithms, Algorithm sacrifices less data rate in exchange for higher fairness and QoS satisfaction.The simulation results show that the proposed algorithm has the ability of guaranteeing QoS and fairness and shows the trade-off between QoS, fairness and rate better.