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为了提高无线网络吞吐量并兼顾用户之间的公平性,该文针对正交频分多址接入(OFDMA)系统的上行链路提出了一种比例公平的自适应资源分配算法。该算法考虑了上行系统中用户功率的离散分布特性,以最大化用户速率的对数和为优化目标。首先通过理论分析给出了上行比例公平资源分配的最优解形式,然后提出了一种兼顾效率和公平的上行OFDMA系统子载波和功率联合分配算法。仿真结果表明:相比传统的上行资源分配算法,该算法能够取得吞吐量和公平性之间的良好折中。
In order to improve the throughput of wireless networks and to balance the users, this paper proposes a proportional and fair adaptive resource allocation algorithm for the uplink of Orthogonal Frequency Division Multiple Access (OFDMA) systems. The algorithm considers the discrete power distribution of users in the uplink system to maximize the logarithm of the user rate and to optimize the target. Firstly, the optimal solution of uplink proportional fair resource allocation is given through theoretical analysis. Then, an efficient and fair uplink-OFDMA system subcarrier and power joint allocation algorithm is proposed. The simulation results show that the proposed algorithm can achieve a good compromise between throughput and fairness compared with the traditional uplink resource allocation algorithm.