OFDMA无线网络中提高QOS的资源分配

摘要

针对OFDMA无线网络下行链路,提出了一种面向不同业务的低复杂度资源分配算法.方案基于单用户双业务最大容量的分析,设计了多用户中以提高可变速率业务的容量为目标,进而提高系统的总容量,又满足固定速率业务和可变速率业务的资源分配算法.仿真结果表明,该算法能够充分利用多用户分集增益,在相同的通信服务质量条件下,算法提高了系统性能,降低了计算复杂度,具有现实意义.%In this paper, a low complexity resource management scheme for the downlink OFDMA systems is proposed. Based on analyzing the greatest capacity of the single user with two services, an algorithm is designed to improve the capacity of the users of volatile transmission speed and all the system,the algorithm applies to the multi-user also. Numerical results and analysis demonstrate that the proposed scheme can exploit multi-user diversity; the new algorithm has markedly improving of the system capacity and great complexity reduction under the same QoS condition. It has bright prospect in applications algorithm.