A Novel Proportional Fair Scheduling Algorithm in Relay Based OFDMA Systems
首发时间:2012-11-14
Abstract:This paper proposes a novel proportional fair scheduling (NPFS) scheme in a relay based Orthogonal Frequency Division Multiple Access (OFDMA) downlink scenario. The NPFS scheme generalizes the basic idea of proportional fair scheduling (PFS) algorithm and considers not only the channel condition, but also the user throughput and packet delay before making the final decision. Compared with the traditional proportional fair (PF) scheme, the proposed algorithm can obtain larger system throughput and lower average packet delay with approximately the same user fairness. Simulation results verify that the NPFS scheme is able to make a better tradeoff between system throughput and user fairness than its counterparts.
keywords: wireless communication scheduling proportional fair resource allocation
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基于中继OFDMA系统改进的比例公平调度算法
摘要:本文针对OFDMA中继系统下行链路场景,提出了一种改进的比例公平调度方案。所提算法对传统多用户场景中的比例公平算法的核心思想进行了扩展,在进行调度决策的过程中,不仅参考用户的信道状态信息,同时也依据不同用户吞吐量之间的关系以及用户的平均分组时延。相比传统的比例公平算法,本文所提算法可以获得更高的系统吞吐量,更低的用户平均分组时延和接近的用户公平性。仿真结果进一步证明了所提算法相比于传统比例公平算法可以获得系统吞吐量和用户公平性之间更好的折中。
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