Fairness and throughput analysis for generalized proportional fair frequency scheduling in OFDMA
Fairness and throughput analysis for generalized proportional fair frequency scheduling in OFDMA
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DOI：
10.1109/vetecs.2005.1543653
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发表时间：
2005-12
期刊：
影响因子：
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通讯作者：
C. Wengerter;Jan Ohlhorst;Alexander Golitschek Edler von Elbwart
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文献类型：
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作者：
C. Wengerter;Jan Ohlhorst;Alexander Golitschek Edler von Elbwart
本文提出了一种广义比例公平（GPF）调度算法，该算法允许在蜂窝下行场景中调整公平性和吞吐量性能之间的权衡。将GPF扩展到OFDMA系统的频率调度，在子带基础上进行动态信道分配，包括自适应调制和编码的链路自适应。这样，多用户分集就可以在时域和频域得到利用，就像CDMA一样。与没有频率调度的系统相比，这增加了系统吞吐量，并在分配的资源和每个用户实现的数据速率方面提高了公平性。通过系统级仿真，分析了采用频率调度和不采用频率调度时各种GPF配置的短期/长期公平性、多用户分集增益和系统吞吐量。
In this paper, a generalized proportional fair (GPF) scheduling algorithm is presented, which allows tweaking the trade-off between fairness and throughput performance for best effort traffic in a cellular downlink scenario. The GPF is extended to frequency scheduling in an OFDMA system by performing dynamic channel allocation on a subband basis including link adaptation by adaptive modulation and coding. In this way, multiuser diversity can be utilized in time domain - as for CDMA - and in frequency domain. Compared to a system without frequency scheduling, this increases the system throughput and yields an improved fairness with respect to the allocated resources and with respect to the achieved data-rate per user. OFDMA system level simulations are carried out in order to analyze short/long-term fairness, multiuser diversity gain and system throughput of various GPF configurations with and without applying frequency scheduling.