Opportunistic Scheduling for Heterogeneous Services in Downlink OFDMA System
Opportunistic Scheduling for Heterogeneous Services in Downlink OFDMA System
复制标题
OFDMA下行系统异构业务机会调度
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Haige Xiang
中科院分区：
文献类型：
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作者：
Jun Shen;Na Yi;An Liu;Haige Xiang
我们考虑下行OFDMA系统中的机会调度，以支持不同的服务。在给定用户队列状态信息(QSI)和信道状态信息(CSI)的情况下，提出的基于和等待时间的调度(SWBS)算法能够同时保证实时(RT)和非实时(NRT)业务的服务质量要求。基于分组等待时间总和来调度异类服务以满足服务质量要求，并利用多用户分集来实现有效的资源利用。仿真结果表明，该算法提高了实时业务的最大丢包率和分组时延，提高了非实时业务的吞吐量。
We consider opportunistic scheduling in a downlink OFDMA system to support heterogeneous services. Given the user's queue state information (QSI) and channel state information (CSI), the proposed sum waiting time based scheduling (SWBS) algorithm can guarantee QoS requirements for both real-time (RT) and non-real-time (NRT) service. The benefit is attained from scheduling heterogeneous services based on sum packet waiting time to fulfill the QoS requirements and exploiting multiuser diversity to achieve effective resource utilization. Simulation results illustrate that the max packet loss ratio and packet delay for real-time service and the throughput for non-real-time service are improved by the proposed algorithm.