多用户MIMO-OFDMA系统混合业务的跨层分组调度算法
doi: 10.3724/SP.J.1146.2007.01226
A Cross-Layer Packet Scheduling Algorithm for Mixed Services in Multi-user MIMO-OFDMA Systems
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摘要: 该文提出了一种针对多输入多输出-正交频分多址系统混合业务的跨层分组调度算法。该算法基于物理层的信道状况和媒体接入控制子层用户的排队时延,分别为实时业务用户和非实时业务用户的排队时延构建相应的效用函数,以保障不同业务的服务需求。仿真结果表明:该算法不但能保证实时业务的时延需要,而且能够获得很好的吞吐量,并满足公平性要求。Abstract: A cross-layer packet scheduling algorithm is proposed for multi-user MIMO-OFDMA systems with the mixed services, such as Real-Time (RT) and Non-Real-Time (NRT) services. The proposed scheduling algorithm is based on the channel state information of physical layer and user queuing delay of Medium Access Control (MAC) sub-layer, and constructs the corresponding utility functions for different types of services. Simulation results show that this algorithm can not only guarantee the delay requirements of RT service but also obtain good system throughput and satisfy the fairness criterion.
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