Cross layer scheduling for real-time traffic in multiuser MIMO-OFDMA systems  

作　　者：SUN Qiao-yun,TIAN Hui,DONG Kun,ZHANG Ping Key Laboratory of Universal Wireless Communications,Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876,China 

出　　处：《The Journal of China Universities of Posts and Telecommunications》2009年第3期24-29,共6页中国邮电高校学报（英文版）

基　　金：supported by the Hi-Tech Research and Development Program of China(2006AA01Z283,2006AA01Z260);the National Natural Science Foundation of China(60496312)

摘　　要：A novel cross layer scheduling algorithm is proposed for real-time （RT） traffic in multiuser downlink multiple-input multiple-output orthogonal frequency division multiple access （MIMO-OFDMA） wireless systems. The algorithm dynamically allocates resources in space, time and frequency domain based on channel state information （CSI）, users＇ quality of service （QoS） requirements and queue state information （QSI）. To provide higher data rate and spectrum efficiency, adaptive modulation and coding （AMC） is employed. The proposed algorithm can improve cell throughput and increase the number of users that can be supported while guaranteeing users＇ QoS requirements and fairness among all users. Simulation results indicate that the proposed algorithm can achieve superior performance.A novel cross layer scheduling algorithm is proposed for real-time （RT） traffic in multiuser downlink multiple-input multiple-output orthogonal frequency division multiple access （MIMO-OFDMA） wireless systems. The algorithm dynamically allocates resources in space, time and frequency domain based on channel state information （CSI）, users＇ quality of service （QoS） requirements and queue state information （QSI）. To provide higher data rate and spectrum efficiency, adaptive modulation and coding （AMC） is employed. The proposed algorithm can improve cell throughput and increase the number of users that can be supported while guaranteeing users＇ QoS requirements and fairness among all users. Simulation results indicate that the proposed algorithm can achieve superior performance.

关 键 词：MIMO-OFDMA cross layer QOS AMC 

分 类 号：TN929.531[电子电信—通信与信息系统]