Acta Metallurgica Sinica(English letters) ›› 2009, Vol. 16 ›› Issue (3): 24-29.doi: 10.1016/S1005-8885(08)60222-8

• Wireless • Previous Articles     Next Articles

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

SUN Qiao-yun, TIAN Hui, DONG Kun, ZHANG Ping   

  1. Key Laboratory of Universal Wireless Communications, Ministry of Education , Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-06-30
  • Contact: SUN Qiao-yun

Abstract:

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.

Key words:

MIMO-OFDMA;cross layer;QoS;AMC