A Cross-Layer Packet Scheduling Algorithm for Mixed Services in Multi-user MIMO-OFDMA Systems

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.