Abstract:Based on the high data rate evolution of next generation Wireless Local Area Network (WLAN), a cross-layer rate control algorithm of MIMO system is proposed. Firstly, the limit of physical layer rate control algorithm which maximizes the throughput of physical layer and guarantees the Bit Error Rate (BER) of traffic is analyzed. Secondly, integrated with the Adaptive Modulation and Coding (AMC) technique, a cross-layer rate control algorithm based on prediction with the purpose of maximizing the throughput of Media Access Control (MAC) layer is presented. The simulation and analysis show that sub-optimal result can be obtained with the guaranteed BER, and thereby enhances the throughput of traffic. Simplicity of calculation, accuracy of prediction and efficiency of run-time are the benefits of this algorithm. The algorithm can be used in close-loop rate control,and the scene of traffic scheduling or frame retransmission.