Dynamic WFQ scheduling for real-time traffic in wireless ATM links

This paper proposes a dynamic scheduling scheme to provide Quality of Service (QoS) guarantees in wireless Multiple Access Control (MAC). In order to achieve high bandwidth utilization and QoS guarantee ratio, token models of sources are constructed in Base Station (BS) scheduler. A token model WFQ algorithm is developed to combine loss and delay requirements for uplink scheduling of realtime traffic. Dynamic priorities are implemented in real-time traffic token model. In addition, emergency token buffer is used to accommodate the bursty characteristics of rt-VBR. Backlogged token buffer compensates the backlogged flow suffering from channel error. Simulations ate done to demonstrate that our DWFQ scheme can improve both QoS performance and allocation efficiency greatly.