Rate-based traffic scheduling algorithm based on load measurement in ATM network

ATM switches should be able to control various kinds of traffic that require different levels of service quality. Generally, ATM switches prepare per-class buffers in line interface circuits or in the switch fabric, and schedule them to satisfy the service requirements. This paper proposes a traffic control algorithm for ATM switches that combines a rate-based cell-scheduler and switch load measurement. Our method generates test cells for each traffic connection, and measures the test cell´s entering interval and exiting interval to estimate the switch load. By estimation the switch load, we determine the scheduling rate of each connection. We also propose a rate-based cell-scheduling algorithm. Computer simulations have evaluated the proposed algorithms. Our method can be used to accommodate ABR, VBR, UBR, and future GFR services