An adaptive scheme for better utilization with QoS constraints for VBR video traffic in ATM networks

The efficient transportation of real-time variable bit rate (VBR) video traffic in high-speed networks is critical for current multimedia applications. The real-time VBR video traffic has stringent delay and cell-loss requirements. The high burstiness of the correlated VBR video traffic makes the adaptive resource management, highly desirable. This paper presents a dynamic bandwidth allocation scheme for VBR video traffic based on buffer monitoring and a simple least mean square (LMS) traffic prediction system. The goal is to reduce the frequency of the bandwidth changes and at the same time reduce the cell-loss rate (CLR) with better bandwidth utilization. Simulation results indicate that utilization of up to 0.8 can be achieved by the proposed scheme even under high source alignment for bursty VBR video traffic, with less frequent reallocations.