Performance of TCP over ABR with Long-Range Dependent VBR Background Traffic over Terrestrial and Satellite ATM networks

摘要

Compressed video is well known to be self-similar in nature. We model VBRcarrying Long-Range Dependent (LRD), multiplexed MPEG-2 video sources. Theactual traffic for the model is generated using fast-fourier transform ofgenerate the fractional gaussian noise (FGN) sequence. Our model of compressedvideo sources bears similarity to an MPEG-2 Transport Stream carrying video,i.e., it is long-range dependent and generates traffic in a piecewise-CBRfashion. We study the effect of such VBR traffic on ABR carrying TCP traffic.The effect of such VBR traffic is that the ABR capacity is highly variant. Wefind that a switch algorithm like ERICA+ can tolerate this variance in ABRcapacity while maintaining high throughput and low delay. We present simulationresults for terrestrial and satellite configurations.