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

TL;DR

This paper models long-range dependent VBR video traffic and examines its impact on TCP over ABR in terrestrial and satellite ATM networks, showing ERICA+ effectively manages capacity variance.

Contribution

It introduces a model for LRD VBR video traffic and evaluates its effect on TCP over ABR, demonstrating ERICA+'s robustness in variable capacity scenarios.

Findings

ERICA+ maintains high throughput with VBR traffic

TCP over ABR experiences high capacity variance due to LRD traffic

Simulation confirms ERICA+'s effectiveness in terrestrial and satellite networks

Abstract

Compressed video is well known to be self-similar in nature. We model VBR carrying Long-Range Dependent (LRD), multiplexed MPEG-2 video sources. The actual traffic for the model is generated using fast-fourier transform of generate the fractional gaussian noise (FGN) sequence. Our model of compressed video sources bears similarity to an MPEG-2 Transport Stream carrying video, i.e., it is long-range dependent and generates traffic in a piecewise-CBR fashion. 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. We find that a switch algorithm like ERICA+ can tolerate this variance in ABR capacity while maintaining high throughput and low delay. We present simulation results for terrestrial and satellite configurations.