Characterization of Internet traffic and its impact on network performance

11/21/00


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Table of Contents

Characterization of Internet traffic and its impact on network performance

Road map

Introduction: traffic patterns

Introduction: simulations

Requirements for data transmission

Quality of Service parameters

Traffic patterns: “Star Wars” trace

Definitions: packet loss and loss episodes

Contribution of loss episodes

Collection of packet loss data

ns-2 network simulator

Simple simulation scenario

Complex simulation scenario

Visualization: textured dot strip plots

Contribution of packet loss

Packet loss rates: mixed UDP and TCP sources

Gilbert model

Comparison of simulation data with the Gilbert model

Heavy-tailed distribution of packet loss

Wavelet analysis

Filter-bank pyramidal algorithm

LRD and Hurst parameter

Wavelet-based Hurst parameter estimator

Abry-Veitch estimator

Self-similar traffic patterns

Influence of time-scales

Influence of time-scales

PPT Slide

PPT Slide

PPT Slide

PPT Slide

PPT Slide

Characteristics of the “Star Wars” traffic trace

Wavelet analysis of packet loss

PPT Slide

Analysis of packet loss on multiple time-scales

Packet loss and time-scales

Hurst parameter estimation

Concluding remarks (1)

Concluding remarks (2)

Concluding remarks (3)

Current work

Collaborators

References: on traffic

References: on packet loss

Author: Ljiljana Trajkovic