Modeling a Jitter in Telecommunication Data Networks for Studying Adequacy of Traffic Patterns

Aleksandr Vladimirovich Blagov

doi:10.5539/mas.v9n4p254

Abstract

This article focuses on researching quality of service in telecommunication networks, using simulation models. Due to the presence of the self-similarity effect in network traffic, the author used the approach with self-similar traffic patterns. The article proposes the method associated with building a one-dimensional distribution of delay variation, a jitter. Design and analysis of delay variation are tested on modifications of telecommunications traffic models «Input M/G/¥» and «On-Off Sources», which make it possible to simulate traffic with pre-defined self-similar properties and at the same time with pre-defined statistical characteristics of small levels. Software suite AnyLogic is used as simulation medium that supports approaches with both discrete and continuous time of simulation. The experiments established the benefits of improved versions of «InputM/G/¥» and «On-Off Sources» models over the base models in terms of the most important characteristic of Quality of Service in the jitter network. A conclusion was made that simulation modeling of the studied model makes it possible to analyze quality of service in a telecommunications network by such a parameter as delay variation.

Highlights

The problem of predicting the behavior of traffic in telecommunication networks is important due to the tremendous development of information networks.With the advent of broadband networks, which are characterized by a mixture of different types of traffic, conventional methods for describing traffic become questioned
It turned out that in the conditions of self-similar traffic, methods of calculating parameters of modern computer networks based on Poisson models and Erlang's formulas, which are successfully used for designing telephone networks, provide unduly optimistic solutions and lead to underestimation of the real needs of network resources (Simpson, 2004)
Defines the number of packets lost in the network during transmission. Such QoS characteristic as jitter of a flow through a network node is determined by queue distribution at the particular node, where this stream competes for transmission to the other traffic in the same direction

Summary

Introduction

The problem of predicting the behavior of traffic in telecommunication networks is important due to the tremendous development of information networks. With the advent of broadband networks, which are characterized by a mixture of different types of traffic (video, ftp, http ...), conventional methods for describing traffic become questioned. This type of traffic has strongly pulsating nature, which cannot be described by traditional models, such as the Poisson model. This phenomenon has a strong influence on networks design. New models that are characterized by this to the «explosion» effect, need analysis, design, planning and broadband networks overload management New models that are characterized by this to the «explosion» effect, need analysis, design, planning and broadband networks overload management (Ramakrishnan, 1997, p. 29)

Study of Traffic Models

Studying Quality of Service

Jitter in Data Transmission Networks

Modeling Network Traffic

Environment for Modeling

Building Jitter Distribution