The Characteristics of WWW Traffic and the Relevance to ATM

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Pär Karlsson, Åke Arvidsson
Title: The Characteristics of WWW Traffic and the Relevance to ATM
Conference name: COST 257 Management Committee Meeting
Year: 1997
Publisher: COST 257
City: Espoo
Organization: Blekinge Institute of Technology
Department: Dept. of Telecommunications and Mathematics (Institutionen för telekommunikation och matematik)
Dept. of Telecommunications and Mathematics S-371 79 Karlskrona
+46 455 780 00
Authors e-mail:,
Language: English
Abstract: This document describes a study of the characteristics of recorded WWWtraffic. Several parameters
of the traffic are investigated, The results are used to investigate a scenario where ATM is used as the
underlying transport mechanism. Problems with the deployment of ATM in the approach taken are
considered and suggestions for improvements are made.
The high variability of the traffic implies that a fixed allocation of bandwidth between the mean
and peak rate is an infeasible way to achieve a reasonable utilization of the system, since this results
in tremendous buffering demands. This calls for a different view on the way to study the system under
consideration. Different properties of the traffic must be taken care of by different methods. Variations
over longer time-scales are dealt with by means of capacity allocation and fluctuations with shorter
duration are buffered.
This realistic way of looking at the system might also put different tasks, such as traffic modelling, in
a new light. For instance, does a model that is to be used for buffer dimensioning have to capture traffic
behavior on time-scales that are longer than reasonably can be buffered anyway?
Subject: Telecommunications\Modelling of Bursty Traffics
Keywords: WWW, HTTP, ATM
Note: This document is also published at COST 257 Homepage This article is written under the Project "Modelling of Bursty Traffics"