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Oz Net Modeling - Traffic Model

Except for the addition of this comment and changes to the layout and navigation links, the content of this page was last updated on 23 May 1999. The Oz Net Modeling Project is no longer active.

Oz Net Modeling - Traffic Model

This is the traffic model for the Oz Net Modeling Project aimed at quantifying the effects of the government's proposed Net censorship legislation (the Broadcasting Services (Online Services) Amendment Bill).

Introduction

The Net Traffic Model splits users into a number of sectors and models the traffic between each pair of sectors. Traffic is split between metropolitan, national and international.

Structure

In this model we make the following assumptions:

  • All international traffic passes through a backbone provider in addition to an international link.
  • Users in all sectors are distributed in proportion to the population.
  • Content in all sectors is distributed in proportion to the population.
  • National traffic between users and content to users within urban areas of 200,000 population or more is all via peering points.
  • National traffic between users and content to users between metro areas and outside of metro areas is via backbone providers.
  • The population of Australia won't change significantly over the period of interest.
  • National traffic between users and content to users is proportional to the population in the receiving area by the population in the sending area.
  • Larger ISPs will provide their own links between urban areas. This will be modeled separately.

Details

The table below gives the population of each major urban area plus all other areas in Australia.
Area Population
'000		 Rest of Pop.
'000		 Pop. squared
'000,000		 Pop. * rest
'000,000
Sydney 3,276 14,616 10,732 47,882
Melbourne 2,865 15,027 8,208 43,052
Brisbane 1,291 16,601 1,667 21,432
Perth 1,097 16,795 1,203 18,424
Adelaide 978 16,914 956 16,542
Canberra 332 17,560 110 5,830
Gold Coast 311 17,581 97 5,468
Newcastle 270 17,622 73 4,758
Central Coast 227 17,665 52 4,010
Wollongong 219 17,673 48 3,870
Rest 7,026 17,892 0 125,709
Total 17,892 23,146 296,977
Proportion 7% 93%

Table: Australian Population

Sources: ABS 1996 Census of Population and Housing - Urban Centres and Localities - Australia, and 1996 Census of Population and Housing - Summary of Findings (Australia).

Summary

  • All international traffic passes through a backbone provider in addition to an international link.
  • 7% of national traffic passes through ISP to ISP peering points.
  • Of the remaining 93% of national traffic most will be carried by a national backbone provider.
  • Some of the remaining 93% of national traffic will be carried entirely by larger ISPs over their own inter urban networks, the proportion will depend on the size of the ISPs - see ISP/ICH model.
Copyright © 1999 Dr Michael Baker
When I figure out how, the content of the Oz Net Modeling Project web site will be covered by a copyleft.
mbaker@pobox.com

Last updated 23 May 1999
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