QoS control versus generous dimensioning

Abstract

As the world of telecommunications embraces IP as the route to truly converged networks there are, for pioneering national telecommunications operators, difficult engineering requirements to address — in particular, how to deliver high-quality session-based services over a connectionless infrastructure. The falling price of commodity bit transport leads some to suggest that simply providing high levels of capacity will be enough to provide effective quality in the ‘new wave’ networks, and that sophisticated approaches, such as explicit bandwidth reservation, are an expensive luxury. We discuss the implications of operating a network under the two very different paradigms of QoS control (bandwidth reservation under connection control) and generous dimensioning, focusing at first on a pure PSTN replacement, before considering the implications for a true, converged multiservice platform. We conclude that these two approaches give rise to different services. In an increasingly competitive world we might choose either approach for different commercial reasons, but we should not be misled into believing that generous dimensioning gives us the same service as QoS control.

This is a preview of subscription content, access via your institution.

References

  1. 1

    Mustill D and Willis P J: ‘Delivering QoS in the next generation network — a standards perspective’, BT Technol J, 23, No2, pp 48–60 (April 2005).

    Article  Google Scholar 

  2. 2

    BT Annual Report and Form 20-F (2004) — http://www.btplc.com/sharesandperformance/

  3. 3

    Reid A B D: ‘Economics and scalability of QoS solutions’, BT Technol J, 23, No2, pp 97–117 (April 2005).

    Google Scholar 

  4. 4

    Hovell P, Briscoe B and Corliano G: ‘Guaranteed QoS synthesis — an example of a scalable core IP quality of service solution’, BT Technol J, 23, No2, pp 160–170 (April 2005).

    Article  Google Scholar 

Download references

Authors

About this article

Cite this article

Johnson, D.M. QoS control versus generous dimensioning. BT Technol J 23, 81–96 (2005). https://doi.org/10.1007/s10550-005-0009-2

Download citation

Keywords

  • Information System
  • Communication Network
  • User Interface
  • Engineering Requirement
  • Multimedia Information