Bandwidth Estimation Using Network Calculus in Practice

• Autorzy: Wasielewska Katarzyna , Borys Andrzej

Identyfikatory

DOI

10.24425/ijet.2019.126293

• Języki publikacji: EN

Abstrakty

EN

An available bandwidth at a link is an unused capacity. Its measuring and/or estimation is not simple in practice. On the other hand, we know that its continuous knowledge is crucial for the operation of almost all networks. Therefore, there is a continuous effort in improving the existing and developing new methods of available bandwidth measurement and/or estimation. This paper deals with these problems. Network calculus terminology allows to express an available bandwidth in terms of a service curve. The service curve is a function representing a service available for a traffic flow which can be measured/estimated in a node as well as at an end-to-end connection of a network. An Internet traffic is highly unpredictable what hinders to a large extent an execution of the tasks mentioned above. This paper draws attention to pitfalls and difficulties with application of the existing network calculus methods of an available bandwidth estimation in a real Internet Service Provider (ISP) network. The results achieved in measurements have been also confirmed in simulations performed as well as by mathematical considerations presented here. They give a new perspective on the outcomes obtained by other authors and on their interpretations.

Słowa kluczowe

EN

bandwidth estimation; network calculus; quality of service; internet traffic

• Wydawca: Polish Academy of Sciences, Committee of Electronics and Telecommunication
• Czasopismo: International Journal of Electronics and Telecommunications
• Rocznik: 2019
• Tom: Vol. 65, No. 1
• Strony: 133--138
• Opis fizyczny: Bibliogr. 15 poz., rys., wykr.

Twórcy

autor

Wasielewska Katarzyna

• Institute of Applied Informatics, The State University of Applied Sciences in Elblag, Poland

autor

Borys Andrzej

• Department of Marine Telecommunications, Faculty of Electrical Engineering, Gdynia Maritime University, Gdynia, Poland

Bibliografia

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• [13] J.-Y. Le Boudec, P. Thiran, Network Calculus: A Theory of Deterministic Queuing Systems for the Internet, 2050th ed.: Lecture Notes in Computer Science, 2012.
• [14] Wasielewska K., Network Calculus in the practice - available bandwidth estimation, 3rd Workshop on Network Calculus (WoNeCa-3), Münster, Germany, 2016.
• [15] A. Borys, M. Aleksiewicz, D. Rybarczyk, K. Wasielewska, Some principles of network calculus revisited, International Journal of Electronics and Telecommunications, vol. 57, no. 3, pp. 279-284, 2011.

Uwagi

1. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).

2. The work of the second author of this paper was supported in part by the grant AMG DS/450/2018.