A Mathematical Model of the Skype VoIP Congestion Control Algorithm

Author

Cicco, Luca De ; Mascolo, Saverio

Author_Institution

Dipt. di Elettrotec. ed Elettron., Politec. di Bari, Bari, Italy

Volume

55

Issue

3

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

790

Lastpage

795

Abstract

Voice over Internet Protocol (VoIP) is an Internet application of ever increasing importance. The purpose of this note is to derive a mathematical model of the Skype VoIP congestion control. The proposed model is in the form of a non linear hybrid automation, and has been validated through extensive experiments. The dynamics of the Skype sending rate, the stability of its equilibrium points and the efficiency in bandwidth utilization while avoiding network instability are analyzed. Results show that, under network congestion, the Skype sending rate is driven by the packet loss ratio and matches the available bandwidth with a steady state finite error.

Keywords

Internet telephony; telecommunication congestion control; Skype sending rate; Voice over Internet Protocol; bandwidth utilization efficiency; mathematical model; network congestion; network instability; nonlinear hybrid automation; packet loss ratio; skype VoIP congestion control algorithm; steady state finite error; Algorithm design and analysis; Automata; Automatic control; Bandwidth; Communication system traffic control; Internet telephony; Mathematical model; Protocols; Standardization; TCPIP; Computer networks; hybrid automaton; voice over internet protocol (VoIP) congestion control;

fLanguage

English

Journal_Title

Automatic Control, IEEE Transactions on

Publisher

ieee

ISSN

0018-9286

Type

jour

DOI

10.1109/TAC.2010.2040502

Filename

5406005