Title :
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
fDate :
3/1/2010 12:00:00 AM
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;
Journal_Title :
Automatic Control, IEEE Transactions on
DOI :
10.1109/TAC.2010.2040502
