Statistical Analysis of Message Delay in SIP Proxy Server

• Autorzy: Abaev P. , Razumchik R. , Uglov I.
• Języki publikacji: EN

Abstrakty

EN

Single hop delay of SIP message going through SIP proxy server operating in carriers backbone network is being analyzed. Results indicate that message sojourn times inside SIP server in most cases do not exceed order of tens of milliseconds (99% of all SIP-I messages experience less than 21 ms of sojourn delay) but there were observed very large delays which can hardly be attributed to message specic processing procedures. It is observed that delays are very variable. Delay components distribution that is to identied are not exponentially distributed or nearly constant even per message type or size. The authors show that measured waiting time and minimum transit time through SIP server can be approximated by acyclic phase-type distributions but accuracy of approximation at very high values of quantiles depends on the number outliers in the data. This nding suggests that modeling of SIP server with queueing system of GjPHjc type may server as an adequate solution.

Słowa kluczowe

EN

single hop delay; SIP server; statistical analysis; waiting time

• Wydawca: Instytut Łączności - Państwowy Instytut Badawczy
• Czasopismo: Journal of Telecommunications and Information Technology
• Rocznik: 2014
• Tom: nr 4
• Strony: 79--87
• Opis fizyczny: Bibliogr. 25 poz., rys., tab.

Twórcy

autor

Abaev P.

• Department of Applied Informatics and Probability Theory, Peoples' Friendship University of Russia, Moscow, Russia

autor

Razumchik R.

• Institute of Informatics Problems of RAS, Moscow, Russia

autor

Uglov I.

• Moscow Technical University of Radio Engineering, Electronics and Automation, Moscow, Russia

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