Computer Engineering and Applications, Volume (5), No (2), Year (2016-5) , Pages (47-56)

Title : ( High Load Control Mechanism for SIP Servers )

Authors: Ahmadreza Montazerolghaem , Seyed Amin Hosseini Seno , Mohammad Hossein Yaghmaee Moghaddam , Rahmat Budiarto ,

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To start voice, image, instant messaging, and generally multimedia communication, session communication must begin between two participants. SIP (session initiation protocol) that is an application layer control induces management and terminates this kind of sessions. As far as the independence of SIP from transport layer protocols is concerned, SIP messages can be transferred on a variety of transport layer protocols including TCP or UDP. Mechanism of Retransmission that is embedded in SIP could compensate for the missing packet loss, in case of need. This mechanism is applied when SIP messages are transmitted on an unreliable transmission layer protocol like UDP. Also, while facing SIP proxy with overload, it could cause excessive filling of proxy queue, postpone increase of other contacts, and add to the amount of the proxy overload. In the present work, while using UDP as transport layer protocol, invite retransmission timer (T1) was appropriately regulated and SIP functionality was improved. Therefore, by proposing an adaptive timer of invite message retransmission, attempts were made to improve the time of session initiation and consequently improve the performance. Performance of the proposed SIP was implemented and evaluated by SIPP software in a real network environment and its accuracy and performance were demonstrated.


, Load Control, TCP, SIP, VoIP, Regulating Timers.
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author = {Montazerolghaem, Ahmadreza and Hosseini Seno, Seyed Amin and Yaghmaee Moghaddam, Mohammad Hossein and Rahmat Budiarto},
title = {High Load Control Mechanism for SIP Servers},
journal = {Computer Engineering and Applications},
year = {2016},
volume = {5},
number = {2},
month = {May},
issn = {2252-4274},
pages = {47--56},
numpages = {9},
keywords = {Load Control; TCP; SIP; VoIP; Regulating Timers.},


%0 Journal Article
%T High Load Control Mechanism for SIP Servers
%A Montazerolghaem, Ahmadreza
%A Hosseini Seno, Seyed Amin
%A Yaghmaee Moghaddam, Mohammad Hossein
%A Rahmat Budiarto
%J Computer Engineering and Applications
%@ 2252-4274
%D 2016