<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 12pt;
font-family:Calibri
}
--></style></head>
<body class='hmmessage'><div dir='ltr'>Dear all,<br> <br>SIP overload may block too many calls unnecessarily. <br>"Requirements for Management of Overload in the Session Initiation Protocol. IETF RFC 5390."<br><a href="http://www.ietf.org/rfc/rfc5390.txt">http://www.ietf.org/rfc/rfc5390.txt</a><BR> <BR> <BR>Build-in overload mechanism cannot prevent overload effectively. Therefore, IETF SIP Overload Control (soc) Working Group works on IETF RFC "SIP Overload Control" currently.<br><a href="http://tools.ietf.org/html/draft-ietf-soc-overload-control-12">http://tools.ietf.org/html/draft-ietf-soc-overload-control-12</a><BR> <BR>IETF SIP Overload Control discussion archives<br><a href="http://www.ietf.org/mail-archive/web/sip-overload/current/threads.html#00874">http://www.ietf.org/mail-archive/web/sip-overload/current/threads.html#00874</a><br><BR> <BR> <br>We have published a survey on SIP overload control algorithms (including IETF RFC "SIP Overload Control").<br> <br><a href="http://www.researchgate.net/publication/231609451_A_Comparative_Study_of_SIP_Overload_Control_Algorithms">http://www.researchgate.net/publication/231609451_A_Comparative_Study_of_SIP_Overload_Control_Algorithms</a><br><BR><a href="http://arxiv.org/abs/1210.1505">http://arxiv.org/abs/1210.1505</a><br><BR><a href="http://www.igi-global.com/chapter/comparative-study-sip-overload-control/67496">http://www.igi-global.com/chapter/comparative-study-sip-overload-control/67496</a><br> <br> <br> <br> <br>We have also used control theorectic approaches to model the interactions between an overloaded SIP server and its upstream servers as a feedback control system in two different scenarios - redundant retransmission ratio control and round trip delay control (IEEE Globecom 2010 and ICC 2011).<BR> <BR> <BR> <br>"Mitigating SIP Overload Using a Control-Theoretic Approach" IEEE Globecom 2010<br><a href="http://www.researchgate.net/publication/221284946_Mitigating_SIP_Overload_Using_a_Control-Theoretic_Approach">http://www.researchgate.net/publication/221284946_Mitigating_SIP_Overload_Using_a_Control-Theoretic_Approach</a><br><a href="http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5683124&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5683124">http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5683124&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5683124</a><BR> <br>Implementation of implicit SIP overload control in the real system<br>"An Efficient Earthquake Early Warning Message Delivery Algorithm Using an in Time Control-Theoretic Approach"<br><a href="http://link.springer.com/chapter/10.1007%2F978-3-642-23641-9_15">http://link.springer.com/chapter/10.1007%2F978-3-642-23641-9_15</a>#<br> <br> <br> <br>"Design Of A PI Rate Controller for Mitigating SIP Overload" IEEE ICC 2011<br><a href="http://www.researchgate.net/publication/224249824_Design_of_a_PI_Rate_Controller_for_Mitigating_SIP_Overload">http://www.researchgate.net/publication/224249824_Design_of_a_PI_Rate_Controller_for_Mitigating_SIP_Overload</a><br><a href="http://features.rr.com/article/01vBgtc8TR17z?q=Skype">http://features.rr.com/article/01vBgtc8TR17z?q=Skype</a><br><a href="http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5963029&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5963029">http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5963029&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5963029</a> <br> <br> <BR><br>Best regards,<br> <br> <br> <br>Winston Hong<br>Software Engineer<br>InBay Technologies Inc.<br>Ottawa, Canada K2K 1Y3<br><a href="http://www.inbaytech.com/">http://www.inbaytech.com/</a><BR> </div></body>
</html>