Hello Folks.
SIP faces with overload issue recently due to its popularity. Build-in overload mechanism
cannot prevent overload effectively. Therefore, IETF SIP Overload Control (soc) Working
Group works on IETF RFC "SIP Overload Control" currently.
http://tools.ietf.org/html/draft-ietf-soc-overload-control-13
Control theorectic approaches have been applied to model the interactions between an
overloaded SIP server and its upstream servers as a feedback control system in two
different scenarios - round trip delay control (IEEE ICC 2011) and redundant
retransmission ratio control (IEEE Globecom 2010).
Journal paper (SIP Overload Control) published by Springer Telecommunication Systems
online today not only conducts more theoretical analysis of Round trip delay control
(RTDC) and Redundant retransmission ratio control (RRRC), but also discusses how to apply
RTDC algorithm to mitigate SIP overload for both SIP over UDP and SIP over TCP (with
TLS).
Y. Hong, C. Huang, and J. Yan, "Applying control theoretic approach to mitigate SIP
overload", Telecommunication Systems, DOI: 10.1007/s11235-013-9744-8 Online First,
July 2013.
http://link.springer.com/article/10.1007/s11235-013-9744-8
Round trip delay control: "Design Of A PI Rate Controller For Mitigating SIP
Overload," Proceedings of IEEE ICC, Kyoto, Japan, June 2011.
https://www.researchgate.net/publication/224249824_Design_of_a_PI_Rate_Cont…
http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5963029
This implicit SIP overload control algorithm has been recommended as Industry Standard
Protocol by TechRepublic (CBS Interactive)
http://www.techrepublic.com/whitepapers/design-of-a-pi-rate-controller-for-…
This implicit SIP overload control algorithm has also been recommended as a Skype story by
Road Runner (Time Warner Cable Inc.).
http://features.rr.com/article/01vBgtc8TR17z?q=Skype
Redundant retransmission ratio control: "Mitigating SIP Overload Using a
Control-Theoretic Approach," Proceedings of IEEE Globecom, Miami, FL, U.S.A, December
2010.
https://www.researchgate.net/publication/221284946_Miigating_SIP_Overload_U…
http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5683124
This implicit SIP overload control algorithm has been quickly adopted by The Central
Weather Bureau of Taiwan for their early earthquake warning system.
"An Efficient Earthquake Early Warning Message Delivery Algorithm Using an in Time
Control-Theoretic Approach", 2011.
http://link.springer.com/chapter/10.1007%2F978-3-642-23641-9_15#
http://www.ipv6.org.tw/docu/elearning8_2011/1010004798p_3-7.pdf
Short review and comments on this implicit SIP overload control algorithm by former IEEE
TAC Associate Editor S. Mascolo: "Local SIP Overload Control", Proceedings of
WWIC, June 2013.
http://link.springer.com/chapter/10.1007%2F978-3-642-38401-1_16#
A survey on SIP overload control algorithms (including IETF RFC "SIP Overload
Control") can be downloaded from the following link free of charge.
Y. Hong, C. Huang, and J. Yan, “A Comparative Study of SIP Overload Control
Algorithms,"Network and Traffic Engineering in Emerging Distributed Computing
Applications, Edited by J. Abawajy, M. Pathan, M. Rahman, A.K. Pathan, and M.M. Deris, IGI
Global, 2012, pp. 1-20.
http://www.researchgate.net/publication/231609451_A_Comparative_Study_of_SI…
http://arxiv.org/abs/1210.1505
http://www.igi-global.com/chapter/comparative-study-sip-overload-control/67…
IETF-RFC "SIP Overload Control" discussion archive
http://www.ietf.org/mail-archive/web/sip-overload/current/msg00919.html
In addition, implicit SIP overload control solution using control theorectic approaches
can be regarded as an engineering applications of control theory, as shown by the most
popular answers to the following 2 recent ResearchGate(RG) questions. ResearchGate is the
largest social network for research scientists and engineers in the world.
Yang Hong's answers for the two RG questions have been recommended by ResearchGate as
the most popular answers as shown in the following two links.
RG Question #1: "What are trends in control theory and its applications in physical
systems (from a research point of view)?"
https://www.researchgate.net/post/What_are_trends_in_control_theory_and_its…
RG Question #2: "What are the new trends in control engineering?"
https://www.researchgate.net/post/What_are_the_new_trends_in_control_engine…
Best regards,
Winston Hong
Software Engineer
InBay Technologies Inc.
Ottawa, Ontario
Canada K2K 1Y3
http://www.inbaytech.com/