Multiplex communications – Data flow congestion prevention or control – Flow control of data transmission through a network
Reexamination Certificate
2011-03-29
2011-03-29
Yao, Kwang B (Department: 2473)
Multiplex communications
Data flow congestion prevention or control
Flow control of data transmission through a network
Reexamination Certificate
active
07916643
ABSTRACT:
A method, system and computer program product for limiting extreme loads and reducing fluctuations in load at session servers. An admission rate controller of a SIP router calculates the “deflator ratio” equal to the average number of in-dialog messages received over a first fixed interval of time divided by the average number of out-of-dialog messages received over a second fixed interval of time. Further, the admission rate controller calculates the “dampening ratio” equal to the maximum number of messages allowed over a period of time divided by the number of messages admitted over a previous time interval. When an overload condition has been detected, the admission rate controller calculates the maximum number of out-of-dialog messages to be sent to its associated SIP server based on the deflator and dampening ratios. In this manner, a smoother transition from the overload condition to the non-overload condition may occur.
REFERENCES:
patent: 6038218 (2000-03-01), Otsuka et al.
patent: 6259776 (2001-07-01), Hunt
patent: 6707792 (2004-03-01), Volftsun et al.
patent: 6813264 (2004-11-01), Vassilovski
patent: 6870848 (2005-03-01), Prokop
patent: 7187651 (2007-03-01), Volftsun et al.
patent: 7269655 (2007-09-01), Kim
patent: 7441429 (2008-10-01), Nucci et al.
patent: 2006/0067231 (2006-03-01), Ikoma et al.
patent: 2006/0245359 (2006-11-01), Hosein
patent: 2007/0070989 (2007-03-01), Savoor et al.
patent: 2008/0002576 (2008-01-01), Bugenhagen et al.
patent: 2008/0049615 (2008-02-01), Bugenhagen
patent: 2008/0117816 (2008-05-01), Stone et al.
patent: 2008/0192628 (2008-08-01), Williams
patent: 2008/0198748 (2008-08-01), Gilfix et al.
patent: 2009/0092111 (2009-04-01), Horn et al.
Malas, SIP Performance Metrics, Network Working Group Internet Draft, Jun. 1, 2006.
Office Action for U.S. Appl. No. 11/937,748 dated Nov. 10, 2009.
Office Action from U.S. Appl. No. 11/937,748 dated Mar. 16, 2010.
DeVal Gary John
Hrischuk Curtis E.
Johnson Mark
Lanzen Craig Andrew
Lawwill, Jr. James Winston
International Business Machines - Corporation
Liu Jung
Voigt, Jr. Robert A.
Winstead P.C.
Yao Kwang B
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