The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 13, 2007
Filed:
Aug. 21, 2002
Applicants:
Scott D'souza, Ottawa, CA;
Paul Kierstead, Ottawa, CA;
Inventors:
Scott D'Souza, Ottawa, CA;
Paul Kierstead, Ottawa, CA;
Assignee:
Alcatel Canada Inc., Kanata, CA;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J 3/14 (2006.01); H04L 9/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
Methods and apparatus for mitigating denial of service attacks in a communications network are described. Frequency domain techniques such as Fourier Transform are used to detect packet flooding in which a frequency spectrum reveals a periodic pattern to the attack packets. A pulse generator is used to create pulses having the frequency and phase of the periodic pattern. New packets arriving simultaneously with the created pulses are dropped from the system and packets which are not synchronized with the pulse generator are passed through the system normally.