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. 03, 2009
Filed:
Sep. 05, 2005
Amir Michaeli, Givat Shapira, IL;
Niv Margalit, Ramat-Hasharon, IL;
Ofer Bardan, Kefar Saba, IL;
Meir Schreiber, Maccabim, IL;
Amir Michaeli, Givat Shapira, IL;
Niv Margalit, Ramat-Hasharon, IL;
Ofer Bardan, Kefar Saba, IL;
Meir Schreiber, Maccabim, IL;
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Regular expression matching is performed on a sequence of characters using a pipeline architecture of regular expression matching stages. Multiple regular expression matching stages are connected together in a pipeline manner, with each of these regular expression matching stages corresponding to a different portions of the regular expression. These stages are response to indications from their immediately preceding stages (if they have a preceding stage) of whether or not a progressive match was determined. If all preceding stages matched for corresponding characters of the sequence of characters, then a stage will identify whether or not the current character matches its programmed portion of the regular expression to a next stage or to another device (e.g., the final stage may indicate to a packet processor whether or not the regular expression is matched).