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:
Oct. 30, 2007
Filed:
Jun. 29, 2004
Doron Shoham, Shoham, IL;
Shimon Listman, Tel Mond, IL;
Eliahu Shapiro, Katzir, IL;
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Error protection for lookup operations in a content-addressable memory (CAM) entries is disclosed. Values extended to include error protection or error protection fields are stored in CAM entries and a lookup operation is performed on a similarly extended lookup word to determine whether or not an entry is matched, that is, if all or all but some predetermined number of bits match one of the extended entries. For example, one implementation includes multiple CAM entries and logic configured to perform a lookup operation in parallel on each of the CAM entries based on a lookup word to determine whether or not a hit results, where the hit is determined if an entry matches the lookup word in all or all but k bit positions, where n and k are integers, n>k, and k>0.