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:
Sep. 01, 2009
Filed:
Oct. 18, 2006
Young Ho Kim, Daejeon, KR;
BO Heung Chung, Daejeon, KR;
Jae Deok Lim, Daejeon, KR;
Seung Ho Ryu, Seoul, KR;
Yong Sung Jeon, Daejeon, KR;
Sang Woo Lee, Daejeon, KR;
Ki Young Kim, Daejeon, KR;
Young Ho Kim, Daejeon, KR;
Bo Heung Chung, Daejeon, KR;
Jae Deok Lim, Daejeon, KR;
Seung Ho Ryu, Seoul, KR;
Yong Sung Jeon, Daejeon, KR;
Sang Woo Lee, Daejeon, KR;
Ki Young Kim, Daejeon, KR;
Electronic and Telecommunications Research Institute, Daejeon, KR;
Abstract
Provided is a method of generating and searching for a single ternary content addressable memory (TCAM) entry for range search and exact-match search. First, it is determined whether an entry to be added is a range search entry or an exact-match search entry. When the entry is the range search entry, a bit at a predetermined position in the upper m bits corresponding to a range represented by the entry is set to '1' and the remaining bits including lower n bits is set to a 'don't care' bit x, based on a range table for representing position information of one of the upper m bits which is set to “1” in ranges. When the entry is the exact-match search entry, the upper m bits is set to “don't care” bit x and the lower n bits is set to the entry value. By generating and searching for a single TCAM entry for a range search and an exact-match search, a space for storing the TCAM entry can be optimized and efficiency thereof can be improved.