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:
Dec. 12, 2006
Filed:
Jun. 03, 2003
Claude Basso, Raleigh, NC (US);
Jean L. Calvignac, Cary, NC (US);
Gordon T. Davis, Chapel Hill, NC (US);
Marco Heddes, Shelton, CT (US);
Piyush C. Patel, Cary, NC (US);
Steven R. Perrin, Raleigh, NC (US);
Grayson W. Randall, Cary, NC (US);
Sonia K. Rovner, Chapel Hill, NC (US);
Claude Basso, Raleigh, NC (US);
Jean L. Calvignac, Cary, NC (US);
Gordon T. Davis, Chapel Hill, NC (US);
Marco Heddes, Shelton, CT (US);
Piyush C. Patel, Cary, NC (US);
Steven R. Perrin, Raleigh, NC (US);
Grayson W. Randall, Cary, NC (US);
Sonia K. Rovner, Chapel Hill, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A technique is provided to either insert or delete a leaf in a Patricia tree having a direct table and a plurality of PSCB's which decode portions of the pattern of a leaf in the tree without shutting down the functioning of the tree. A leaf having a pattern is identified as either a leaf to be inserted or deleted. Using the pattern, the tree is walked once to identify the location of the leaf to be deleted or the location where the leaf is to be inserted. If it is a delete operation, the leaf to be deleted is identified and deleted, and any relevant PSCB modified, if necessary. If it is an insert operation, the tree is walked a second time to insert the leaf and reform or create any PSCB in the chain that needs to be reformed or created. The technique also is applicable to inserting or deleting a prefix of a prefix.