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. 18, 2003
Filed:
Nov. 23, 1998
Ryuichi Ikematsu, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A hitless switching system in an asynchronous transfer mode (ATM) apparatus, includes a first system switch section and a second system switch section. The first system switch section has a first cell buffer, and sequentially stores a sequence of cells in the first cell buffer to sequentially output the stored cells from the first cell buffer while performing a discard priority control to the sequence of cells. Also, the first system switch section stops the discard priority control when a switching control cell is detected in the sequence of cells. The second system switch section has a second cell buffer, and sequentially stores the input cells in the second cell buffer to sequentially output the stored cells from the second cell buffer while performing the discard priority control to the sequence of cells. When the switching control cell is detected in the input cell, the second system switch section stops the discard priority control and discards the stored cells from the second cell buffer together with the switching control cell.