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:
Aug. 09, 1994
Filed:
Jan. 27, 1993
Ruixue Fan, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a multi-stage switching system, a time stamp is attached to each cell at an entry point of the system indicating the time of arrival of the cell, and the cell is transferred to a network comprising multiple switching stages each being composed of basic switching modules. The switching modules of all stages are interconnected to form the network. Each switching module comprises a self-routing switch and buffers connected thereto. The time stamp of cells arriving at a given one of the switching modules, where the cells are likely to arrive out of sequence, is constantly monitored and a minimum value of the time stamps is detected. When an empty buffer exists in the given switching module, an idle cell containing the time stamp of the minimum value is generated at the output of the empty buffer.