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. 07, 2004
Filed:
Mar. 23, 2000
Ryouichi Bandai, Yokohama, JP;
Kenji Sakaue, Yokohama, JP;
Yasuo Unekawa, Yokohama, JP;
Yuichi Miyazawa, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
It is an object of the present invention to provide a data switching method capable of impartially selecting a plurality of input ports by a simple circuit configuration. The data switching method according to the present invention includes an up-counter, a down-counter, a counter selecting circuit for selecting either of a counted value by the up-counter or a counted value by the down-counter, a port selecting circuit for selecting one of a plurality of input ports based on an output from the counter selecting circuit, and a buffer for accumulating a packet supplied from the input port selected by the port selecting circuit. The port selecting circuit alternately selects the up-counter and the down-counter to switch the ascending order and the descending order of the import priority of the input ports at every time the packet is imported, thereby impartially selecting each of the input ports.