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:
Apr. 05, 2016
Filed:
Jul. 17, 2014
Hitachi Metals, Ltd., Minato-ku, Tokyo, JP;
Tomoyoshi Tatsumi, Tsuchiura, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A port switch of type A has a distribution mode for maintaining a backward compatibility with a port switch of type B. A distribution identifier calculating unit performs a logical operation with the same operational expression to the same bit region as the type B in a header contained in a frame, thereby calculating a k-bit (k>j) distribution identifier partly containing the same j-bit bit region as the type B. A distribution table indicates a correspondence relation between three sub-links and the k-bit distribution identifier, and has contents in which the j-bit distribution identifier in the distribution table of the type B is replaced with the k-bit distribution identifier partly containing the same j-bit value as that of the j-bit distribution identifier.