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:
Jul. 20, 2010
Filed:
Oct. 07, 2004
Michihiko Goto, Yokohama, JP;
Masamichi Kasa, Yokohama, JP;
Masahiko Iwakiri, Yokohama, JP;
Kazuhiro Uchida, Yokohama, JP;
Manabu Tomiyasu, Yokohama, JP;
Michihiko Goto, Yokohama, JP;
Masamichi Kasa, Yokohama, JP;
Masahiko Iwakiri, Yokohama, JP;
Kazuhiro Uchida, Yokohama, JP;
Manabu Tomiyasu, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A communication device capable of restraining the packet transmission efficiency from lowering. An address storing unit extracts, from uplink packets, the addresses of terminals connected to sub-units and registers the addresses in an address management table. An address extracting unit extracts the address of a destination terminal included in a downlink packet output from a layer 2 switch, and an address determining unit determines whether or not the address of the destination terminal is registered in the address management table. In accordance with the result of the determination, a packet output unit outputs the downlink packet to a corresponding coupler.