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:
Oct. 18, 2005
Filed:
May. 21, 2002
Soichiro Araki, Tokyo, JP;
Yoshihiko Suemura, Tokyo, JP;
Akio Tajima, Tokyo, JP;
Seigo Takahashi, Tokyo, JP;
Yoshiharu Maeno, Tokyo, JP;
Naoya Henmi, Tokyo, JP;
Soichiro Araki, Tokyo, JP;
Yoshihiko Suemura, Tokyo, JP;
Akio Tajima, Tokyo, JP;
Seigo Takahashi, Tokyo, JP;
Yoshiharu Maeno, Tokyo, JP;
Naoya Henmi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An optical packet exchange apparatus and an optical switch in which search for a connection pattern between an input unit devoid of a packet to be transmitted and an output unit devoid of a packet to be received is reduced to enable fast switch control even in cases wherein the number of channels of the exchange apparatus is increased or network speed is higher. A plurality of input units, a plurality of output units and an optical switch are provided. Each input unit includes an input buffer unit, a parallel/serial conversion unit, an electrical/optical conversion unit, and a dummy packet insertion unit for sending a dummy packet if there is no packet to be transmitted. Each output unit includes an exchange counterpart contention resolution unit for controlling the exchange counterpart, an optical/electrical conversion unit, a serial/parallel conversion unit, and a packet eliminating unit. The exchange counterpart contention resolution unit controls the packet eliminating unit to eliminate a dummy packet.