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. 05, 2004
Filed:
Apr. 28, 2000
Takashi Mizuochi, Tokyo, JP;
Yojiro Osaki, Tokyo, JP;
Aritomo Uemura, Tokyo, JP;
Hiroshi Ichibangase, Tokyo, JP;
Kiwami Matsushita, Tokyo, JP;
Tadayoshi Kitayama, Tokyo, JP;
Shu Yamamoto, Tokyo, JP;
Tetsuya Miyazaki, Tokyo, JP;
Takatomi Kabashima, Tokyo, JP;
Naoki Kobayashi, Tokyo, JP;
Other;
Abstract
The present invention has an object to obtain an optical signal quality supervisory device that supervises the quality of an optical signal simply, efficiently and with high accuracy without inviting an increase in cost, an increase in circuit scale and increase in power consumption. The bit rate of the optical supervisory channel is made lower than the bit rate of the optical main channel that is transmitted over an optical communication system, but the reception electric band width of a receiver that receives the optical supervisory channel is made equal to or wider than the reception electric band width of a receiver that receives the optical main channel. Also, the optical supervisory channel is made up of an SOH (section over head) frame to detect an error of the BIP (bit interleaved parity) byte of SOH, thereby supervising the quality of the optical communication system, in particular, the light wave network.