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. 11, 2011
Filed:
Mar. 21, 2008
Sun-hyok Chang, Daejeon, KR;
Hwan-seok Chung, Daejeon, KR;
Sang-soo Lee, Daejeon, KR;
Kwang-joon Kim, Daejeon, KR;
Sun-hyok Chang, Daejeon, KR;
Hwan-seok Chung, Daejeon, KR;
Sang-soo Lee, Daejeon, KR;
Kwang-joon Kim, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon-si, KR;
Abstract
An apparatus and method for protection switching of an optical channel at each node in an optical network based on wavelength division multiplexing optical transmission technology are provided. The method can be applied to any node having at least two optical fiber inputs and outputs. The apparatus includes: a splitter receiving an electrical signal and splitting the received electrical signal into a plurality of electrical signals which are substantially identical to the received electrical signal; an output switching unit selecting output paths of the electrical signals split by the splitter according to an optical channel path control command of the optical network; and a plurality of optical transponders being assigned to the respective output paths of the electrical signals, converting the electrical signal input by the selection of the output switching unit to an optical signal, and transmitting the converted optical signal to another node of the optical network.