HUAWEI MARINE NETWORKS CO., LTD. Patent applications |
Patent application number | Title | Published |
20140255020 | Method, Apparatus, and System for Disaster Recovery of Optical Communication System - A method, an optical add-drop multiplexer branching unit, and a system for disaster recovery of an optical communication system are provided. The method for disaster recovery of an optical communication system using an optical add-drop multiplexer unit (OADM) includes: detecting a transmission link fault in an optical communication system; and when a transmission link fault is detected, switching the state of a link where the transmission link fault occurs from pass-through to loopback, so that an optical signal input from a non-faulty end of the link is looped back to the end for outputting. In this way, when a transmission link fault occurs in an optical communication system, the power level of a link where the transmission link fault occurs can be maintained by using the solutions in the embodiments of the present invention, thereby keeping transmission performance stable. | 09-11-2014 |
20140086573 | METHOD, TRANSPORT APPARATUS, AND SYSTEM FOR DETECTING SUBMARINE OPTICAL CABLE LINE - A method for detecting a submarine optical cable line includes: splitting a detection signal input to a first optical functional unit in an optical functional module of an optical cable line into a first detection signal and a second detection signal; directly coupling and looping back the first detection signal to an output end of a second optical functional unit in a direction opposite to the first optical functional unit to constitute a first loopback path, and outputting a first detection loopback signal; looping back the second detection signal passing through the first optical functional unit to the output end of the second optical functional unit to constitute a second loopback path, and outputting a second detection loopback signal; and detecting a status of the submarine optical cable line according to power of the first detection loopback signal and power of the second detection loopback signal. | 03-27-2014 |
20140078506 | OPTICAL TIME-DOMAIN REFLECTOMETRY SIGNAL DETECTION METHOD AND APPARATUS - The present invention provides an optical time-domain reflectometry signal detection method, including the following steps: modulating, under the control of a correlation code pattern sequence respectively, n detection optical signals transmitted by detection light sources of different wavelengths into n pulse optical signals, where n is a natural number greater than or equal to 2; combining the n pulse optical signals and outputting a detection optical signal to an optical fiber under test; receiving a backscattered optical signal from the optical fiber under test and dividing the backscattered optical signal into n optical signals according to wavelengths; and performing correlation processing on the n optical signals according to the correlation code pattern sequence and outputting a correlation optical time-domain reflectometry signal. The present invention further provides an optical time-domain reflectometry signal detection apparatus. | 03-20-2014 |
20140010531 | SCHEDULING METHOD, APPARATUS, AND SYSTEM FOR AVOIDING DUAL-END MONITORING CONFLICT FOR SUBMARINE CABLE OPTICAL LINE - A scheduling method, apparatus, and system for avoiding a dual-end monitoring conflict for a submarine cable optical line are provided, where the method includes: sending a wavelength occupation request message to a peer-end equipment via a selected submarine cable optical line to be monitored, and receiving a wavelength occupation response message returned by the peer-end equipment; parsing the wavelength occupation response message to determine whether a requested wavelength is occupied by the peer-end equipment; and if the requested wavelength is occupied by the peer-end equipment and the wavelength can be switched, monitoring the selected submarine cable optical line to be monitored by using another wavelength after switching; and if the requested wavelength is not occupied by the peer-end equipment, monitoring the selected submarine cable optical line to be monitored by using the requested wavelength. | 01-09-2014 |
20130223837 | OPTICAL ADD-DROP MULTIPLEXER BRANCHING UNIT AND ITS CONTROL METHOD - An optical add-drop multiplexer branching unit and its control method are provided according to the present disclosure. The optical add-drop multiplexer branching unit includes: four wavelength division multiplexers WDM1 to WDM4 and a first optical switch module, where WDM1 to WDM4 are configured to divide or combine wavelengths of signals; the first optical switch module is configured to control connection and disconnection of signals that leave and enter the four wavelength division multiplexers; the first optical switch module includes port | 08-29-2013 |
20120155857 | METHOD, APPARATUS AND UNIT FOR DETECTING FAULT OF SUBMARINE DEVICE - The embodiments of the present invention relate to optical communication technologies, and provide a method, an apparatus, and a unit for detecting a fault of a submarine device. The apparatus includes: a pair of optical couplers that are respectively set on two optical cables for transmitting optical signals in opposite direction and are configured to receive or send optical detection signals through the optical cables, where: the two optical couplers are connected through an optical fiber that transmits an optical detection signal, and a photosensitive component is set on the optical fiber and is configured to adjust an optical parameter of the optical detection signal by perceiving change of an ambient environment state parameter when a fault occurs. The embodiments of the present invention bring benefits of detecting whether a target submarine device is faulty, and locating a cause for the fault of the submarine device accurately. | 06-21-2012 |
20120121267 | OPTICAL ADD-DROP MULTIPLEXER BRANCHING UNIT AND CORRESPONDING OPTICAL TRANSMISSION METHOD AND SYSTEM - Embodiments of the present invention provide an Optical Add-Drop Multiplexer (OADM) Branching Unit (BU) and the corresponding optical transmission method and system. The method includes: separating a part of optical signals of different wavelengths from two trunk fibers respectively, coupling the part of optical signals of different wavelengths, and transmitting the coupled optical signals to a branch station through a fiber; separating, according to wavelengths, optical signals that have different wavelengths and are transmitted by the branch station through a fiber, and then transmitting the optical signals to the two trunk fibers respectively; separating null-compensation light from the optical service signals transmitted through a fiber by the branch station to obtain the null-compensation light; coupling the null-compensation light with the part of optical signals that have different wavelengths and are respectively separated from the two trunk fibers, and transmitting the coupled optical signals to the branch station through a fiber. | 05-17-2012 |
20120106947 | METHOD FOR MONITORING FIBER LINE STATE, REPEATER, SUBMARINE CABLE SYSTEM - The present invention relates to communications technologies, and discloses a method for monitoring the state of a fiber line, a repeater, and a submarine cable system. The repeater includes a first optical amplifier (OA), a second optical amplifier, a first gating unit, a second gating unit, a first coupler, a second coupler, a third coupler, and a fourth coupler. The first coupler, the fourth coupler, and the first gating unit form an in-to-in loopback path between the input end of the first OA and the input end of the second OA; and the second coupler, the third coupler, and the second gating unit form an out-to-out loopback path between the output end of the first OA and the output end of the second OA. | 05-03-2012 |