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Path switching apparatus and path switching method

A technology of path switching and equipment, applied in multiplex communication, optical multiplex system, line transmission components, etc., can solve problems such as damage to submarine cables

Pending Publication Date: 2021-04-30
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, submarine cables laid on the seabed can be damaged in some cases, and there is a risk of power supply being stopped via the damaged submarine cable

Method used

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  • Path switching apparatus and path switching method
  • Path switching apparatus and path switching method
  • Path switching apparatus and path switching method

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0023] (first exemplary embodiment)

[0024] Referring to the drawings, a first exemplary embodiment of the present invention will be described in detail. figure 1 An outline of the configuration of the path switching device according to the present exemplary embodiment is shown. The path switching device according to the present exemplary embodiment includes a first switch 1 , a second switch 2 , a detection circuit 3 and a control circuit 4 . The first switch 1 is an example of a first switching device. The second switch 2 is an example of a second switching device. The detection circuit 3 is an example of detection means. The control circuit 4 is an example of a control device. The first switcher 1 uses a first switch, thereby switching a connection between a predetermined optical path and any one of the optical fibers of the third submarine cable connected to the optical branching / inserting device and the optical fiber of the first submarine cable. The second switcher...

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Abstract

In order to provide a path switching apparatus capable of continuing communication by operation corresponding to the state of occurrence of a failure, this path switching apparatus is configured to be provided with a first switching device 1, a second switching device 2, a detection circuit 3, and a control circuit 4. The first switching device 1 switches, using a first switch, connection between a first submarine cable and either a predetermined optical path or a third submarine cable connected to an optical branching / insertion device. The second switching device 2 switches, using a second switch, connection between a second submarine cable and either the predetermined optical path connected to the first switch or the third submarine cable connected to the optical branching / insertion device. The detection circuit 3 detects the state of an optical signal inputted via the third submarine cable. The control circuit 4 controls switching of the switches on the basis of electric power supplied through the first submarine cable or the second submarine cable. The control circuit 4 controls the switches on the basis of the state of detection of an optical signal.

Description

technical field [0001] The present invention relates to subsea cable systems, and in particular to subsea installations. Background technique [0002] In many cases, a submarine cable system employs a configuration in which a branch unit and a reconfigurable optical add-drop multiplexer (ROADM) unit are connected to each other as a device that splits a part of a wavelength-multiplexed optical signal to the branch station side. Due to the size limitation of the casing of the seabed equipment, the branch unit and the ROADM unit cannot be integrally configured, and thus, a configuration in which ROADM units connected via a seabed cable are arranged near the branch unit is employed in some cases. [0003] Subsea equipment such as branch units and ROADM units operate based on power supplied from a terminal station on land via a power line of a subsea cable. Therefore, in order to perform continuous communication in the submarine cable system, it is necessary to stably supply pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/03H04B3/44H04B10/291H04J14/02
CPCH04B3/44H04Q11/0062H04Q2011/0081H04J14/0289H04B10/038H04B10/03H04B10/291
Inventor 高桥正树
Owner NEC CORP