OPTICAL COMMUNICATION PATH OPENING METHOD AND MANAGEMENT CONTROL APPARATUS
Provided is a method for opening an optical communication path, in which one or more optical switches include a plurality of first ports and a plurality of second ports, and a management control device switches connection such that other first ports grouped with a transmission port connected first port of the one or more optical switches connected to a transmission port of the one subscriber device are sequentially connected to one second port to which a response request signal is input, transmits the response request signal to the one second port each time the connection is switched, specifies a reception port connected first port connected to a reception port of the one subscriber device in accordance with reception of a response signal in response to the response request signal, and sets a connection relation between the ports of the one or more optical switches such that an optical signal input to the transmission port connected first port reaches an optical transmission line to which a reception port of another subscriber device serving as a communication partner is connected and an optical signal transmitted from a transmission port of the another subscriber device reaches the reception port connected first port.
1 . An optical communication path opening method in an optical communication system that performs two-core transmission in which at least one newly connected subscriber device and one or more optical switches are connected to each other through a plurality of optical transmission lines and an upstream optical signal and a downstream optical signal are transmitted through different optical transmission lines, wherein
the one or more optical switches include a plurality of first ports and a plurality of second ports,
a management control device switches connection such that other first ports grouped with a transmission port connected first port of the one or more optical switches connected to a transmission port of the one subscriber device are sequentially connected to one second port to which a response request signal is input,
the management control device transmits the response request signal to the one second port each time the connection is switched,
the management control device specifies a reception port connected first port connected to a reception port of the one subscriber device in accordance with reception of a response signal in response to the response request signal, and
the management control device sets a connection relation between the ports of the one or more optical switches such that an optical signal input to the transmission port connected first port reaches an optical transmission line to which a reception port of another subscriber device serving as a communication partner is connected and an optical signal transmitted from a transmission port of the another subscriber device reaches the reception port connected first port.
2 . The method for opening an optical communication path according to claim 1 , wherein
the optical switch including the transmission port connected first port is provided with an optical detection unit configured to detect an optical signal input to the optical switch in association with the first port, and
the management control device specifies the transmission port connected first port on the basis of the detection result of the optical detection unit.
3 . The method for opening an optical communication path according to claim 1 , wherein
the management control device receives the response signal by switching the connection relation between the ports of the one or more optical switches to connect a second port of the one or more optical switches to which a reception port of the management control device is connected to the specified transmission port connected first port.
4 . The method for opening an optical communication path according to claim 1 , wherein
the management control device switches connection such that second ports other than the second port of the one or more optical switches to which the reception port of the management control device is connected are sequentially connected to the other first ports.
5 . The method for opening an optical communication path according to claim 14 , wherein
in a case in which the one or more optical switches are one optical switch,
optical transmission lines connected to each of the plurality of first ports of the one optical switch are accommodated in one optical cable, and
the management control device switches connection such that other first ports connected to optical transmission lines other than an optical transmission line connected to the transmission port connected first port among the optical transmission lines accommodated in the one optical cable are sequentially connected to the one second port to which the response request signal is input.
6 . The method for opening an optical communication path according to claim 1 , wherein
in a case in which the one or more optical switches are a first optical switch and a second optical switch,
at least some of optical transmission lines connected to each of the plurality of first ports of the first optical switch and at least some of optical transmission lines connected to each of the plurality of first ports of the second optical switch are accommodated in one optical cable, and
the management control device switches connection such that other first ports connected to optical transmission lines other than an optical transmission line connected to the transmission port connected first port among the optical transmission lines accommodated in the one optical cable are sequentially connected to the one second port to which the response request signal is input.
7 . The method for opening an optical communication path according to claim 1 , wherein
in a case in which the one or more optical switches are a first optical switch and a second optical switch,
at least some of optical transmission lines connected to each of the plurality of first ports of the first optical switch are accommodated in a first optical cable, and at least some of optical transmission lines connected to each of the plurality of first ports of the second optical switch are accommodated in a second optical cable, and
the management control device switches connection such that other first ports connected to optical transmission lines other than an optical transmission line connected to the transmission port connected first port among the optical transmission lines accommodated in the second optical cable are sequentially connected to the one second port to which the response request signal is input.
8 . A management control device provided in an optical communication system that performs two-core transmission in which at least one newly connected subscriber device and one or more optical switches are connected to each other through a plurality of optical transmission lines and an upstream optical signal and a downstream optical signal are transmitted through different optical transmission lines,
the one or more optical switches including a plurality of first ports and a plurality of second ports,
the management control device comprising:
an optical switch controllor configured to switch connection such that other first ports grouped with a transmission port connected first port of the one or more optical switches connected to a transmission port of the one subscriber device are sequentially connected to one second port to which a response request signal is input; and
a subscriber device management controllor configured to transmit the response request signal to the one second port each time the connection is switched, wherein
the subscriber device management controllor specifies a reception port connected first port connected to a reception port of the one subscriber device in accordance with reception of a response signal in response to the response request signal, and
the optical switch controllor sets a connection relation between the ports of the one or more optical switches such that an optical signal input to the transmission port connected first port reaches an optical transmission line to which a reception port of another subscriber device serving as a communication partner is connected and an optical signal transmitted from a transmission port of the another subscriber device reaches the reception port connected first port.