Subscriber apparatus, optical communication system and optical signal monitoring method

A subscriber device in an optical communication system, the optical communication system including the subscriber device, a user device connected to the subscriber device, an optical switch that relays an optical signals between devices, a control unit that allocates information regarding at least a wavelength, a time, a polarized wave, a mode, a code, a frequency, a core, a core wire, or a combination thereof to the user device;

• and an optical switch control unit that controls the optical switch such that an optical signal of the optical signals transmitted to the subscriber device from the user device is output to another port connected to a transmission line corresponding to a transfer destination on a path to a destination device, the subscriber device comprising:
• a monitoring unit configured to monitor an optical signal transmitted from the user device;
• wherein the monitoring unit gives an instruction to the user device when the optical signal transmitted from the user device is different from the information allocated by the control unit, and transmits an optical signal through the optical switch when the optical signal transmitted from the user device is identical to the information allocated from the control unit;
• and
• a downlink monitoring unit configured to monitor an optical signal output from the optical switch,
• wherein when the optical signal output from the optical switch is different from information allocated by the control unit, the downlink monitoring unit notifies the control unit or inquiries about the information, or instructs the user device to receive the optical signal in accordance with downlink information.

A subscriber device in an optical communication system, the optical communication system including the subscriber device, a user device connected to the subscriber device, an optical switch that relays optical signals between devices, a control unit that allocates information regarding at least a wavelength, a time, a polarized wave, a mode, a code, a frequency, a core, a core wire, or a combination thereof to the user device;

• and an optical switch control unit that controls the optical switch such that an optical signal of the optical signals transmitted to the subscriber device from the user device is output to another port connected to a transmission line corresponding to a transfer destination on a path to a destination device, the subscriber device comprising:
• a filter configured to transmit, in the optical signal transmitted from the user device, the optical signal satisfying a condition set in accordance with the information allocated by the control unit;
• wherein the filter filters and blocks the optical signal transmitted from the user device when the optical signal is different from information allocated from the control unit,
• a downlink monitoring unit configured to monitor an optical signal output from the optical switch,
• wherein when the optical signal output from the optical switch is different from information allocated by the control unit, the downlink monitoring unit notifies the control unit or inquiries about the information, or instructs the user device to receive the optical signal in accordance with downlink information.