Station-side terminal apparatus, optical access network, and communication method

摘要

The station-side terminal apparatus for the optical access network includes: the station-side terminal apparatus; the subscriber-side terminal apparatuses connected to the station-side terminal apparatus via the optical transmission line; the terminal devices to which mutually different wavelengths are assigned; and the communication failure detecting unit. Each of the terminal devices includes the uplink communication state monitoring unit configured to monitor a state of uplink communication for each registered subscriber-side terminal apparatus, on the basis of the input uplink signal, and the downlink communication failure information extracting unit configured to extract information of a state of downlink communication, which is transmitted from the registered subscriber-side terminal apparatus. The communication failure detecting unit detects a failure of the uplink communication and a failure of the downlink communication, on the basis of the state of the uplink communication and the state of the downlink communication.

主权项

1. A station-side terminal apparatus of an optical access network the optical access network including the station-side terminal apparatus and a plurality of subscriber-side terminal apparatuses connected to the station-side terminal apparatus via an optical transmission line, the station-side terminal apparatus comprising:
a plurality of terminal devices to which mutually different wavelengths are assigned; and a communication failure detecting unit, wherein each of the terminal devices includes
a uplink communication state monitoring unit configured to monitor a state of uplink communication for each registered subscriber-side terminal apparatus, on the basis of an input uplink signal, anda downlink communication failure information extracting unit configured to extract information of a state of downlink communication, which is transmitted from the registered subscriber-side terminal apparatus, wherein the communication failure detecting unit detects a failure of the uplink communication and a failure of the downlink communication, on the basis of the state of the uplink communication and the state of the downlink communication, and wherein
when the communication failure detecting unit determines that the failure of the uplink communication has occurred, the terminal device of a registration destination of the subscriber-side terminal apparatus in which the failure of the uplink communication has occurred transmits a signal that instructs switch of a transmission wavelength or switch of a transmission-and-reception wavelength, to the subscriber-side terminal apparatus in which the failure of the uplink communication has occurred, andwhen the communication failure detecting unit determines that the failure of the downlink communication has occurred, the terminal device of the registration destination of the subscriber-side terminal apparatus in which the failure of the downlink communication has occurred transmits a signal that instructs switch of a reception wavelength or switch of a transmission-and-reception wavelength, to the subscriber-side terminal apparatus in which the failure of the downlink communication has occurred.