Optical transmission system, management device, and signal adjustment method

摘要

An optical transmission system includes: a plurality of optical transmission devices each including: an adjustment unit to adjust optical power of channels in the WDM optical signal; and a controller to control the adjustment unit based on an adjustment amount, and a management device including: a converter to convert an evaluation value for evaluating quality of service provided by using the channels in the WDM optical signal into a threshold value of transmission quality to be satisfied by the channels; and a determination unit to calculate the transmission quality of the channels based on monitoring information of the channels in the WDM optical signal adjusted by the adjusting unit of at least one of the plurality of optical transmission devices and to determine the adjustment amount to be set for the optical transmission device so that the calculated transmission quality of the channels satisfy the threshold value.

主权项

1. An optical transmission system comprising:
a plurality of optical transmission devices that transmit a wavelength division multiplexed (WDM) optical signal through an optical transmission path, a respective optical transmission device including
an adjustment unit configured to adjust optical power of channels in the WDM optical signal, anda controller configured to control the adjustment unit based on an adjustment amount including a first adjustment amount when transmission quality of a particular channel among other channels in the WDM optical signal does not satisfy a threshold value of transmission quality to be satisfied by the channels and a second adjustment amount, after the first adjustment amount, when at least one of the other channels in the WDM optical signal other than the particular channel does not satisfy the threshold value; and a management device to manage the plurality of optical transmission devices, the management device including
a converter configured to convert an evaluation value for evaluating quality of service provided by using the channels in the WDM optical signal into the threshold value of transmission quality to be satisfied by the channels, anda determination unit configured to
calculate the transmission quality of the channels based on monitoring information of the channels in the WDM optical signal adjusted by the adjusting unit of at least one of the plurality of optical transmission devices, anddetermine the adjustment amount to be set for the optical transmission device so that the calculated transmission quality of the channels in the WDM optical signal satisfy the threshold value when a delay time allowed during transmission of the WDM optical signal and acquired as the evaluation value indicates a shortest time.