Optical transmission device and optical transmission method
AssigneeFujitsu Limited
InventorAyumu Nonaka
Life of this patent
Estimating the term…
Abstract
An optical transmission device includes: a switching configured to be capable of switching a transmission path to which light is input from a first transmission path to a second transmission path; a first calculation unit configured to calculate, based on a difference between a first light level of the first transmission path and a second light level of the second transmission path, a first control amount for the second light level; and a control unit configured to perform a first control in which the second light level is decreased or increased based on the first control amount upon switching of the transmission path.
Claims12
An optical transmission device comprising:
- a switch configured to be capable of switching a transmission path for transmitting light from a first transmission path to a second transmission path;
- a first calculation unit configured to calculate, based on a difference between a first light level of the first transmission path and a second light level of the second transmission path, a first amount for controlling the second light level;
- and
- a control unit configured to perform, upon switching of the transmission path, a first control in which the second light level is decreased or increased based on the first amount by switching from performing a first feedback control in which the first light level is decreased or increased based on a second amount calculated based on the first light level.
An optical transmission device comprising:
- a switching circuit configured to being capable of switching a transmission path to which light is input, from a first transmission path with a first light level to a second transmission path with a second light level,
- wherein the switching circuit switches from the first transmission path to the second transmission path based on an occurrence of an optical line failure in the first transmission path, and switches a first feedback control in which the first light level is decreased or increased based on an attenuated first light level obtained by attenuating the first light level of the first transmission path to a control in which the second light level is decreased or increased based on a difference between the first light level of the first transmission path and the second light level of the second transmission path.
An optical transmission method comprising:
- switching a transmission path to which light is input from a first transmission path to a second transmission path;
- calculating, by a processor, a first amount for controlling the second light level based on a difference between a first light level of the first transmission path and a second light level of the second transmission path;
- and
- performing, upon switching of the transmission path, a control in which the second light level is decreased or increased based on the first amount upon switching of the transmission path by switching from performing a first feedback control in which the first light level is decreased or increased based on a second amount calculated based on the first light level.
Dependencies are inferred from the claim text.