Optical transport system, orchestrator, control method, and storage medium of control program

An orchestrator that is connected to a plurality of nodes constituting an optical transport network and connected to a first computer and a second computer that perform communication via the optical transport network, the orchestrator comprising:

• a reception unit, including one or more processors, configured to receive a communication requirement related to communication with the second computer from the first computer;
• a calculation unit, including one or more processors, configured to determine an optical path to be used for the communication based on the communication requirement and a transport quality of an optical transport path of the optical transport network, and calculate setting information to be set to an optical network device of each of the plurality of nodes to construct the optical path, wherein the transport quality comprises non-linear effects including interphase modulation and four-wave mixing depending on a wavelength in use, and
• a first transmission unit, including one or more processors, configured to transmit the setting information to the optical network device to each of the plurality of nodes;
• a second transmission unit, including one or more processors, configured to transmit a setting completion notification of the optical path constructed in the optical transport network to the first computer after receiving a setting completion response of the setting information from the plurality of nodes;
• wherein the calculation unit is configured to determine an optical path in a communication section between the first computer and the second computer such that a single optical path is selected in a communication section where a communication bandwidth included in the communication requirement can be satisfied with a single optical path, and a plurality of optical paths is selected in a communication section where a single optical path cannot satisfy the communication bandwidth until the communication requirement is satisfied.

A control method for an optical transport network performed by a plurality of nodes constituting the optical transport network, a first computer and a second computer that perform communication via the optical transport network, and an orchestrator connected to the plurality of nodes and the first computer and the second computer, the control method comprising:

• by the first computer, transmitting a communication requirement related to communication with the second computer to the orchestrator;
• by the orchestrator, receiving the communication requirement from the first computer;
• determining an optical path to be used for the communication based on the communication requirement and a transport quality of an optical transport path of the optical transport network, and calculating setting information to be set to an optical network device of each of the plurality of nodes to construct the optical path, wherein the transport quality comprises non-linear effects including interphase modulation and four-wave mixing depending on a wavelength in use, wherein the optical path is determined such that, in a communication section between the first computer and the second computer, one optical path is selected in a communication section in which a communication bandwidth included in the communication requirement can be satisfied with one optical path, and a plurality of optical paths are selected in a communication section in which the communication bandwidth cannot be satisfied with one optical path until the communication requirement is satisfied;
• transmitting the setting information to the optical network device to each of the plurality of nodes;
• by each of the plurality of nodes, receiving the setting information to the optical network device of a local node from the orchestrator;
• setting the setting information to the optical network device of the local node;
• transmitting a setting completion response of the setting information to the orchestrator after completing setting of the setting information;
• by the orchestrator, transmitting a setting completion notification of the optical path constructed in the optical transport network to the first computer after receiving the setting completion response from the plurality of nodes;
• and
• by the first computer, receiving the setting completion notification from the orchestrator.