Fault protection method, device, and system for optical network

An optical controller in an optical network, wherein the optical network further comprises a first optical fiber, a first optical service and a second optical service are transmitted over the first optical fiber, the first optical service corresponds to an IP service transmitted over a first IP link in an IP network, the second optical service corresponds to an IP service transmitted over a second IP link in the IP network,

• wherein the optical controller comprises:
• at least one processor;
• one or more memories coupled to the at least one processor and storing programming instructions, wherein the at least one processor is configured to execute the programming instructions to cause the optical controller to:
• receive an indication that the first optical service belongs to a first priority and the second optical service belongs to a second priority, wherein when the first optical fiber is faulty, a protected priority of any optical service belonging to the first priority is higher than a protected priority of any optical service belonging to the second priority;
• and
• preferentially protect the first optical service belonging to the first priority when the first optical fiber is faulty.

A network system, wherein the network system comprises an optical network and a cross-layer controller, the cross-layer controller is connected to the optical network and an IP network, the optical network comprises an optical controller and an optical fiber, a first optical service and a second optical service are transmitted over the optical fiber, the first optical service corresponds to an IP service transmitted over a first IP link in the IP network, and the second optical service corresponds to an IP service transmitted over a second IP link in the IP network, wherein

• the cross-layer controller is configured to send, to the optical controller, an indication that the first optical service belongs to a first priority and the second optical service belongs to a second priority, wherein the first priority is related to a feature of the first IP link, and the second priority is related to a feature of the second IP link, and when the optical fiber is faulty, a protected priority of any optical service belonging to the first priority is higher than a protected priority of any optical service belonging to the second priority;
• and
• the optical controller is configured to:
• receive an indication that the first optical service belongs to the first priority and the second optical service belongs to the second priority, and preferentially protect the first optical service belonging to the first priority when the optical fiber is faulty.