Optical transmission device, system, and method

An optical transmission system, comprising a first optical transmission device and a second optical transmission device, wherein the first optical transmission device comprises:

• a tributary board, configured to receive a first optical signal carrying client service data, and convert the first optical signal into an electrical signal, wherein the electrical signal is an optical data unit k (ODUk) signal;
• an electric cross unit, configured to receive the electrical signal from the tributary board;
• one or more active line boards;
• one or more protection line boards;
• a first multiplexer/demultiplexer board;
• a second multiplexer/demultiplexer board;
• and
• an optical amplifier board;
• wherein a quantity of the one or more protection line boards is less than a quantity of the one or more active line boards;
• wherein the tributary board, the one or more active line boards, and the one or more protection line boards are electrically connected to the electric cross unit;
• wherein the one or more active line boards, the one or more protection line boards, and the optical amplifier board are optically connected to the first multiplexer/demultiplexer board;
• wherein a second port of the optical amplifier board is configured to transmit an optical signal that carries the client service data;
• wherein when a first preset condition is met, the electric cross unit is configured to copy or schedule, to the one or more protection line boards, the electrical signal that was to be processed by the one or more active line boards, and the first multiplexer/demultiplexer board is configured to perform multiplexing on optical signals carrying the client service data that is processed by the one or more protection line boards;
• wherein the second port of the optical amplifier board of the first optical transmission device is optically connected to the second optical transmission device;
• wherein when a second preset condition is met, an optical connection element of a first active line board of the one or more active line boards is configured to establish an optical channel between the first active line board and the second multiplexer/demultiplexer board, an optical connection element of a first protection line board of the one or more protection line boards is configured to establish an optical channel between the first protection line board and the second multiplexer/demultiplexer board, and an optical connection element of the optical amplifier board is configured to establish an optical channel between the optical amplifier board and the second multiplexer/demultiplexer board;
• wherein in a first transmission direction, the first optical transmission device is configured to receive the client service data, process the client service data, and send, to the second optical transmission device through the second port of the optical amplifier board, a processed optical signal that carries the client service data;
• and when the first preset condition is met, the first optical transmission device is configured to enable the one or more protection line boards;
• and
• in a second transmission direction, the first optical transmission device is configured to receive an optical signal from the second optical transmission device through the second port of the optical amplifier board, process the optical signal, convert the optical signal into received client service data, and send the received client service data to a client side;
• and when the first preset condition is met, the first optical transmission device is configured to enable the one or more protection line boards.

An optical transmission method, applied to an optical transmission device comprising:

• a tributary board, an electric cross unit, an active line board, a protection line board, a first multiplexer/demultiplexer board, a second multiplexer/demultiplexer board, and an optical amplifier board, and the method comprising:
• receiving, by the tributary board, a first optical signal carrying client service data, converting, by the tributary board, the first optical signal into an electrical signal, wherein the electrical signal is an optical data unit k (ODUk) signal;
• receiving, by the electric cross unit, the electrical signal from the tributary board;
• when a first preset condition is met, copying or scheduling, by the electric cross unit to the protection line board, the electrical signal that was to be processed by the active line board;
• when a second preset condition is met, establishing, by optical connection elements comprised on the active line board and the protection line board, an optical channel between a working line board in the active line board and the protection line board and the second multiplexer/demultiplexer board;
• and establishing, by an optical connection element comprised on the optical amplifier board, an optical channel between the optical amplifier board and the second multiplexer/demultiplexer board;
• and
• performing, by the first multiplexer/demultiplexer board, multiplexing on optical signals carrying the client service data that is processed by the protection line board.