Method and apparatus for transmitting and receiving client signal

A method for receiving a client signal, the method comprising:

• receiving one or more optical carriers in a same optical fiber;
• demodulating transmission channels of a parallel transmission frame from the optical carrier;
• parsing an overhead of the transmission channels of the parallel transmission frame, to obtain channels of the parallel transmission frame, wherein the overhead comprises a frame header identifier, a mapping overhead, and a management overhead that is extracted from one transmission channel in the transmission channels of the parallel transmission frame, wherein the management overhead is used to centrally manage the channels of the parallel transmission frame, and bit rates of the transmission channels of the parallel transmission frame are fixed;
• and
• demapping the client signal from the channels of the parallel transmission frame according to the frame header identifier, the mapping overhead, and the management overhead.

An apparatus comprising:

• a processor;
• and
• a computer-readable storage medium storing a program to be executed by the processor,
• the program including instructions for:
• mapping the client signal into channels of a parallel transmission frame, wherein the parallel transmission frame comprises at least two transmission channels;
• adding an overhead for the channels of the parallel transmission frame after a mapping module performs the mapping, to form transmission channels of the parallel transmission frame, wherein a management overhead is added to one of the channels of the parallel transmission frame after the mapping, the management overhead is used to centrally manage the channels of the parallel transmission frame after the mapping, and bit rates of the transmission channels of the parallel transmission frame are fixed;
• modulating the transmission channels of the parallel transmission frame that are formed by an overhead adding module onto one or more optical carriers in a same optical fiber;
• and
• transmitting the optical carrier after the modulation.

An apparatus comprising:

• a processor;
• and
• a computer-readable storage medium storing a program to be executed by the processor, the program including instructions for:
• receiving one or more optical carriers in a same optical fiber;
• demodulating transmission channels of a parallel transmission frame from the optical carrier;
• parsing an overhead of the transmission channels of the parallel transmission frame that are demodulated by a demodulation module, to obtain channels of the parallel transmission frame, wherein the overhead comprises a frame header identifier, a mapping overhead, and a management overhead that is extracted from one transmission channel in the transmission channels of the parallel transmission frame, wherein the management overhead is used to centrally manage the channels of the parallel transmission frame, and bit rates of the transmission channels of the parallel transmission frame are fixed;
• and
• demapping the client signal from the channels of the parallel transmission frame after the mapping according to the frame header identifier, the mapping overhead, and the management overhead that are parsed by an overhead parsing module.