Patent ID: 8724507

Claim:
A system for implementing an automatic discovery function in a Dense Wavelength Division Multiplexing, DWDM, network, comprising: an optical supervisory channel, being a bi-directional physical channel, configured to transmit information through multiplexing/de-multiplexing a wavelength independent of a master optical channel with the master optical channel; a first Automatically Switched Optical Network, ASON, control unit, being located in a first node, configured to interact with a second ASON control unit in an adjacent second node through the optical supervisory channel so as to obtain the information of the second ASON control unit; and the second ASON control unit, being located in the second node, configured to interact with the first ASON control unit in the adjacent first node through the optical supervisory channel so as to obtain the information of the first ASON control unit, wherein an automatic discovery function of a physical transport link layer in the DWDM network is implemented through the transmission mechanism of the optical supervisory channel; and the automatic discovery functions of an optical transport section layer and an optical multiplex section layer in the DWDM network are implemented through the transmission mechanism of the optical supervisory channel; the system further comprising: a first optical supervisory device located in the first node and a second optical supervisory device located in the second node, wherein the first ASON control unit in the first node is configured to interact with the first optical supervisory device to transmit a request message to the adjacent second node through a designated optical supervisory channel; the second optical supervisory device is configured to supervise the request message received from the optical supervisory channel in real time, and forward the request message to the second ASON control unit in the second node; the second ASON control unit is configured to interact with the second optical supervisory device to transmit an Identifier, ID, reply message to the first node through the designated optical supervisory channel; the first optical supervisory device is configured to, after detecting the ID reply message in the designated optical supervisory channel, interact with the first ASON control unit to form a neighbor acknowledge request message, and transmit the neighbor acknowledge request message to the second node in the designated optical supervisory channel; and the second ASON control unit is configured to, after receiving the neighbor acknowledge request message through the optical supervisory channel, perform a judgment, form a neighbor acknowledge message according to the judged result, and transmit the neighbor acknowledge message to the first node through the designated optical supervisory channel.