| 摘要 |
Provided are a method for data communication in an optical network system, a system and a device. A first preamble, a link quality delimiter, data information and first check information are packaged into a first uplink frame through at least one optical network unit, wherein the length of the first preamble is more than the length of a second preamble for uplink service transmission, and the first check information is check information about the data information, and the first uplink frame is transmitted, so that a second optical line terminal can receive the first uplink frame and determine the link quality of a standby link by parsing the uplink frame, thereby ensuring that the second optical line terminal can learn link state information about the standby link in time, avoiding the impact on normal service communication after switching and improving the degree of user satisfaction. |
