| 摘要 |
Provided are a time synchronization method, apparatus and system. The method comprises: a CMTS device acquires a data flow from an SNI, extracts a time message from the data flow including the time message and a data message, then sends the time message to a CM via a signalling channel and sends the data message to the CM via a data channel, wherein the signalling channel and the data channel are different in working frequency points. Since the signalling channel transmitting the time message has a fixed processing time delay, there is no time delay variation, and precision of time information in the transmitted time message is guaranteed, so that precise time synchronization in a DOCSIS network can be realized. |
