| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple and relatively low cost time synchronization control method and control device for a wired LAN, capable of avoiding deterioration of time synchronization accuracy caused by the transmission of incorrect timing information.SOLUTION: The time synchronization control device includes: a frame analysis unit 1 for analyzing the header part of a frame to supply to an IFG monitoring unit 2 information on whether or not the frame is a synchronous frame; the IFG monitoring unit 2 for monitoring whether a sufficiently long inter-frame gap (IFG) exists immediately before the frame currently in reception, and when it cannot detect the sufficiently long IFG and receives a synchronous frame detection signal from the frame analysis unit 1, transmitting a frame destruction request signal to a frame destruction unit 3; and the frame destruction unit 3 for processing to add a noise to a currently passing frame signal so that the frame produces an error, on the acquisition of the frame destruction request signal. |
