| 摘要 |
PURPOSE:To eliminate the need for the response of a reception side and also to eliminate the need for a control station in a loop transmission system, by carrying about the initiative of communication to every station, and collating a signal after one round with a transmitted signal. CONSTITUTION:Communication stations 11-1n are connected through a communication line 2 in series, and carry about the initiative of communication. A station having the initiative transmits a circulating communication frame together with inserted data. The station collates the signal received after one round with the previously transmitted signal to confirm whether the communication is normal or not. Then, when they are not coincident, the data and frame are resent. |
