| 摘要 |
PROBLEM TO BE SOLVED: To transmit a main signal by a non-reproduction repeating and to transmit-it control data to each station by a time division without losing synchronism, in a digital radio repeating system. SOLUTION: In this digital radio repeating, a first system transmitting control data and a second system transmitting a main signal are provided. The second system transmits the main signal and is used for the synchronizing of a carrier signal and a transmission clock signal. Namely, repeating stations 22 and 23 and a reception terminal station 24 operate by synchronizing with the carrier signal and the transmission clock signal of a transmission terminal station 21. The monitoring controller (AS) provided on each station transmits control data on the second system only when the polling of the present station is performed at the time of a polling operation. Namely, when the polling of an other station is performed, the transmission of control data is stopped. As a result, the synchronism is not lost and control data can be transmitted. |
