| 摘要 |
A plurality of radio networks for transmitting data include a head end unit and a plurality of work stations. The head end unit receives a radio signal output from a given work station, converts the reception signal into a radio signal of a different frequency, and re-radiates the signal to all the work stations. Each work station includes a data processor, a receiving section for receiving and demodulating the radio signal from the head end unit to obtain data supplied from another work station, and supplying the obtained data to the data processor, and a unit for receiving transmission data generated by the data processor, and converting the transmission data into a radio signal and radiating the radio signal, thereby transmitting the transmission data to another work station through the head end unit.
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