| 摘要 |
A station device is connected to a plurality of subscriber devices and comprises a reception unit that receives signals from the subscriber devices. A reception level measurement unit measures the levels of reception by the reception unit. A transmission instruction unit causes each of the subscriber devices to transmit a pattern for measurement continuing for a predetermined time in an interval when no data is transmitted by the subscriber devices. A recognition control unit controls a signal recognition method for a signal received from the subscriber device based on the reception level of the pattern for measurement transmitted from the subscriber device and measured by the reception level measurement unit.
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