| 摘要 |
PURPOSE:To make it possible to obtain an answer from the best fixed stations of plural fixed stations by using a radio communication circuit (short-wave circuit) of inferior transmission quality to send inquiries from a mobile station to the fixed stations in the same group in polling mode. CONSTITUTION:When mobile station (a) is to obtain answers by sending inquiries to fixed stations X1-X3 in group G1, mobile station (a) sends a predetermined inquiry telegraphic message to plural fixed stations X1-X3 by way of a modulation part, transmission part and antenna provided to the mobile station. On receiving the inquiry telegraphic message, respective fixed stations send it to memory parts 28- 30 by way of interfaces 25-27 provided to the central controller of the group. Respective received data stored are read out being synchronized by synchronization part 31 and error correction part 32 finds a fixed station that has detected minimum- error data, so that the best fixed station, such as X2, will send an answer telegraphic message to mobile station (a) under the control of the central controller. |
