| 摘要 |
PURPOSE:To attain the call reply with a desired mobile station among lots of mobile stations by dividing a moving region of a mobile station and sending a call signal from a fixed station arranged in each region in time division and sending a reply signal from the mobile station after a fixed delay time. CONSTITUTION:Fixed stations L1-Lm are arranged in territorial regions A1-Am, the fixed stations L1-Lm are controlled for the transmission operation by a control station C0 and call signals CA1-CAm including an identification signal of the fixed station are sent sequentially in each territorial region sequentially. Mobile stations M1-Mn are movable optionally in the regions A1-Am and receive a call signal from the territorial fixed station. The boundary of the regions A1-Am is set to be overlapped together slightly and the mobile stations M1-Mn receive any of the call signals from the fixed stations L1-Lm without fail. After the mobile stations M1-Mm receive any call signal from the fixed stations L1-Lm, the mobile stations send reply signals R1-Rn after a prescribed delay time d11-d1n set based on the final sending of a call signal CAm from a fixed station Lm. Thus, the fixed station can identify the mobile station in a time from the sending of the call signal to the reception of the replay signal. |
