| 摘要 |
<p>PROBLEM TO BE SOLVED: To avoid collision of transmission signals, without interfering with the current transmission, when a new transmission device starts a new transmission, during the current transmission in an impulse signal line by the transmitting device. SOLUTION: During the term of transmission, enabling time 51 set in a transmission device 1, the transmission signal (impulse signal) of the transmission device 1 is detected periodically by each radio receiving unit 36 of the transmission devices 2 and 3. When the transmission signal is detected, a control signal of detection is generated to an access control unit 37. When the access control unit 37 receives the control signal of detecting the signal transmitted from the transmitting device 1, the access control unit 37 generates a control signal for stopping the transmission to the radio transmission unit 34. In accordance with the control signal of stopping the transmission, the radio transmitting unit 34 stops the transmission and enters a stand-by state of transmission.</p> |
