RADIO COMMUNICATION SYSTEM
PROBLEM TO BE SOLVED: To provide a radio communication system capable of preventing interference that is caused, when a plurality of mobile radio stations almost simultaneously perform transmission, even if unique numbers are not given to the mobile radio stations. SOLUTION: When a CPU 210 of a mobi...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a radio communication system capable of preventing interference that is caused, when a plurality of mobile radio stations almost simultaneously perform transmission, even if unique numbers are not given to the mobile radio stations. SOLUTION: When a CPU 210 of a mobile radio station 2 detects that a transmission button (not shown) is depressed, the CPU 210 uses a DTMF (dual tone multi-frequency) generation circuit 206 to generate a DTMF signal showing a transmission request and uses a transmission circuit 208 to transmit the DTMF signal; and when a DTMF conversion circuit 205 detects a DTMF signal, showing transmission inhibition during after lapse of preset time t1 until the lapse of a preset time t2, transmission is performed, and when the DTMF signal showing transmission inhibition is detected during the other time durations, and transmission is not performed. COPYRIGHT: (C)2005,JPO&NCIPI |
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