| 摘要 |
PURPOSE:To attain talking without interference by using the control by the multi-channel access technology to from a radio channel, switching a frequency to other frequency at radio wave disturbance to recover talking thereby forming an independent channel at each of optional number of radio equipments. CONSTITUTION:When an interference radio wave close to a transmission frequency f1 of a portable radio equipment 9 is generated, an interference detector DT of a base station 8 detects it and its information is sent to a control channel control section CONT. A CPU in a control section uses an outgoing channel time slot T9 to the radio equipment 9 so as to give an instruction of a new channel CH designation signal to switch the frequency from a frequency f1 to a frequency f9. The base station 8 receiving the new channel CH switching end signal through a control channel fc2 from the radio equipment 9 changes the reception frequency of a receiver Rx9 from the frequency f1 to a frequency f9 to bring the mode to the reception state. The similar process is applied to other portable radio equipments 10-16. If the frequency f9 has disturbance, other frequency is assigned. |
