| 摘要 |
PURPOSE:To attain talking without any interference from other channel by forming an independent channel at each optional number of portable radio equipments among lots or portable radio equipments. CONSTITUTION:A manager resides in a radio base station 8 and workers possess portable radio equipments 9-16. The multi-channel access (MCA) technology developed recently and used frequency in various radio systems, especially in a mobile radio system is used for the portable radio equipments. The said MCA technology makes it possible to set lots of number of transmittable channels of the portable radio equipments and up to nearly 1000 channels are put into practical use. Thus, the equipments act like equipments having 1000 crystals in comparison with one or two crystal deciding the transmission frequency in conventional technology. |
