| 摘要 |
PURPOSE:To reduce an error of reception quality measurement due to fading by identifying an in-zone area of a portable equipment when the portable equipment is moved at a low speed or stopped based on the reception quality not for one frequency but for two frequencies or over. CONSTITUTION:Radio channel transmitters-receivers 3-1-3-n of a required number are installed to a base station depending on number of mobile equipments in the base station. The radio channel transmitter-receiver, e.g. 3-1 among them is used exclusively for the control channel, and when a moving equipment is in idle state, so-called in the standby state, the control channel is used for the reception. The mobile equipment uses a receiver 8 to receive the frequency of the control channel and the frequency of any one or plural of the transmitters-receivers 3-2-3-n alternately and the mean value is used as a mean level of radio waves from the base station. The mobile equipment receives two or more radio channels of other base stations similarly and uses the mean value as a mean reception level from other base station and decides the area of an in-zone base station based on the mutual comparison of the mean level. The control such as designation of the reception frequency and averaging of the reception level is implemented by a control circuit 11. |
