| 摘要 |
A radio terminal apparatus is arranged by a signal receiving circuit for receiving an externally supplied signal; a power supply for supplying electric power to each of circuit portions of the radio terminal apparatus; judging means for judging a reception signal field strength of the received external signal; and a power supply control unit for intermittently supplying the electric power derived from the power supply to the signal receiving circuit, while changing a power supplying period in response to the reception signal field strength judged by the judging means under call waiting state of the radio terminal apparatus. Further, a mobile communication system is arranged by these radio terminal apparatus, radio base station control apparatus, and radio base station apparatus. |
