MOBILE TERMINAL DEVICE, COMMUNICATION SYSTEM, METHOD OF CONTROLLING ELECTRIC POWER AND ELECTRIC POWER CONTROL PROGRAM

摘要

When a call is transmitted to an emergency telephone number, a mobile terminal device (101) determines that there is an emergency, and notifies reception electric power from a mobile-communication base station (102) to a mobile-communication switching station (103), during an emergency communication. When the emergency communication ends, the mobile terminal device (101) controls to shift to a special mode operating by reducing electric power consumption. On the other hand, the mobile-communication switching station (103) receives reception electric power from the mobile terminal device (101), and transmits an instruction concerning a new intermittent reception interval to the mobile terminal device (101). The mobile terminal device (101) receives the instruction concerning the new intermittent reception interval, and sets a new intermittent reception interval according to the instruction concerning the intermittent reception interval. Thereafter, the mobile terminal device (101) performs an intermittent reception operation following the new set intermittent reception interval.