Abstract: Provided is a mobile terminal apparatus which can realize a long-time wait as follows. The mobile terminal apparatus surely performs a reselection process to increase chances to wait for a host communication system, improve the traffic efficiency, and reduce arrival failures while reducing power consumption. A communication method and a radio network system for the mobile terminal apparatus are also disclosed. The mobile terminal apparatus (mobile telephone 10) includes a communication unit (1) and a control unit (8). The control unit (8) uses the communication unit (1) to periodically monitor presence/absence of a predetermined bit of a paging channel in a base station with which communication is in progress.

Abstract: A wireless device and technology operable to optimize communications during an emergency is disclosed. The wireless device can detect communication congestion in a base station, and search for alternate base stations that can provide annunciation information during the emergency. If a suitable base station can be found, handoff is made and the annunciation information is acquired.

Abstract: A mobile telephone device that selectively switches an LTE communication system that provides a first service and a CDMA communication system that provides a second service for performing communication, includes: a first timer management unit which, after transferring from the LTE communication system to the CDMA communication system and ending communication related to the second service, activates a first timer and detects elapse of the first timer; and a switching unit which switches from the CDMA communication system to the LTE communication system in response to the elapse of the first timer being detected; wherein after ending the communication related to the second service, the first timer management unit changes timing to start the first timer or length of the first timer according to an ending reason of the communication.

Abstract: Provided is a mobile terminal apparatus which can realize a long-time wait as follows. The mobile terminal apparatus surely performs a reselection process to increase chances to wait for a host communication system, improve the traffic efficiency, and reduce arrival failures while reducing power consumption. A communication method and a radio network system for the mobile terminal apparatus are also disclosed. The mobile terminal apparatus (mobile telephone 10) includes a communication unit (1) and a control unit (8). The control unit (8) uses the communication unit (1) to periodically monitor presence/absence of a predetermined bit of a paging channel in a base station with which communication is in progress.

Abstract: A wireless device and technology operable to optimize communications during an emergency is disclosed. The wireless device can detect communication congestion in a base station, and search for alternate base stations that can provide annunciation information during the emergency. If a suitable base station can be found, handoff is made and the annunciation information is acquired.