Abstract: A mobile electronic device according to one aspect includes a position detector that detects the position of the device; an atmospheric pressure sensor that detects the atmospheric pressure; and a controller that determines a specific state if a decrease in the altitude is detected in accordance with the atmospheric pressure and if the amount of change in the altitude per predetermined time satisfies a determination condition. The controller makes a determination as to whether the device is located within a specific area by using the position detector and changes the determination condition in accordance with a result of the determination.

Abstract: A mobile electronic device according to one aspect includes a position detector that detects the position of the device; an atmospheric pressure sensor that detects the atmospheric pressure; and a controller that determines a specific state if a decrease in the altitude is detected in accordance with the atmospheric pressure and if the amount of change in the altitude per predetermined time satisfies a determination condition. The controller makes a determination as to whether the device is located within a specific area by using the position detector and changes the determination condition in accordance with a result of the determination.

Abstract: A terminal 204 requests handover to a base station 201 if the terminal detects deterioration in a communication state during communication with the base station 201. Upon reception of the handover request, the base station 201 obtains information (available base station list) on a plurality of base stations capable of communicating with the terminal 204 from the terminal 204, and based on the information obtained and a value (RTT) indicative of a communication processing time between the base stations, decides a handover destination base station to connect to the terminal 204 for communication.

Abstract: A terminal 204 requests handover to a base station 201 if the terminal detects deterioration in a communication state during communication with the base station 201. Upon reception of the handover request, the base station 201 obtains information (available base station list) on a plurality of base stations capable of communicating with the terminal 204 from the terminal 204, and based on the information obtained and a value (RTT) indicative of a communication processing time between the base stations, decides a handover destination base station to connect to the terminal 204 for communication.