Patent ID: 8078176

Claim:
A radio communication apparatus that operates with an internal battery and is connectable to a plurality of radio communication networks, the radio communication apparatus comprising: a network connection transceiver configured to connect to any one of the radio communication networks using a radio signal; a handover processor configured to control a handover from a currently-connected radio communication network to one of other radio communication networks; a voltage detector configured to detect a current output voltage outputted by the battery; a dropped voltage amount acquiring unit configured to acquire a voltage drop value that would occur as the network connection unit is to be connected to at least one of the other radio communication networks used in the ongoing handover; a comparison unit is configured to obtain a predicted voltage by subtracting the voltage drop value that would occur from the current output voltage; and compare the predicted voltage against a predetermined threshold; and detect whether the predicted voltage is no more than said threshold; and an operation controller configured to stop the handover controller from executing the handover to the at least one of other radio communication network, upon detecting that the predicted voltage is not more than said threshold.