| 主权项 |
1. A communication terminal device, comprising:
a plurality of wireless communication units each comprising a receiver and a transmitter, and each configured to communicate with a corresponding wireless communication network; a handover factor detecting unit configured to detect an occurrence of a handover factor when one of the wireless communication units communicates with the corresponding wireless communication network; a power supply unit configured to provide power to each of the plurality of wireless communication units; a storage unit configured to store a detection order for a handover between different wireless communication networks; and a controller configured to: control the power supply unit to provide power to a first unit of the plurality of wireless communication units corresponding to a first wireless communication network; control the power supply unit to provide power to a second unit of the plurality of wireless communication units, based on the detection order, in order to detect a second network communication network corresponding to the second unit, when the handover factor detecting unit detects an occurrence of the handover factor during communication with a base station in the first wireless communication network, wherein the detection order comprises a power consumption order based on a power consumption of the transmitter in each of the wireless communication units; and the controller is further configured to detect the second wireless communication network based on the power consumption order and sequentially specifies wireless communication networks based on the power consumption order and supplies power from the power supply unit to the corresponding wireless communication unit for a predetermined time period; determine when a power consumption of the second unit is higher than a power consumption of the first unit, after the second wireless communication network is detected based on the detection order; handover from the first wireless communication network to a second wireless communication network, when the power consumption of the second unit is not higher than the power consumption of the first unit; and handover from the base station in the first wireless communication network to another base station in the first wireless communication network when the power consumption of the second unit is higher than the power consumption of the first unit, wherein the controller is further configured to determine one of the detected wireless communication networks as the second wireless communication network, when at least two wireless communication networks are detected as candidate destinations with a same destination priority order. |
