Patent ID: 8693390

Claim:
A mobile telephone having a relaying function, the relaying function being a function of wirelessly connecting to an external device and a base station and of relaying data between the external device and the base station, the mobile telephone comprising: a first wireless communication unit configured to perform wireless communication with the external device; a second wireless communication unit configured to perform wireless communication with the base station; and a transmission power controller configured to control transmission power of the second wireless communication unit according to a communication environment within a limit of a first maximum power, wherein the transmission power controller controls the transmission power of the second wireless communication unit within a limit of a second maximum power during a relay period, the relay period being a period in which the mobile telephone relays data between the external device and the base station, the second maximum power being smaller than the first maximum power, and controls the transmission power of the second wireless communication unit within the limit of the first maximum power when voice communication is started in a course of the control using the second maximum power, the first maximum power is defined so that a specific absorption rate (SAR) value measured at a first location is at or below a predetermined limit when the second wireless communication unit transmits data at the first maximum power, and the second maximum power is defined so that a SAR value measured at a second location is at or below the predetermined limit when the second wireless communication unit transmits data at the second maximum power, the second location being closer to the mobile telephone than the first location.