Device and method for controlling power in mobile terminal
A device and a method for controlling a transmission power in a mobile terminal are provided. The device includes an antenna set in an optimized state, a memory including a power control table that includes transmission power control data for satisfying a Specific Absorption Rate (SAR) standard in a state where efficiency of the antenna is optimized, a sensor for detecting a distance between the mobile terminal and a user, a controller for receiving distance data from the sensor and for outputting transmission power control data corresponding to the distance data by referring to the power control table, and a power amplifier connected between a transmitter and the antenna for controlling transmission power of a signal according to the transmission power control data and for outputting the signal to the antenna.
1. A method comprising:
detecting, by a sensor of an electronic device, a distance between a user and the electronic device adapted to transmit a signal using a transmission power;
determining, by at least one processor of the electronic device, whether the distance is less than a predetermined distance;
acquiring, by the at least one processor, based at least in part on a determination that the distance is less than the predetermined distance, power control data corresponding to the distance from a power control table stored at the electronic device;
adjusting, by the at least one processor, the transmission power to a first transmission power according to the power control data based at least in part on a determination that the distance falls into a first specified range;
adjusting, by the at least one processor, the transmission power to a second transmission power according to the power control data based at least in part on a determination that the distance falls into a second specified range; and
transmitting, via an antenna of the electronic device, the signal using a corresponding one of the first transmission power and the second transmission power.
2. The method of claim 1 , wherein the sensor comprises a proximity sensor.
3. The method of claim 1 , wherein the acquiring of the power control data comprises:
selecting the power control table from a plurality of power control tables based at least in part on a location of the electronic device.
4. The method of claim 1 , wherein the power control table comprises a first power control table and a second power control table, the first power control table including first transmission power control data corresponding to a first country or a first area, and the second power control table including second transmission power control data corresponding to a second country or a second area.
5. The method of claim 1 , wherein the adjusting of the transmission power comprises:
decreasing or increasing the transmission power as the distance is decreased or increased, respectively.
6. The method of claim 1 , wherein the adjusting of the transmission power comprises:
setting, as the adjusted transmission power, a power that satisfies a specific absorption rate (SAR) standard of a country or area in which the electronic device is located.
7. The method of claim 1 , wherein the transmitting of the signal comprises:
transmitting the signal using the transmission power as unadjusted if the distance does not fall into a specified range.
8. The method of claim 1 , wherein the detecting of the distance between the user and the electronic device comprises:
detecting the distance while the electronic device is in a call mode.
9. An apparatus comprising:
an antenna configured to transmit a signal using a transmission power;
a sensor configured to detect a distance between a user and the apparatus; and
at least one processor operatively coupled with the antenna, the at least one processor configured to:
determine whether the distance is less than a predetermined distance,
acquire power control data corresponding to the distance from a power control table stored at the electronic device based at least in part on a determination that the distance is less than the predetermined distance,
adjust the transmission power to a first transmission power according to the power control data based at least in part on a determination that the distance falls into a first specified range,
adjust the transmission power to a second transmission power according to the power control data based at least in part on a determination that the distance falls into a second specified range, and
transmit, via the antenna, the signal using corresponding one of first adjusted transmission power and the second transmission power.
10. The apparatus of claim 9 , wherein the at least one processor is further configured to:
receive, via the antenna, a reception signal using a reception power different from the transmission power.
11. The apparatus of claim 10 , wherein the at least one processor is further configured to:
maintain a reception efficiency during the receiving of the reception signal.
12. The apparatus of claim 9 , wherein the at least one processor is further configured to:
select the power control table from a plurality of power control tables based at least in part on a location of the apparatus.
13. The apparatus of claim 12 , wherein the power control table comprises a first power control table and a second power control table, the first power control table including first transmission power control data corresponding to a first country or a first area, and the second power control table including second transmission power control data corresponding to a second country or a second area.
14. The apparatus of claim 9 , wherein the at least one processor is further configured to:
decrease or increase the transmission power as the distance is decreased or increased, respectively.
15. The apparatus of claim 9 , wherein the at least one processor is further configured to:
set, as the adjusted transmission power, a power that satisfies a specific absorption rate (SAR) standard of a country or area in which the apparatus is located.
16. The apparatus of claim 9 , further comprising:
an amplifier,
wherein the at least one processor is further configured to control the amplifier to amplify the signal using the adjusted transmission power.
17. The apparatus of claim 16 , wherein the at least one processor is further configured to:
transmit, via the antenna, the signal using the transmission power as unadjusted if the distance does not fall into a specified range.
18. A machine-readable storage device storing instructions, the instructions executed by at least one processor cause the at least one processors to perform operations comprising:
determining, by the at least one processor of an electronic device, whether the distance is less than a predetermined distance;
acquiring, by the at least one processor, based at least in part on a determination that the distance is less than the predetermined distance, power control data corresponding to the distance from a power control table stored at the electronic device;
adjusting, by at least one processor, the transmission power to a first transmission power according to the power control data based at least in part on a determination that the distance falls into a first specified range;
adjusting, by the at least one processor, the transmission power to a second transmission power according to the power control data based at least in part on a determination that the distance falls into a second specified range; and
transmitting, via an antenna of the electronic device, the signal using corresponding one of the first transmission power and the second transmission power.