Mobile communication terminal for decreasing SAR value and method of controlling the same

• US 9,698,846 B2
• Filed: 03/04/2014
• Issued: 07/04/2017
• Est. Priority Date: 03/08/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Park, Soo-Pyoung, Kim, Yong-Yi, Jang, Jea-Dong
• Primary Examiner(s): Batista, Marcos
• Application Number:
  US14/196,421
• Publication Number:
  US 20140256378A1
• Time in Patent Office: 1,218 Days
• Field of Search: 4555521, 370338
• CPC Class Codes: H04B 1/3838 Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
• CPC Class Codes: H04B 7/0404 the mobile station comprising multiple antennas, e.g. to provide uplink diversity
• CPC Class Codes: H04B 7/0426 Power distribution
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A method of controlling a mobile communication terminal including a first antenna and a second antenna is provided. The method includes receiving transmission data to be transmitted, applying first power smaller than a first threshold value to the first antenna, applying second power smaller than the first threshold value to the second antenna, and cooperatively transmitting the transmission data based on the first power and the second power, respectively, by the first antenna and the second antenna, wherein a sum of the first power and the second power is larger than a second threshold value.

Claims

1. A method of controlling a mobile communication terminal comprising a first antenna and a second antenna, the method comprising:

receiving transmission data to be transmitted;

applying first power to the first antenna;

applying second power to the second antenna;

cooperatively transmitting the transmission data based on the first power and the second power, respectively, by the first antenna and the second antenna;

determining whether the first power is smaller than a first predetermined power value, the first predetermined power value being associated with a predetermined specific absorption rate (SAR) value;

scheduling, when the first power is larger than or equal to the first predetermined power value, the first power to be smaller than the first predetermined power value;

determining whether the second power is smaller than the first predetermined power value; and

scheduling, when the second power is larger than or equal to the first predetermined power value;

the second power to be smaller than the first predetermined power value,

wherein a sum of the first power and the second power is larger than a second predetermined power value.

2. The method of claim 1, wherein the second predetermined power value is a power value for generating a value of transmission signal strength when the power is applied to a single antenna.

3. The method of claim 1,

wherein the applying of the first power to the first antenna comprises applying a value of power scheduled to be smaller than the first predetermined power value, and

wherein the first predetermined power value is associated with a predetermined SAR value.

4. The method of claim 1,

wherein the applying of the second power to the second antenna comprises applying a value of power scheduled to be smaller than the first predetermined power value, and

wherein the first predetermined power value is associated with a predetermined SAR value.

5. The method of claim 1,

wherein the applying of the first power to the first antenna comprises applying time dependent power scheduled to be having a maximum value smaller than the first predetermined power value, and

wherein the first predetermined power value is associated with a predetermined SAR value.

6. The method of claim 5,

wherein the applying of the second power to the second antenna comprises applying time dependent power scheduled to be a maximum value smaller than the first predetermined power value, and

wherein the first predetermined power value is associated with a predetermined SAR value.

7. A mobile communication terminal for transmitting a transmission signal to an outside, the mobile communication terminal comprising:

a first antenna and a second antenna configured to cooperatively transmit the transmission signal;

a control chip configured to;

receive transmission data to be transmitted,

apply first power to the first antenna, and

apply second power to the second antenna;

a transceiver configured to;

receive the transmission data from the control chip, and

amplify the received transmission data; and

a first modulator and a second modulator configured to;

modulate the transmission data input from the transceiver, and

output the modulated transmission data to the first antenna and the second antenna, respectively,

wherein the control chip is further configured to;

determine whether the first power is smaller than a first predetermined power value, the first predetermined power value being associated with a predetermined specific absorption rate (SAR) value,

schedule, when the first power is larger than or equal to the first predetermined power value, the first power to be smaller than the first predetermined power value,

determine whether the second power is smaller than the first predetermined power value, and

schedule, when the second power is larger than or equal to the first predetermined power value, the second power to be smaller than the first predetermined power value, and

wherein a sum of the first power and the second power is larger than a second predetermined power value.

8. The mobile communication terminal of claim 7, wherein the second predetermined power value is a power value for generating a value of transmission signal strength when the power is applied to a single antenna.

9. The mobile communication terminal of claim 7,

wherein the control chip is further configured to apply the first power scheduled to the first antenna by applying a value of power smaller than the first predetermined power value, and

wherein the first predetermined power value is associated with a predetermined SAR value.

10. The mobile communication terminal of claim 7,

wherein the control chip is further configured to apply the second power scheduled to the second antenna by applying a value of power smaller than the first predetermined power value, and

wherein the first predetermined power value is associated with a predetermined SAR value.

11. The mobile communication terminal of claim 7,

wherein the control chip is further configured to apply the first power scheduled to the first antenna by applying time dependent power smaller than the first predetermined power value, and

wherein the first predetermined power value is associated with a predetermined SAR value.

12. The mobile communication terminal of claim 11,

wherein the control chip is further configured to apply the second power scheduled to the second antenna by applying time dependent power smaller than the first predetermined power value, and

wherein the first predetermined power value is associated with a predetermined SAR value.

13. A method of controlling a mobile communication terminal comprising a plurality of antennas, the method comprising:

receiving transmission data to be transmitted;

applying power scheduled to be smaller than a first predetermined power value, the first predetermined power value being associated with a predetermined specific absorption rate (SAR) value to the plurality of antennas;

cooperatively transmitting, by the plurality of antennas, the transmission data based on the power applied to the plurality of antennas;

determining whether respective power applied to each of the plurality of antennas is smaller than the first predetermined power value; and

scheduling, when the respective power applied to each of the plurality of antennas is larger than or equal to the first predetermined power value, the respective power applied to each of the plurality of antennas to be smaller than the first predetermined power value,

wherein a sum of the power applied to the plurality of antennas is scheduled to be larger than a second predetermined power value.

14. The method of claim 13, wherein the second predetermined power value is a power value of a power for generating a value of transmission signal strength when the power is applied to a single antenna.

15. A non-transitory computer readable medium for storing an algorithm for scheduling of power applied to a plurality of antennas, wherein the algorithm comprises:

receiving transmission data to be transmitted;

applying power scheduled to be smaller than a first predetermined power value, the first predetermined power value being associated with a predetermined specific absorption rate (SAR) value to the plurality of antennas;

cooperatively transmitting, by the plurality of antennas, the transmission data based on the power applied to the plurality of antennas;

determining whether respective power applied to each of the plurality of antennas is smaller than the first predetermined power value; and

scheduling, when the respective power applied to each of the plurality of antennas is larger than or equal to the first predetermined power value, the respective power applied to each of the plurality of antennas to be smaller than the first predetermined power value,

wherein a sum of the power applied to the plurality of antennas is scheduled to be larger than a second predetermined power value.

16. The non-transitory computer readable medium of claim 15, wherein the second predetermined power value is a power value of a power for generating a value of transmission signal strength when the power is applied to a single antenna.