Electronic device and control method thereof

1. An electronic device comprising:

a communicator comprising communication circuitry; and

a processor configured to:

control the communicator to perform communication with an external device based on identifying that a strength of a signal received from the external device is equal to or greater than a predetermined threshold value;

control the electronic device to convert to a low power mode after identifying that the strength of the signal received from the external device is equal to or greater than the predetermined threshold value, and

control the electronic device to perform a secure pairing operation based on identifying, after converting to the low power mode, that a strength of a signal received from the external device is within a first range.

2. The electronic device as claimed in claim 1 , wherein the processor is configured to control the communicator to transmit a response signal comprising a second parameter to the external device based on receiving a request signal comprising a first parameter used in a public key encryption from the external device through the communicator, and

to control the electronic device to perform the secure pairing operation based on the first parameter and the second parameter based on identifying that a strength of a signal of the request signal falls within the first parameter.

3. The electronic device as claimed in claim 2 , wherein the processor is configured to control the electronic device to perform the secure pairing operation based on a first secure key generated based on the first parameter and the second parameter and a second secure key generated from the external device, and

wherein the second secure key is generated based on the first parameter and the second parameter, based on identifying that a strength of a signal of the response signal received from the external device is within the first range.

4. The electronic device as claimed in claim 1 , wherein the processor is configured to control the communicator to perform communication with the external device at a corresponding point-of-time based on a strength of a signal received from the external device being within a second range and identifying that the strength of the signal is equal to or greater than the predetermined threshold value at a particular point-of-time.

5. The electronic device as claimed in claim 4 , wherein the first range is determined based on a degradation range of signal strength by the second range and the low power mode.

6. The electronic device as claimed in claim 1 , wherein the external device comprises a software access point (AP), and

wherein the processor is configured to control the communicator to perform a Wi-Fi communication with the software AP based on identifying that a strength of a Wi-Fi signal received from the external device is equal to or greater than the predetermined threshold value.

7. The electronic device as claimed in claim 1 , further comprising:

a display;

wherein the processor is configured to control the display to provide a guide UI guiding the electronic device to separate from the external device based on the electronic device being within a specified proximity of the external device and after tagging the electronic device to the external device.

8. The electronic device as claimed in claim 1 , further comprising:

wherein the first range is to be determined based on a degradation range of signal strength by the low power mode.

9. An electronic system including a first electronic device and a second electronic device, the electronic system comprising:

the first electronic device configured to perform communication with the second electronic device based on identifying that a strength of a signal received from the second electronic device is equal to or greater than a predetermined threshold value, convert to a low power mode after identifying that the strength of the signal received from the second electronic device is equal to or greater than the predetermined threshold value, and to perform a secure pairing operation based on identifying, after converting to the low power mode, that a strength of a signal received from the second electronic device is within a first range; and

the second electronic device is configured to perform a secure pairing operation based on performing communication with the first electronic device and identifying that a strength of a signal received from the first electronic device is within the first range.

10. The electronic system as claimed in claim 9 , wherein the first electronic device is configured to transmit a response signal comprising a second parameter to the second electronic device based on receiving a request signal comprising a first parameter from the second electronic device, and to generate a first secure key based on the first parameter and the second parameter based on identifying that a strength of a signal of the request signal is within a first range,

wherein the second electronic device is configured to generate a second secure key based on the first parameter and the second parameter based on receiving a response signal comprising the second parameter from the first electronic device and identifying that a strength of a signal of the response signal is within the first range, and

wherein the first and second electronic devices are configured to perform the secure pairing operation based on the first secure key and the second secure key.

11. The electronic system as claimed in claim 9 ,

wherein the first range is to be determined based on a degradation range of signal strength by the low power mode.

12. A method of controlling an electronic device comprising:

performing communication with an external device based on identifying that a strength of a signal received from the external device is equal to or greater than a predetermined threshold value;

converting to a low power mode after identifying that the strength of the signal received from the external device is equal to or greater than the predetermined threshold value; and

performing a secure pairing operation based on identifying, after converting to the low power mode, that a strength of a signal received from the external device is within a first range.

13. The method as claimed in claim 12 , wherein the performing the secure pairing operation comprises:

transmitting a response signal comprising a second parameter to the external device based on receiving a request signal comprising a first parameter used in a public key encryption from the external device, and

performing the secure pairing operation based on the first parameter and the second parameter based on identifying that a strength of a signal of the request signal is within the first range.

14. The method as claimed in claim 13 , wherein the performing of the secure pairing operation comprises:

performing the secure pairing operation based on a first secure key generated based on the first parameter and the second parameter and a second secure key generated from the external device, and

wherein the second secure key, based on identifying that a strength of a signal of the response signal received from the external device is within the first range, is generated based on the first parameter and the second parameter.

15. The method as claimed in claim 12 , wherein the performing the communication comprises performing communication with the external device at a corresponding point of time based on a strength of a signal received from the external device being within a second range and identifying that the strength of the signal is equal to or greater than the predetermined threshold value at a particular point-of-time.

16. The method as claimed in claim 15 , wherein the first range is determined based on a degradation range of signal strength by the second range and the low power mode.

17. The method as claimed in claim 12 , wherein the external device comprises a software access point (AP), and

wherein the performing the communication comprises performing a Wi-Fi communication with the software AP based on identifying that a strength of a Wi-Fi signal received from the external device is equal to or greater than the predetermined threshold value.

18. The method as claimed in claim 12 further comprising:

providing a guide UI guiding the electronic device to separate from the external device based on the electronic device being within a specified proximity with the external device and after tagging the electronic device to the external device.

19. The method as claimed in claim 12 , wherein the predetermined threshold value is −10 dBm, and

wherein the first range is in a 0-80 dB range.

20. The method as claimed in claim 12 further comprising:

wherein the first range is determined based on a degradation range of signal strength by the low power mode.