Method and system of file transfer using device-to-device communication technique in messenger

1. A file transfer method comprising:

forwarding, by a first electronic device connected to a communication session of a messaging service, a first message including an identifier of the first electronic device to a second electronic device connected to the communication session through the communication session, in response to selecting a file to be transferred through the communication session;

retrieving, by the second electronic device, a specific identifier of the first electronic device from a list of peripheral devices capable of performing a device-to-device communication and stored in the second electronic device, using the identifier included in the first message;

receiving, by the first electronic device, both (i) a second message including an identifier of the second electronic device and (ii) a request signal requesting the device-to-device communication with the first electronic device, the second message and the request signal being forwarded through the communication session from the second electronic device at a same time in response to the first message;

attempting, by the first electronic device, to set the device-to-device communication with the second electronic device using the identifier of the second electronic device; and

transferring, by the first electronic device, the selected file to the second electronic device through the set device-to-device communication in response to the device-to-device communication being set, and transferring the selected file to the second electronic device through the communication session in response to the device-to-device communication not being set,

wherein the attempting comprises automatically accepting the request signal for the device-to-device communication from the second electronic device in response to the identifier included in the second message matching device information included in the request signal.

2. The method of claim 1 , wherein the attempting comprises broadcasting the identifier of the first electronic device for the device-to-device communication with the second electronic device.

3. The method of claim 1 , wherein the attempting comprises automatically accepting the request signal for the device-to-device communication from the second electronic device using the identifier of included in the second message.

4. The method of claim 1 , wherein the transferring the selected file to the second electronic device through the communication session comprises forwarding the selected file to the second electronic device through the communication session in response to the device-to-device communication not being set during a time period.

5. The method of claim 1 , wherein the first message and the second message are processed as hidden information that is not exposed to users participating in a chatroom provided by the messaging service.

6. The method of claim 1 , further comprising:

receiving the device information through broadcasting, the device information including identifiers of the peripheral devices that are configured to perform the device-to-device communication.

7. The file transfer method of claim 1 , wherein the attempting includes attempting to set the device-to-device communication with the second electronic device for a period time.

8. A non-transitory computer-readable recording medium storing instructions that, when executed by a processor, cause the processor to implement a file transfer method in conjunction with an electronic device, the method comprising:

forwarding a first message including an identifier of a first electronic device connected to a communication session of a messaging service to a second electronic device connected to the communication session of the messaging service through the communication session in response to selecting a file to be transferred through the communication session;

retrieving, by the second electronic device, a specific identifier of the first electronic device from a list of peripheral devices capable of performing a device-to-device communication and stored in the second electronic device, using the identifier included in the first message;

receiving both (i) a second message including an identifier of the second electronic device and (ii) a request signal requesting the device-to-device communication with the first electronic device, the second message and the request signal being forwarded through the communication session from the second electronic device at a same time in response to the first message;

attempting to set the device-to-device communication between the first electronic device and the second electronic device using the identifier of the second electronic device; and

transferring the selected file to the second electronic device through the set device-to-device communication in response to the device-to-device communication being set, and transferring the selected file to the second electronic device through the communication session in response to the device-to-device communication not being set,

wherein the attempting comprises automatically accepting the request signal for the device-to-device communication from the second electronic device in response to the identifier included in the second message matching device information included in the request signal.

9. The non-transitory computer-readable recording medium of claim 8 , wherein the attempting includes attempting to set the device-to-device communication between the first electronic device and the second electronic device for a period time.

10. A file transfer system of an electronic device, the file transfer system comprising:

a memory configured to store computer-readable instructions; and

at least one processor configured to execute the computer-readable instructions such that the at least one processor is configured to,

forward a first message including an identifier of a first electronic device connected to a communication session of a messaging service to a second electronic device connected to the communication session of the messaging service through the communication session of the messaging service in response to selecting a file to be transferred through the communication session,

cause the second electronic device to retrieve a specific identifier of the first electronic device from a list of peripheral devices capable of performing a device-to-device communication and stored in the second electronic device, using the identifier included in the first message,

receive both (i) a second message including an identifier of the second electronic device and (ii) a request signal requesting the device-to-device communication with the first electronic device, the second message and the request signal being forwarded through the communication session from the second electronic device at a same time in response to the first message,

attempt to set the device-to-device communication with the second electronic device using the identifier of the second electronic device, and

transfer the selected file to the second electronic device through the set device-to-device communication in response to the device-to-device communication being set, and transfer the selected file to the second electronic device through the communication session in response to the device-to-device communication not being set,

wherein the at least one processor is further configured to automatically accept the request signal for the device-to-device communication from the second electronic device in response to matching between the identifier of the second electronic device included in the second message and device information included in the request signal.

11. The file transfer system of claim 10 , wherein the at least one processor is configured to broadcast the identifier of the first electronic device for the device-to-device communication with the second electronic device.

12. The file transfer system of claim 10 , wherein

the at least one processor is further configured to automatically accept the request signal for the device-to-device communication from the second electronic device using the identifier of the second electronic device included in the second message.

13. The file transfer system of claim 10 , wherein

the at least one processor is further configured to cause the second electronic device to transmit the request signal for the device-to-device communication to the first electronic device, using the identifier of the first electronic device included in the first message.

14. The file transfer system of claim 10 , wherein the at least one processor is configured to transfer the selected file to the second electronic device through the communication session by transferring the selected file to the second electronic device through the communication session in response to the device-to-device communication not being set during a time period.

15. The file transfer system of claim 10 , wherein the at least one processor are further configured to process the first message and the second message as hidden information that is not exposed to users participating in a chatroom provided by the messaging service.

16. The file transfer system of claim 13 , wherein the at least one processor is further configured to receive the device information through broadcasting, the device information including identifiers of the peripheral devices that are configured to perform the device-to-device communication.

17. The file transfer system of claim 10 , wherein the at least one processor is further configured to attempt to set the device-to-device communication with the second electronic device for a period time.