Wi-Fi direct connection method using access point and device having Wi-Fi direct connection function

1. A Wi-Fi Direct connection method for a plurality of devices, the method comprising:

connecting a first device and a second device through an access point (AP);

making a request by the first device to perform a Wi-Fi Direct connection;

transmitting the request by the first device to the second device through the AP;

changing the state of the second device into a standby mode, in which the second device is available for Wi-Fi Direct connection to the first device, in a response to receiving the request through the AP;

performing provisioning discovery by the first device after making the request for the Wi-Fi Direct connection and exchanging a provisioning method with the second device; and

accepting the Wi-Fi Direct connection in response to the second device receiving the provisioning discovery request from the first device which has requested the Wi-Fi Direct connection.

2. The method according to claim 1 , wherein the performing and the exchanging are accomplished without displaying by the second device a menu in a UI for user's selection regarding acceptance of the request for the Wi-Fi Direct connection, if the second device is set in advance to accept the Wi-Fi Direct connection, and

the second device displays the menu in the UI for user's selection regarding acceptance of the request for the Wi-Fi Direct connection, if the second device is not set in advance to accept the Wi-Fi Direct connection.

3. The method according to claim 1 , wherein the Wi-Fi Direct connection requested by the first device is performed through a user input of the first device.

4. The method according to claim 3 , wherein the Wi-Fi Direct connection requested by the first device is performed by activating a button of a UI for the Wi-Fi Direct connection.

5. The method according to claim 1 , wherein the first and second devices are aware of the other devices information in advance.

6. The method according to claim 1 , wherein the first and second devices recognize in advance that each other is connected to the AP.

7. The method according to claim 1 , wherein the second device transmits a provisioning discovery reply to the first device when receiving the provisioning discovery request from the first device.

8. A device for a Wi-Fi Direct connection with another device, the device comprising:

a communicator which performs wired/wireless communication with the other device through an access point (AP); and

a controller which is changed to a standby mode, so that the controller is available for the Wi-Fi Direct connection to the other device when receiving the Wi-Fi Direct connection request from the other device through the AP and accepts the Wi-Fi Direct connection with the other device when receiving a provisioning discovery request from the other device which has requested the Wi-Fi Direct connection.

9. The device according to claim 8 , wherein the controller accomplishes performing a provisioning discovery with the other device and exchanging the provisioning discovery with the other device through the Wi-Fi Direct connection without displaying a menu in a UI for use's selection regarding acceptance of the request for the Wi-Fi Direct connection, if the device is set in advance to accept the Wi-Fi Direct connection, and to display the menu in the UI for user's selection regarding acceptance of the request for the Wi-Fi Direct connection, if the device is not set in advance to accept the Wi-Fi Direct connection.

10. The device according to claim 8 , further comprising a storage which stores therein information of the other device.

11. The device according to claim 8 , wherein the controller recognizes in advance that the other device is connected to the AP.

12. The device according to claim 8 , wherein the controller transmits a provisioning discovery reply to the other device when receiving the provisioning discovery request from the other device.