Terminal and method for connecting to target devices

1. A terminal comprising:

a communication interface configured to communicate using a short-range wireless protocol;

a camera; and

one or more processors configured to:

receive advertisement information including shape information and distance information from a plurality of target devices;

control the camera to photograph a selected target device of the plurality of target devices;

input a photographed image of the selected target device to one or more trained machine learning models to obtain estimated shape information of the selected target device;

obtain an estimated distance from the selected target device based on the photographed image; and

establish a connection with the selected target device via the communication interface using the estimated shape information, the estimated distance, and the received advertisement information.

2. The terminal of claim 1 , wherein the one or more trained machine learning models is trained to associate images of target devices with corresponding shape information.

3. The terminal of claim 1 , wherein the one or more processors are further configured to:

when the estimated shape information of the selected target device matches shape information, included in the received advertisement information, of a first target device and a second target device of the plurality of target devices, obtain a first distance from the first target device based on a strength of a first signal received from the first target device and obtain a second distance from the second target device based on a strength of a second signal received from the second target device; and

identify the first target device or the second target device as the selected target device for establishing the connection based on the first distance or the second distance being closer to the estimated distance from the selected target device.

4. The terminal of claim 3 , wherein:

advertisement information received from the first target device comprises transmission power of the first target device;

advertisement information received from the second target device further comprises transmission power of the second target device; and

wherein the one or more processors are further configured to:

obtain the first distance based on the first transmission power and the strength of the first signal received from the first target device; and

obtain the second distance based on the second transmission power and the strength of the second signal received from the second target device.

5. The terminal of claim 1 , wherein:

advertisement information received from the selected target device includes shape information and model information of the selected target device; and

the one or more processors are further configured to obtain detailed information of the selected target device from a detailed information list including detailed information of the plurality of target devices,

wherein the detailed information is obtained based on the shape information and model information of the selected target device.

6. The terminal of claim 5 , wherein the one or more processors are further configured to obtain information on a communication protocol and a provided service of the selected target device via the obtained detailed information of the selected target device.

7. The terminal of claim 1 , wherein the short-range wireless protocol is BLUETOOTH low energy (BLE).

8. A method of establishing a connection at a terminal using a short-range wireless protocol, the method comprising:

receiving, at the terminal, advertisement information including shape information and distance information from a plurality of target devices;

photographing a selected target device of the plurality of target devices;

inputting a photographed image of the selected target device to one or more trained machine learning models to obtain estimated shape information of the selected target device;

obtaining an estimated distance from the selected target device based on the photographed image; and

establishing a connection with the selected target device using the estimated shape information, the estimated distance, and the received advertisement information.

9. The method of claim 8 , wherein the one or more trained machine learning models is trained to associate images of target devices with corresponding shape information.

10. The method of claim 8 , further comprising:

when the estimated shape information of the selected target device matches shape information, included in the received advertisement information, of a first target device and a second target device of the plurality of target devices, obtaining a first distance from the first target device based on a strength of a first signal received from the first target device and obtaining a second distance from the second target device based on a strength of a second signal received from the second target device; and

identify the first target device or the second target device as the selected target device for establishing the connection based on the first distance or the second distance being closer to the estimated distance from the selected target device.

11. The method of claim 10 , wherein:

advertisement information received from the first target device comprises transmission power of the first target device;

advertisement information received from the second target device further comprises transmission power of the second target device; and

the method further comprises:

obtaining the first distance based on the first transmission power and the strength of the first signal received from the first target device; and

obtaining the second distance based on the second transmission power and the strength of the second signal received from the second target device.

12. The method of claim 8 , wherein:

advertisement information received from the selected target device includes shape information and model information of the selected target device; and

the method further comprises obtaining detailed information of the selected target device from a detailed information list including detailed information of the plurality of target devices,

wherein the detailed information is obtained based on the shape information and model information of the selected target device.

13. The method of claim 12 , further comprising obtaining information on a communication protocol and a provided service of the selected target device via the obtained detailed information of the selected target device.

14. The method of claim 8 , wherein the short-range wireless protocol is BLUETOOTH low energy (BLE).