Remote control apparatus and electronic device, and system including same

An electronic device, comprising:

• a speaker;
• a communicator;
• a storage configured to store pattern information of non-audible sound for locality identification of the remote controller and the electronic device;
• and
• a processor configured to:
• based on information on ambient sound of the remote controller being received from the remote controller through the communicator, output non-audible sound based on the received information and the stored pattern information through the speaker, and based on a pairing request signal being received from the remote controller, perform pairing with the remote controller.

A controlling method of a remote controller, the method comprising:

• broadcasting information obtained based on ambient sound;
• based on non-audible sound being received from an external electronic device based on the broadcast information, comparing a pattern of the received non-audible sound and prestored pattern information;
• and
• transmitting a pairing request signal to the electronic device based on the comparison result.