Qos control device in multi-wireless network environment for video transmission and a controlling method thereof

An electronic device for receiving and reproducing contents, the electronic device comprising:

• a communicator communicable with an external device through a plurality of frequency bands;
• and
• a processor configured to, based on a signal including original data of contents being received from the external device through a main frequency band of the communicator, and a connection state signal including information on the original data being received from the external device through at least one sub frequency band of the communicator:
• determine a reception state of the received original data through the main frequency band based on the information included in the connection state signal, and
• control the communicator to transmit, to the external device through the main frequency band and the at least one sub frequency band, a response signal including information on the determined reception state of the original data.

A controlling method of an electronic device for transmitting contents, the method comprising:

• transmitting, to an external device through a main frequency band, a signal including original data of contents, and transmitting, to the external device through at least one sub frequency band, a connection state signal including information on the original data;
• receiving, from the external device, a response signal including information on a reception state of the original data received by the external device;
• and
• transmitting, to the external device based on the response signal, at least one of a signal including first quality data of the contents and a signal including second quality data of the contents, the first quality data being a higher quality than the second quality of data.

An electronic device for transmitting contents, the electronic device comprising:

• a communicator communicable with an external device through a plurality of frequency bands;
• and
• a processor configured to:
• control the communicator to transmit, to the external device through a main frequency band, a signal including original data of contents, and transmit, to the external device through at least one sub frequency band, a connection state signal including information on the original data, and
• based on a response signal including information on a reception state of the original data received by the external device being received from the external device through the communicator, control the communicator to transmit, to the external device based on the response signal, at least one of a signal including first quality data and a signal including second quality data.