Method and device for transmitting and receiving multimedia data

An apparatus for receiving multimedia data in a hybrid network system, the apparatus comprising:

• a transceiver;
• at least one processor;
• and
• a memory communicatively coupled to the at least one processor and configured to store instructions thereon,
• wherein the at least one processor, upon execution of the instructions, is configured to:
• control the transceiver to receive multimedia data from a broadcast server,
• identify lost data in the multimedia data,
• determine whether reconstruction of the lost data is possible through an application layer forward error correction (AL-FEC) based on the lost data,
• when the reconstruction of the multimedia data is not possible through the AL-FEC while receiving the multimedia data from the broadcast server, control the transceiver to request an automatic repeat request (ARQ) for a retransmission of the lost data in the multimedia data through an intermediate node of a network in the hybrid network system while receiving the multimedia data from the broadcast server,
• control the transceiver to receive retransmitted data corresponding to the lost data based on the ARQ from a broadband server, and
• reconstruct the lost data based on the retransmitted data.

A method of transmitting multimedia data by a broadband server in a hybrid network system, the method comprising:

• receiving, by a transceiver, multimedia data from a broadcast server;
• receiving, by the transceiver from a client device, an automatic repeat request (ARQ) for the multimedia data through an intermediate node of a network in the hybrid network system;
• generating or selecting, by at least one processor, symbols for reconstruction of lost data in the multimedia data based on information included in the ARQ;
• and
• while the client device receives the multimedia data from the broadcast server, transmitting the symbols together with an ARQ response to the client device.

An apparatus for transmitting multimedia data in a hybrid network system, the apparatus comprising:

• a transceiver;
• at least one processor;
• and
• a memory communicatively coupled to the at least one processor and configured to store instructions thereon,
• wherein the at least one processor, upon execution of the instructions, is configured to:
• control the transceiver to receive multimedia data from a broadcast server,
• control the transceiver to receive an automatic repeat request (ARQ) for the multimedia data from a client device through an intermediate node of a network in the hybrid network system,
• generate or select symbols for reconstruction of lost data in the multimedia data based on information included in the ARQ, and
• while the client device is receiving the multimedia data from the broadcast server, transmit the symbols together with an ARQ response to the client device.