Packet transmission/reception apparatus and method using forward error correction scheme
A packet transmission/reception apparatus and method is provided. The packet transmission method of the present invention includes acquiring a source payload including partial source symbols from a source block, generating a source packet including the source payload and an identifier (ID) of the source payload, generating a repair packet including a repair payload corresponding to the source payload and an ID of the repair payload, generating a Forward Error Correction (FEC) packet block including the source and repair packets, and transmitting the FEC packet block. The source payload ID includes a source payload sequence number incrementing by 1 per source packet. The packet transmission/reception method of the present invention is advantageous in improving error correction capability and network resource utilization efficiency.
1. A packet transmission method comprising:
identifying a mode of source packet block generation;
generating a source packet block that includes at least one source packet, a source packet including a source payload and a source payload identifier (ID) of the source payload;
generating a repair packet block that includes at least one repair packet, a repair packet including a repair payload corresponding to at least one source payload and a repair payload ID of the repair payload; and
transmitting the repair packet block, and
wherein the source payload ID includes a source payload sequence number that starts from an arbitrary value and is initialized to 0 after reaching a maximum value, and
wherein the mode of source packet block generation provides information on a size of the source payload.
2. The packet transmission method of claim 1 , wherein the source payload ID and the repair payload ID are generated based on the mode of source packet block generation.
3. The packet transmission method of claim 1 , wherein the repair payload ID comprises an initial sequence number indicating the source payload sequence number corresponding to a first source payload in the source packet block.
4. The packet transmission method of claim 1 , wherein the repair payload ID comprises a repair payload ID for identifying the repair payload of the repair packet, and
wherein the repair payload ID starts at 0 and is incremented by 1 with each repair payload in the repair packet block.
5. The packet transmission method of claim 1 , wherein the repair payload ID comprises a repair payload length indicator indicating a number of repair payload included in the repair packet block.
6. The packet transmission method of claim 1 , wherein the repair payload ID comprises a source payload length indicator indicating a number of source payloads included in the source packet block.
7. A packet transmission apparatus, the apparatus comprising:
a transmitter configured to transmit a repair packet block; and
a controller configured to:
control a packet generator for identifying a mode of source packet block generation,
generate a source packet block that includes at least one source packet, a source packet including a source payload and a source payload identifier (ID) of the source payload, and
generate the repair packet block that includes at least one repair packet, a repair packet including a repair payload corresponding to at least one source payload and a repair payload ID of the repair payload,
wherein the source payload ID includes a source payload sequence number that starts from an arbitrary value and is initialized to 0 after reaching a maximum value, and
wherein the mode of source packet block generation provides information on a size of the source payload.
8. The packet transmission apparatus of claim 7 , wherein the source payload ID and the repair payload ID are generated based on the mode of source packet block generation.
9. The packet transmission apparatus of claim 7 , wherein the repair payload ID comprises an initial sequence number indicating the source payload sequence number corresponding to a first source payload in the source packet block.
10. The packet transmission apparatus of claim 7 , wherein the repair payload ID comprises a repair payload ID for identifying the repair payload of the repair packet, and
wherein the repair payload ID starts at 0 and is incremented by 1 with each repair payload in the repair packet block.
11. The packet transmission apparatus of claim 7 , wherein the repair payload ID comprises a repair payload length indicator indicating a number of repair payloads included in the repair packet block.
12. The packet transmission apparatus of claim 7 , wherein the repair payload ID comprises a source payload length indicator indicating a number of source payloads included in the source packet block.