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:
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,
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.
2. 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.
3. 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.
4. The packet transmission method of claim 1 wherein the repair payload ID comprises a repair payload length indicator indicating a number of repair payload in the repair packet block.
5. 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.
6. A packet reception method comprising:
receiving 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,
wherein a source payload and a source payload identifier (ID) of the source payload are included in a source packet, at least one source packet is included in source 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.
7. The packet reception method of claim 6 , 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.
8. The packet reception method of claim 6 , 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.
9. The packet reception method of claim 6 , wherein the repair payload ID comprises a repair payload length indicator indicating a number of repair payloads included in the repair packet block.
10. The packet reception method of claim 6 , wherein the repair payload ID comprises a source payload length indicator indicating a number of source payloads included in the source packet block.
11. A packet transmission apparatus, the apparatus comprising:
a transmitter for transmitting a repair packet block; and
a controller controls a packet generator for 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, and generating 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.
12. The packet transmission apparatus of claim 11 , 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.
13. The packet transmission apparatus of claim 11 , 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.
14. The packet transmission apparatus of claim 11 , wherein the repair payload ID comprises a repair payload length indicator indicating a number of repair payloads included in the repair packet block.
15. The packet transmission apparatus of claim 11 , wherein the repair payload ID comprises a source payload length indicator indicating a number of source payloads included in the source packet block.
16. A packet reception apparatus, the apparatus comprising:
a receiver for receiving 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,
wherein a source payload and a source payload identifier (ID) of the source payload are included in a source packet, at least one source packet is included in source 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.
17. The packet reception apparatus of claim 16 , 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.
18. The packet reception apparatus of claim 16 , 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.
19. The packet reception apparatus of claim 16 , wherein the repair payload ID comprises a repair payload length indicator indicating a number of repair payloads included in the repair packet block.
20. The packet reception apparatus of claim 16 , wherein the repair payload ID comprises a source payload length indicator indicating a number of source payloads included in the source packet block.