METHOD FOR NETWORK CODING FOR COOPERATIVE RELAY NETWORK IN WIRELESS COMMUNICATION SYSTEM

• US 20140380133A1
• Filed: 11/22/2013
• Published: 12/25/2014
• Est. Priority Date: 06/25/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation), SungKyunKwan University's Research & Business Foundation (SungKyunKwan University)
• Original Assignee: LG Electronics, Inc. (LG Corporation), SungKyunKwan University's Research & Business Foundation (SungKyunKwan University)
• Inventors: SEO, Hanbyul, KIM, Byounghoon, KIM, Dongin, CHUN, Youngjin, CHOI, Wan
• Granted Patent: US 9,184,871 B2
• Time in Patent Office: Days
• US Class Current: 714/776
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/0077 Cooperative coding
• CPC Class Codes: H04L 2001/0097 Relays

Abstract

A method for processing a signal at a relay node in a wireless communication system is disclosed. More specifically, the relay node receives a codeword broadcast from a source node. Here, the codeword is partitioned into a plurality of sub-blocks by the source node. Then, the relay node generates two network encoded codewords by combining linearly the plurality of sub-blocks and transmits the two network encoded codewords to a destination node.

Claims

1. A method for processing a signal at a relay node in a wireless communication system, the method comprising:

receiving a codeword broadcasted from a source node, wherein the codeword is partitioned into a plurality of sub-blocks;

generating two network encoded codewords by combining linearly the plurality of sub-blocks; and

transmitting the two network encoded codewords to a destination node.

2. The method of claim 1, wherein generating two network encoded codewords comprising superposing the two network encoded codewords.

3. The method of claim 1, wherein the destination node detects the codeword by using a zero-forcing receiver.

4. The method of claim 1, wherein receiving the codeword comprises checking for error using the cyclic redundancy check (CRC) code.

5. The method of claim 4, further comprising:

if a part of the codeword is not received correctly, the part of the codeword is treated as erasure when generating two network encoded codewords.

6. A relay node in a wireless communication system, the method comprising:

means for receiving a codeword broadcasted from a source node, wherein the codeword is partitioned into a plurality of sub-blocks;

means for generating two network encoded codewords by combining linearly the plurality of sub-blocks; and

means for transmitting the two network encoded codewords to a destination node.

7. The relay node of claim 6, wherein the means for generating the two network encoded codewords is configured to superpose the two network encoded codewords.

8. The relay node of claim 6, wherein the destination node detects the codeword by using a zero-forcing receiver.

9. The relay node of claim 6, wherein the means for receiving the codeword is configured to check for error using the cyclic redundancy check (CRC) code.

10. The relay node of claim 9, wherein, if a part of the codeword is not received correctly, the means for generating the two network encoded codewords is configured to treat the part of the codeword as erasure when generating two network encoded codewords.