METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA IN A WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS A RELAY NODE

• US 20140022982A1
• Filed: 04/19/2012
• Published: 01/23/2014
• Est. Priority Date: 04/19/2011
• 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: Kim, Dongin, Choi, Wan, Seo, Hanbyul, Nam, Sung Sik
• Granted Patent: US 9,571,178 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04B 7/14 Relay systems
• CPC Class Codes: H04B 7/15 Active relay systems
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0077 Cooperative coding
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements

Abstract

A method and apparatus for transmitting and receiving data in a wireless communication system that supports a relay node are disclosed, wherein an open-loop mode is provided between the relay node and a user equipment. A method for transmitting data from a relay node to a user equipment comprises the steps of receiving information on a first condition related to transmission of the data from a base station; receiving first data including a plurality of sequential codes from the base station; and transmitting second data corresponding a part of the first data to the user equipment in accordance with the first condition if decoding of the first code of the plurality of codes is successfully performed.

Claims

1. A method for transmitting data from a relay node to a user equipment, the method comprising the steps of:

receiving information on a first condition related to transmission of the data from a base station;

receiving first data including a plurality of sequential codes from the base station; and

transmitting second data corresponding a part of the first data to the user equipment in accordance with the first condition if decoding of the first code of the plurality of codes is successfully performed.

2. The method according to claim 1, wherein the relay node transmits the other codes of the plurality of codes to the user equipment in accordance with the first condition.

3. The method according to claim 1, wherein the relay node repeatedly transmits a single code next to the first code of the plurality of codes to the user equipment in accordance with the first condition.

4. The method according to claim 1, wherein the relay node repeatedly transmits a single code having priority of the plurality of codes to the user equipment in accordance with the first condition.

5. The method according to claim 1, further comprising the steps of:

receiving first control information from the user equipment, the first control information indicating whether the user equipment has received the second data; and

transmitting the first control information to the base station.

6. The method according to claim 5, further comprising the step of receiving information as to whether the relay node transmits the second data to the user equipment, from the base station in response to the first control information, wherein the first control information is ACK information or HARQ NACK information.

7. The method according to claim 1, further comprising the step of transmitting second control information on reception of the first data to the base station, wherein the second control information is ACK information or HARQ NACK information.

8. A method for receiving data in a user equipment from a relay node and a base station, the method comprising the steps of:

receiving information on a first condition related to reception of the data from the base station;

receiving first data including a plurality of sequential codes from the base station;

receiving second data corresponding a part of the first data from the user equipment; and

decoding the first data and the second data in accordance with the first condition.

9. The method according to claim 8, further comprising the step of transmitting first control information on reception of the second data to the relay node, wherein the first control information is ACK information or HARQ NACK information.

10. A method for transmitting first data from a base station to a relay node and a user equipment, the method comprising the steps of:

transmitting information on a first condition related to transmission of the first data to the relay node and the user equipment;

receiving first control information from the relay node, the first control information indicating whether the user equipment has received second data transmitted from the relay node; and

transmitting information as to whether the relay node transmits the second data to the user equipment, by using the first control information.

11. The method according to claim 10, further comprising the step of receiving second control information indicating whether the relay node has received the first data, from the relay node, wherein the first control information and the second control information are used to determine whether the relay node transmits the second data to the user equipment.

12. The method according to claim 11, wherein the first control information and the second information are ACK information or HARQ NACK information.

13. A relay node transmitting data to a user equipment, the relay node comprising:

a processor;

a reception module receiving information on a first condition related to transmission of the data from a base station and receiving first data including a plurality of sequential codes from the base station; and

a transmission module transmitting second data corresponding a part of the first data to the user equipment in accordance with the first condition if decoding of the first code of the plurality of codes is successfully performed under the control of the processor.

14. The relay node according to claim 13, wherein the processor controls such that the other codes of the plurality of codes are transmitted to the user equipment in accordance with the first condition.

15. The relay node according to claim 13, wherein the processor controls such that a single code next to the first code of the plurality of codes is repeatedly transmitted to the user equipment in accordance with the first condition.

16. The relay node according to claim 13, wherein the processor controls such that a single code having priority of the plurality of codes is repeatedly transmitted to the user equipment in accordance with the first condition.

17. The relay node according to claim 13, wherein, if the reception module receives first control information from the user equipment, the first control information indicating whether the user equipment has received the second data, the processor transmits the first control information to the base station and receives information as to whether the relay node transmits the second data to the user equipment, from the base station in response to the first control information, and the first control information is ACK information or HARQ NACK information.

18. The relay node according to claim 13, wherein the processor controls such that second control information on reception of the first data is transmitted to the base station, and the second control information is ACK information or HARQ NACK information.

19. A user equipment for receiving data from a relay node and a base station, the user equipment comprising:

a transmission module;

a reception module receiving information on a first condition related to reception of the data from the base station, receiving first data including a plurality of sequential codes from the base station, and receiving second data corresponding a part of the first data from the relay node; and

a processor decoding the first data and the second data in accordance with the first condition,

wherein the processor controls such that the transmission module transmits first control information on reception of the second data to the relay node, and the first control information is ACK information or HARQ. NACK information.

20. A base station for transmitting first data to a relay node and a user equipment, the base station comprising:

a transmission module transmitting information on a first condition related to transmission of the first data to the relay node and the user equipment;

a reception module receiving first control information from the relay node, the first control information indicating whether the user equipment has received second data transmitted from the relay node; and

a processor transmitting information as to whether the relay node transmits the second data to the user equipment, by using the first control information,

wherein the first control information and the second information are ACK information or HARQ NACK information.