METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SIGNALS FOR DEVICE-TO-DEVICE COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM

• US 20150195824A1
• Filed: 06/05/2013
• Published: 07/09/2015
• Est. Priority Date: 06/25/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, Hyeyoung, Chung, Jaehoon, Lee, Eunjung
• Granted Patent: US 9,497,738 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 28/0221 power availability or consumption
• CPC Class Codes: H04W 72/1273 of downlink data flows
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 92/18 between terminal devices

Abstract

The present invention relates to a method for transmitting and receiving signals in a wireless communication system, where a second terminal transmits and receives a signal to and from a first terminal for device-to-device communication. The method includes the steps of: receiving a first signal from a first terminal; measuring a channel using the first signal and transmitting channel state information to a third terminal; and receiving control information from the third terminal in response to the transmission of the channel state information, wherein the channel state information pertains to a communication link between the first and second terminals.

Claims

1. A method for transmitting and receiving a signal for Device to Device (D2D) communication with a first terminal by a second terminal in a wireless communication system, the method comprising:

receiving a first signal from the first terminal;

measuring a channel using the first signal and transmitting channel state information to a third terminal; and

receiving control information from the third terminal in response to the transmitted channel state information,

wherein the channel state information is about a communication link between the first terminal and the second terminal.

2. The method according to claim 1, wherein the reception of a first signal comprises receiving the first signal in a resource area indicated by information indicating the communication link between the first terminal and the second terminal.

3. The method according to claim 1, wherein the channel state information includes a scheduling request for a communication link to the first terminal.

4. The method according to claim 3, wherein the scheduling request includes information about a service type and information indicating the communication link between the first terminal and the second terminal.

5. The method according to claim 1, wherein the channel state information includes information indicating the communication link between the first terminal and the second terminal.

6. The method according to claim 1, wherein the channel state information is transmitted via a resource area indicated by information indicating the communication link between the first terminal and the second terminal.

7. The method according to claim 1, wherein the channel state information is transmitted via a resource area indicated by an index of resources in which the first signal is received.

8. The method according to claim 1, wherein if the channel state information includes a scheduling request for a communication link to the first terminal, the control information includes a grant for the scheduling request.

9. The method according to claim 8, wherein the control information includes information about a Modulation and Coding Scheme (MCS) used for the communication link between the first terminal and the second terminal.

10. The method according to claim 1, wherein the second terminal attempts to receive the control information after a predetermined subframe from a subframe in which the channel state information is transmitted.

11. The method according to claim 1, wherein the first terminal is a source station, the second terminal is a destination station, the third terminal is a coordination station, and the first signal is a pilot signal.

12. The method according to claim 1, wherein the first terminal is a destination station, the second terminal is a source station, the third terminal is a coordination station, and the first signal is a sounding signal.

13. A second terminal for performing Device to Device (D2D) communication in a wireless communication system, the second terminal comprising:

a transmission module; and

a processor,

wherein the processor is configured to measure a channel using a first signal received from a first terminal, to transmit channel state information to a third terminal, and to receive control information from the third terminal in response to the transmitted channel state information, and the channel state information is about a communication link between the first terminal and the second terminal.