METHOD FOR TRANSMITTING DISCOVERY SIGNAL FOR DEVICE-TO-DEVICE COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR

• US 20150382389A1
• Filed: 02/18/2014
• Published: 12/31/2015
• Est. Priority Date: 02/26/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: SEO, Hanbyul
• Granted Patent: US 9,769,859 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method for performing device-to-device (D2D) communication by a user equipment in a wireless communication system is disclosed in the present application. More particularly, the method comprises the steps of: receiving a discovery signal from a counterpart user equipment (UE); identifying at least one of information indicating whether the counterpart UE is located within the coverage area of a base station and information indicating whether the counterpart UE is in a connected mode or in an idle mode, all of which are included in the discovery signal; and performing the D2D communication with the counterpart UE by using the at least one identified pierce of information.

Claims

1-10. -10. (canceled)

11. A method for transceiving signals via a Device-to-Device (D2D) link at a user equipment (UE) in a wireless communication system, the method comprising;

transmitting information for communicating with another UE on a first channel via the D2D link; and

transmitting and receiving the signals on a second channel via the D2D link using the information,

wherein the information for communicating with another user equipment includes an indicator indicating whether the UE is located within a coverage of a base station or not.

12. The method of claim 11, wherein, if a Time Division Duplex (TDD) mode is applied to the UE, the information for communicating with another user equipment further includes information indicating an uplink/downlink (UL/DL) subframe configuration which is applied to a serving cell of the UE.

13. The method of claim 11, wherein the second channel is a D2D data channel.

14. The method of claim 11, wherein the information for communicating with another UE is transmitted before transmitting and receiving the signals.

15. The method of claim 11, wherein the information for communicating with another user equipment further includes information indicating whether a duplex mode applied to the UE is a Frequency Division Duplex (FDD) mode or a Time Division Duplex (TDD) mode.

16. A method for transceiving signals via a Device-to-Device (D2D) link at a user equipment (UE) in a wireless communication system, the method comprising;

receiving information for communicating with another UE on a first channel via the D2D link; and

receiving and transmitting the signals on a second channel via the D2D link using the information,

wherein the information for communicating with another user equipment includes an indicator indicating whether the another UE is located within a coverage of a base station or not.

17. The method of claim 16, wherein, if a Time Division Duplex (TDD) mode is applied to the another UE, the information for communicating with another user equipment further includes information indicating an uplink/downlink (UL/DL) subframe configuration which is applied to a serving cell of the another UE.

18. The method of claim 16, wherein the second channel is a D2D data channel.

19. The method of claim 16, wherein the information for communicating with another UE is received before receiving and transmitting the signals.

20. The method of claim 16, wherein the information for communicating with another user equipment further includes information indicating whether a duplex mode applied to the another UE is a Frequency Division Duplex (FDD) mode or a Time Division Duplex (TDD) mode.