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

• US 20170048038A1
• Filed: 04/30/2015
• Published: 02/16/2017
• Est. Priority Date: 04/30/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: SEO, Hanbyul, YANG, Suckchel, LEE, Seungmin
• Granted Patent: US 10,128,996 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04L 27/261 Details of reference signals
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0082 at predetermined intervals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 56/002 Mutual synchronization
• CPC Class Codes: H04W 56/0045 compensating for timing error by altering transmission time
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/40 Resource management for direct mode communication, e.g. D2D or sidelink
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 92/18 between terminal devices

Abstract

The present invention provides a method for transmitting a device-to-device (D2D) signal and an apparatus for the same, which are used in a wireless access system supporting D2D communication. According to one aspect of the present invention, the method for transmitting a D2D signal by a terminal comprises the steps of: receiving, from a base station, sounding reference signal configuration information instructing an uplink subframe to transmit a sounding reference signal; and determining whether to transmit the D2D signal in a D2D subframe set in a specific subframe when the specific subframe is included in the sounding reference signal configuration information.

Claims

1-14. -14. (canceled)

15. A method for performing, by a user equipment (UE), a Device-to-Device (D2D) communication in a wireless communication system, the method comprising:

receiving Sounding Reference Signal (SRS) configuration information; and

transmitting a SRS in an uplink subframe according to the SRS configuration information,

wherein, when a subframe having a subframe number same as the uplink subframe is configured a D2D subframe, a D2D signal is not transmitted in the D2D subframe.

16. The method according to claim 15, further comprising:

determining whether the D2D signal is transmitted or not, considering a timing advance command of the D2D subframe and a cyclic prefix configured for the D2D subframe.

17. The method according to claim 16,

wherein the UE determines to transmit the D2D signal in the D2D subframe, when the timing advance command of the D2D subframe is applied.

18. The method according to claim 16,

wherein the UE determines not to transmit the D2D signal in the D2D subframe, when the timing advance command of the D2D subframe is not applied.

19. The method according to claim 16,

wherein the UE determines to transmit the D2D signal in the D2D subframe, when the cyclic prefix configured for the D2D subframe has same length with a cyclic prefix configured for the uplink subframe.

20. The method according to claim 16,

wherein the UE determines not to transmit the D2D signal in the D2D subframe, when the cyclic prefix configured for the D2D subframe has different length from a cyclic prefix configured for the uplink subframe.

21. A User Equipment (UE) for performing a Device-to-Device (D2D) communication in a wireless communication system, the UE comprising:

a Radio Frequency (RF) module; and

a processor operably coupled with the RF module and configured to;

receive Sounding Reference Signal (SRS) configuration information; and

transmit a SRS in an uplink subframe according to the SRS configuration information,

wherein, when a subframe having a subframe number same as the uplink subframe is configured a D2D subframe, a D2D signal is not transmitted in the D2D subframe.

22. The UE according to claim 21, wherein the processor is further configured to:

determine whether the D2D signal is transmitted or not, considering a timing advance command of the D2D subframe and a cyclic prefix configured for the D2D subframe.

23. The UE according to claim 22,

wherein the processor determines to transmit the D2D signal in the D2D subframe, when the timing advance command of the D2D subframe is applied.

24. The UE according to claim 22,

wherein the processor determines not to transmit the D2D signal in the D2D subframe, when the timing advance command of the D2D subframe is not applied.

25. The UE according to claim 22,

wherein the processor determines to transmit the D2D signal in the D2D subframe, when the cyclic prefix configured for the D2D subframe has same length with a cyclic prefix configured for the uplink subframe.

26. The UE according to claim 22,

wherein the processor determines not to transmit the D2D signal in the D2D subframe, when the cyclic prefix configured for the D2D subframe has different length from a cyclic prefix configured for the uplink subframe.