Method and apparatus for transmitting indication for D2D operation in wireless communication system

• US 9,807,811 B2
• Filed: 10/02/2014
• Issued: 10/31/2017
• Est. Priority Date: 10/03/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jung, Sunghoon, Lee, Youngdae
• Primary Examiner(s): MIZRAHI, DIANE D
• Application Number:
  US15/026,535
• Publication Number:
  US 20160242221A1
• Time in Patent Office: 1,125 Days
• Field of Search: None
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals

Abstract

A method and apparatus for transmitting an indication for a device-to-device (D2D) operation in a wireless communication system is provided. A user equipment (UE) transmits an indication indicating that the UE is interested to perform a D2D operation. The D2D operation may include reception/transmission of a D2D discovery signal/D2D communication data.

Claims

1. A method for transmitting, by a user equipment (UE), an indication for a device-to-device (D2D) operation in a wireless communication system, the method comprising:

transmitting, by the UE, an indication indicating that the UE is interested to perform the D2D operation to a network;

receiving, by the UE, D2D radio resources, which are allocated based on the indication, from the network; and

performing, by the UE, the D2D operation by using the D2D radio resources.

2. The method of claim 1, wherein the D2D operation includes reception of a D2D discovery signal.

3. The method of claim 1, wherein the D2D operation includes transmission of a D2D discovery signal.

4. The method of claim 1, wherein the D2D operation includes reception of a D2D communication data.

5. The method of claim 1, wherein the D2D operation includes transmission of a D2D communication data.

6. The method of claim 1, wherein the indication further indicates that the UE was performing the D2D operation before establishing a radio resource control (RRC) connection.

7. The method of claim 1, wherein the indication is transmitted via a radio resource control (RRC) message after an RRC connection establishment procedure is completed.

8. The method of claim 1, wherein the indication is transmitted during a radio resource control (RRC) connection establishment procedure.

9. The method of claim 8, wherein the indication is transmitted via an RRC connection request message or an RRC connection setup complete message during the RRC connection establishment procedure.

10. A user equipment (UE) in a wireless communication system, the UE comprising:

a radio frequency (RF) unit configured to transmit or receive a radio signal; and

a processor coupled to the RF unit, and configured to;

control the RF unit to transmit an indication indicating that the UE is interested to perform a device-to-device (D2D) operation to a network,

control the RF unit to receive D2D radio resources, which are allocated based on the indication, from the network; and

control the RF unit to perform the D2D operation by using the D2D radio resources.

11. The UE of claim 10, wherein the D2D operation includes reception or transmission of a D2D discovery signal.

12. The UE of claim 10, wherein the D2D operation includes reception or transmission of a D2D communication data.

13. The UE of claim 10, wherein the indication is transmitted via a radio resource control (RRC) message after an RRC connection establishment procedure is completed.

14. The UE of claim 10, wherein the indication is transmitted during a radio resource control (RRC) connection establishment procedure.