METHOD FOR DEVICE-TO-DEVICE (D2D) OPERATION PERFORMED BY TERMINAL IN WIRELESS COMMUNICATION SYSTEM, AND TERMINAL USING THE METHOD

• US 20180249455A1
• Filed: 08/17/2016
• Published: 08/30/2018
• Est. Priority Date: 08/17/2015
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jung, Sunghoon, Lee, Jaewook
• Granted Patent: US 10,499,400 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 68/005 Transmission of information for alerting of incoming communication
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 76/23 Manipulation of direct-mode connections

Abstract

Provided are a D2D operation method performed by a terminal in a wireless communication system and a terminal using the method. The method is characterized by obtaining a D2D setting for a cell in a non-serving frequency, and determining the validity of the D2D setting. The D2D setting can be obtained by the terminal from the cell in the non-serving frequency or from a serving cell of the terminal.

Claims

1. A method for D2D (Device-to-Device) operation performed by a UE in a wireless communication system, comprising:

obtaining a D2D configuration for a cell in a non-serving frequency; and

determining validity of the D2D configuration.

2. The method of claim 1, wherein a paging message is received from the cell of the non-serving frequency, and

if the paging message notifies of a change of the D2D configuration of the cell, the D2D configuration is obtained from the cell.

3. The method of claim 2, wherein the obtained D2D configuration for the cell is reported to a serving cell of the UE.

4. The method of claim 3, wherein a serving frequency at which the serving cell operates and the non-serving frequency are different from each other.

5. The method of claim 1, wherein system information including the D2D configuration is received from the cell of the non-serving frequency,

a change of the D2D configuration is determined by comparing the D2D configuration with a previous D2D configuration, and

if the D2D configuration has been changed from the previous D2D configuration, the change of the D2D configuration is reported to a serving cell of the UE.

6. The method of claim 5, wherein a message requesting acquisition and reporting of the D2D configuration is received from the serving cell.

7. The method of claim 6, wherein the D2D configuration is reported in response to the requesting message.

8. The method of claim 1, wherein the D2D configuration for the cell of the non-serving frequency is received from a serving cell of a serving frequency.

9. The method of claim 8, wherein the D2D configuration further receives time information representing a time period during which the D2D configuration is valid.

10. The method of claim 9, wherein, if the valid time period is passed, the D2D configuration is discarded.

11. The method of claim 9, wherein, if the valid time period is passed, a new D2D configuration is requested from the serving cell.

12. The method of claim 8, wherein the D2D configuration further comprises information representing ID (identity) of the cell operating at the non-serving frequency to which the D2D configuration is applied.

13. A user equipment (UE), comprising:

a Radio Frequency (RF) unit transmitting and receiving a radio signal; and

a processor operating being coupled with the RF unit, wherein the processor is configured to;

obtain a D2D configuration for a cell in a non-serving frequency; and

determine validity of the D2D configuration.