Method for device-to-device (D2D) operation performed by terminal in wireless communication system, and terminal using the method

• US 10,499,400 B2
• Filed: 08/17/2016
• Issued: 12/03/2019
• 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
• Primary Examiner(s): Roberts, Brian S
• Assistant Examiner(s): Decker, Cassandra L
• Application Number:
  US15/752,860
• Publication Number:
  US 20180249455A1
• Time in Patent Office: 1,203 Days
• Field of Search: None
• 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 user equipment (UE) in a wireless communication system, comprising:

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

determining validity of the D2D configuration,

wherein system information including the D2D configuration is received from the cell of the non-serving frequency,

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

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

2. The method of claim 1 further comprising:

receiving a paging message from the cell in the non-serving frequency, wherein the D2D configuration is received from the cell in the non-serving frequency when the paging message notifies the UE of a change of the D2D configuration of the cell in the non-serving frequency.

3. The method of claim 2, wherein the received D2D configuration for the cell in the non-serving frequency is reported to the 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 further comprising:

receiving a message requesting acquisition and reporting of the D2D configuration from the serving cell.

6. The method of claim 5 further comprising:

reporting the D2D configuration in response to the message requesting acquisition and reporting.

7. The method of claim 1, wherein the D2D configuration includes time information representing a time period during which the D2D configuration is valid.

8. The method of claim 7 further comprising:

discarding the D2D configuration when the time period expires.

9. The method of claim 7 further comprising:

requesting a new D2D configuration from the serving cell when the time period expires.

10. The method of claim 1, wherein the D2D configuration further comprises information representing an identity (ID) of the cell operating at the non-serving frequency to which the D2D configuration is applied.

11. A user equipment (UE), comprising:

a transmitter and receiver; and

a processor coupled with the transmitter and receiver, wherein the processor is configured to;

controlling the receiver to receive a D2D configuration for a cell in a non-serving frequency; and

determine validity of the D2D configuration,

wherein system information including the D2D configuration is received from the cell of the non-serving frequency,

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

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