Sidelink operation method of user equipment in wireless communication system, and user equipment using same

• US 10,499,375 B2
• Filed: 09/19/2016
• Issued: 12/03/2019
• Est. Priority Date: 09/16/2015
• 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): Clawson, Stephen J
• Application Number:
  US15/760,313
• Publication Number:
  US 20180263019A1
• Time in Patent Office: 1,170 Days
• Field of Search: 370329
• CPC Class Codes: H04W 48/02 Access restriction performed under specific conditions
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 76/23 Manipulation of direct-mode connections

Abstract

Provided are a sidelink operation method of a user equipment (UE) in a wireless communication system, and a UE that uses the method. The method comprises: transmitting a sidelink gap request to a serving cell; receiving, from the serving cell, a message for setting a plurality of sidelink gap patterns in response to the sidelink gap request; and receiving, from the serving cell, information for activating a predetermined sidelink gap pattern from among the plurality of sidelink gap patterns.

Claims

1. A method for performing sidelink operation of a user equipment (UE) in a wireless communication system, comprising:

transmitting a sidelink gap request to a serving cell;

receiving a message configuring a plurality of sidelink gap patterns as a response to the sidelink gap request from the serving cell; and

receiving information activating a specific sidelink gap pattern, among the plurality of sidelink gap patterns, from the serving cell,

wherein the sidelink gap request further includes a list indicating frequencies that require configuration of a sidelink gap.

2. The method of claim 1, wherein the sidelink gap request further includes information notifying a sidelink operation that is to be performed by the UE.

3. The method of claim 2, wherein the sidelink operation is related to one of sidelink signal reception and sidelink signal transmission.

4. The method of claim 1, wherein the sidelink gap request includes type information indicating a type of a sidelink gap,

wherein the type information indicates whether the sidelink gap is designated for a sidelink operation in an intra-frequency, whether the sidelink gap is designated for a sidelink operation in an inter-frequency, or whether the sidelink gap is designated for a sidelink operation in an intra-frequency and an inter-frequency.

5. The method of claim 1, wherein, when a command instructing acquisition of sidelink gap information related to a neighboring cell is received from the serving cell, sidelink gap information of the neighboring cell is acquired.

6. The method of claim 5, wherein the command configures a gap section for acquiring the sidelink gap information related to the neighboring cell.

7. The method of claim 5, wherein the sidelink gap information acquired from the neighboring cell is reported to the serving cell.

8. The method of claim 1, wherein the sidelink gap request is transmitted to the serving cell only in a case where capability information allowing the serving cell to configure a sidelink gap is received from the serving cell.

9. The method of claim 1, wherein, when transmitting the sidelink gap request, a prohibit timer is initiated.

10. The method of claim 9, wherein, while the prohibit timer is being operated, another sidelink gap request is not transmitted.

11. The method of claim 9, wherein, while the prohibit timer is being operated, another sidelink gap request is allowed to be transmitted only in a case where a change in the sidelink gap request occurs.

12. The method of claim 1, wherein a sidelink operation is performed in a subframe related to the specific sidelink gap pattern.

13. The method of claim 12, wherein a cellular operation with a serving cell being configured to the UE is limited in a subframe related to the specific sidelink gap pattern.

14. A user equipment, comprising:

a transmitter and a receiver for transmitting and receiving radio signals; and

a processor operatively coupled to the transmitter and the receiver,

wherein the processor is configured to;

transmit, via the transmitter, a sidelink gap request to a serving cell,

receive, via the receiver, a message configuring a plurality of sidelink gap patterns as a response to the sidelink gap request from the serving cell, and

receive, via the receiver, information activating a specific sidelink gap pattern, among the plurality of sidelink gap patterns, from the serving cell,

wherein the sidelink gap request further includes a list indicating frequencies that require configuration of a sidelink gap.