Repeater operation method and apparatus in wireless communication system

Patent metadata

Field	Value
Publication number	US-10298314-B2
Application number	US-201715819091-A
Country	US
Kind code	B2
Filing date	Nov 21, 2017
Priority date	Aug 18, 2013
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A method of supporting a user equipment (UE) to UE (UE-to-UE) communication by a network in a wireless communication system, the method includes transmitting a system information block associated with the UE-to-UE communication, wherein the system information block contains a period parameter indicating a periodicity at which a relay UE transmits discovery announcement, wherein the system information block contains a high threshold value and a low threshold value, wherein the relay UE is not allowed to transmit the discovery announcement if a reference signal received power (RSRP) measured by the relay UE is above the high threshold value, and wherein the relay UE is not allowed to transmit the discovery announcement if the RSRP measured by the relay UE is below the low threshold value.

First claim

What is claimed is:

1. A method of supporting a user equipment (UE) to UE (UE-to-UE) communication by a network in a wireless communication system, the method comprising:
transmitting a system information block related to the UE-to-UE communication,
wherein the system information block contains a period parameter for a periodicity at which a relay UE transmits a discovery announcement,
wherein the system information block contains a high threshold value and a low threshold value,
wherein the relay UE is not allowed to transmit the discovery announcement when a reference signal received power (RSRP) measured by the relay UE is above the high threshold value, and
wherein the relay UE is not allowed to transmit the discovery announcement when the RSRP measured by the relay UE is below the low threshold value.

2. The method according to claim 1 ,
wherein the relay UE is allowed to transmit the discovery announcement when the RSRP measured by the relay UE is in-between the high threshold value and the low threshold value.

3. The method according to claim 1 , further comprising:
transmitting a message to the relay UE to initiate the UE-to-UE communication.

4. The method according to claim 1 ,
wherein the system information block is transmitted through a broadcast message.

5. The method according to claim 1 ,
wherein when the period parameter is not included in the system information block, a default announcing period is used by the relay UE.

6. A method of supporting a user equipment (UE) to UE (UE-to-UE) communication by a UE operating as a relay UE in a wireless communication system, the method comprising:
receiving, by the UE, a system information block related to the UE-to-UE communication,
wherein the system information block contains a period parameter for a periodicity at which the UE transmits a discovery announcement,
wherein the system information block contains a high threshold value and a low threshold value,
wherein the UE is not allowed to transmit the discovery announcement when a reference signal received power (RSRP) measured by the UE is above the high threshold value, and
wherein the UE is not allowed to transmit the discovery announcement when the RSRP measured by the UE is below the low threshold value.

7. The method according to claim 6 , further comprising:
initiating the UE-to-UE communication, when the RSRP measured by the UE is in-between the high threshold value and the low threshold value.

8. The method according to claim 6 ,
wherein the system information block is received through a broadcast message.

9. The method according to claim 6 ,
wherein when the period parameter is not included in the system information block, the UE uses a default announcing period.

10. The method according to claim 6 ,
wherein the discovery announcement includes announcing a relay capability.

11. A method of supporting a user equipment (UE) to UE (UE-to-UE) communication by a network in a wireless communication system, the method comprising:
transmitting a system information block related to the UE-to-UE communication,
wherein the system information block contains a period parameter for a periodicity at which a relay UE transmits a discovery announcement announcing a relay capability,
wherein the system information block contains a high threshold value,
wherein the relay UE is allowed to transmit the discovery announcement when a reference signal received power (RSRP) measured by the relay UE is below the high threshold value, and
wherein the relay UE is not allowed to transmit the discovery announcement when the RSRP measured by the relay UE is above the high threshold value.

12. The method according to claim 11 ,
wherein the system information block further contains a low threshold value,
wherein the relay UE is allowed to transmit the discovery announcement when the RSRP measured by the relay UE is above the low threshold value, and
wherein the relay UE is not allowed to transmit the discovery announcement when the RSRP measured by the relay UE is below the low threshold value.

13. The method according to claim 11 , further comprising:
transmitting a message to the relay UE to initiate the UE-to-UE communication.

14. The method according to claim 11 ,
wherein the system information block is transmitted through a broadcast message.

15. The method according to claim 11 ,
wherein when the period parameter is not included in the system information block, a default announcing period is used by the relay UE.

16. A method of supporting a user equipment (UE) to UE (UE-to-UE) communication by a UE operating as a relay UE in a wireless communication system, the method comprising:
receiving, by the UE, a system information block related to the UE-to-UE communication,
wherein the system information block contains a period parameter for a periodicity at which the UE transmits a discovery announcement announcing a relay capability,
wherein the system information block contains a high threshold value,
wherein the UE is allowed to transmit the discovery announcement when a reference signal received power (RSRP) measured by the UE is below the high threshold value, and
wherein the UE is not allowed to transmit the discovery announcement when the RSRP measured by the UE is above the high threshold value.

17. The method according to claim 16 ,
wherein the system information block further contains a low threshold value,
wherein the UE is allowed to transmit the discovery announcement when the RSRP measured by the UE is above the low threshold value, and
wherein the UE is not allowed to transmit the discovery announcement when the RSRP measured by the UE is below the low threshold value.

18. The method according to claim 17 , further comprising:
initiating the UE-to-UE communication, when the RSRP measured by the UE is in-between the high threshold value and the low threshold value.

19. The method according to claim 16 ,
wherein the system information block is received through a broadcast message.

20. The method according to claim 16 ,
wherein when the period parameter is not included in the system information block, the UE uses a default announcing period.

Assignees

• Lg Electronics Inc

Inventors

• Ryu Jinsook
• Kim Laeyoung
• Kim Hyunsook
• Kim Jaehyun
• Kim Taehun
• Kim Taehyeon

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/51

  based on terminal or device properties · CPC title

• H04W84/047

  using dedicated repeater stations · CPC title

• H04B7/15507 Primary

  Relay station based processing for cell extension or control of coverage area, (network planning with network coordinated processing with regard to cell extension H04W16/26; network topologies using dedicated repeater stations H04W84/047; terminal devices adapted for relaying to or from an other terminal H04W88/04) · CPC title

• H04W64/006

  with additional information processing, e.g. for direction or speed determination · CPC title