Method for monitoring physical downlink control channel of terminal in wireless communication system, and device using same method

Patent metadata

Field	Value
Publication number	US-11503547-B2
Application number	US-202217648535-A
Country	US
Kind code	B2
Filing date	Jan 20, 2022
Priority date	Jul 26, 2019
Publication date	Nov 15, 2022
Grant date	Nov 15, 2022

Abstract

Provided are a method and device for monitoring a downlink control channel of a terminal in a wireless communication system. The terminal receives configuration information which informs of the position of an SSB or configuration information which informs of the position of an LTE CRS, and receives configuration information which informs of a monitoring occasion for detecting a wake up signal (WUS). If first PDCCH monitoring for detecting the wake up signal is not required since a resource of the monitoring occasion overlaps with a resource of the SSB and/or a resource of the LTE CRS, the terminal performs second PDCCH monitoring in a next discontinuous reception (DRX)-on duration.

First claim

What is claimed is:

1. A method of monitoring a physical downlink control channel (PDCCH) by a user equipment (UE), the method comprising:
receiving first configuration information informing of a position of a synchronization signal/physical broadcast channel block (SSB);
receiving second configuration information informing of a monitoring occasion for detecting a wake up signal (WUS), wherein the WUS informs of whether the UE wakes up in a next discontinuous reception (DRX)-on duration; and
based on that a first PDCCH monitoring for detecting the WUS is not required as a resource of the monitoring occasion overlaps a resource of the SSB, performing a second PDCCH monitoring for detecting control information other than the WUS in the next DRX on duration.

2. The method of claim 1 , wherein the first configuration information is received through a radio resource control (RRC) message.

3. The method of claim 1 , wherein based on even one of resource elements for the monitoring occasion overlapping resource elements of the SSB, the first PDCCH monitoring is not required in the monitoring occasion.

4. The method of claim 1 , wherein the wake-up signal is first downlink control information (DCI) including a wake-up indication.

5. The method of claim 4 , wherein the second PDCCH monitoring is for detecting second DCI other than the first DCI.

6. The method of claim 1 , wherein the monitoring occasion is positioned within a predetermined time from a start time of the next DRX-on duration.

7. The method of claim 1 , wherein based on the first PDCCH monitoring for detecting the WUS not being required in the monitoring occasion, the first PDCCH monitoring is not performed in the monitoring occasion.

8. The method of claim 1 , wherein, when the monitoring occasion is a plurality of monitoring occasions, based on the first PDCCH monitoring not being required in each of the plurality of monitoring occasions, the second PDCCH monitoring is performed in the next DRX-on duration.

9. The method of claim 1 , further comprising:
receiving third configuration information informing of a long term evolution (LTE) cell-specific reference signal (CRS) resource.

10. The method of claim 9 , wherein based on even one of resource elements for the monitoring occasion overlaps resource elements of the LTE CRS, the first PDCCH monitoring is not required in the monitoring occasion.

11. A user equipment (UE) comprising:
a transceiver; and
a processor connected to the transceiver,
wherein the processor is configured to:
receive first configuration information informing of a position of a synchronization signal/physical broadcast channel block (SSB);
receive second configuration information informing of a monitoring occasion for detecting a wake up signal (WUS), wherein the WUS informs of whether the UE wakes up in a next discontinuous reception (DRX)-on duration; and
based on that a first PDCCH monitoring for detecting the WUS is not required as a resource of the monitoring occasion overlaps a resource of the SSB, perform a second PDCCH monitoring for detecting control information other than the WUS in the next DRX on duration.

12. The UE of claim 11 , wherein based on even one of resource elements for the monitoring occasion overlapping resource elements of the SSB, the first PDCCH monitoring is not required in the monitoring occasion.

13. The UE of claim 11 , wherein the wake-up signal is first downlink control information (DCI) including a wake-up indication.

14. The UE of claim 13 , wherein the second PDCCH monitoring is for detecting second DCI other than the first DCI.

15. The UE of claim 11 , wherein the monitoring occasion is positioned within a predetermined time from a start time of the next DRX-on duration.

16. The UE of claim 11 , wherein based on the first PDCCH monitoring for detecting the WUS not being required in the monitoring occasion, the first PDCCH monitoring is not performed in the monitoring occasion.

17. The UE of claim 11 , wherein, when the monitoring occasion is a plurality of monitoring occasions, based on the first PDCCH monitoring not being required in each of the plurality of monitoring occasions, the second PDCCH monitoring is performed in the next DRX-on duration.

18. The UE of claim 11 , further comprising:
receiving third configuration information informing of a long term evolution (LTE) cell-specific reference signal (CRS) resource.

19. The UE of claim 18 , wherein based on even one of resource elements for the monitoring occasion overlaps resource elements of the LTE CRS, the first PDCCH monitoring is not required in the monitoring occasion.

20. An apparatus operated in a wireless communication system, the apparatus comprising:
a processor; and
a memory to be operatively connected to the processor,
wherein the processor is configured to:
receive first configuration information informing of a position of a synchronization signal/physical broadcast channel block (SSB);
receive second configuration information informing of a monitoring occasion for detecting a wake up signal (WUS), wherein the WUS informs of whether the UE wakes up in a next discontinuous reception (DRX)-on duration; and
based on that a first PDCCH monitoring for detecting the WUS is not required as a resource of the monitoring occasion overlaps a resource of the SSB, perform a second PDCCH monitoring for detecting control information other than the WUS in the next DRX on duration.

Assignees

• Lg Electronics Inc

Inventors

• Seo Inkwon
• Ahn Joonkui
• Park Changhwan

Classifications

• H04W72/23

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

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W52/0274

  by switching on or off the equipment or parts thereof · CPC title

• Y02D30/70

  in wireless communication networks · CPC title