Method whereby user equipment transmits UE capability information in wireless communication system, and device therefor

• US 10,462,800 B2
• Filed: 01/12/2016
• Issued: 10/29/2019
• Est. Priority Date: 01/12/2015
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Seungmin, Yang, Suckchel, Ahn, Joonkui, Kim, Seonwook
• Primary Examiner(s): Ho, Duc C
• Application Number:
  US15/541,692
• Publication Number:
  US 20180020443A1
• Time in Patent Office: 1,386 Days
• CPC Class Codes: H04J 11/0073 Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/0038 Blind format detection for detection of modulation format H04L27/0012
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0046 Code rate detection or code type detection H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 36/0079 in case of hand-off failure or rejection
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 36/305 Handover due to radio link failure control signalling for hand-off failure H04W36/0079
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 48/12 : using downlink control channel
• CPC Class Codes: H04W 48/16 : Discovering, processing access restriction or access information
• CPC Class Codes: H04W 72/21 : in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/542 : using measured or perceived quality
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states

Abstract

Provided are a method whereby user equipment (UE) transmits capability information in a wireless communication system and UE using the method. The method comprises: generating UE capability information indicating the capability of the UE; and transmitting the UE capability information to a base station, wherein the UE capability information includes blind decoding (BD) capability information indicating the number of times the UE can perform BD on a downlink control channel in one subframe.

Claims

1. A method for monitoring downlink control information (DCI) in a wireless communication system by a user equipment (UE), the method comprising:

receiving the DCI in one or more resource blocks; and

monitoring a plurality of physical downlink control channel (PDCCH) candidates to detect the DCI in the one or more resource blocks based on an aggregation level of a serving cell,

wherein, when PDCCH candidate information related to PDCCH candidate reduction is configured to the UE, the UE monitors PDCCH candidates based on the PDCCH candidate information among the plurality of PDCCH candidates.

2. The method of claim 1, wherein the PDCCH candidate information indicates a number of PDCCH candidates being less than or equal to the plurality of PDCCH candidates.

3. The method of claim 1,

wherein the plurality of PDCCH candidates have corresponding PDCCH candidate index numbers, and

wherein, when the PDCCH candidate information related to PDCCH candidate reduction is configured to the UE, the UE monitors a set of PDCCH candidates having lowest consecutive PDCCH index values.

4. The method of claim 1, further comprising:

receiving the PDCCH candidate information.

5. The method of claim 1, wherein, when the PDCCH candidate information is not configured to the UE, the monitoring includes attempting to decode all of the plurality of PDCCH candidates in order to detect the DCI.

6. The method of claim 1, further comprising:

detecting the DCI upon successfully decoding at least one of the number of the plurality of PDCCH candidates; and

receiving data based on the detected DCI.

7. The method of claim 1, wherein the PDCCH candidate information is a UE-specific PDCCH candidate information.

8. The method of claim 1, wherein the PDCCH candidate information comprises 2 bits.

9. The method of claim 1, wherein the PDCCH candidate information informs one value among values 0, 0.33, 0.66, and 1.

10. The method of claim 1, wherein the PDCCH candidate information is received through a higher layer signal.

11. The method of claim 1, wherein the higher layer signal is a radio resource control (RRC) message.

12. The method of claim 1, wherein the UE supports aggregation of more than 5 cells.

13. A user equipment (UE) for monitoring downlink control information (DCI) in a wireless communication system, the UE comprising:

a transceiver; and

a processor operatively connected to the transceiver and configured to;

receive the DCI in one or more resource blocks; and

monitor a plurality of physical downlink control channel (PDCCH) candidates to detect the DCI in the one or more resource blocks based on an aggregation level of a serving cell,

wherein, when PDCCH candidate information related to PDCCH candidate reduction is configured to the UE, the UE monitors PDCCH candidates based on the PDCCH candidate information among the plurality of PDCCH candidates.

14. The UE of claim 13, wherein the PDCCH candidate information informs a number of PDCCH candidates being less than or equal to the plurality of PDCCH candidates.

15. The UE of claim 13,

wherein the plurality of PDCCH candidates have corresponding PDCCH candidate index numbers, and

wherein, when the PDCCH candidate information related to PDCCH candidate reduction is configured to the UE, the UE monitors a set of PDCCH candidates having lowest consecutive PDCCH index values.

16. The UE of claim 13, the processor is further configured to receive the PDCCH candidate information.

17. The UE of claim 13, wherein, when the PDCCH candidate information is not configured to the UE, the monitoring includes attempting to decode all of the plurality of PDCCH candidates in order to detect the DCI.

18. The UE of claim 13, the processor is further configured to:

detect the DCI upon successfully decoding at least one of the number of the plurality of PDCCH candidates; and

receive data based on the detected DCI.

19. The UE of claim 13, wherein the PDCCH candidate information is a UE-specific PDCCH candidate information.

20. The UE of claim 13, wherein the PDCCH candidate information comprises 2 bits.

21. The UE of claim 13, wherein the PDCCH candidate information informs one value among values 0, 0.33, 0.66, and 1.

22. The UE of claim 13, wherein the PDCCH candidate information is received through a higher layer signal.

23. The UE of claim 13, wherein the higher layer signal is a radio resource control (RRC) message.

24. The UE of claim 13, wherein the UE supports aggregation of more than 5 cells.