Method for monitoring downlink control information wireless communication system, and device therefor

• US 10,674,519 B2
• Filed: 01/12/2016
• Issued: 06/02/2020
• 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): Ng, Christine
• Application Number:
  US15/542,369
• Publication Number:
  US 20170374569A1
• Time in Patent Office: 1,603 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 for monitoring downlink control information by user equipment in a wireless communication system and user equipment using the method. The method comprises: receiving “control channel candidate number information” indicating the number of control channel candidates for each aggregation level (AL) of a search space (SS) per cell; and in order to detect DCI, monitoring some initial control channel candidates among existing control channel candidates (legacy candidates), wherein the number of the initial control channel candidates is determined based on the control channel candidate number information.

Claims

1. A method for transmitting capability information in a wireless communication system, the method performed by a user equipment (UE) and comprising:

generating UE capability information informing a capability of the UE; and

transmitting the UE capability information to a base station (BS),

wherein whether the UE capability information includes blind decoding (BD) information informing a maximum number of blind decodes in one subframe supported by the UE is dependent on a number of component carriers supported by the UE,

wherein, based on the UE supporting a carrier aggregation with more than 5 component carriers, the UE capability information includes the BD information, and

wherein, based on the UE supporting a carrier aggregation with up to 5 component carriers, the UE capability information does not include the BD information.

2. The method of claim 1, further comprising:

receiving a resource block and decoding information for decoding at least a portion of the resource block, the decoding information corresponding to the UE capability information.

3. The method of claim 1, wherein the BD information informs the maximum number of blind decodes in a UE-specific search space (USS) in the one subframe.

4. The method of claim 1, wherein the UE capability information is transmitted through a radio resource control (RRC) message.

5. The method of claim 1, wherein a maximum number of blind decodes in one subframe of a component carrier supported by the UE is smaller than or equal to 32.

6. A user equipment (UE) configured to transmit capability information in a wireless communication system, the UE comprising:

a transceiver; and

a processor operatively connected to the transceiver and configured to;

generate UE capability information informing a capability of the UE; and

transmit the UE capability information to a base station (BS),

wherein whether the UE capability information includes blind decoding (BD) information informing a maximum number of blind decodes in one subframe supported by the UE is dependent on a number of component carriers supported by the UE,

wherein, based on the UE supporting a carrier aggregation with more than 5 component carriers, the UE capability information includes the BD information, and

wherein, based on the UE supporting a carrier aggregation with up to 5 component carriers, the UE capability information does not include the BD information.

7. The UE of claim 6, wherein the processor is further configured to receive a resource block and decoding information for decoding at least a portion of the resource block, the decoding information corresponding to the UE capability information.

8. The UE of claim 6, wherein the BD information informs the maximum number of blind decodes in a UE-specific search space (USS) in the one subframe.

9. The UE of claim 6, wherein the UE capability information is transmitted through a radio resource control (RRC) message.

10. The UE of claim 6, wherein a maximum number of blind decodes in one subframe of a component carrier supported by the UE is smaller than or equal to 32.