US Patent No. 10,142,977

METHOD FOR RECEIVING DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM APPLYING CARRIER AGGREGATION TECHNIQUE, AND APPARATUS THEREFOR


Patent No. 10,142,977
Issue Date November 27, 2018
Title Method For Receiving Downlink Control Channel In Wireless Communication System Applying Carrier Aggregation Technique, And Apparatus Therefor
Inventorship Seungmin Lee, Seoul (KR)
Joonkui Ahn, Seoul (KR)
Yunjung Yi, Seoul (KR)
Inkwon Seo, Seoul (KR)
Assignee LG ELECTRONICS INC., Seoul (KR)

Claim of US Patent No. 10,142,977

1. A method of detecting a downlink control channel by a user equipment in DRX (discontinuous reception) mode in a carrier aggregation applied wireless communication system, comprising:configuring downlink control channel detection subframes in a secondary cell based on a specific uplink/downlink subframe configuration for a TDD (time division duplex) primary cell;
detecting the downlink control channel from the downlink control channel detection subframes when a preset DRX related timer defined by a subframe number unit is operating; and
receiving a downlink data channel based on the detected downlink control channel,
wherein the downlink control channel detection subframes comprise subframes on the secondary cell matching locations of downlink subframes on the specific uplink/downlink subframe configuration or locations of special subframes including a downlink resource over a preset length,
wherein the specific uplink/downlink subframe configuration is an SIB1 (system information block1) uplink/downlink subframe configuration if a detection of information on an uplink/downlink subframe configuration is not successful, and
wherein the specific uplink/downlink subframe configuration is a detected uplink/downlink subframe configuration if the detection of the information on the uplink/downlink subframe configuration is successful.