FIELD: radio engineering and communication.
SUBSTANCE: invention relates to a user device and a base station in a radio communication system. User device communicates with a base station and comprises a receiving module, configured to receive, from a base station, a downlink signal contained in a search space which is a group of probable physical downlink control channels (PDCCH), a control module configured to monitor to obtain a probable PDCCH addressed to a given user device, based on an allowable period specified for said search space, and a communication module configured to receive a physical downlink shared channel (PDSCH) and transmitting an uplink signal to a base station based on information contained in said probable PDCCH addressed to said user device.
EFFECT: efficient consumption of resources when tracking a single search space.
5 cl, 6 dwg
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