Aggregation of resources in improved control channels

摘要

A method for receiving downlink control information in a radio communication system, comprising, for a first subframe in which a plurality of non-overlapping subsets of resource elements in at least one time resource block must be added -frequency for a transmission received from first downlink control information: determine (2810) members of a first set of aggregation levels usable to aggregate non-overlapping subsets of resource elements for the transmission received from the first control information of downlink, wherein said determination is based on a level of perforation to be used for the transmission received from the first downlink control information; and wherein said determination comprises determining that a set of aggregation levels can be used when the perforation level is below a threshold, and determining that a different set of aggregation levels can be used when the perforation level is above or is equal to the threshold, the different set comprising an aggregation level that is higher than all the aggregation levels in the set; and receiving (2820) the first downlink control information by unmapping the first downlink control information from one or more first non-overlapping subsets of resource elements in the at least one time-frequency resource block, according to an aggregation level selected from the first set determined.