WIRELESS COMMUNICATIONS METHOD, WIRELESS COMMUNICATIONS SYSTEM, AND WIRELESS BASE STATION

摘要

In order to appropriately allocate radio resources to downlink control information, in the enhanced downlink control channel, the present invention provides a radio communication method in a radio communication system in which a radio base station transmits downlink control information to each user terminal via an enhanced downlink control channel that is frequency division multiplexed with a downlink shared data channel, the radio communication method comprising the steps of: by the radio base station, generating the downlink control information in eCCE unit, the eCCE being made up with a plurality of eREGs; and mapping the downlink control information in eREG unit to a plurality of resource regions for the enhanced downlink control channel. Each eREG is made up with a plurality of REs, and the radio base station performs mapping to each of the resource regions in such a manner that the enhanced resource element groups (eREGs) are uniform in number of resource elements (REs) and the REs that make up 1 eREG are distributed to a plurality of OFDM symbols.