Radio communication device, radio communication method, and radio communication system

摘要

The invention operates as a base station and preferably suppresses interference between cells in a downlink to a terminal in a range expansion area, under a radio communication environment in which cells in different sizes are layered. PDCCH parts which are respectively used by a Macro eNodeB and a Pico eNodeB are separated by a search space so that all information in the PDCCH can be protected from losing due to interference. Since a user equipment can maintain a control signal in the PDSCH part, a signal in the PDSCH can be output from an eNodeB and this improves the throughput.

主权项

1. A radio communication device comprising circuitry configured to place control information included in a beginning of a downlink subframe, which is transmitted from the radio communication device as a base station, in a frequency band separated from the control information of downlink subframe transmitted from an adjacent base station as synchronizing,
wherein the control information is placed in a band including a predetermined position in an event common control information which is specified to be sequentially placed from the predetermined position and addressed to all terminals in a cell of the radio communication device is included, and the control information is placed in a band which does not include the predetermined position in an event the common control information is not included.