Radio communication base station device, radio communication mobile station device, and control channel allocation method

摘要

Provided is a radio communication station device which can prevent limiting of resource allocation in a UE group. The radio communication device includes: a CCE allocation unit (104); modulation units (103-1 to 103-K); an arrangement unit (108); and a radio transmission unit (111). The CCE allocation unit (104) allocates allocation information allocated to a PDCCH which is inputted from the modulation unit (103-1 to 103-K) as follows. Among a plurality of search spaces shared by a greater number of UE groups as the CCE aggregation size of the PDCCH increases, a particular search space corresponding to the CCE aggregation size of the PDCCH and a mobile group (UE group) of the PDCCH is selected as a space to which the allocation information is to be allocated. The arrangement unit (108) arranges the allocation information in a downlink resource corresponding to the CCE of the particular search space allocated among the downlink resources secured for the PDCCH. The radio transmission unit (111) transmits an OFDM symbol having the allocation information from an antenna (112) to a mobile station.

主权项

1. A radio communication base station apparatus comprising:
processing circuitry configured to allocate a control channel to one or more control channel element(s) (CCE(s)) in a search space, which is comprised of a plurality of CCEs associated with an aggregation size of the one or more CCE(s) and a user equipment (UE) group, wherein:
a plurality of UEs are grouped into UE groups,the search space is a CCE field subject to blind decoding by each of the plurality of UEs,control channels for different UEs are allocated to different CCEs in the search space, andthe search space is shared by more of the UE groups when the aggregation size is larger; and a transmitter configured to transmit the allocated control channel.