Patent ID: 8891469
Filing Date: 2014-11-18
Classification: H04B,H04L,H04W

Abstract:
1. A radio transmitting apparatus that transmits a control signal by arranging the control signal in one allocation region candidate of a plurality of allocation region candidates provided in a search space, the radio transmitting apparatus comprising: a transmission mode setting section for setting either a first transmission mode having a plurality of submodes or a second transmission mode; a search space setting section for setting a UE specific search space for each receiving apparatus where the first transmission mode is set, and dividing the UE specific search space into a plurality of control channel element (CCE) subsets according to CCE aggregation level; and an allocation section for allocating the plurality of CCE subsets to downlink control information (DCI) formats corresponding to the plurality of submodes, respectively; wherein: the allocation region candidate is formed by one standard unit or by connecting a plurality of standard units; and the search space setting section sets the allocation region candidate associated with a fewer CCE aggregation level than a predetermined CCE aggregation level to a first CCE subset out of the plurality of subsets, and the allocation region candidate associated with a greater CCE aggregation level than the predetermined CCE aggregation level to a second CCE subset.