Search space reconstruction of the enhanced pdcch

The present invention avoids the flash interference from neighboring cells, and to assign the E-PDCCH in the best physical resource block (PRB) in scenarios where frequency variation occurs greatly, E-PDCCH (Enhanced in a wireless communication system the search space of a physical downlink control channel) relates to the rapid reconstruction. For this, to provide a method of providing feedback of a low-latency on reconstruction attempts search space enhanced PDCCH, and a corresponding apparatus. Specifically, to provide a signaling scheme that supports sending both HARQ-ACK for the HARQ-ACK and PDSCH (Physical Downlink Shared Channel) for E-PDCCH reconstruction based on PDCCH at the same uplink sub-frame . This makes it possible to transmit an ACK E-PDCCH reconfiguration information and PDSCH information based on PDCCH in the same subframe. .FIELD 8