There is a further need to enable antenna diversity for the transmission of a HARQ-ACK signal in response to an EPDCCH detection associated with a PDSCH.
The present invention has been made to address at least the above problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the present invention provides methods and apparatus for a UE to transmit and for a base station (NodeB) to receive a HARQ-ACK signal in a resource of a PUCCH.
In accordance with an embodiment of the present invention, a method is provided for wireless communications. Configuration information including a resource start offset and information for a transmission type of an EPDCCH are received. DCI, transmitted using at least one antenna port of a base station on the EPDCCH using at least one of CCEs, is received. A resource of a PUCCH is determined based on a first CCE of the at least one of CCEs, information in the DCI, and the resource start offset in the configuration information if the transmission type of the EPDCCH is distributed transmission. A HARQ-ACK signal is transmitted on the resource to the base station.