Patent ID: 9590786
Date: 2017-03-07
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method for transmitting an acknowledgement for an enhanced physical downlink control channel (EPDCCH) at a user equipment (UE) in a wireless communication system, the method comprising: receiving the EPDCCH; deciding a resource to be used to transmit the acknowledgement based on one or more of a value related to a lowest enhanced control channel element (ECCE) index among ECCEs used to transmit the EPDCCH, an antenna port index and a predetermined offset value indicated by downlink control information (DCI); and transmitting the acknowledgement by using the resource, wherein whether the predetermined offset value is used when deciding the resource is determined according to one or more of a type of the transmitted EPDCCH, a size of a DCI format, information related to an EPDCCH physical resource block (PRB) set on which the EPDCCH is transmitted, and a type of a signal transmitted on a PDSCH indicated by the EPDCCH, and wherein, if the size of the DCI format is greater than the predetermined offset value, the predetermined offset value is used when deciding the resource.