Patent ID: 9591519
Date: 2017-03-07
CPC Classifications: H04J,H04L,H04W

Claim:
1. A radio communication terminal comprising: a receiver which, in operation, receives control information using a physical resource block (PRB) set that forms an enhanced physical downlink control channel (E-PDCCH), the PRB set including one or more PRBs; a controller which, in operation, monitors a PRB set out of a plurality of predetermined PRB sets and determines an ACK/NACK resource based on both the monitored PRB set and an ACK/NACK Resource Indicator (ARI) included in the E-PDCCH of the monitored PRB set, wherein a plurality of ACK/NACK resource candidates sets are respectively configured for the plurality of predetermined PRB sets by radio resource control (RRC) and the ARI indicates the ACK/NACK resource in the ACK/NACK resource candidates set configured for the monitored PRB set; and a transmitter which, in operation, transmits ACK/NACK signal using the determined ACK/NACK resource.