Method for operating terminal in carrier aggregation system, and apparatus using said method

摘要

A method for operating a terminal in a carrier aggregation system and a corresponding apparatus. In the method, downlink control information (DCI) including a downlink assignment index (DAI) can be received via an enhanced physical downlink control channel (E-PDCCH). The DCI received via the E-PDCCH includes an additional field which does not exist in the DCI received via a physical downlink control channel (PDCCH). If the DAI value is larger than 1, the additional field is used in selecting one of a plurality of PUCCH resources set by the upper layer, and the selected one resource is used in transmitting ACK/NACK.

主权项

1. A method of operating a terminal in a carrier aggregation system, the method comprising:
receiving downlink control information (DCI) including a downlink assignment index (DAI) through an enhanced physical downlink control channel (E-PDCCH) of a first subframe; receiving data scheduled by the DCI through a physical downlink shared channel (PDSCH) of the first subframe; transmitting an acknowledgement (ACK)/not-acknowledgement (NACK) for the data through a physical uplink control channel (PUCCH) in a second subframe, wherein the DCI received in the E-PDCCH includes an additional field which is not present in DCI received in a physical downlink control channel (PDCCH), and wherein if the DAI value is greater than 1, the additional field is used to select a single resource among a plurality of PUCCH resources configured by a higher layer, and the single resource is used to transmit the ACK/NACK.