Method for feeding back ACK/NACK for downlink data transmission in radio communication system

摘要

Embodiments of the present invention provide a method for feeding back ACK/NACK for downlink data transmission in a radio communication system. The method is applied on a mobile terminal and includes the following steps: receiving downlink data, calculating, with respect to each Compenent Carrier (CC), a number of ACKs of ACK/NACK information of downlink data sub-frames of the CC, and feeding back numbers of ACKs of the ACK/NACK information of the downlink data sub-frames of CCs.

主权项

1. A method for transmitting an ACK/NACK signal for data of two configured serving cells, the method comprising:
receiving a plurality of physical downlink shared channels (PDSCHs); mapping ACK/NACK bits; and transmitting the ACK/NACK signal based on the ACK/NACK bits on at least one of a physical uplink control channel (PUCCH) resource selected from a plurality of PUCCH resources for the two configured serving cells, wherein the mapping comprises: mapping, if there is a PDSCH without a corresponding physical downlink control channel (PDCCH), ACK/NACK for the PDSCH without the corresponding PDCCH at a bit 0 and ACK/NACK for a PDSCH with a corresponding PDCCH at a bit corresponding to a downlink assignment index (DAI) value in the corresponding PDCCH.