METHOD AND APPARATUS FOR SENDING AND RECEIVING HARQ-ACK FEEDBACK INFORMATION

摘要

Disclosed are a method and an apparatus for transmitting a HARQ-ACK feedback information used in CA when multiple CC have different TDD uplink-downlink organizations. UE receives PDCCH and PDSCH transmitted by a base station; determines the number of downlink sub frames corresponding to the HARQ-ACK feedback information transmitted from the PUSCH of each CC in the current uplink sub frame according to UL DAI obtained from the received PDCCH and the UL grant of the PDCCH, the sum of PDCCH numbers indicating downlink SPS release and PDSCH sub frame numbers received from a HARQ-ACK bundling window or the size of the HARQ-ACK bundling window; and transmits the HARQ-ACK feedback information of each CC through the PUSCH in the current uplink sub frame. The number of bits of HARQ-ACK information of each CC is determined according to the number of the downlink sub frames. [Reference numerals] (301) Receiving PDCCH and PDSCH transmitted by a base station; (302) Determining the number of DL sub frames corresponding to HARQ-ACK feedback information transmitted from PUSCH of each CC organized for UE in a current UL sub frame; (303) Determining the number of bits of HARQ-ACK information in each CC according to the number of DL sub frames; (304) Transmitting HARQ-ACK feedback information of each CC in a current UL sub frame through PUSCH