A method for simultaneous transmission of ACK/NACK feedback information and periodic Channel Quality Indication, CQI / Precoding Matrix Indicator, PMI / Rank Indication, RI, feedback bits, comprising: receiving, by a terminal equipment, downlink data; generating, by the terminal equipment, K bits ACK/NACK feedback bits for the data in M downlink sub-frames on N configured downlink carriers, wherein: N ≥ 1, M ≥ 1, and the ACK/NACK feedback information of the data in the M downlink sub-frames is transmitted in one uplink sub-frame; wherein generating the K bits ACK/NACK feedback bits comprises generating, by the terminal equipment, L bits ACK/NACK feedback bits for the data in M downlink sub-frames on the N configured downlink carriers, and generating, by the terminal equipment, T bits of assistant information, wherein, K is the sum of L and T; and the assistant information comprising at least M+2 states, wherein, M states indicate the number greater than or equal to 1 of downlink sub-frames with Physical Downlink Control Channel, PDCCH, transmission received by the terminal equipment in the M downlink sub-frames, a first independent state different from the M states of the assistant information is used to indicate that the terminal equipment only receives downlink sub-frames without corresponding PDCCH transmission, a second independent state different from the M states and the first independent state is used to indicate that the terminal equipment does not receive any downlink sub-frames, and a PDCCH is used to transmit the downlink grant of a Physical Downlink Shared Channel, PDSCH, or is a PDCCH indicating the activation/release of semi-persistent PDSCHs; generating, by the terminal equipment, S bits periodic CQI/PMI/RI feedback bits; sending, by the terminal equipment, S bits periodic CQI/PMI/RI feedback bits and K bits ACK/NACK feedback bits simultaneously in the uplink sub-frame using Physical Uplink Control Channel, PUCCH, format 3. receiving, by a terminal equipment, downlink data; generating, by the terminal equipment, K bits ACK/NACK feedback bits for the data in M downlink sub-frames on N configured downlink carriers, wherein: N ≥ 1, M ≥ 1, and the ACK/NACK feedback information of the data in the M downlink sub-frames is transmitted in one uplink sub-frame; wherein generating the K bits ACK/NACK feedback bits comprises generating, by the terminal equipment, L bits ACK/NACK feedback bits for the data in M downlink sub-frames on the N configured downlink carriers, and generating, by the terminal equipment, T bits of assistant information, wherein, K is the sum of L and T; and the assistant information comprising at least M+2 states, wherein, M states indicate the number greater than or equal to 1 of downlink sub-frames with Physical Downlink Control Channel, PDCCH, transmission received by the terminal equipment in the M downlink sub-frames, a first independent state different from the M states of the assistant information is used to indicate that the terminal equipment only receives downlink sub-frames without corresponding PDCCH transmission, a second independent state different from the M states and the first independent state is used to indicate that the terminal equipment does not receive any downlink sub-frames, and a PDCCH is used to transmit the downlink grant of a Physical Downlink Shared Channel, PDSCH, or is a PDCCH indicating the activation/release of semi-persistent PDSCHs; generating, by the terminal equipment, S bits periodic CQI/PMI/RI feedback bits; sending, by the terminal equipment, S bits periodic CQI/PMI/RI feedback bits and K bits ACK/NACK feedback bits simultaneously in the uplink sub-frame using Physical Uplink Control Channel, PUCCH, format 3. N ≥ 1, M ≥ 1, and the ACK/NACK feedback information of the data in the M downlink sub-frames is transmitted in one uplink sub-frame; wherein generating the K bits ACK/NACK feedback bits comprises generating, by the terminal equipment, L bits ACK/NACK feedback bits for the data in M downlink sub-frames on the N configured downlink carriers, and generating, by the terminal equipment, T bits of assistant information, wherein, K is the sum of L and T; and the assistant information comprising at least M+2 states, wherein, M states indicate the number greater than or equal to 1 of downlink sub-frames with Physical Downlink Control Channel, PDCCH, transmission received by the terminal equipment in the M downlink sub-frames, a first independent state different from the M states of the assistant information is used to indicate that the terminal equipment only receives downlink sub-frames without corresponding PDCCH transmission, a second independent state different from the M states and the first independent state is used to indicate that the terminal equipment does not receive any downlink sub-frames, and a PDCCH is used to transmit the downlink grant of a Physical Downlink Shared Channel, PDSCH, or is a PDCCH indicating the activation/release of semi-persistent PDSCHs; generating, by the terminal equipment, S bits periodic CQI/PMI/RI feedback bits; sending, by the terminal equipment, S bits periodic CQI/PMI/RI feedback bits and K bits ACK/NACK feedback bits simultaneously in the uplink sub-frame using Physical Uplink Control Channel, PUCCH, format 3.