ACQUISITION AND TRANSMISSION OF HYBRID AUTOMATIC REPEAT REQUEST ACKNOWLEDGEMENT FEEDBACK, TERMINAL AND NETWORK SIDE DEVICE

1 . A method, performed by a terminal, comprising:

acquiring target Downlink Control Information (DCI), wherein the target DCI is used to indicate Downlink Feedback Information (DFI), the DFI comprises control information blocks corresponding to N carriers of K terminals and a first indicating field indicating a plurality of carriers with Hybrid Automatic Repeat Request ACKnowledgement (HARQ-ACK) feedback,

wherein the control information blocks comprise HARQ-ACK feedback of the corresponding N carriers and a Carrier Indicator Field (CIF), the CIF indicates an identifier (ID) of a carrier corresponding to the control information blocks, and K and N are integers greater than or equal to 1;

determining a number of bits occupied by the control information blocks in the DFI using a CIF size and a HARQ-ACK size; and

demodulating the HARQ-ACK feedback of the carrier within the number of bits occupied by the control information blocks.

2 . The method according to claim 1 , further comprising: acquiring a Radio Resource Control (RRC) configuration information, wherein the RRC configuration information is used to indicate a position of the HARQ-ACK of at least one carrier in the DFI before acquiring the target DCI.

3 . The method according to claim 2 , wherein the RRC configuration information comprises a plurality of mapping elements, wherein each mapping element comprises a carrier ID, and a position of the HARQ-ACK feedback of a carrier identified by the carrier ID in the DFI.

4 . The method according to claim 2 , wherein the RRC configuration information comprises a mapping element, wherein the mapping element comprises an ID of a first carrier of carrier aggregation, and a position of the HARQ-ACK feedback of the first carrier in the DFI.

5 . The method according to claim 3 , wherein acquiring the target DCI comprises:

determining a carrier identified by the mapping element included in the RRC configuration information; and

performing blind detection on the target DCI in a search space of the identified carrier.

6 . The method according to claim 4 , wherein acquiring the target DCI comprises:

determining a carrier identified by the mapping element included in the RRC configuration information; and

performing blind detection on the target DCI in a search space of the identified carrier.

7 . The method according to claim 1 , wherein:

the control information block comprises a second indicating field configured to indicate validity of the HARQ-ACK feedback of the carrier included in the control information block.

8 . The method according to claim 1 , wherein the control information block of a first carrier is used to carry HARQ-ACK feedback of other carriers if the first carrier does not have the HARQ-ACK feedback.

9 . The method according to claim 1 , further comprising:

determining a valid bit number of the HARQ-ACK feedback in the DFI based on the number of carriers indicated by the first indicating field, the CIF size in the DFI, and the HARQ-ACK size per carrier; and

demodulating the HARQ-ACK feedback of the carrier within the valid bit number of the DFI.

10 . The method according to claim 1 , wherein the control information block comprises: Transmit Power Control (TPC) of the carrier.

11 . The method according to claim 1 , further comprising: demodulating the target DCI by a dedicated Radio Network Temporary Identity (RNTI) of the terminal or a public RNTI of a terminal group, wherein:

the target DCI is indicated by a specific RNTI to indicate DFI; or

the target DCI is indicated by a third indicating field of the target DCI whether to indicate DFI.

12 . The method according to claim 1 , wherein a size of the target DCI is made equal to a size of DCI for indicating other information except for the DFI.