Devices for sending and receiving feedback information
A method for sending feedback information by a User Equipment (UE) is described. The method includes determining uplink-downlink (UL-DL) configurations for multiple cells. At least two of the multiple cells have different uplink-downlink (UL-DL) configurations. The method also includes determining first feedback factors for the multiple cells based on a second feedback factor. The method further includes sending Hybrid Automatic Repeat Request Acknowledgement/Negative Acknowledgement (HARQ-ACK) information on a Physical Uplink Shared Channel (PUSCH) based on the first feedback factors for the multiple cells.
1. A User Equipment (UE) for transmitting information to an evolved Node B (eNB), the UE comprising:
operation controlling circuitry that determines a Time-Division Duplexing (TDD) uplink-downlink (UL-DL) configuration of each serving cell, wherein the TDD UL-DL configurations of at least two configured serving cells are not the same; and
a transmitter that transmits Hybrid Automatic Repeat Request Acknowledgement/Negative Acknowledgement (HARQ-ACK) information in a subframe n based on a first feedback factor B c DL according to whether or not a detected Downlink Control Information (DCI) format 0/4 for a c-th serving cell includes a Downlink Assignment Index (DAI) for determining a parameter W DAI UL , the first feedback factor B c DL is the number of subframes for which the UE needs to feedback HARQ-ACK bits for the c-th serving cell, wherein
in a case of a transmission of the HARQ-ACK information in the subframe n on a Physical Uplink Shared Channel (PUSCH) transmission adjusted based on the detected DCI format 0/4 for the c-th serving cell with the DAI for determining the parameter W DAI UL , the first feedback factor B c DL for the c-th serving cell is determined based on a parameter M c and the parameter W DAI UL , the parameter W DAI UL corresponding to an uplink reference UL-DL configuration of the c-th serving cell corresponding to the PUSCH transmission,
in a case of the transmission of the HARQ-ACK information in the subframe n on the PUSCH transmission adjusted based on the detected DCI format 0/4 for the c-th serving cell without a value for the parameter W DAI UL , the first feedback factor B c DL for the c-th serving cell is determined based on the parameter M c but not the parameter W DAI UL , the parameter M c is the number of elements in a set K c , the set K c includes one or more values of k of the c-th serving cell, the W DAI UL is determined by the DAI,
the subframe n corresponds to a subframe n−k for the c-th serving cell on a Physical Downlink Shared Channel (PDSCH), and
it is determined, for each serving cell, whether or not the DCI format 0/4 for the each serving cell includes the DAI based on a configuration of the each serving cell.
2. The UE of claim 1 , wherein
the first feedback factor B c DL for the c-th serving cell determined based on the parameter M c and the parameter W DAI UL is determined based on a selected equation among (i) a first equation including the parameter M c and the parameter W DAI UL and (ii) a second equation, which is different from the first equation, including the parameter M c and the parameter W DAI UL .
3. An evolved Node B (eNB) for receiving information from a User Equipment (UE), the eNB comprising:
operation controlling circuitry that determines a Time-Division Duplexing (TDD) uplink-downlink (UL-DL) configuration of each serving cell, wherein the TDD UL-DL configurations of at least two configured serving cells are not the same; and
a receiver that receives Hybrid Automatic Repeat Request Acknowledgement/Negative Acknowledgement (HARQ-ACK) information in a subframe n based on a first feedback factor B c DL according to whether or not a detected Downlink Control Information (DCI) format 0/4 for a c-th serving cell includes a Downlink Assignment Index (DAI) for determining a parameter W DAI UL , the first feedback factor B c DL is the number of subframes for which the UE needs to feedback HARQ-ACK bits for the c-th serving cell, wherein
in a case of a transmission of the HARQ-ACK information in the subframe n on a Physical Uplink Shared Channel (PUSCH) transmission adjusted based on the detected DCI format 0/4 for the c-th serving cell with the DAI for determining the parameter W DAI UL , the first feedback factor B c DL for the c-th serving cell is determined based on a parameter M c and the parameter W DAI UL , the parameter W DAI UL corresponding to an uplink reference UL-DL configuration of the c-th serving cell corresponding to the PUSCH transmission,
in a case of the transmission of the HARQ-ACK information in the subframe n on the PUSCH transmission adjusted based on the detected DCI format 0/4 for the serving cell without a value for the parameter W DAI UL , the first feedback factor B c DL for the c-th serving cell is determined based on the parameter M c but not the parameter W DAI UL , the parameter M c is the number of elements in a set K c , the set K c includes one or more values of k of the c-th serving cell, and the W DAI UL is determined by the DAI, and the subframe n corresponds to a subframe n−k for the c-th serving cell on a Physical Downlink Shared Channel (PDSCH), and
it is determined, for each serving cell, whether or not the DCI format 0/4 for the each serving cell includes the DAI based on a configuration of the each serving cell.
4. The eNB of claim 3 , wherein
the first feedback factor B c DL for the c-th serving cell determined based on the parameter M c and the parameter W DAI UL is determined based on a selected equation among (i) a first equation including the parameter M c and the parameter W DAI UL and (ii) a second equation, which is different from the first equation, including the parameter M c and the parameter W DAI UL .
5. A method for transmitting information by a User Equipment (UE), the method comprising:
determining a Time-Division Duplexing (TDD) uplink-downlink (UL-DL) configuration of each serving cell, wherein the TDD UL-DL configurations of at least two configured serving cells are not the same; and
transmitting Hybrid Automatic Repeat Request Acknowledgement/Negative Acknowledgement (HARQ-ACK) information in a subframe n based on a first feedback factor B c DL according to whether or not a detected Downlink Control Information (DCI) format 0/4 for a c-th serving cell includes a Downlink Assignment Index (DAI) for determining a parameter W DAI UL , the first feedback factor B c DL is the number of subframes for which the UE needs to feedback HARQ-ACK bits for the c-th serving cell, wherein
in a case of a transmission of the HARQ-ACK information in the subframe n on a Physical Uplink Shared Channel (PUSCH) transmission adjusted based on the detected DCI format 0/4 for the c-th serving cell with the DAI determining the parameter W DAI UL , the first feedback factor B c DL for the c-th serving cell is determined based on a parameter M c and the parameter W DAI UL , the parameter W DAI UL corresponding to an uplink reference UL-DL configuration of the c-th serving cell corresponding to the PUSCH transmission,
in a case of the transmission of the HARQ-ACK information in the subframe n on the PUSCH transmission adjusted based on the detected DCI format 0/4 for the c-th serving cell without a value for the parameter W DAI UL , the first feedback factor B c DL for the c-th serving cell is determined based on the parameter M c but not the parameter W DAI UL , the parameter M c is the number of elements in a set K c , the set K c includes one or more values of k of the c-th serving cell, and the W DAI UL is determined by the DAI, and the subframe n corresponds to a subframe n−k for the c-th serving cell on a Physical Downlink Shared Channel (PDSCH), and
it is determined, for each serving cell, whether or not the DCI format 0/4 for the each serving cell includes the DAI based on a configuration of the each serving cell.
6. The method for transmitting information by the UE of claim 5 , wherein
the first feedback factor B c DL for the c-th serving cell determined based on the parameter M c and the parameter W DAI UL is determined based on a selected equation among (i) a first equation including the parameter M c and the parameter W DAI UL and (ii) a second equation, which is different from the first equation, including the parameter M c and the parameter W DAI UL .
7. A method for receiving information by an evolved Node B (eNB), the method comprising:
determining a Time-Division Duplexing (TDD) uplink-downlink (UL-DL) configuration of each serving cell, wherein the TDD UL-DL configurations of at least two configured serving cells are not the same;
receiving Hybrid Automatic Repeat Request Acknowledgement/Negative Acknowledgement (HARQ-ACK) information in a subframe n based on a first feedback factor B c DL according to whether or not a detected Downlink Control Information (DCI) format 0/4 for a c-th serving cell includes a Downlink Assignment Index (DAI) for determining a parameter W DAI UL , the first feedback factor B c DL is the number of subframes for which the UE needs to feedback HARQ-ACK bits for the c-th serving cell, wherein
in a case of a transmission of the HARQ-ACK information in the subframe n on a Physical Uplink Shared Channel (PUSCH) transmission adjusted based on the detected DCI format 0/4 for the c-th serving cell with the DAI for determining the parameter W DAI UL , the first feedback factor B c DL for the c-th serving cell is determined based on a parameter M c and the parameter W DAI UL , the parameter W DAI UL corresponding to an uplink reference UL-DL configuration of the c-th serving cell corresponding to the PUSCH transmission,
in case of the transmission of the HARQ-ACK information in the subframe n on the PUSCH transmission adjusted based on the detected DCI format 0/4 for the c-th serving cell without a value for the parameter W DAI UL , the first feedback factor B c DL for the c-th serving cell is determined based on the parameter M c but not the parameter W DAI UL , the parameter M c is the number of elements in a set K c , the set K c includes one or more values of k of the c-th serving cell, and the W DAI UL is determined by the DAI, and the subframe n corresponds to a subframe n−k for the c-th serving cell on a Physical Downlink Shared Channel (PDSCH), and
it is determined, for each serving cell, whether or not the DCI format 0/4 for the each serving cell includes the DAI based on a configuration of the each serving cell.
8. The method for receiving information by the eNB of claim 7 , wherein
the first feedback factor B c DL for the c-th serving cell determined based on the parameter M c and the parameter W DAI UL is determined based on a selected equation among (i) a first equation including the parameter M c and the parameter W DAI UL and (ii) a second equation, which is different from the first equation, including the parameter M c and the parameter W DAI UL .