Generation of HARQ-ACK information and power control of HARQ-ACK signals in TDD systems with downlink of carrier aggregation
Methods and apparatus are provided for a User Equipment (UE) configured to have multiple cells in a DownLink (DL) of a Time Division Duplex (TDD) communication system so as to determine a power of an acknowledgement signal that the UE transmits in a control channel and to determine a number of acknowledgement information bits that the UE multiplexes with data information bits in a data channel. A transmission power of the control signal is determined based on DL Assignment Index (DAI) Information Elements (IEs) in DL Scheduling Assignments (SAs) that the UE detects through multiple transmission time intervals and through the multiple configured DL cells. The number of acknowledgement information bits in the data channel is determined based on a DAI IE of an UpLink (UL) SA associated with the transmission of the data channel.
1. A method of determining Physical Uplink Control Channel (PUCCH) transmit power, the method comprising:
determining acknowledgement information bits in response to received TBs within a bundling window in a cell c;
determining a transmit power based on a number of the received transport blocks and a number of missed downlink scheduling assignments, the number of missed downlink scheduling assignments being derived from V_dl_dai_c and U_dai_c; and
transmitting the acknowledgement information bits via a PUCCH using the transmit power,
wherein the V_dl_dai_c is a Downlink Assignment Index (DAI) value included in the last downlink scheduling assignment detected within the bundling window in the cell c, and U_dai_c is a total number of downlink scheduling assignments detected within the bundling window in the cell c.
2. The method of claim 1 , wherein the downlink scheduling assignment indicates at least one of starting a downlink data transmission and a semi-persistent scheduling release.
3. The method of claim 1 , wherein a size of the acknowledgement information bits is determined based on a number of configured cells and a transmission mode for each cell.
4. The method of claim 3 , wherein 2M bits are included for a cell in the acknowledgement information bits if a transmission mode for a cell indicates maximum of two TBs per transmission,
wherein M bits is included for a cell in the acknowledgement information bits if the transmission mode for the cell indicates only one transport block transmission, and
wherein M is a number of downlink subframes in the bundling window in the cell c.
5. A User Equipment (UE) apparatus for determining Physical Uplink Control Channel (PUCCH) transmit power, the apparatus comprising:
a controller configured to determine acknowledgement information bits in response to received TBs within a bundling window in a cell c, and to determine a transmit power based on a number of the received transport blocks and a number of missed downlink scheduling assignments, the number of missed downlink scheduling assignments being derived from V_dl_dai_c and U_dai_c; and
a transceiver configured to transmit the acknowledgement information bits via a PUCCH using the transmit power,
wherein the V_dl_dai_c is a Downlink Assignment Index (DAI) value included in the last downlink scheduling assignment detected within the bundling window in the cell c, and U_dai_c is a total number of downlink scheduling assignments detected within the bundling window in the cell c.
6. The apparatus of claim 5 , wherein the downlink scheduling assignment indicates at least one of starting a downlink data transmission and a semi-persistent scheduling release.
7. The apparatus of claim 5 , wherein a size of the acknowledgement information bits is determined based on a number of configured cells and a transmission mode for each cell.
8. The apparatus of claim 7 , wherein 2M bits are included for a cell in the acknowledgement information bits if a transmission mode for a cell indicates maximum of two TBs per transmission,
wherein M bits is included for a cell in the acknowledgement information bits if the transmission mode for the cell indicates only one transport block transmission, and
wherein M is a number of downlink subframes in the bundling window in the cell c.
9. A method of determining Physical Uplink Control Channel (PUCCH) transmit power, the method comprising:
determining acknowledgement information bits in response to detected downlink scheduling assignments within a bundling window in a cell c;
determining a transmit power based on a number of the detected downlink scheduling assignments and a number of missed downlink scheduling assignments, the number of missed downlink scheduling assignment being derived from V_dl_dai_c and U_dai_c; and
transmitting the acknowledgement information bits via a PUCCH using the transmit power,
wherein the V_dl_dai_c is a Downlink Assignment Index (DAI) value included in the last downlink scheduling assignment detected within the bundling window in the cell c, and U_dai_c is a total number of downlink scheduling assignments detected within the bundling window in the cell c.
10. The method of claim 9 , wherein the downlink scheduling assignment indicates at least one of starting a downlink data transmission and a semi-persistent scheduling release.
11. The method of claim 9 , wherein a size of the acknowledgement information bits is determined based on a number of configured cells.
12. The method of claim 11 , wherein M bits is included for a cell in the acknowledgement information bits, M being a number of downlink subframes in the bundling window.
13. A User Equipment (UE) apparatus for determining Physical Uplink Control Channel (PUCCH) transmit power, the apparatus comprising:
a controller configured to determine acknowledgement information bits in response to detected downlink scheduling assignments within a bundling window in a cell c and configured to determine a transmit power based on a number of the detected downlink scheduling assignments and a number of missed downlink scheduling assignments, the number of missed downlink scheduling assignment being derived from V_dl_dai_c and U_dai_c; and
a transceiver configured to transmit the acknowledgement information bits via a PUCCH using the transmit power,
wherein the V_dl_dai_c is a Downlink Assignment Index (DAI) value included in the last downlink scheduling assignment detected within the bundling window in the cell c, and U_dai_c is a total number of downlink scheduling assignments detected within the bundling window in the cell c.
14. The apparatus of claim 13 , wherein the downlink scheduling assignment indicates at least one of starting a downlink data transmission and a semi-persistent scheduling release.
15. The apparatus of claim 13 , wherein a size of the acknowledgement information bits is determined based on a number of configured cells.
16. The apparatus of claim 15 , wherein M bits is included for a cell in the acknowledgement information bits, M being a number of downlink subframes in the bundling window.