Generation of HARQ-ACK information and power control of HARQ-ACK signals in TDD systems with downlink of carrier aggregation

Abstract

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.

What is claimed is: 
     
       1. A method for wireless communication, the method comprising:
 receiving at least one transport block (TB) within a bundling window in a cell among multiple configured cells; 
 generating acknowledgement bits in response to the received at least one TB based on an uplink (UL) downlink assignment index (DAI) value of a received UL scheduling assignment (SA) for a physical uplink shared channel (PUSCH) when the UL SA for the PUSCH is received; 
 generating acknowledgement bits in response to the received at least one TB based on a number of the multiple configured cells when the UL SA for the PUSCH is not received; and 
 transmitting the generated acknowledgement bits on at least one of the PUSCH and a physical uplink control channel (PUCCH). 
 
     
     
       2. The method of  claim 1 , wherein the generated acknowledgement bits comprise a number of bits corresponding to a size of the bundling window for a first configured cell having a transmission mode conveying a maximum of one TB when the UL SA for the PUSCH is not received. 
     
     
       3. The method of  claim 1 , wherein the generated acknowledgement bits comprise a number of bits corresponding to twice a size of the bundling window for a second configured cell having a transmission mode conveying a maximum of two TBs when the UL SA for the PUSCH is not received. 
     
     
       4. The method of  claim 1 , wherein the generated acknowledgement bits comprise a number of bits corresponding to the number corresponding to the DAI value for a first configured cell having a transmission mode conveying a maximum of one TB when the UL SA for the PUSCH is received. 
     
     
       5. The method of  claim 1 , wherein the generated acknowledgement bits comprise a number of bits corresponding to twice a number corresponding to the DAI value for a second configured cell having a transmission mode conveying a maximum of two TBs when the UL SA for the PUSCH is received. 
     
     
       6. A user equipment (UE) apparatus for wireless communication, the apparatus comprising:
 a transceiver configured to receive at least one transport block (TB) within a bundling window in a cell among multiple configured cells; and 
 at least one processor configured to:
 generate acknowledgement bits in response to the received at least one TB based on an uplink (UL) downlink assignment index (DAI) value of a received UL scheduling assignment (SA) for a physical uplink shared channel (PUSCH) when the UL SA for the PUSCH is received, and 
 generate acknowledgement bits in response to the received at least one TB based on a number of the multiple configured cells when the UL SA for the PUSCH is not received, 
 
 wherein the transceiver is further configured to transmit the generated acknowledgement bits on at least one of the PUSCH and a physical uplink control channel (PUCCH). 
 
     
     
       7. The apparatus of  claim 6 , wherein the generated acknowledgement bits comprise a number of bits corresponding to a size of the bundling window for a first configured cell having a transmission mode conveying a maximum of one TB when the UL SA for the PUSCH is not received. 
     
     
       8. The apparatus of  claim 6 , wherein the generated acknowledgement bits comprise a number of bits corresponding to twice a size of the bundling window for a second configured cell having a transmission mode conveying a maximum of two TBs when the UL SA for the PUSCH is not received. 
     
     
       9. The apparatus of  claim 6 , wherein the generated acknowledgement bits comprise a number of bits corresponding to the number corresponding to the DAI value for a first configured cell having a transmission mode conveying a maximum of one TB when the UL SA for the PUSCH is received. 
     
     
       10. The apparatus of  claim 6 , wherein the generated acknowledgement bits comprise a number of bits corresponding to twice a number corresponding to the DAI value for a second configured cell having a transmission mode conveying a maximum of two TBs when the UL SA for the PUSCH is received. 
     
     
       11. A method for wireless communication, the method comprising:
 transmitting, to a user equipment (UE), at least one transport block (TB) within a bundling window in a cell among multiple configured cells; and 
 receiving acknowledgement bits on at least one of a physical uplink shared channel (PUSCH) and a physical uplink control channel (PUCCH), 
 wherein the received acknowledgement bits are generated in response to the transmitted at least one TB based on one of an uplink (UL) downlink assignment index (DAI) value of a transmitted UL scheduling assignment (SA) for the PUSCH when the UL SA for the PUSCH is transmitted and a number of the multiple configured cells when the UL SA for the PUSCH is not transmitted. 
 
     
     
       12. The method of  claim 11 , wherein the received acknowledgement bits comprise a number of bits corresponding to a size of the bundling window for a first configured cell having a transmission mode conveying a maximum of one TB when the UL SA for the PUSCH is not transmitted. 
     
     
       13. The method of  claim 11 , wherein the received acknowledgement bits comprise a number of bits corresponding to twice a size of the bundling window for a second configured cell having a transmission mode conveying a maximum of two TBs when the UL SA for the PUSCH is not transmitted. 
     
     
       14. The method of  claim 11 , wherein the received acknowledgement bits comprise a number of bits corresponding to the number corresponding to the DAI value for a first configured cell having a transmission mode conveying a maximum of one TB when the UL SA for the PUSCH is transmitted. 
     
     
       15. The method of  claim 11 , wherein the received acknowledgement bits comprise a number of bits corresponding to twice a number corresponding to the DAI value for a second configured cell having a transmission mode conveying a maximum of two TBs when the UL SA for the PUSCH is transmitted. 
     
     
       16. A base station apparatus for wireless communication, the apparatus comprising:
 a transceiver configured to:
 transmit, to a user equipment (UE), at least one transport block (TB) within a bundling window in a cell among multiple configured cells, and 
 receive acknowledgement bits on at least one of a physical uplink shared channel (PUSCH) and a physical uplink control channel (PUCCH), 
 
 wherein the received acknowledgement bits are generated in response to the transmitted at least one TB based on one of an uplink (UL) downlink assignment index (DAI) value of a transmitted UL scheduling assignment (SA) for the PUSCH when the UL SA for the PUSCH is transmitted and a number of the multiple configured cells when the UL SA for the PUSCH is not transmitted. 
 
     
     
       17. The apparatus of  claim 16 , wherein the received acknowledgement bits comprise a number of bits corresponding to a size of the bundling window for a first configured cell having a transmission mode conveying a maximum of one TB when the UL SA for the PUSCH is not transmitted. 
     
     
       18. The apparatus of  claim 16 , wherein the received acknowledgement bits comprise a number of bits corresponding to twice a size of the bundling window for a second configured cell having a transmission mode conveying a maximum of two TBs when the UL SA for the PUSCH is not transmitted. 
     
     
       19. The apparatus of  claim 16 , wherein the received acknowledgement bits comprise a number of bits corresponding to the number corresponding to the DAI value for a first configured cell having a transmission mode conveying a maximum of one TB when the UL SA for the PUSCH is transmitted. 
     
     
       20. The apparatus of  claim 16 , wherein the received acknowledgement bits comprise a number of bits corresponding to twice a number corresponding to the DAI value for a second configured cell having a transmission mode conveying a maximum of two TBs when the UL SA for the PUSCH is transmitted. 
     
     
       21. A method performed by a user equipment (UE) to determine a physical uplink control channel (PUCCH) transmission power for transmitting hybrid automatic repeat request-acknowledgement (HARQ-ACK) information bits in a communication system, the method comprising:
 determining a number of HARQ-ACK information bits for receptions of physical downlink shared channels (PDSCHs) associated with downlink control information (DCI) formats in physical downlink control channels (PDCCHs) over a number of PDCCH monitoring occasions for a cell;   determining a PUCCH transmission power based on the number of HARQ-ACK information bits; and   transmitting a PUCCH with the HARQ-ACK information bits using the PUCCH transmission power,   wherein the number of HARQ-ACK information bits is determined based on a value of a downlink assignment index (DAI) in a last DCI format that the UE detects for the cell and a total number of DCI formats that the UE detects for the cell over the number of PDCCH monitoring occasions.   
     
     
       22. The method of claim 21, wherein a DCI format schedules PDSCH receptions for the cell. 
     
     
       23. The method of claim 21, wherein a DCI format indicates semi-persistent scheduling (SPS) PDSCH release for the cell. 
     
     
       24. The method of claim 21, wherein the number of HARQ-ACK information bits is determined further based on a sum of a number of transport blocks that the UE receives in a PDSCH scheduled by a DCI format that the UE detects in a PDCCH monitoring occasion over the number of the PDCCH monitoring occasions for the cell, in case that a spatial bundling of HARQ-ACK information bits is not applied. 
     
     
       25. The method of claim 21, wherein the number of HARQ-ACK information bits is determined further based on a sum of a number of the DCI formats that the UE detects in a PDCCH monitoring occasion over the number of PDCCH monitoring occasions for the cell, in case that a spatial bundling of HARQ-ACK information bits is applied. 
     
     
       26. The method of claim 21, wherein the number of HARQ-ACK information bits is determined further based on a sum of a number of DCI formats that the UE detects and indicate SPS PDSCH release in a PDCCH monitoring occasion over the number of PDCCH monitoring occasions for the cell. 
     
     
       27. The method of claim 21,
 wherein the number of HARQ-ACK information bits is determined further based on a value indicating a number of transport blocks in a PDSCH, and   wherein the value is a value of a higher layer parameter for the cell in case that a spatial bundling of HARQ-ACK information bits is not applied, and the value is 1 in case that the spatial bundling of HARQ-ACK information bits is applied.   
     
     
       28. The method of claim 21, wherein the number of HARQ-ACK information bits is determined further based on a number of SPS PDSCH receptions. 
     
     
       29. A user equipment (UE) to determine a physical uplink control channel (PUCCH) transmission power for transmitting hybrid automatic repeat request-acknowledgement (HARQ-ACK) information bits in a communication system, the UE comprising:
 a processor configured to:
 determine a number of HARQ-ACK information bits for receptions of physical downlink shared channels (PDSCHs) associated with downlink control information (DCI) formats in physical downlink control channels (PDCCHs) over a number of PDCCH monitoring occasions for a cell, and 
 determine a PUCCH transmission power based on the number of HARQ-ACK information bits; and 
   a transceiver configured to transmit a PUCCH with the HARQ-ACK information bits using the PUCCH transmission power,   wherein the number of HARQ-ACK information bits is determined based on a value of a downlink assignment index (DAI) in a last DCI format that the UE detects for the cell and a total number of DCI formats that the UE detects for the cell over the number of PDCCH monitoring occasions.   
     
     
       30. The UE of claim 29, wherein a DCI format schedules PDSCH receptions for the cell. 
     
     
       31. The UE of claim 29, wherein a DCI format indicates semi-persistent scheduling (SPS) PDSCH release for the cell. 
     
     
       32. The UE of claim 29, wherein the processor is further configured to determine the number of HARQ-ACK information bits based on a sum of a number of transport blocks that the UE receives in a PDSCH scheduled by a DCI format that the UE detects in a PDCCH monitoring occasion over the number of the PDCCH monitoring occasions for the cell, in case that a spatial bundling of HARQ-ACK information bits is not applied. 
     
     
       33. The UE of claim 29, wherein the processor is further configured to determine the number of HARQ-ACK information bits based on a sum of a number of the DCI formats that the UE detects in a PDCCH monitoring occasion over the number of PDCCH monitoring occasions for the cell, in case that a spatial bundling of HARQ-ACK information bits is applied. 
     
     
       34. The UE of claim 29, wherein the processor is further configured to determine the number of HARQ-ACK information bits based on a sum of a number of DCI formats that the UE detects and indicate SPS PDSCH release in a PDCCH monitoring occasion over the number of PDCCH monitoring occasions for the cell. 
     
     
       35. The UE of claim 29,
 wherein the processor is further configured to determine the number of HARQ-ACK information bits based on a value indicating a number of transport blocks in a PDSCH, and   wherein the value is a value of a higher layer parameter for the cell in case that a spatial bundling of HARQ-ACK information bits is not applied, and the value is 1 in case that the spatial bundling of HARQ-ACK information bits is applied.   
     
     
       36. The UE of claim 29, wherein the processor is further configured to determine the number of HARQ-ACK information bits based on a number of SPS PDSCH receptions.