Method and device for transmitting/receiving uplink control information in wireless communication system

Abstract

A method is provided for transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) information in a wireless communication system. A User Equipment (UE) configures a Physical Uplink Control Channel (PUCCH) format 3 for transmission of the ACK/NACK information. The UE transmits the ACK/NACK information for downlink transmission in a downlink subframe set including M downlink subframes in one uplink subframe, wherein M>1. A plurality of serving cells are configured for the UE and include one Primary Cell (PCell) and at least one Secondary Cell (SCell). The UE transmits the ACK/NACK information using a PUCCH format 1b when a first condition is met that comprises a condition in case where the ACK/NACK information corresponds to one Physical Downlink Shared Channel (PDSCH) without a corresponding Physical Downlink Control Channel (PDCCH) received only on the PCell in the downlink subframe set and the ACK/NACK information corresponds to an additional PDSCH indicated by detection of one corresponding PDCCH.

What is claimed is: 
     
       1. A method for transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) information in a wireless communication system, the method performed by a User Equipment (UE) configured to use a Physical Uplink Control Channel (PUCCH) format 3 and comprising:
 configuring the PUCCH format 3 for a transmission of the ACK/NACK information; and   transmitting the ACK/NACK information for downlink transmission in a downlink subframe set including M downlink subframes in one uplink subframe, wherein M>1,   wherein a plurality of serving cells are configured for the UE and include one Primary Cell (PCell) and at least one Secondary Cell (SCell),   wherein the UE transmits the ACK/NACK information using a PUCCH format 1b when a first condition is met, and   wherein the first condition comprises a condition in case where the ACK/NACK information corresponds to one Physical Downlink Shared Channel (PDSCH) without a corresponding Physical Downlink Control Channel (PDCCH) received only on the PCell in the downlink subframe set and the ACK/NACK information corresponds to an additional PDSCH indicated by detection of one corresponding PDCCH.   
     
     
       2. The method according to  claim 1 , wherein the one corresponding PDCCH has a Downlink Assignment Index (DAI) value of 1. 
     
     
       3. The method according to  claim 1 , wherein the UE further transmits the ACK/NACK information using the PUCCH format 1b when a second condition is met, and
 wherein the second condition comprises a condition in case where the ACK/NACK information corresponds to the one PDSCH without the corresponding PDCCH received only on the PCell in the downlink subframe set and a Semi-Persistent Scheduling (SPS) release PDCCH having a Downlink Assignment Index (DAI) value of 1.   
     
     
       4. The method according to  claim 3 , wherein the UE transmits the ACK/NACK information using the PUCCH format 3 when the first condition and the second condition are not met. 
     
     
       5. The method according to  claim 1 , wherein a PUCCH resource used for transmitting the ACK/NACK information is selected from among 3 PUCCH resources, when a number of transport blocks of the downlink transmission in the downlink subframe set is 2. 
     
     
       6. The method according to  claim 5 , wherein one of the 3 PUCCH resources is determined according to a higher layer configuration, and
 wherein the other resources of the 3 PUCCH resources are determined using a Control Channel Element (CCE) index of the corresponding PDCCH.   
     
     
       7. The method according to  claim 1 , wherein a PUCCH resource used for transmitting the ACK/NACK information is selected from among 2 PUCCH resources, when a number of transport blocks of the downlink transmission in the downlink subframe set is 1. 
     
     
       8. The method according to  claim 1 , wherein the ACK/NACK information is transmitted by using 2 bits in the one uplink subframe. 
     
     
       9. The method according to  claim 1 , wherein the wireless communication system is a Time Division Duplex (TDD) system. 
     
     
       10. A User Equipment (UE) for transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) information in a wireless communication system, the UE configured to use a Physical Uplink Control Channel (PUCCH) format 3 and comprising:
 a receiver configured to receive a downlink signal from a Base Station (BS);   a transmitter configured to transmit an uplink signal to the BS; and   a processor configured to control the UE including the receiver and the transmitter,   wherein the processor is further configured to:
 configure the PUCCH format 3 for a transmission of the ACK/NACK information; and 
 control the transmitter to transmit the ACK/NACK information for downlink transmission in a downlink subframe set including M downlink subframes in one uplink subframe, 
   wherein M>1,   wherein a plurality of serving cells are configured for the UE and the more than one serving cell includes one Primary Cell (PCell) and at least one Secondary Cell (SCell),   wherein the UE transmits the ACK/NACK information using a PUCCH format 1b when a first condition is met, and   wherein the first condition comprises a condition in case where the ACK/NACK information corresponds to one Physical Downlink Shared Channel (PDSCH) without a corresponding Physical Downlink Control Channel (PDCCH) received by the receiver only on the PCell in the downlink subframe set and the ACK/NACK information further corresponds to an additional PDSCH indicated by detection of one corresponding PDCCH.   
     
     
       11. The UE according to  claim 10 , wherein the one corresponding PDCCH has a Downlink Assignment Index (DAI) value of 1. 
     
     
       12. The UE according to  claim 10 , wherein the processor further controls the transmitter to transmit the ACK/NACK information using the PUCCH format 1b when a second condition is met,
 wherein the second condition comprises a condition in case where the ACK/NACK information corresponds to the one PDSCH without the corresponding PDCCH received only on the PCell in the downlink subframe set and a Semi-Persistent Scheduling (SPS) release PDCCH having a Downlink Assignment Index (DAI) value of 1.   
     
     
       13. The UE according to  claim 12 , wherein the processor further controls the transmitter to transmit the ACK/NACK information using the PUCCH format 3 when the first condition and the second condition are not met. 
     
     
       14. The UE according to  claim 10 , wherein a PUCCH resource used for transmitting the ACK/NACK information is selected from among 3 PUCCH resources, when a number of transport blocks of the downlink transmission in the downlink subframe set is 2. 
     
     
       15. The UE according to  claim 14 , wherein one of the 3 PUCCH resources is determined according to a higher layer configuration, and
 wherein the other resources of the 3 PUCCH resources are determined using a Control Channel Element (CCE) index of the corresponding PDCCH.   
     
     
       16. The UE according to  claim 10 , wherein a PUCCH resource used for transmitting the ACK/NACK information is selected from among 2 PUCCH resources, when a number of transport blocks of the downlink transmission in the downlink subframe set is 1. 
     
     
       17. The UE according to  claim 10 , wherein the ACK/NACK information is transmitted by using 2 bits in the one uplink subframe. 
     
     
       18. The UE according to  claim 10 , wherein the wireless communication system is a Time Division Duplex (TDD) system. 
     
     
       19. A method of transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) information by a user equipment (UE) configured with a plurality of serving cells in a Time Division Duplex (TDD) wireless communication system, the method comprising:
 determining a Physical Uplink Control Channel (PUCCH) format for transmitting the ACK/NACK information related with at least one downlink transmission; and   transmitting the ACK/NACK information based on the PUCCH format,   wherein, in a first state in which (i) the at least one downlink transmission includes a first Physical Downlink Control Channel (PDCCH) for downlink Semi-Persistent Scheduling (SPS) release, and (ii) the first PDCCH includes a Downlink Assignment Index (DAI) value related to an accumulative number of PDCCHs per each serving cell:
 the PUCCH format is determined as PUCCH format 1a/1b based on that the at least one downlink transmission consists of only the first PDCCH and the DAI value is equal to an initial value, and 
 the PUCCH format is determined as PUCCH format 3 based on that the DAI value is greater than the initial value. 
   
     
     
       20. The method according to  claim 19 ,
 wherein the plurality of serving cells include a Primary cell (PCell) and at least one Secondary Cell (SCell).   
     
     
       21. The method according to  claim 20 ,
 wherein the PUCCH format for the ACK/NACK information is determined as the PUCCH format 1a/1b in a second state in which the at least one downlink transmission consists of only one downlink transmission including:   a single PDSCH which is received on the PCell and which is indicated by a corresponding PDCCH, wherein the corresponding PDCCH is received on the PCell and has a DAI value equal to the initial value.   
     
     
       22. The method according to  claim 21 ,
 wherein the PUCCH format for the ACK/NACK information is determined as the PUCCH format 1a/1b in a third state in which the at least one downlink transmission consists of only one downlink transmission including:   a single PDSCH which is received on the PCell, and for which a corresponding PDCCH is not received.   
     
     
       23. The method according to  claim 19 ,
 wherein a resource for transmitting the ACK/NACK information based on the PUCCH format 3 is indicated based on a Transmit Power Control (TPC) field in the first PDCCH.   
     
     
       24. The method according to  claim 23 ,
 wherein the PUCCH format for the ACK/NACK information is determined as the PUCCH format 3 in a fifth state in which the at least one downlink transmission further includes at least:   a second PDSCH received on an SCell among the plurality of serving cells,   wherein a resource for transmitting the ACK/NACK information based on the PUCCH format 3 is indicated based on a TPC field in a second PDCCH which is received on the SCell and which corresponds to the second PDSCH.   
     
     
       25. The method of  claim 19 , wherein the at least one downlink transmission is received in a subframe set including M subframes, wherein the M is greater than 1. 
     
     
       26. A User Equipment (UE) configured with a plurality of serving cells in a Time Division Duplex (TDD) wireless communication system, the UE comprising:
 a transmitter and a receiver;   a processor; and   a memory coupled operably connectable to the processor and storing instructions that, when executed, cause the processor to perform operations comprising:   determining a Physical Uplink Control Channel (PUCCH) format for transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) information related with at least the downlink transmission; and   transmitting through the transmitter, the ACK/NACK information based on the PUCCH format,   wherein, in a first state in which (i) the at least one downlink transmission includes a first Physical Downlink Control Channel (PDCCH) for downlink Semi-Persistent Scheduling (SPS) release, and (ii) the first PDCCH includes a Downlink Assignment Index (DAI) value related to an accumulative number of PDCCHs per each serving cell:
 the PUCCH format is determined as PUCCH format 1a/1b based on that the at least one downlink transmission consists of only the first PDCCH and the DAI value is equal to an initial value, and 
 the PUCCH format is determined as PUCCH format 3 based on that the DAI value is greater than the initial value. 
   
     
     
       27. The UE according to the  claim 26 ,
 wherein the plurality of serving cells include a Primary cell (PCell) and at least one Secondary Cell (SCell) are configured for the UE.   
     
     
       28. The UE according to the  claim 27 ,
 wherein the PUCCH format for the ACK/NACK information is determined as the PUCCH format 1a/1b in a second state in which the at least one downlink transmission consists of only one downlink transmission including:   a single PDSCH which is received on the PCell and which is indicated by a corresponding PDCCH, wherein the corresponding PDCCH is received on the PCell and has a DAI value equal to the initial value.   
     
     
       29. The UE according to the  claim 28 ,
 wherein the PUCCH format for the ACK/NACK information is determined as the PUCCH format 1a/1b in a third state in which the at least one downlink transmission consists of only one downlink transmission including:   a single PDSCH which is received on the PCell, and for which a corresponding PDCCH is not received.   
     
     
       30. The UE according to the  claim 26 ,
 wherein a resource for transmitting the ACK/NACK information based on the PUCCH format 3 is indicated based on a Transmit Power Control (TPC) field in the first PDCCH.   
     
     
       31. The UE according to the  claim 30 ,
 wherein the PUCCH format for the ACK/NACK information is determined as the PUCCH format 3 in a fifth state in which the at least one downlink transmission further includes at least:   a second PDSCH received on an SCell among the plurality of serving cells,   wherein a resource for transmitting the ACK/NACK information based on the PUCCH format 3 is indicated based on a TPC field in a second PDCCH which is received on the SCell and which corresponds to the second PDSCH.   
     
     
       32. A non-transitory computer-readable medium storing at least one computer program that, when executed, cause a processor to perform operations to control a User Equipment (UE) to transmit Acknowledgement/Negative Acknowledgement (ACK/NACK) information in a Time Division Duplex (TDD) wireless communication system, the operations comprising:
 determining a Physical Uplink Control Channel (PUCCH) format for transmitting the ACK/NACK information related with at least one downlink transmission; and   transmitting the ACK/NACK information based on the PUCCH format,   wherein the UE is configured with a plurality of serving cells,   wherein, in a first state in which (i) the at least one downlink transmission includes a first Physical Downlink Control Channel (PDCCH) for downlink Semi-Persistent Scheduling (SPS) release, and (ii) the first PDCCH includes a Downlink Assignment Index (DAI) value related to an accumulative number of PDCCHs per each serving cell:
 the PUCCH format is determined as PUCCH format 1a/1b based on that the at least one downlink transmission consists of only the first PDCCH and the DAI value is equal to an initial value, and 
 the PUCCH format is determined as PUCCH format 3 based on that the DAI value is greater than the initial value. 
   
     
     
       33. A method of receiving Acknowledgement/Negative Acknowledgement (ACK/NACK) information from a user equipment (UE) configured with a plurality of serving cells in a Time Division Duplex (TDD) wireless communication system, the method comprising:
 performing at least one downlink transmission; and   receiving the ACK/NACK information related with the at least one downlink transmission based on a Physical Uplink Control Channel (PUCCH) format,   wherein in a first state in which (i) includes a first Physical Downlink Control Channel (PDCCH) for downlink Semi-Persistent Scheduling (SPS) release, and (ii) the first PDCCH includes a Downlink Assignment Index (DAI) value related to an accumulative number of PDCCHs per each serving cell:
 PUCCH format 1a/1b is used for receiving the ACK/NACK information based on that the at least one downlink transmission consists of only the first PDCCH and the DAI value is equal to an initial value, and 
 PUCCH format 3 is used for receiving the ACK/NACK information based on that the DAI value is greater than the initial value. 
   
     
     
       34. The method according to  claim 33 ,
 wherein the plurality of serving cells include a Primary cell (PCell) and at least one Secondary Cell (SCell).   
     
     
       35. The method according to  claim 34 ,
 wherein the PUCCH format for the ACK/NACK information is the PUCCH format 1a/1b in a second state in which the at least one downlink transmission consists of only one downlink transmission including:   a single PDSCH which is transmitted on the PCell and which is indicated by a corresponding PDCCH, wherein the corresponding PDCCH is transmitted on the PCell and has a DAI value equal to the initial value.   
     
     
       36. The method according to  claim 35 ,
 wherein the PUCCH format for the ACK/NACK information is the PUCCH format 1a/1b in a third state in which the at least one downlink transmission consists of only one downlink transmission including:   a single PDSCH which is transmitted on the PCell without a corresponding PDCCH.   
     
     
       37. The method according to  claim 33 ,
 wherein a resource for receiving the ACK/NACK information based on the PUCCH format 3 is indicated based on a Transmit Power Control (TPC) field in the first PDCCH.   
     
     
       38. The method according to  claim 37 ,
 wherein the PUCCH format for the ACK/NACK information is the PUCCH format 3 in a fifth state in which the at least one downlink transmission further includes at least:   a second PDSCH transmitted on an SCell among the plurality of serving cells,   wherein a resource for receiving the ACK/NACK information based on the PUCCH format 3 is indicated based on a TPC field in a second PDCCH which is transmitted on the SCell and which corresponds to the second PDSCH.   
     
     
       39. A Base Station (BS) configured to receive Acknowledgement/Negative Acknowledgement (ACK/NACK) information from a user equipment (UE) configured with a plurality of serving cells in a Time Division Duplex (TDD) wireless communication system, the BS comprising:
 a transmitter and a receiver;   a processor; and   a memory coupled operably connectable to the processor and storing instructions that, when executed, cause the processor to perform operations comprising:   performing through the transmitter, at least one downlink transmission; and   receiving the ACK/NACK information related with the at least one downlink transmission based on a Physical Uplink Control Channel (PUCCH) format,   wherein in a first state in which (i) includes a first Physical Downlink Control Channel (PDCCH) for downlink Semi-Persistent Scheduling (SPS) release, and (ii) the first PDCCH includes a Downlink Assignment Index (DAI) value related to an accumulative number of PDCCHs per each serving cell:
 PUCCH format 1a/1b is used for receiving the ACK/NACK information based on that the at least one downlink transmission consists of only the first PDCCH and the DAI value is equal to an initial value, and 
 PUCCH format 3 is used for receiving the ACK/NACK information based on that the DAI value is greater than the initial value. 
   
     
     
       40. A non-transitory computer-readable medium storing at least one computer program that, when executed, cause a processor to perform operations to control a Base Station (BS) to receive Acknowledgement/Negative Acknowledgement (ACK/NACK) information from a user equipment (UE) configured with a plurality of serving cells in a Time Division Duplex (TDD) wireless communication system, the operations comprising:
 performing at least one downlink transmission; and   receiving the ACK/NACK information related with the at least one downlink transmission based on a Physical Uplink Control Channel (PUCCH) format,   wherein in a first state in which (i) includes a first Physical Downlink Control Channel (PDCCH) for downlink Semi-Persistent Scheduling (SPS) release, and (ii) the first PDCCH includes a Downlink Assignment Index (DAI) value related to an accumulative number of PDCCHs per each serving cell:
 PUCCH format 1a/1b is used for receiving the ACK/NACK information based on that the at least one downlink transmission consists of only the first PDCCH and the DAI value is equal to an initial value, and 
 PUCCH format 3 is used for receiving the ACK/NACK information based on that the DAI value is greater than the initial value.