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 performed by a User Equipment (UE) configured to use Physical Uplink Control Channel (PUCCH) format 3 for Acknowledgement/Negative Acknowledgement (ACK/NACK) transmission in a Time Division Duplex (TDD) wireless communication system, the method comprising:
 determining a PUCCH format for transmitting ACK/NACK information related with at least one downlink transmission that is received in a subframe set including M subframes, wherein the M is greater than 1; and   transmitting the ACK/NACK information based on the PUCCH format,   wherein the PUCCH format for the ACK/NACK information is determined as PUCCH format 1a/1b in a first state in which the at least one downlink transmission consists of only one downlink transmission including:   a single Physical Downlink Shared Channel (PDSCH) which is received on a Primary Cell (PCell) and which is indicated by a corresponding Physical Downlink Control Channel (PDCCH), wherein the corresponding PDCCH is received on the PCell and has a Downlink Assignment Index (DAI) value equal to an initial value, wherein the DAI is a time-domain index for PDCCHs received in the subframe set on the PCell.   
     
     
       20. The method according to claim 19,
 wherein a plurality of serving cells including the PCell and at least one Secondary Cell (SCell) are configured for the UE.   
     
     
       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 PDCCH which indicates downlink Semi-Persistent Scheduling (SPS) release and which is received on the PCell, wherein the single PDCCH 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 22,
 wherein the PUCCH format for the ACK/NACK information is determined as the PUCCH format 3 in a fourth state in which the at least one downlink transmission includes at least:   a first PDSCH which is received on the PCell and which is indicated by a corresponding first PDCCH, wherein the corresponding first PDCCH is received on the PCell and has a DAI value greater than the initial value,   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 corresponding 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 according to claim 24,
 wherein the PCell and the SCell are among a plurality of serving cells, and   wherein for each serving cell, a DAI value is an accumulated counter of PDCCHs that are allocated in the subframe set for the serving cell.   
     
     
       26. A User Equipment (UE) configured to use Physical Uplink Control Channel (PUCCH) format 3 for Acknowledgement/Negative Acknowledgement (ACK/NACK) transmission 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 PUCCH format for transmitting ACK/NACK information related with at least one downlink transmission that is received in a subframe set including M subframes, wherein the M is greater than 1; and   transmitting, through the transmitter, the ACK/NACK information based on the PUCCH format,   wherein the PUCCH format for the ACK/NACK information is determined as PUCCH format 1a/1b in a first state in which the at least one downlink transmission consists of only one downlink transmission including:   a single Physical Downlink Shared Channel (PDSCH) which is received on a Primary Cell (PCell) and which is indicated by a corresponding Physical Downlink Control Channel (PDCCH), wherein the corresponding PDCCH is received on the PCell and has a Downlink Assignment Index (DAI) value equal to an initial value, wherein the DAI is a time-domain index for PDCCHs received in the subframe set on the PCell.   
     
     
       27. The UE according to the claim 26,
 wherein a plurality of serving cells including the 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 PDCCH which indicates downlink Semi-Persistent Scheduling (SPS) release and which is received on the PCell, wherein the single PDCCH 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 29,
 wherein the PUCCH format for the ACK/NACK information is determined as the PUCCH format 3 in a fourth state in which the at least one downlink transmission includes at least:   a first PDSCH which is received on the PCell and which is indicated by a corresponding first PDCCH, wherein the corresponding first PDCCH is received on the PCell and has a DAI value greater than the initial value,   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 corresponding 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 the 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 use Physical Uplink Control Channel (PUCCH) format 3 for Acknowledgement/Negative Acknowledgement (ACK/NACK) transmission in a Time Division Duplex (TDD) wireless communication system, the operations comprising:
 determining a PUCCH format for transmitting ACK/NACK information related with at least one downlink transmission that is received in a subframe set including M subframes, wherein the M is greater than 1; and   transmitting the ACK/NACK information based on the PUCCH format,   wherein the PUCCH format for the ACK/NACK information is determined as PUCCH format 1a/1b in a first state in which the at least one downlink transmission consists of only one downlink transmission including:   a single Physical Downlink Shared Channel (PDSCH) which is received on a Primary Cell (PCell) and which is indicated by a corresponding Physical Downlink Control Channel (PDCCH), wherein the corresponding PDCCH is received on the PCell and has a Downlink Assignment Index (DAI) value equal to an initial value, wherein the DAI is a time-domain index for PDCCHs received in the subframe set on the PCell.   
     
     
       33. A method performed by a Base Station (BS) configuring a User Equipment (UE) to use Physical Uplink Control Channel (PUCCH) format 3 for Acknowledgement/Negative Acknowledgement (ACK/NACK) reception in a Time Division Duplex (TDD) wireless communication system, the method comprising:
 transmitting at least one downlink transmission in a subframe set including M subframes, wherein the M is greater than 1; and   receiving ACK/NACK information related with the at least one downlink transmission based on a PUCCH format,   wherein the PUCCH format for the ACK/NACK information is PUCCH format 1a/1b in a first state in which the at least one downlink transmission consists of only one downlink transmission including:   a single Physical Downlink Shared Channel (PDSCH) which is transmitted on a Primary Cell (PCell) and which is indicated by a corresponding Physical Downlink Control Channel (PDCCH), wherein the corresponding PDCCH is transmitted on the PCell and has a Downlink Assignment Index (DAI) value equal to an initial value, wherein the DAI is a time-domain index for PDCCHs transmitted in the subframe set on the PCell.   
     
     
       34. The method according to claim 33,
 wherein a plurality of serving cells including the PCell and at least one Secondary Cell (SCell) are configured for the UE.   
     
     
       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 PDCCH which indicates downlink Semi-Persistent Scheduling (SPS) release and which is transmitted on the PCell, wherein the single PDCCH 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 36,
 wherein the PUCCH format for the ACK/NACK information is the PUCCH format 3 in a fourth state in which the at least one downlink transmission includes at least:   a first PDSCH which is transmitted on the PCell and which is indicated by a corresponding first PDCCH, wherein the corresponding first PDCCH is transmitted on the PCell and has a DAI value greater than the initial value,   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 corresponding first PDCCH with the DAI value greater than the initial value.   
     
     
       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 configure a User Equipment (UE) to use Physical Uplink Control Channel (PUCCH) format 3 for Acknowledgement/Negative Acknowledgement (ACK/NACK) reception 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:   transmitting, through the transmitter, at least one downlink transmission in a subframe set including M subframes, wherein the M is greater than 1; and   receiving, through the receiver, ACK/NACK information related with the at least one downlink transmission based on a PUCCH format,   wherein the PUCCH format for the ACK/NACK information is PUCCH format 1a/1b in a first state in which the at least one downlink transmission consists of only one downlink transmission including:   a single Physical Downlink Shared Channel (PDSCH) which is transmitted on a Primary Cell (PCell) and which is indicated by a corresponding Physical Downlink Control Channel (PDCCH), wherein the corresponding PDCCH is transmitted on the PCell and has a Downlink Assignment Index (DAI) value equal to an initial value, wherein the DAI is a time-domain index for PDCCHs transmitted in the subframe set on the PCell.   
     
     
       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 configure a User Equipment (UE) to use Physical Uplink Control Channel (PUCCH) format 3 for Acknowledgement/Negative Acknowledgement (ACK/NACK) reception in a Time Division Duplex (TDD) wireless communication system, the operations comprising:
 transmitting at least one downlink transmission in a subframe set including M subframes, wherein the M is greater than 1; and   receiving ACK/NACK information related with the at least one downlink transmission based on a PUCCH format,   wherein the PUCCH format for the ACK/NACK information is PUCCH format 1a/1b in a first state in which the at least one downlink transmission consists of only one downlink transmission including:   a single Physical Downlink Shared Channel (PDSCH) which is transmitted on a Primary Cell (PCell) and which is indicated by a corresponding Physical Downlink Control Channel (PDCCH), wherein the corresponding PDCCH is transmitted on the PCell and has a Downlink Assignment Index (DAI) value equal to an initial value, wherein the DAI is a time-domain index for PDCCHs transmitted in the subframe set on the PCell.