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 and configured to use carrier aggregation in a Time Division Duplex (TDD) wireless communication system, the method comprising:
 receiving, through a higher layer signaling, information regarding a plurality of PUCCH format 3 resources;   receiving at least one downlink transmission comprising at least one Physical Downlink Control Channel (PDCCH) in a subframe set including M subframes, wherein the M is greater than 1; and   transmitting, through a PUCCH, ACK/NACK information related with the at least one downlink transmission,   wherein, based on the UE receiving the at least one PDCCH only on a Primary Cell (PCell):
 based on the at least one PDCCH including only a first PDCCH having a Downlink Assignment Index (DAI) value equal to an initial value: the resource for the PUCCH is determined based on a control channel element (CCE) index of the first PDCCH, and 
 based on the at least one PDCCH including a second PDCCH that has a DAI value greater than the initial value: a resource for the PUCCH, through which the ACK/NACK information is transmitted, is selected from the plurality of PUCCH format 3 resources based on a value of a Transmit Power Control (TPC) field in the second PDCCH. 
   
     
     
       20. The method according to claim 19,
 wherein the at least one PDCCH includes at least one of (i) a PDCCH for scheduling a Physical Downlink Shared Channel (PDSCH) received on the PCell or (ii) a PDCCH indicating downlink Semi Persistent Scheduling (SPS) release.   
     
     
       21. The method according to claim 19, wherein the transmit power for the PUCCH, through which the ACK/NACK information is transmitted, is determined based on a value of the TPC field in the first PDCCH. 
     
     
       22. The method of claim 19, wherein, based on the at least one PDCCH including only the first PDCCH, the PUCCH is transmitted based on PUCCH format 1a/1b. 
     
     
       23. The method according to claim 19,
 wherein the first PDCCH having a DAI value equal to the initial value is a first transmitted PDCCH from the base station in the subframe set.   
     
     
       24. The method according to claim 19,
 wherein, based on the UE receiving the at least one PDCCH not only on the PCell:
 based on the at least one PDCCH including third PDCCH that is received in the subframe set on a Secondary Cell (SCell): a resource of the PUCCH, through which the ACK/NACK information is transmitted, is selected from the plurality of PUCCH format 3 resources based on a value of a TPC field of the third PDCCH received on the SCell. 
   
     
     
       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. The method according to claim 19, wherein based on the UE receiving the at least one PDCCH only on the PCell:
 the DAI is a time-domain index for the at least one PDCCH received in the subframe set on the PCell.   
     
     
       27. A User Equipment (UE) configured to use Physical Uplink Control Channel (PUCCH) format 3 for Acknowledgement/Negative Acknowledgement (ACK/NACK) transmission and configured to use carrier aggregation 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:   receiving, through a higher layer signaling via the receiver, information regarding a plurality of PUCCH format 3 resources;   receiving, via the receiver, at least one downlink transmission comprising at least one Physical Downlink Control Channel (PDCCH) in a subframe set including M subframes, wherein the M is greater than 1; and   transmitting, through a PUCCH via the transmitter, ACK/NACK information related with the at least one downlink transmission,   wherein, based on the UE receiving the at least one PDCCH only on a Primary Cell (PCell):
 based on the at least one PDCCH including only a first PDCCH having a Downlink Assignment Index (DAI) value equal to an initial value: the resource for the PUCCH is determined based on a control channel element (CCE) index of the first PDCCH, and 
 based on the at least one PDCCH including a second PDCCH that has a DAI value greater than the initial value: a resource for the PUCCH, through which the ACK/NACK information is transmitted, is selected from the plurality of PUCCH format 3 resources based on a value of a Transmit Power Control (TPC) field in the second PDCCH. 
   
     
     
       28. The UE according to claim 27,
 wherein the at least one PDCCH includes at least one of (i) a PDCCH for scheduling a Physical Downlink Shared Channel (PDSCH) received on the PCell or (ii) a PDCCH indicating downlink Semi Persistent Scheduling (SPS) release.   
     
     
       29. The UE according to claim 27, wherein the transmit power for the PUCCH, through which the ACK/NACK information is transmitted, is determined based on a value of the TPC field in the first PDCCH. 
     
     
       30. The UE according to claim 29, wherein, based on the at least one PDCCH including only the first PDCCH, the PUCCH is transmitted based on PUCCH format 1a/1b. 
     
     
       31. The UE according to claim 27,
 wherein, based on the UE receiving the at least one PDCCH not only on the PCell:
 based on the at least one PDCCH including third PDCCH that is received in the subframe set on a Secondary Cell (SCell): a resource of the PUCCH, through which the ACK/NACK information is transmitted, is selected from the plurality of PUCCH format 3 resources based on a value of a TPC field of the third PDCCH received on the SCell. 
   
     
     
       32. The UE according to claim 27, wherein based on the UE receiving the at least one PDCCH only on the PCell:
 the DAI is a time-domain index for the at least one PDCCH received in the subframe set on the PCell.   
     
     
       33. 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 and to use carrier aggregation in a Time Division Duplex (TDD) wireless communication system, the operations comprising:
 receiving, through a higher layer signaling, information regarding a plurality of PUCCH format 3 resources;   receiving at least one downlink transmission comprising at least one Physical Downlink Control Channel (PDCCH) in a subframe set including M subframes, wherein the M is greater than 1; and   transmitting, through a PUCCH, ACK/NACK information related with the at least one downlink transmission,   wherein, based on the UE receiving the at least one PDCCH only on a Primary Cell (PCell):
 based on the at least one PDCCH including only a first PDCCH having a Downlink Assignment Index (DAI) value equal to an initial value: the resource for the PUCCH is determined based on a control channel element (CCE) index of the first PDCCH, and 
 based on the at least one PDCCH including a second PDCCH that has a DAI value greater than the initial value: a resource for the PUCCH, through which the ACK/NACK information is transmitted, is selected from the plurality of PUCCH format 3 resources based on a value of a Transmit Power Control (TPC) field in the second PDCCH. 
   
     
     
       34. A method performed by a Base Station (BS) for configuring a User Equipment (UE) to use Physical Uplink Control Channel (PUCCH) format 3 for Acknowledgement/Negative Acknowledgement (ACK/NACK) reception and to use carrier aggregation in a Time Division Duplex (TDD) wireless communication system, the method comprising:
 transmitting, through a higher layer signaling, information regarding a plurality of PUCCH format 3 resources;   transmitting at least one downlink transmission comprising at least one Physical Downlink Control Channel (PDCCH) in a subframe set including M subframes, wherein the M is greater than 1; and   receiving, through a PUCCH, ACK/NACK information related with the at least one downlink transmission,   wherein for a first PDCCH, among the at least one PDCCH, that is transmitted by the BS on a Primary Cell (PCell) and that has a Downlink Assignment Index (DAI) value greater than an initial value, the BS uses a Transmit Power Control (TPC) field in the first PDCCH to indicate a resource of the PUCCH, through which the ACK/NACK information is received, as one of the plurality of PUCCH format 3 resources,   wherein the BS receives the ACK/NACK information through the indicated resource of the PUCCH, and   wherein the DAI is a time-domain index for PDCCHs transmitted in the subframe set on the PCell.   
     
     
       35. The method according to claim 34,
 wherein the at least one PDCCH includes at least one of (i) a PDCCH for scheduling a Physical Downlink Shared Channel (PDSCH) transmitted on the PCell or (ii) a PDCCH indicating downlink Semi Persistent Scheduling (SPS) release.   
     
     
       36. The method according to claim 35,
 wherein, based on the BS transmitting only a second PDCCH as the at least one PDCCH that is transmitted only on the PCell, where the second PDCCH has a DAI value equal to the initial value:
 the BS receives the ACK/NACK information through a resource of the PUCCH that is related with a control channel element (CCE) index of the second PDCCH. 
   
     
     
       37. The method according to claim 36,
 wherein, based on the BS transmitting only the second PDCCH, the PUCCH is received based on PUCCH format 1a/1b.   
     
     
       38. The method according to claim 34,
 wherein for a third PDCCH, among the at least one PDCCH, that is transmitted by the BS in the subframe set on a Secondary Cell (SCell), the BS uses a TPC field in the third PDCCH to indicate the resource of the PUCCH, through which the ACK/NACK information is received, as one of the plurality of PUCCH format 3 resources, and   wherein a value of the TPC field in the third PDCCH is equal to a value of the TPC field in the first PDCCH.   
     
     
       39. A Base Station (BS) that is configured to configure a User Equipment (UE) to use Physical Uplink Control Channel (PUCCH) format 3 for Acknowledgement/Negative Acknowledgement (ACK/NACK) reception and to use carrier aggregation 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 a higher layer signaling via the transmitter, information regarding a plurality of PUCCH format 3 resources;   transmitting, via the transmitter, at least one downlink transmission comprising at least one Physical Downlink Control Channel (PDCCH) in a subframe set including M subframes, wherein the M is greater than 1; and   receiving, through a PUCCH via the receiver, ACK/NACK information related with the at least one downlink transmission,   wherein for a first PDCCH, among the at least one PDCCH, that is transmitted by the BS on a Primary Cell (PCell) and that has a Downlink Assignment Index (DAI) value greater than an initial value, the BS uses a Transmit Power Control (TPC) field in the first PDCCH to indicate a resource of the PUCCH, through which the ACK/NACK information is received, as one of the plurality of PUCCH format 3 resources,   wherein the BS receives the ACK/NACK information through the indicated resource of the PUCCH, and   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 and to use carrier aggregation in a Time Division Duplex (TDD) wireless communication system, the operations comprising:
 transmitting, through a higher layer signaling, information regarding a plurality of PUCCH format 3 resources;   transmitting at least one downlink transmission comprising at least one Physical Downlink Control Channel (PDCCH) in a subframe set including M subframes, wherein the M is greater than 1; and   receiving, through a PUCCH, ACK/NACK information related with the at least one downlink transmission,   wherein for a first PDCCH, among the at least one PDCCH, that is transmitted by the BS on a Primary Cell (PCell) and that has a Downlink Assignment Index (DAI) value greater than an initial value, the BS uses a Transmit Power Control (TPC) field in the first PDCCH to indicate a resource of the PUCCH, through which the ACK/NACK information is received, as one of the plurality of PUCCH format 3 resources,   wherein the BS receives the ACK/NACK information through the indicated resource of the PUCCH, and   wherein the DAI is a time-domain index for PDCCHs transmitted in the subframe set on the PCell.