Method and apparatus for transmitting reception confirmation response of user equipment in wireless communication system

Abstract

A method for transmitting acknowledgement/negative-acknowledgement (ACK/NACK) information of a user equipment (UE) configured with two serving cells including a first serving cell and a second serving cell, the method including receiving two transport blocks (TBs) through a downlink subframe of the first serving cell, receiving one TB through a downlink subframe of the second serving cell and transmitting ACK/NACK information informing ACK/NACKs for the two TBs and the one TB through an uplink subframe of the first serving cell, wherein the ACK/NACK information informs the ACK/NACKs for the two TBs and the one TB by a combination of one resource selected from a plurality of candidate resources and two bits transmitted through the one resource.

What is claimed is: 
     
       1. A method for transmitting acknowledgement/negative-acknowledgement (ACK/NACK) information of a user equipment (UE) configured with two serving cells including a first serving cell and a second serving cell, the method comprising:
 receiving two transport blocks (TBs) through a downlink subframe of the first serving cell;   receiving one TB through a downlink subframe of the second serving cell; and   transmitting ACK/NACK information informing ACK/NACKs for the two TBs and the one TB through an uplink subframe of the first serving cell,   wherein the ACK/NACK information informs the ACK/NACKs for the two TBs and the one TB by a combination of one resource selected from a plurality of candidate resources and two bits transmitted through the one resource, and   wherein:   when the UE is configured with a transmission mode that supports up to two TBs on the second serving cell,   if the one TB is decoded successfully, the UE transmits first ACK/NACK information informing ‘two ACK/NACKs for the two TBs’ and ‘two ACKs for the one TB’ by a first combination of a first resource among the plurality of candidate resources and two bits, wherein the first resource is selected based on the ‘two ACK/NACKs for the two TBs’ and ‘two ACKs for the one TB’, or   if the one TB is not decoded successfully, the UE transmits second ACK/NACK information informing ‘two ACK/NACKs for the two TBs’ and ‘two NACKs for the one TB’ by a second combination of a second resource among the plurality of candidate resources and two bits, wherein the second resource is selected based on the ‘two ACK/NACKs for the two TBs’ and ‘two NACKs for the one TB’.   
     
     
       2. The method of  claim 1 , wherein the first serving cell is a primary cell. 
     
     
       3. The method of  claim 1 , wherein the second serving cell is a secondary cell. 
     
     
       4. The method of  claim 1 , wherein the two bits transmitted through the one resource are modulated by quadrature phase shift keying (QPSK). 
     
     
       5. The method of  claim 1 , wherein the ACK/NACK indicates ACK, NACK or discontinuous transmission (DTX). 
     
     
       6. A user equipment (UE), comprising:
 a transceiver configured to receive and transmit radio signals; and   a processor connected to the transceiver,   wherein the processor is configured to:   control the transceiver to receive two transport blocks (TBs) through a downlink subframe of the first serving cell;   control the transceiver to receive one TB through a downlink subframe of the second serving cell; and   control the transceiver to transmit ACK/NACK information informing ACK/NACKs for the two TBs and the one TB through an uplink subframe of the first serving cell,   wherein the ACK/NACK information informs the ACK/NACKs for the two TBs and the one TB by a combination of one resource selected from a plurality of candidate resources and two bits transmitted through the one resource, and   wherein:   when the UE is configured with a transmission mode that supports up to two TBs on the second serving cell,   if the one TB is decoded successfully, the UE transmits first ACK/NACK information informing ‘two ACK/NACKs for the two TBs’ and ‘two ACKs for the one TB’ by a first combination of a first resource among the plurality of candidate resources and two bits, wherein the first resource is selected based on the ‘two ACK/NACKs for the two TBs’ and ‘two ACKs for the one TB’, or   if the one TB is not decoded successfully, the UE transmits second ACK/NACK information informing ‘two ACK/NACKs for the two TBs’ and ‘two NACKs for the one TB’ by a second combination of a second resource among the plurality of candidate resources and two bits, wherein the second resource is selected based on the ‘two ACK/NACKs for the two TBs’ and ‘two NACKs for the one TB’.   
     
     
       7. The UE of  claim 6 , wherein the first serving cell is a primary cell. 
     
     
       8. The UE of  claim 6 , wherein the second serving cell is a secondary cell. 
     
     
       9. The UE of  claim 6 , wherein the two bits transmitted through the one resource are modulated by quadrature phase shift keying (QPSK). 
     
     
       10. The UE of  claim 6 , wherein the ACK/NACK indicates ACK, NACK or discontinuous transmission (DTX). 
     
     
       11. A method for transmitting acknowledgement/negative-acknowledgement (ACK/NACK) information of a user equipment (UE) configured with two serving cells including a first serving cell and a second serving cell, the method comprising:
 receiving, in a subframe for a downlink, two transport blocks (TBs) associated with the first serving cell;   receiving, in a subframe for the downlink, one TB associated with the second serving cell; and   transmitting ACK/NACK information for the two TBs and the one TB on a physical uplink control channel (PUCCH) resource,   wherein the ACK/NACK information informs ACK/NACKs for the two TBs and the one TB based on the PUCCH resource selected from a plurality of candidate PUCCH resources and two bits transmitted through the PUCCH resource,   wherein the UE is configured with a transmission mode that supports up to two TBs on the second serving cell, and   wherein:   based on the one TB being decoded successfully, the UE transmits first ACK/NACK information informing ‘two ACK/NACKs for the two TBs’ and ‘two ACKs for the one TB’ based on a first PUCCH resource among the plurality of candidate PUCCH resources and two bits, wherein the first PUCCH resource is selected based on the ‘two ACKs for the one TB’, and   based on the one TB being not decoded successfully, the UE transmits second ACK/NACK information informing ‘two ACK/NACKs for the two TBs’ and ‘two NACKs for the one TB’ based on a second PUCCH resource among the plurality of candidate PUCCH resources and two bits, wherein the second PUCCH resource is selected based on the ‘two NACKs for the one TB’.   
     
     
       12. A user equipment (UE), comprising:
 a transceiver configured to receive and transmit radio signals; and a processor connected to the transceiver,   wherein the processor is adapted to:   control the transceiver to receive, in a subframe for a downlink two transport blocks (TBs) associated with a first serving cell;   control the transceiver to receive, in a subframe for the downlink one TB associated with a second serving cell; and   control the transceiver to transmit acknowledgement/negative-acknowledgement (ACK/NACK) information for the two TBs and the one TB on a physical uplink control channel (PUCCH) resource,   wherein the ACK/NACK information informs ACK/NACKs for the two TBs and the one TB based on the PUCCH resource selected from a plurality of candidate PUCCH resources and two bits transmitted through the PUCCH resource,   wherein the UE is configured with a transmission mode that supports up to two TBs on the second serving cell, and   wherein:   based on the one TB being decoded successfully, the UE transmits first ACK/NACK information informing ‘two ACK/NACKs for the two TBs’ and ‘two ACKs for the one TB’ based on a first PUCCH resource among the plurality of candidate PUCCH resources and two bits, wherein the first PUCCH resource is selected based on the ‘two ACKs for the one TB’, and   based on the one TB being not decoded successfully, the UE transmits second ACK/NACK information informing ‘two ACK/NACKs for the two TBs’ and ‘two NACKs for the one TB’ based on a second PUCCH resource among the plurality of candidate PUCCH resources and two bits, wherein the second PUCCH resource is selected based on the ‘two NACKs for the one TB’.   
     
     
       13. The method of  claim 11 , wherein the first PUCCH resource is selected based on the ‘two ACK/NACKs for the two TBs’ and ‘two ACKs for the one TB’. 
     
     
       14. The method of  claim 11 , wherein the second PUCCH resource is selected based on the ‘two ACK/NACKs for the two TBs’ and ‘two NACKs for the one TB’. 
     
     
       15. A method for receiving acknowledgement/negative-acknowledgement (ACK/NACK) information from a user equipment (UE) configured with two serving cells including a first serving cell and a second serving cell, the method performed by a base station and comprising:
 transmitting, in a subframe for a downlink, two transport blocks (TBs) associated with the first serving cell to the UE;   transmitting, in a subframe for the downlink, one TB associated with the second serving cell to the UE which is configured with a transmission mode that supports up to two TBs on the second serving cell; and   receiving ACK/NACK information for the two TBs and the one TB on a physical uplink control channel (PUCCH) resource from the UE,   wherein the ACK/NACK information informs ACK/NACKs for the two TBs and the one TB based on the PUCCH resource and two bits received on the PUCCH resource,   wherein the ACK/NACK information is first ACK/NACK information based on the PUCCH resource being a first PUCCH resource among a plurality of candidate PUCCH resources and two bits received on the first PUCCH resource, the first ACK/NACK information informing ‘two ACK/NACKs for the two TBs’ and ‘two ACKs for the one TB’, and   wherein the ACK/NACK information is second ACK/NACK information based on the PUCCH resource being a second PUCCH resource among the plurality of candidate PUCCH resources and two bits received on the second PUCCH resource, the second ACK/NACK information informing ‘two ACK/NACKs for the two TBs’ and ‘two NACKs for the one TB’.   
     
     
       16. A base station (BS), comprising:
 a transceiver configured to receive and transmit radio signals; and   a processor connected to the transceiver,   wherein the processor is adapted to:   transmit, in a subframe for a downlink, two transport blocks (TBs) associated with the first serving cell to a user equipment (UE);   transmit, in a subframe for the downlink, one TB associated with the second serving cell to the UE which is configured with a transmission mode that supports up to two TBs on the second serving cell; and   receive ACK/NACK information for the two TBs and the one TB on a physical uplink control channel (PUCCH) resource from the UE,   wherein the ACK/NACK information informs ACK/NACKs for the two TBs and the one TB based on the PUCCH resource and two bits received on the PUCCH resource,   wherein the ACK/NACK information is first ACK/NACK information based on the PUCCH resource being a first PUCCH resource among a plurality of candidate PUCCH resources and two bits received on the first PUCCH resource, the first ACK/NACK information informing ‘two ACK/NACKs for the two TBs’ and ‘two ACKs for the one TB’, and   wherein the ACK/NACK information is second ACK/NACK information based on the PUCCH resource being a second PUCCH resource among the plurality of candidate PUCCH resources and two bits received on the second PUCCH resource, the second ACK/NACK information informing ‘two ACK/NACKs for the two TBs’ and ‘two NACKs for the one TB’.