Method and apparatus for allocating an uplink carrier for transmitting uplink control information in a wireless communication system

Abstract

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for allocating an uplink carrier for transmitting uplink control information in a wireless communication system that supports carrier aggregation. According to one embodiment of the present invention, a method for transmitting uplink control information in a wireless communication system that supports carrier aggregation of M (M≥1) uplink component carriers comprises: a step of receiving setup information on a primary uplink component carrier, from among said M uplink component carriers, via which one or more pieces of uplink control information are to be transmitted; a step of multiplexing said one or more pieces of uplink control information; and a step of transmitting the multiplexed uplink control information through the primary uplink component carrier.

The invention claimed is: 
     
       1. A method for transmitting uplink control information by a user equipment (UE) being configured with more than one component carrier in a wireless communication system, the method comprising:
 receiving a radio resource control (RRC) signal configuring a primary component carrier on which the uplink control information is to be transmitted through a physical uplink control channel (PUCCH) among the more than one component carrier;  
 multiplexing ACK/NACK information with and a scheduling request (SR); and 
 transmitting, without a simultaneous physical uplink shared channel (PUSCH) transmission in a single subframe same transmission time interval (TTI), the multiplexed information through an uplink primary component carrier among the more than one component carrier the PUCCH, 
 wherein the uplink primary component carrier is an uplink component carrier for transmitting the multiplexed information through a physical uplink control channel (PUCCH) among the more than one component carrier, 
 wherein the transmission of the multiplexed information through the PUCCH is allowed only through on the uplink primary component carrier, and is not allowed through uplink component carriers other than the uplink primary component carrier, and 
 wherein the PUCCH is not simultaneously transmitted along with a physical uplink shared channel (PUSCH) in a single subframe configured by the RRC signal, among the more than one component carrier. 
 
     
     
       2. The method of  claim 1 , wherein the uplink primary component carrier is configured as a UE-specific uplink component carrier. 
     
     
       3. The method of  claim 1 , wherein the ACK/NACK information and the SR are multiplexed and transmitted using one of a PUCCH format 1a, a PUCCH format 1b, or another PUCCH format, and
 wherein the another PUCCH format supports a size greater than a size of the PUCCH format 1a or the PUCCH format 1b. 
 
     
     
       4. The method of  claim 1 , wherein the uplink primary component is configured to the UE through RRC signaling. 
     
     
       5. A user equipment (UE) for transmitting uplink control information in a wireless communication system, the UE being configured with more than one component carrier, the UE comprising:
 a receiving unit;   a transmitting unit; and   a processor,   wherein the processor is configured to:   multiplex ACK/NACK information with a scheduling request (SR), and   transmit, in a single subframe, the multiplexed information through an uplink primary component carrier among the more than one component carrier, by using the transmitting unit,   wherein the uplink primary component carrier is an uplink component carrier for transmitting the multiplexed information through a physical uplink control channel (PUCCH) among the more than one component carrier,   wherein the transmission of the multiplexed information through the PUCCH is allowed only through the uplink primary component carrier, and is not allowed through uplink component carriers other than the uplink primary component carrier, and   wherein the PUCCH is not simultaneously transmitted along with a physical uplink shared channel (PUSCH) in a single subframe.