Method for transmitting uplink signals

Abstract

A method of transmitting uplink signals is disclosed. The method includes transmitting, by a user equipment, periodic control information on a Physical Uplink Control Channel (PUCCH) at a predetermined period, dropping the periodic control information and multiplexing uplink signals except the periodic control information when the user equipment is operating in subframe bundling transmission mode where the uplink signals are transmitted in a plurality of consecutive subframes, and transmitting the multiplexed uplink signals on a Physical Uplink Shared Channel (PUSCH).

What is claimed is: 
     
       1. A method for transmitting, by a user equipment, uplink signals, the method comprising:
 transmitting, by a user equipment, first periodic control information on a Physical Uplink Control Channel physical uplink control channel (PUCCH) at a predetermined period when there is no uplink data to be transmitted at a time for transmission of the first periodic control information; and 
 dropping second periodic control information and transmitting first uplink data on a first physical uplink shared channel (PUSCH) when a time for transmission of the first uplink data collides with a time for transmission of the second periodic control information and when the user equipment operates in subframe bundling transmission mode where uplink data is transmitted using a predetermined number of consecutive subframes and when a time for transmission of the periodic control information collides with a time for transmission of the uplink data, dropping the transmission of the periodic control information and transmitting the uplink data except the periodic control information on a Physical Uplink Shared Channel (PUSCH),in which a plurality of subframes are used for uplink data transmission, and 
 wherein the each of the first and second periodic control information includes at least one of a channel quality indication (CQI), a precoding matrix index (PMI), and a rank indication (RI). 
 
     
     
       2. The method of  claim 1 , wherein the predetermined number of consecutive subframes are 4 consecutive subframes along a time axis. 
     
     
       3. A user equipment of transmitting to transmit uplink signals, the user equipment comprising:
 a Radio Frequency (RF) unit; and 
 a processing unit operably connected to the RF unit; and 
 a memory unit operably connected to the processing unit, 
 wherein the processing unit is configured to: 
 control the RF unit to transmit a first periodic control information through the RF unit on a Physical Uplink Control Channel physical uplink control channel (PUCCH) at a predetermined period; when there is no uplink data to be transmitted at a time for transmission of the first periodic control information, 
 drop second periodic control information and control the RF unit to transmit first uplink data on a first physical uplink shared channel (PUSCH) when a time for transmission of the first uplink data collides with a time for transmission of the second periodic control information and when the user equipment operates in subframe bundling transmission mode where a uplink data is transmitted using a predetermined number of consecutive subframes and when a time for transmission of the periodic control information collides with a time for transmission of the uplink data, the processing unit is configured to drop the periodic control information and to control the RF unit to transmit the uplink data except the periodic control information on a Physical Uplink Shared Channel (PUSCH), in which a plurality of subframes are used for uplink data transmission, and 
 wherein the each of the first and second periodic control information includes at least one of a channel quality indication (CQI), a precoding matrix index (PMI), and a rank indication (RI). 
 
     
     
       4. The user equipment of  claim 3 , wherein the predetermined number of consecutive subframes are 4 consecutive subframes along a time axis. 
     
     
       5. The method of claim 1, further comprising:
 transmitting acknowledgement/negative acknowledgement (ACK/NACK) information together with second uplink data on a second PUSCH when a time for transmission of the second uplink data collides with a time for transmission of the ACK/NACK control information and when the user equipment operates in the subframe bundling transmission mode.   
     
     
       6. The user equipment of claim 3, wherein the processing unit is configured to control the RF unit to further transmit acknowledgement/negative acknowledgement (ACK/NACK) information together with second uplink data on a second PUSCH when a time for transmission of the second uplink data collides with a time for transmission of the ACK/NACK control information and when the user equipment operates in the subframe bundling transmission mode. 
     
     
       7. A method for receiving, by a base station, uplink signals, comprising:
 receiving first periodic control information on a physical uplink control channel (PUCCH) from a user equipment when there is no uplink data to be received from the user equipment at a time for reception of the first periodic control information; and   receiving first uplink data without second periodic control information on a first physical uplink shared channel (PUSCH) when a time for reception of the first uplink data collides with a time for reception of the second periodic control information and when the user equipment operates in subframe bundling transmission mode in which a plurality of subframes are used for uplink data reception,   wherein each of the first and second periodic control information includes at least one of a channel quality indication (CQI), a precoding matrix index (PMI) and a rank indication (RI).   
     
     
       8. The method of claim 7, further comprising:
 receiving acknowledgement/negative acknowledgement (ACK/NACK) information together with second uplink data on a second PUSCH when a time for reception of the second uplink data collides with a time for reception of the ACK/NACK control information and when the user equipment operates in the subframe bundling transmission mode.   
     
     
       9. A base station for receiving uplink signals, comprising:
 a radio frequency (RF) unit; and   a processing unit operably connected to the RF unit, wherein the processing unit is configured to:
 control the RF unit to receive first periodic control information on a physical uplink control channel (PUCCH) from a user equipment when there is no uplink data to be received from the user equipment at a time for reception of the first periodic control information; and 
 control the RF unit to receive first uplink data without second periodic control information on a first physical uplink shared channel (PUSCH) when a time for reception of the first uplink data collides with a time for reception of the second periodic control information and when the user equipment operates in subframe bundling transmission mode in which a plurality of subframes are used for uplink data reception, 
   wherein each of the first and second periodic control information includes at least one of a channel quality indication (CQI), a precoding matrix index (PMI) and a rank indication (RI).   
     
     
       10. The base station of claim 9 wherein the processing unit is configured to control the RF unit to further receive acknowledgement/negative acknowledgement (ACK/NACK) information together with second uplink data on a second PUSCH when a time for reception of the second uplink data collides with a time for reception of the ACK/NACK control information and when the user equipment operates in the subframe bundling transmission mode.