Method for transmitting control information and apparatus for same

Abstract

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink channel state information (CSI) in a wireless communication system that supports carrier aggregation, and to an apparatus for the method. The method for reporting CSI in a wireless communication system that supports carrier aggregation comprises the steps of: configuring a plurality of downlink component carriers (DL CCs); setting a CSI report mode on the plurality of DL CCs for each DL CC; and performing an operation for transmitting CSI according to the CSI report mode set on each DL CC. If a P-number of CSI overlap in the same subframe and a first condition is satisfied, a Q-number of CSI among the P-number of CSI are transmitted through a first physical channel, and if the P-number of SCI overlap in the same subframe and a second condition is satisfied, only an R-number of CSI among the P-number of CSI are transmitted through a second physical channel which is different from the first physical channel, wherein R is smaller than Q.

The invention claimed is: 
     
       1. A method for reporting channel state information (CSI) in a wireless communication system that supports carrier aggregation, the method comprising:
 configuring a plurality of downlink component carriers (DL CCs); 
 setting a CSI report mode corresponding to for a respective one of the plurality of DL CCs for each DL CC; and 
 performing an operation for transmitting CSI in accordance with the CSI report mode set corresponding to each DL CC for the respective one of the plurality of DL CCs, 
 wherein, if a P-number of CSIs overlap with one another for the same subframe and a first condition is satisfied, a Q-number of CSIs among the P-number of CSIs are transmitted through a first physical channel, and if the P-number of CSIs overlap with one another for the same subframe and a second condition is satisfied, only an R-number of CSIs among the P-number of CSI are transmitted through a second physical channel which is different from the first physical channel, R being smaller than Q. 
 
     
     
       2. The method according to  claim 1 , wherein the first condition includes that P is equal to or more than M, the second condition includes that P is less than M, P and Q are the same as each other, and M is a minimum number of CSIs allowed for simultaneous transmission through the first physical channel. 
     
     
       3. The method according to  claim 1 , wherein the first condition includes that P is more than L, the second condition includes that P is less than M, P is greater than Q, Q is the same as L, L is a maximum number of CSIs allowed for simultaneous transmission through the first physical channel, and M is a minimum number of CSIs allowed for simultaneous transmission through the first physical channel. 
     
     
       4. The method according to  claim 1 , wherein the first condition includes that a size sum of the P number of CSIs is equal to or more than M, the second condition includes that a size sum of the P number of CSIs is less than M, P is the same as Q, R is a number of CSIs, which has the highest priority among the P number of CSIs and a size sum of CSIs of maximum integer being equal to or less than S, M is a minimum size of CSI allowed for simultaneous transmission through the first physical channel, and S is an integer less than M determined in accordance with capacity of the second physical channel. 
     
     
       5. The method according to  claim 1 , wherein the first condition includes that a size sum of the P number of CSIs is more than L, the second condition includes that a size sum of the P number of CSIs is less than M, P is greater than Q, Q is a number of CSIs, which has the highest priority among the P number of CSIs and a size sum of CSIs of maximum integer being equal to or less than L, R is a number of CSIs, which has the highest priority among the P number of CSIs and a size sum of CSIs of maximum integer being equal to or less than S, L is a maximum size of CSI allowed for simultaneous transmission through the first physical channel, M is a minimum size of CSI allowed for simultaneous transmission through the first physical channel, and S is an integer less than M determined in accordance with capacity of the second physical channel. 
     
     
       6. A communication apparatus configured to report channel state information (CSI) in a wireless communication system that supports carrier aggregation, the communication apparatus comprising:
 a radio frequency (RF) unit; and 
 a processor, 
 wherein the processor configures a plurality of downlink component carriers (DL CCs), sets a CSI report mode corresponding to for a respective one of the plurality of DL CCs for each DL CC; and performs an operation for transmitting CSI in accordance with the CSI report mode set corresponding to each DL CC for the respective one of the plurality of DL CCs, wherein, if a P-number of CSIs overlap with one another for the same subframe and a first condition is satisfied, a Q-number of CSIs among the P-number of CSIs are transmitted through a first physical channel, and if the P-number of CSIs overlap with one another for the same subframe and a second condition is satisfied, only an R-number of CSIs among the P-number of CSI are transmitted through a second physical channel which is different from the first physical channel, R being smaller than Q. 
 
     
     
       7. The communication apparatus according to  claim 6 , wherein the first condition includes that P is equal to or more than M, the second condition includes that P is less than M, P and Q are the same as each other, and M is a minimum number of CSIs allowed for simultaneous transmission through the first physical channel. 
     
     
       8. The communication apparatus according to  claim 6 , wherein the first condition includes that P is more than L, the second condition includes that P is less than M, P is greater than Q, Q is the same as L, L is a maximum number of CSIs allowed for simultaneous transmission through the first physical channel, and M is a minimum number of CSIs allowed for simultaneous transmission through the first physical channel. 
     
     
       9. The communication apparatus according to  claim 6 , wherein the first condition includes that a size sum of the P number of CSIs is equal to or more than M, the second condition includes that a size sum of the P number of CSIs is less than M, P is the same as Q, R is a number of CSIs, which has the highest priority among the P number of CSIs and a size sum of CSIs of maximum integer being equal to or less than S, M is a minimum size of CSI allowed for simultaneous transmission through the first physical channel, and S is an integer less than M determined in accordance with capacity of the second physical channel. 
     
     
       10. The communication apparatus according to  claim 6 , wherein the first condition includes that a size sum of the P number of CSIs is more than L, the second condition includes that a size sum of the P number of CSIs is less than M, P is greater than Q, Q is a number of CSIs, which has the highest priority among the P number of CSIs and a size sum of CSIs of maximum integer being equal to or less than L, R is a number of CSIs, which has the highest priority among the P number of CSIs and a size sum of CSIs of maximum integer being equal to or less than S, L is a maximum size of CSI allowed for simultaneous transmission through the first physical channel, M is a minimum size of CSI allowed for simultaneous transmission through the first physical channel, and S is an integer less than M determined in accordance with capacity of the second physical channel.