USRE48327EActiveUtility

Method for transmitting control information and apparatus for same

66
Assignee: LG ELECTRONICS INCPriority: Jun 10, 2011Filed: Jun 11, 2012Granted: Nov 24, 2020
Est. expiryJun 10, 2031(~4.9 yrs left)· nominal 20-yr term from priority
Inventors:Suckchel YangMingyu KimJoonkui AhnDongyoun Seo
H04W 72/23H04L 1/1621H04L 1/1664H04L 1/0068H04L 1/0057H04L 1/0026H04L 1/1671H04W 24/10H04J 11/00H04L 5/001H04L 5/0057H04W 72/042
66
PatentIndex Score
1
Cited by
17
References
30
Claims

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.

Claims

exact text as granted — not AI-modified
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 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,   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 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, 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. 
     
     
       11. A method for a communication apparatus to report 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), and   performing CSI transmission through a physical uplink channel in a time duration where transmission times of CSIs related with at least one of the plurality of DL CCs are overlapped with one another,   wherein based on a total bit size of the CSIs being greater than a reference value, the CSI transmission includes one or more CSIs selected from the CSIs according to a CSI priority rule so that a total bit size of the one or more CSIs is not greater than the reference value.    
     
     
       12. The method of claim 11, wherein based on the total bit size of the CSIs being equal to or less than the reference value, the CSI transmission includes all of the CSIs.  
     
     
       13. The method of claim 11, wherein the physical uplink channel includes a physical uplink control channel (PUCCH).  
     
     
       14. The method of claim 13, wherein the step of performing includes performing fast fourier transforming on the one or more CSIs.  
     
     
       15. The method of claim 11, wherein based on the total bit size of the CSIs being greater than the reference value, the CSI transmission does not include remaining CSI(s) among the CSIs.  
     
     
       16. The method of claim 11, wherein when the time duration is configured for transmission of a scheduling request, a 1-bit scheduling request is transmitted with the one or more CSIs.  
     
     
       17. The method of claim 11, wherein the one or more CSIs includes two or more CSIs.  
     
     
       18. The method of claim 11, wherein the time duration includes a plurality of contiguous orthogonal frequency division multiple access (OFDMA)-based symbols.  
     
     
       19. The method of claim 11, wherein the one or more CSIs have higher CSI priorities than remaining CSI(s) among the CSIs.  
     
     
       20. The method of claim 11, wherein the reference value is a defined user equipment (UE)-specifically based on a radio resource control (RRC) signal.  
     
     
       21. A communication apparatus for use in a wireless communication system that supports carrier aggregation, the communication apparatus comprising:
 a radio frequency (RF) unit configured to receive radio signals through a plurality of downlink component carriers (DL CCs); and   a processor, the processor being connected with the RF unit and configured to perform channel state information (CSI) transmission through a physical uplink channel in a time duration where transmission times of CSIs related with at least one of the plurality of DL CCs are overlapped with one another,   wherein based on a total bit size of the CSIs being greater than a reference value, the CSI transmission includes one or more CSIs selected from the CSIs according to a CSI priority rule so that a total bit size of the one or more CSIs is not greater than the reference value.    
     
     
       22. The communication apparatus of claim 21, wherein based on the total bit size of the CSIs being equal to or less than the reference value, the CSI transmission includes all of the CSIs.  
     
     
       23. The communication apparatus of claim 21, wherein the physical uplink channel includes a physical uplink control channel (PUCCH).  
     
     
       24. The communication apparatus of claim 23, wherein the processor is further configured to perform fast fourier transforming on the one or more CSIs.  
     
     
       25. The communication apparatus of claim 21, wherein based on the total bit size of the CSIs being greater than the reference value, the CSI transmission does not include remaining CSI(s) among the CSIs.  
     
     
       26. The communication apparatus of claim 21, wherein when the time duration is configured for transmission of a scheduling request, a 1-bit scheduling request is transmitted with the one or more CSIs.  
     
     
       27. The communication apparatus of claim 21, wherein the one or more CSIs includes two or more CSIs.  
     
     
       28. The communication apparatus of claim 21, wherein the time duration includes a plurality of contiguous orthogonal frequency division multiple access (OFDMA)-based symbols.  
     
     
       29. The communication apparatus of claim 21, wherein the one or more CSIs have higher CSI priorities than remaining CSI(s) among the CSIs.  
     
     
       30. The communication apparatus of claim 21, wherein the reference value is a defined user equipment (UE)-specifically based on a radio resource control (RRC) signal.

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