Method and apparatus for transmitting a reference signal in a wireless communication system

Abstract

An uplink transmission method in a wireless communication system, and a user equipment (UE) therefore, are discussed. The method includes, for example, generating uplink control information (UCI) which includes at least one of a hybrid automatic repeat request (HARQ) acknowledgement (ACK)/negative-acknowledgement (NACK) signal, a channel quality indicator (CQI) and a scheduling request (SR); generating a reference signal (RS) based on one or more indices selected from among a set {0, 3, 6, 8, 10}; transmitting the UCI on a physical uplink control channel (PUCCH); and transmitting the generated RS for the PUCCH based on the selected one or more indices.

What is claimed is: 
     
       1. An uplink transmission method in a wireless communication system, the method comprising:
 generating, by a user equipment (UE), uplink control information (UCI) which includes at least one of comprises a hybrid automatic repeat request (HARQ) acknowledgement (ACK)/negative-acknowledgement (NACK) signal, a channel quality indicator (CQI) and a scheduling request (SR); 
 generating, by the UE, a reference signal (RS) based on one or more indices selected from among a set {0, 3, 6, 8, 10}; 
 transmitting, by the UE and to a base station (BS), the UCI on a physical uplink control channel (PUCCH); and 
 transmitting, by the UE and to the BS, the generated RS for the PUCCH based on the selected one or more indices. 
 
     
     
       2. The method of  claim 1 , wherein the RS is transmitted to the BS on second and sixth orthogonal frequency division multiplexing (OFDM) symbols among 7 OFDM symbols in one slot. 
     
     
       3. The method of  claim 1 , further comprising:
 generating, by the UE, a base sequence for the RS; and 
 cyclically shifting, by the UE, the base sequence based on the one or more indices selected from the set {0, 3, 6, 8, 10}. 
 
     
     
       4. The method of  claim 1 , further comprising:
 receiving, by the UE from the BS, a resource configuration including information regarding a plurality of resource candidates. 
 
     
     
       5. The method of  claim 4 , further comprising:
 receiving, by the UE from the BS, information indicating a resource index among the plurality of resource candidates; and 
 determining, by the UE, a cyclic shift index according to the resource index. 
 
     
     
       6. The method of  claim 5 , wherein the HARQ ACK/NACK signal is spread to an orthogonal sequence, and
 wherein an orthogonal sequence index for identifying the orthogonal sequence is determined on the basis of the resource index. 
 
     
     
       7. A user equipment for performing an uplink transmission in a wireless communication system, the user equipment comprising:
 a transceiver configured to transmit and receive a radio signal; and 
 a processor operatively coupled to the transceiver and configured to:
 generate uplink control information (UCI) which includes at least one of comprises a hybrid automatic repeat request (HARQ) acknowledgement (ACK)/negative-acknowledgement (HACK)  (NACK) signal, a channel quality indicator (CQI) and a scheduling request (SR), 
 generate a reference signal (RS) based on one or more indices selected from among a set {0, 3, 6, 8, 10}, 
 
 control the transceiver to transmit, to a base station (BS), the UCI on a physical uplink control channel (PUCCH), and 
 control the transceiver to transmit, to the BS, the generated RS for the PUCCH based on the selected one or more indices. 
 
     
     
       8. The user equipment of  claim 7 , wherein the RS is transmitted on second and sixth orthogonal frequency division multiplexing (OFDM) symbols among 7 OFDM symbols in one slot. 
     
     
       9. The user equipment of  claim 7 , wherein the processor is further configured to:
 generate a base sequence for the RS; and 
 cyclically shift the base sequence based on the one or more indices selected from the set {0, 3, 6, 8, 10}. 
 
     
     
       10. The user equipment of  claim 7 , wherein the processor is further configured to:
 control the transceiver to receive, from the BS, a resource configuration including information regarding a plurality of resource candidates. 
 
     
     
       11. The user equipment of  claim 10 , wherein the processor is further configured to:
 control the transceiver to receive, from the BS, information indicating a resource index among the plurality of resource candidates; and 
 determine a cyclic shift index according to the resource index. 
 
     
     
       12. The user equipment of  claim 11 , wherein the HARQ ACK/NACK signal is spread to an orthogonal sequence, and
 wherein an orthogonal sequence index for identifying the orthogonal sequence is determined on the basis of the resource index. 
 
     
     
       13. The method of claim 1, wherein the UCI further comprises a channel quality indicator (CQI).  
     
     
       14. The method of claim 1, wherein the UCI further comprises a scheduling request (SR).  
     
     
       15. The user equipment of claim 7, wherein the UCI further comprises a channel quality indicator (CQI).  
     
     
       16. The user equipment of claim 7, wherein the UCI further comprises a scheduling request (SR).