Method and device for transmitting and receiving channel state information in wireless communication system using multiple antennas

Abstract

The present disclosure relates to a method and a device for efficiently transmitting and receiving a periodic channel state report in a wireless communication system supporting multiple antennas. The method by which a terminal transmits channel state information includes receiving control information comprising information associated with channel state reporting on a subband, receiving at least one reference signal and generating, based on the at least one reference signal, periodic channel state information comprising a first precoding matrix indicator (PMI) for a wideband, and transmitting the periodic channel state information comprising the first PMI for the wideband based on the control information associated with channel state reporting on the subband.

1 . A method for transmitting channel state information by a user equipment (UE) in a wireless communication system using multiple antennas, the method comprising:
 receiving control information comprising information associated with channel state reporting on a subband;   receiving at least one reference signal and generating, based on the at least one reference signal, periodic channel state information comprising a first precoding matrix indicator (PMI) for a wideband; and   transmitting the periodic channel state information comprising the first PMI for the wideband based on the control information associated with channel state reporting on the subband.   
     
     
         2 . The method of  claim 1 , wherein the control information denotes radio resource control (RRC) information, and
 wherein the RRC information further comprises configuration information associated with the wireless communication system using multiple antennas.   
     
     
         3 . The method of  claim 1 , wherein the information associated with channel state reporting on the subband comprises a period and an offset for channel quality indicator (CQI) reporting on the subband, and
 wherein a reporting time of the first PMI for the wideband is set based on the period and the offset for the (CQI) reporting on the subband.   
     
     
         4 . The method of  claim 1 , wherein the periodic channel state information further comprises a rank indicator (RI),
 wherein the information associated with channel state reporting on the subband comprises a period and an offset for channel quality indicator (CQI) reporting on the subband, and   wherein a reporting time of the RI is set based on the period and the offset for the CQI reporting on the subband and a period and a relative offset for RI reporting.   
     
     
         5 . The method of  claim 1 , wherein the first PMI for the wideband is a PMI related to some bits of a PMI bit payload. 
     
     
         6 . The method of  claim 1 , wherein subsampling for the channel state reporting on the subband comprises subsampling a codebook by using codebook subsampling applied to a predetermined number of transmit antennas. 
     
     
         7 . A user equipment (UE) in a wireless communication system using multiple antennas, the UE comprising:
 a transceiver; and   a controller couples with the transceiver and configured to:   receive control information comprising information associated with channel state reporting on a subband;   receive at least one reference signal and generating, based on the at least one reference signal, periodic channel state information comprising a first precoding matrix indicator (PMI) for a wideband; and   transmit the periodic channel state information comprising the first PMI for the wideband based on the control information associated with channel state reporting on the subband.   
     
     
         8 . The UE of  claim 7 , wherein the control information denotes radio resource control (RRC) information, and
 wherein the RRC information further comprises configuration information associated with the wireless communication system using multiple antennas.   
     
     
         9 . The UE of  claim 7 ,
 wherein the information associated with channel state reporting on the subband comprises a period and an offset for channel quality indicator (CQI) reporting on the subband, and   wherein the controller is further configured to set a reporting time of the first PMI for the wideband, based on the period and the offset for the CQI reporting on the subband.   
     
     
         10 . The UE of  claim 7 , wherein the periodic channel state information further comprises a rank indicator (RI),
 wherein the information associated with channel state reporting on the subband comprises a period and an offset for channel quality indicator (COI) reporting on the subband, and   wherein the controller is further configured to set a reporting time of the RI based on the period and the offset for the COI reporting on the subband and a period and a relative offset for RI reporting.   
     
     
         11 . The UE of  claim 7 , wherein the first PMI for the wideband is a PMI related to some bits of a PMI bit payload. 
     
     
         12 . The UE of  claim 7 , wherein subsampling for the channel state reporting on the subband comprises subsampling a codebook by using codebook subsampling applied to a predetermined number of transmit antennas. 
     
     
         13 . A method for receiving channel state information by a base station in a wireless communication system using multiple antennas, the method comprising:
 transmitting control information comprising information associated with channel state reporting on a subband;   transmitting at least one reference signal; and   receiving periodic channel state information, comprising a first precoding matrix indicator (PMI) for a wideband, generated based on the at least one reference signal.   
     
     
         14 . (canceled) 
     
     
         15 . (canceled) 
     
     
         16 . The method of  claim 13 , wherein the control information denotes radio resource control (RRC) information, and
 wherein the RRC information further comprises configuration information associated with the wireless communication system using multiple antennas.   
     
     
         17 . The method of  claim 13 , wherein the information associated with channel state reporting on the subband comprises a period and an offset for channel quality indicator (CQI) reporting on the subband, and
 wherein a reporting time of the first PMI for the wideband is set based on the period and the offset for the CQI reporting on the subband.   
     
     
         18 . The method of  claim 13 , wherein subsampling for the channel state reporting on the subband comprises subsampling a codebook by using codebook subsampling applied to a predetermined number of transmit antennas. 
     
     
         19 . A base station in a wireless communication system using multiple antennas, the base station comprising:
 a transceiver; and   a controller coupled with the transceiver and configured to:
 transmit control information comprising information associated with channel state reporting on a subband; 
 transmit at least one reference signal; and 
 receive periodic channel state information, comprising a first precoding matrix indicator (PMI) for a wideband, generated based on the at least one reference signal. 
   
     
     
         20 . The base station of  claim 19 , wherein the control information denotes radio resource control (RRC) information, and
 wherein the RRC information further comprises configuration information associated with the wireless communication system using multiple antennas.   
     
     
         21 . The base station of  claim 19 , wherein the information associated with channel state reporting on the subband comprises a period and an offset for channel quality indicator (CQI) reporting on the subband, and
 wherein a reporting time of the first PMI for the wideband is set based on the period and the offset for the CQI reporting on the subband.   
     
     
         22 . The base station of  claim 19 , wherein subsampling for the channel state reporting on the subband comprises subsampling a codebook by using codebook subsampling applied to a predetermined number of transmit antennas.