Method and apparatus for transmitting and receiving reference signal for sidelink channel state information acquisition

Abstract

Methods and apparatuses are provided for transmitting/receiving a reference signal for sidelink channel state information acquisition. In particular, a method of a transmitter UE is provided for transmitting a reference signal in order to acquire sidelink channel state information. The method may include: receiving enabling information of sidelink channel state information (CSI) reporting, determining whether to transmit a sidelink channel state information reference signal (SL CSI-RS) based on the enabling information of the CSI reporting, and transmitting the SL CSI-RS within a resource assigned for physical sidelink shared channel (PSSCH) transmission to the a receiver UE.

What is claimed is: 
     
         1 . A method of a transmitter user equipment (Tx UE) for transmitting a reference signal for sidelink channel state information acquisition, the method comprising:
 receiving enabling information of channel state information (CSI) reporting;   determining whether to transmit a sidelink channel state information reference signal (SL CSI-RS) based on the enabling information of the CSI reporting; and   transmitting the SL CSI-RS to a receiver user equipment (Rx UE) within a resource assigned for physical sidelink shared channel (PSSCH) transmission.   
     
     
         2 . The method according to  claim 1 , wherein the transmission of the SL CSI-RS is indicated as a value of a CSI request field included in a sidelink control information format (SCI format). 
     
     
         3 . The method according to  claim 1 , wherein the enabling information of the CSI reporting is received by higher layer signaling. 
     
     
         4 . The method according to  claim 1 , wherein the SL CSI-RS is transmitted based on a first symbol in a resource block that is used to transmit the SL CSI-RS and frequency resource allocation information, which are configured by higher layer signaling, within a resource assigned for PSSCH transmission. 
     
     
         5 . A method of a receiver user equipment (Rx UE) for receiving a reference signal for sidelink channel state information acquisition, the method comprising:
 receiving, from a transmitter user equipment (Tx UE), a sidelink channel state information reference signal (SL CSI-RS), which has been determined to be transmitted based on enabling information of channel state information (CSI) reporting, within a resource assigned for PSSCH transmission; and   performing the CSI reporting based on the received SL CSI-RS.   
     
     
         6 . The method according to  claim 5 , wherein the transmission of the SL CSI-RS is indicated as a value of a CSI request field included in a sidelink control information format (SCI format). 
     
     
         7 . The method according to  claim 5 , wherein the enabling information of the CSI reporting is received by higher layer signaling. 
     
     
         8 . The method according to  claim 5 , wherein the SL CSI-RS is received based on a first symbol in a resource block that is used to transmit the SL CSI-RS and frequency resource allocation information, which are configured by higher layer signaling, within a resource assigned for PSSCH transmission. 
     
     
         9 . A transmitter user equipment (Tx UE) for transmitting a reference signal for sidelink channel state information acquisition, the Tx UE comprising:
 a receiver receiving enabling information of channel state information (CSI) reporting;   a controller determining whether to transmit a sidelink channel state information reference signal (SL CSI-RS) based on the enabling information of the CSI reporting; and   a transmitter transmitting the SL CSI-RS to a receiver user equipment (Rx UE) within a resource assigned for physical sidelink shared channel (PSSCH) transmission.   
     
     
         10 . The Tx UE according to  claim 9 , wherein the transmission of the SL CSI-RS is indicated as a value of a CSI request field included in a sidelink control information format (SCI format). 
     
     
         11 . The Tx UE according to  claim 9 , wherein the enabling information of the CSI reporting is received by higher layer signaling. 
     
     
         12 . The Tx UE according to  claim 9 , wherein the SL CSI-RS is transmitted based on a first symbol in a resource block that is used to transmit the SL CSI-RS and frequency resource allocation information, which are configured by higher layer signaling, within a resource assigned for PSSCH transmission.