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

A method of a receiving equipment for reporting sidelink channel state information (CSI), the method comprising:

• receiving, from a transmitting equipment, information indicating to report the sidelink CSI through a sidelink control information (SCI) format;
• receiving, from the transmitting equipment, sidelink CSI reference signal (RS) in association with the information indicating to report the sidelink CSI;
• and
• performing sidelink CSI reporting based on the received sidelink CSI RS,
• wherein the sidelink CSI RS is received within a resource assigned for a physical sidelink shared channel (PSSCH) transmission,
• wherein the sidelink CSI RS is received by the receiving equipment only if enabling information of the sidelink CSI reporting is received by the transmitting equipment,
• wherein the SCI format includes a specific value in a field for the information indicating to report the sidelink CSI,
• wherein a specific higher layer parameter is used for acquiring the sidelink CSI,
• wherein the sidelink CSI RS is received based on configuration information by a higher layer signaling, and
• wherein the configuration information relates to a first parameter indicating a first orthogonal frequency division multiplexing (OFDM) symbol in a physical resource block (PRB) used for the sidelink CSI RS and a second parameter indicating a number of antenna ports and a frequency domain allocation for the sidelink CSI RS.

A transmitting equipment for acquiring sidelink channel state information (CSI), the transmitting equipment comprising:

• a transmitter configured to transmit information indicating to report the sidelink CSI through a sidelink control information (SCI) format, and transmit sidelink CSI reference signal (RS) in association with the information indicating to report the sidelink CSI, to a receiving equipment;
• a receiver configured to receive sidelink CSI reporting from the receiving equipment;
• and
• a controller configured to acquire the sidelink CSI based on the sidelink CSI reporting,
• wherein the sidelink CSI RS is transmitted within a resource assigned for a physical sidelink shared channel (PSSCH) transmission,
• wherein the sidelink CSI RS is transmitted to the receiving equipment only if enabling information of the sidelink CSI reporting is received by the transmitting equipment,
• wherein the SCI format includes a specific value in a field for the information indicating to report the sidelink CSI,
• wherein a specific higher layer parameter is used for acquiring the sidelink CSI,
• wherein the sidelink CSI RS is transmitted based on configuration information by a higher layer signaling, and
• wherein the configuration information relates to a first parameter indicating a first orthogonal frequency division multiplexing (OFDM) symbol in a physical resource block (PRB) used for the sidelink CSI RS and a second parameter indicating a number of antenna ports and a frequency domain allocation for the sidelink CSI RS.