Method and apparatus for transmitting reference signal in mobile communication system

A method performed by a base station in a mobile communication system, the method comprising:

• transmitting, to a terminal, first information indicating a mode of a channel state information-reference signal (CSI-RS) as one of an aperiodic mode or a semi-persistent mode, and at least one second information associated with a set of physical downlink shared channel (PDSCH) parameters related to resource element mapping and quasi co-location, the first information and the at least one second information being transmitted by a higher layer signaling;
• transmitting, to the terminal, control information indicating one of the at least one second information;
• and
• transmitting, to the terminal, the CSI-RS according to the mode of the CSI-RS indicated by the first information and a PDSCH based on the indicated second information.

A terminal in a mobile communication system, comprising:

• a transceiver configured to transmit and receive a signal;
• and
• a controller associated with the transceiver and configured to:
• receive, from a base station, first information indicating a mode of a channel state information-reference signal (CSI-RS) as one of an aperiodic mode or a semi-persistent mode, and at least one second information associated with a set of physical downlink shared channel (PDSCH) parameters related to resource element mapping and quasi co-location, the first information and the at least one second information being received by a higher layer signaling,
• receive, from the base station, control information indicating one of the at least one second information, and
• receive, from the base station, the CSI-RS according to the mode of the CSI-RS indicated by the first information and a PDSCH based on the indicated second information.

A base station in a mobile communication system, comprising:

• a transceiver configured to transmit and receive a signal;
• and
• a controller associated with the transceiver and configured to:
• transmit, to a terminal, first information indicating a mode of a channel state information-reference signal (CSI-RS) as one of an aperiodic mode or a semi-persistent mode, and at least one second information associated with a set of physical downlink shared channel (PDSCH) parameters related to resource element mapping and quasi co-location, the first information and the at least one second information being transmitted by a higher layer signaling,
• transmit, to the terminal, control information indicating one of the at least one second information, and
• transmit, to the terminal, the CSI-RS according to the mode of the CSI-RS indicated by the first information and a PDSCH based on the indicated second information.