Device and method for communicating channel state information reference signal (CSI-RS) in wireless communication system

A method for mobile communication by a base station, the method comprising:

• generating first information related to a first type of channel state information reference signal (CSI-RS);
• transmitting the first information to a terminal;
• and
• receiving channel state information based on a measured downlink channel, from the terminal,
• wherein the downlink channel is measured by the terminal using at least one of the first type of CSI-RS transmitted in resource blocks determined based on the first information, and
• wherein the at least one of the first type of CSI-RS is transmitted in one of even index resource blocks or odd index resource blocks.

A terminal for mobile communication, the terminal comprising:

• a transceiver;
• and
• a controller configured to:
• receive first information related to a first type of channel state information reference signal (CSI-RS), from a base station,
• determine resource blocks in which at least one of the first type of CSI-RS is transmitted based on the first information, the at least one of the first type of CSI-RS is transmitted in one of even index resource blocks or odd index resource blocks,
• measure a downlink channel using the at least one of the first type of CSI-RS received in the determined resource blocks, and
• transmit channel state information based on the measured downlink channel, to the base station.

A base station for mobile communication, the base station comprising:

• a transceiver;
• and
• a controller configured to:
• generate first information related to a first type of channel state information reference signal (CSI-RS),
• transmit the first information to a terminal, and
• receive channel state information based on a measured downlink channel, from the terminal,
• wherein the downlink channel is measured by the terminal using at least one first type of CSI-RS transmitted in resource blocks determined based on the first information, and
• wherein the at least one of the first type of CSI-RS is transmitted in one of even index resource blocks or odd index resource blocks.