Method and apparatus for providing channel state information-reference signal (CSI-RS) configuration information in a wireless communication system supporting multiple antennas

摘要

A method for transmitting a Channel State Information-Reference Signal (CSI-RS) from a base station supporting multiple transmit antennas to a mobile station. The method according to one embodiment includes transmitting, at the base station, information of one or more CSI-RS configurations to the mobile station; and transmitting, at the base station, at least one downlink subframe mapped with the CSI-RSs to the mobile station. The one or more CSI-RS configurations include i) at least one CSI-RS configuration for which the mobile station assumes non-zero transmission power for the CSI-RS, ii) at least one CSI-RS configuration for which the mobile station assumes zero transmission power for the CSI-RS, or iii) at least one CSI-RS configuration for which the mobile station assumes non-zero transmission power for the CSI-RS and at least one CSI-RS configuration for which the mobile station assumes zero transmission power for the CSI-RS.

主权项

1. A method for transmitting a Channel State Information-Reference Signal (CSI-RS) from a base station supporting multiple transmit antennas to a mobile station, the method comprising:
transmitting, at the base station, information of one or more CSI-RS configurations to the mobile station; mapping, at the base station, CSI-RSs to resource elements of at least one downlink subframe based on the one or more CSI-RS configurations; and transmitting, at the base station, the at least one downlink subframe mapped with the CSI-RSs to the mobile station, wherein the one or more CSI-RS configurations include:
i) at least one CSI-RS configuration for which the mobile station assumes non-zero transmission power for the CSI-RS,ii) at least one CSI-RS configuration for which the mobile station assumes zero transmission power for the CSI-RS, oriii) at least one CSI-RS configuration for which the mobile station assumes non-zero transmission power for the CSI-RS and at least one CSI-RS configuration for which the mobile station assumes zero transmission power for the CSI-RS, and wherein the CSI-RSs of the at least one CSI-RS configuration for which the mobile station assumes zero transmission power for the CSI-RS are used for an interference measurement of CSI feedback.