Method for transmitting reference signal to antenna port in wireless access system

摘要

The present invention provides various methods for transmitting a channel state information reference signal (CSI-RS) by varying a transmission period for each antenna port or antenna port group, and also provides apparatuses supporting the methods. The method for receiving a CSI-RS in a wireless access system according to one aspect of the present invention may comprise the steps of: receiving a CSI-RS component information element for setting CSI-RS transmission periods for two or more antenna ports to be mutually different; receiving CSI-RSs for each of the two or more antenna ports based on the CSI-RS component information element; and acquiring channel state information for each of the two or more antenna ports based on the received CSI-RS.

主权项

1. A method for receiving a channel state information reference signal (CSI-RS) in a wireless access system, the method comprising:
receiving a CSI-RS configuration information element to be used for 3 dimensional beamforming, wherein the CSI-RS configuration information element includes antenna set number parameters indicating antenna port groups and CSI-RS subframe configuration parameters indicating different transmission periods of the CSI-RS for each of the antenna port groups; receiving the CSI-RS for the each of the antenna port groups based on the CSI-RS configuration information element; and obtaining a channel state information for the each of the antenna port groups based on the received CSI-RS for the each of the antenna port groups, wherein the each of the antenna port groups has grouped for vertical beamforming and horizontal beamforming of the 3 dimensional beamforming, and wherein the each of the antenna port groups includes two or more antennas.