Patent ID: 9287905
Filing Date: 2016-03-15
CPC Classification: H04B,H04L

Claim Text:
1. A method for transmitting a channel state information reference signal (CSI-RS) by a base station, the method comprising: selecting a CSI-RS pattern including a first set of resource elements (REs); selecting a muting pattern including a second set of REs; transmitting an indicator indicating the muting pattern among a plurality of predefined muting patterns and period information applied to the muting pattern via higher layer signaling; mapping data symbols and the CSI-RS to REs based on the CSI-RS pattern and the muting pattern; and transmitting the data symbols and the CSI-RS to a user equipment (UE), wherein the data symbols are mapped to REs that are not included in the CSI-RS pattern and the muting pattern, wherein the muting pattern is selected among the plurality of predefined muting patterns and the plurality of predefined muting patterns are included in a set of CSI-RS pattern candidates, and wherein the indicator comprises a plurality of bits corresponding to the plurality of predefined muting patterns.