Patent ID: 8817754
Filing Date: 2014-08-26
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A method for transmitting channel state information-reference signals (CSI-RSs) for 8 or fewer antenna ports at a base station, the method comprising: transmitting the CSI-RSs for the 8 or fewer antenna ports to a user equipment (UE), the CSI-RSs being mapped, according to a predetermined pattern, to a data region of a downlink subframe having a normal cyclic prefix (CP) configuration, wherein the downlink subframe having the normal CP configuration has 14 orthogonal frequency division multiplexing (OFDM) symbols, where an OFDM symbol index starts from 0, wherein the predetermined pattern is defined such that the CSI-RSs for the 8 or fewer antenna ports are mapped, in one resource-block pair, to wherein the two consecutive OFDM symbols are OFDM symbols to which UE-specific reference signals are allowed to be mapped.