Patent ID: 8948109
Filing Date: 2015-02-03
Classification: H04L,H04W

Abstract:
1. A method for transmitting, by a base station (BS), a downlink signal to a user equipment (UE) comprising: allocating data transmission power for downlink data and reference signal (RS) transmission power for at least one UE-specific RS for the downlink data based on a ratio X/Y of data transmission power X to RS transmission power Y; and transmitting the downlink data and the at least one UE-specific RS according to the data transmission power X and the RS transmission power Y to the UE, wherein the data transmission power X is corresponding to power per layer a data resource element (RE) on which the downlink data is mapped, and the RS transmission power Y is corresponding to power per UE-specific RS in a RS RE on which the at least UE-specific RS is mapped, and wherein the ratio X/Y of data transmission power X to RS transmission power Y is predefined to be “1” in case that a number of layers used for transmission of the downlink data is less than or equal to two and predefined to be a specific value less than “1” in case that the number of layers is greater than two.