Patent ID: 9271295
Filing Date: 2016-02-23
CPC Classification: H04L,H04W

Claim Text:
1. A method of transmitting, by a base station, a reference signal in a mobile communication system, the method comprising: determining at least three scrambling variables, at least one of which is used for generating a demodulation reference signal sequence, comprising a first scrambling variable, a second scrambling variable, and a third scrambling variable, wherein the first scrambling variable, the second scrambling variable, and the third scrambling variable are different from each other; determining whether a demodulation reference signal is for more than or equal to 3-layer transmission; generating, if the demodulation reference signal is for 1 or 2 - layer transmission, the demodulation reference signal sequence using one of the first scrambling variable and the second scrambling variable; generating, if the demodulation reference signal is for more than or equal to 3-layer transmission, the demodulation reference signal sequence using the third scrambling variable; and transmitting the demodulation reference signal sequence through a corresponding antenna port.