Patent ID: 9628234
Date: 2017-04-18
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method for transmitting, by a base station, reference signals (RSs), the method comprising: transmitting, by the base station, configuration information of second type RSs; transmitting, by the base station, first type RSs in each of a plurality of first type subframes; and transmitting, by the base station, the first type RSs and the second type RSs in each of one or more second type subframes based on the configuration information; wherein the configuration information includes information indicating which subframe is the one or more second type subframes in which the second type RSs are transmitted, wherein the first type RSs are present in a first part of a plurality of OFDM symbols in each of the first and second type subframes, and wherein the second type RSs are present in a second part of the plurality of OFDM symbols in each of the one or more second type subframes.