Patent ID: 9226247
Filing Date: 2015-12-29
Classification: H04B,H04L,H04W

Abstract:
1. A method of determining an uplink transmission power by a user equipment in a macro cell environment that includes at least one remote radio head (RRH), the method comprising the steps of: receiving, from a base station, channel state information-reference signal (CSI-RS) configuration information and CSI-RS transmission power information of the base station and the at least one RRH, wherein the CSI-RS transmission power information includes a CSI-RS transmission power level of the base station and the at least one RRH, the CSI-RS transmission power of the base station is an absolute value level and the transmission power of the at least one RRH corresponds to a difference value with the CSI-RS power of the base station; measuring a signal strength of CSI-RS received from the at least one RRH; and estimating a downlink path loss that corresponds to a node that is set as a reception point or a reception RRH by using the signal strength of the received CSI-RS, the CSI-RS configuration information and the CSI-RS transmission power information, determining an uplink transmission power, to be transmitted to the node set as the reception point or the reception RRH, based on the estimated downlink path loss; and transmitting an uplink signal to the node set as the reception point or the reception RRH by using the determined uplink transmission power.