REFERENCE SIGNAL TRANSMITTING METHOD, A DEVICE THEREOF, AN UPLINK TRANSMITTING METHOD, AND A DEVICE THEREOF CAPABLE OF EFFICIENTLY CONTROLLING UPLINK TRANSMISSION POWER IN A COMP SYSTEM

摘要

PURPOSE: A reference signal transmitting method, a device thereof, an uplink transmitting method, and a device thereof are provided to control uplink transmission power by considering the path reduction of each multi transmission point by using a reference signal transmitted from the multi transmission point in a CoMP(Cooperative Multi Points Transmission and Receptions) system.;CONSTITUTION: A terminal receives information about CSI-RS(Channel State Information-Reference Signal) settings from a BS(Base Station)(S810). The terminal receives information about a DL(DownLink) physical channel from each transmission point of a CoMP cooperative group(S820). The terminal estimates UL(UpLink) path reduction based on CSI-RS and calculates a PMI(Precoding Matrix Indicator)(S830). The terminal applies the calculated UL path reduction to control UL transmission power(S840).;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Start; (BB) End; (S810) Receive CSI-RS setting information; (S820) Receive information on a downlink physical channel; (S830) Calculate a path loss and a PMI; (S840) Adjust uplink transmission power; (S850) Perform uplink transmission