Method and apparatus for transmitting feedback information to terminal in wireless communication system using CoMP transmission

摘要

The present invention relates to a wireless communication system having at least one base station utilizing CoMP (Coordinated Multi-Point) transmission, wherein a terminal receives a reference signal from said at least one base station. If said at least one base station makes a transmission based on said reference signal through Coordinated beamforming (CB), information based on PMI (Precoding Matrix Index) corresponding to each base station is determined. Accordingly, if said at least one base station makes a transmission based on joint processing, phase set information is determined for phase correction of the formed beam. Thus, the present method transmits feedback information, comprising PMI set information based on CB and said phase set information, from said at least one base station to a server base station.

主权项

1. A method for transmitting feedback information by a user equipment (UE) in a wireless communication system in which at least one eNode B (eNB) performs a coordinated multi-point (CoMP) operation, the method comprising:
receiving a reference signal from the at least one eNB; determining precoding matrix index (PMI) set information corresponding to the at least one eNB when the at least one eNB is operated in a coordinated beamforming (CB) scheme based upon the reference signal; determining phase set information for phase correction of beams formed by the at least one eNB when the at least one eNB is operated in a joint processing (JP) scheme basis upon the PMI set information of the CB scheme; and transmitting feedback information including the PMI set information of the CB scheme and the phase set information to a serving eNB from among the at least one eNB, wherein the feedback information is used in a case in which the at least one eNB is operated by the CB scheme and in another case in which the at least one eNB is operated by the JP scheme.