Apparatus and method for reducing interferences between base stations in wireless communication system

摘要

A method for reducing interferences between base stations in a communication system having a plurality of base stations. This method comprises the steps of: causing a user station to receive both a signal transmitted by a local-cell base station and a signal transmitted by an adjacent-cell base station, thereby measuring the SNR of the interfered link and the SNR of the leak link of the adjacent-cell base station; calculating a weighting factor of a leak power based on the measured SNR of the interfered link and the measured SNR of the leak link of the adjacent-cell base station; and determining, based on the calculated weighting factor, whether or not the leak power has to be suppressed and to what degree such suppression has to be performed.

主权项

1. A method of reducing interference between base stations in a communication system with a plurality of base stations, the method comprising:
a user station receiving signals transmitted from a base station in a subject cell and a base station in a neighboring cell and thereby measuring, at a processor of the user station, a signal to noise ratio (SNR) of an interfered link and an SNR of a leak link of the neighboring cell base station; calculating, at the processor of the user station, a weighting coefficient of leak power of each base station based on the measured SNR of the interfered link and the measured SNR of the leak link, the leak power being used for calculating a signal to leak and noise ratio (SLNR) of each base station; determining, at a processor of each base station, whether or not the leak power needs to be suppressed based on the calculated weighting coefficient; and calculating, at the processor of each base station, a precoding vector which maximizes the SLNR calculated using the leak power suppressed based on the determining result.