Method for coordinating interference in an uplink interference channel for a terminal in a wireless communication system

摘要

Provided are an interference mitigation method and a base station device in a wireless communication system. The interference mitigation method to be performed by a base station comprises a step in which a serving base station measures interference from a terminal that belongs to a neighboring cell; a step of determining a beamforming vector of the neighboring cell on the basis of the measured interference; a step of transmitting the beamforming vector of the neighboring cell to a base station of the neighboring cell; and a step of feeding back, to a terminal that belongs to a serving cell, the beamforming vector of the serving base station determined on the basis of the beamforming vector of the neighboring cell.

主权项

1. A method for reducing interference at a base station in a wireless communication system, the method comprising:
performing an interference alignment algorithm iteratively until a first beamforming vector and a second beamforming vector are satisfied with a predetermined condition; in response to the predetermined condition being satisfied, transmitting the second beamforming vector to a user equipment belonging to a serving cell; and measuring an interference channel based on interference from a user equipment belonging to a neighboring cell at a serving base station, wherein the performing the interference alignment algorithm iteratively comprises performing all of the following, one or more times, until the first beamforming vector and the second beamforming vector are satisfied with the predetermined condition:
receiving a beamforming vector of the user equipment belonging to the neighboring cell from the neighboring cell;determining the first beamforming vector of the serving cell for minimizing an interference signal power based on the measured interference channel and the received beamforming vector;determining the second beamforming vector of a user equipment belonging to the serving base station for maximizing a desired signal power based on an uplink channel of the user equipment belonging to the serving base station and the first beamforming vector; andtransmitting the second beamforming vector to a base station of the neighboring cell.