Method and device for reducing inter-cell interference of large-scale array antenna base station

The embodiment of the invention provides a method and device for reducing inter-cell interference of a large-scale array antenna base station, and the method comprises the steps: dividing the cells ofthe large-scale array antenna base station into a first subarea and a second subarea according to the azimuth angle information of the cells of the large-scale array antenna base station; equally dividing the working frequency band of the large-scale array antenna base station into a first sub-frequency band and a second sub-frequency band; and preferentially allocating a first sub-band to the user terminal located in the first subarea, and preferentially allocating a second sub-frequency band to the user terminal located in the second subarea. According to the embodiment of the invention, acell in the charge of the large-scale array antenna base station is divided into two subareas; meanwhile, the working frequency band of the cell is divided into virtual sub-frequency bands, the divided subareas of the respecti