Next, the base station according to one embodiment of the present invention is described with reference to FIG. 6. In this embodiment, the base station 200 is mainly described from the standpoint of the camped base station 200A, but the description below of the base station 200 can be similarly applied to the adjacent base station 200B. FIG. 6 is a block diagram for illustrating an arrangement of the base station according to one embodiment of the present invention.

As illustrated in FIG. 6, the base station 200 has a transmission and reception unit 210, an interference information acquisition unit 220 and a transmission control unit 230.

The transmission and reception unit 210 indicates an interference beam candidate list including directional beams transmitted from the camped base station 200A and interference beam candidates transmitted from the adjacent base station 200B to the user equipment 100 and transmits reference signals in directional beams in the interference beam candidate list. The camped base station 200A requests the adjacent base station 200B to indicate directional beams from the adjacent base station 200B that may interfere with the resident user equipment 100 and receives a list of interference beam candidates from the adjacent base station 200B. For example, the adjacent base station 200B may indicate a directional beam transmitted toward the camped base station 200A as the interference beam candidate to the camped base station 200A.