Mobile communication system, base station device, and its control method

Abstract

A base station (12) includes: an interference signal detection unit (34) for detecting an interference signal which interferers a channel used for communication with a terminal station according to a reception signal; an interference channel information generation unit (36) for generating interference channel information which indicates a channel of the interference signal; and an interference channel information transmission control unit (38) for successively transmitting interference channel information to a base station (12) in the proximity until power of the interference signal detected by the interference signal detection unit (34) is reduced. Furthermore, the base station (12) includes: an interference channel information acquisition unit (40) which acquires interference channel information and judges whether the interference channel information is destined to the local station; a use channel judgment unit (42) which judges whether a channel indicated by the interference channel information destined to the local station is being used; a channel allocation unit (44) which modifies channel allocation.

Description

technical field [0001] The present invention relates to a mobile communication system, a base station device, and a control method thereof, and in particular to a technique for reducing radio wave interference from a terminal station communicating with an adjacent base station (hereinafter referred to as "adjacent base station"). Background technique [0002] In a mobile terminal system using a cell system, by installing a plurality of base stations that limit the reach of radio waves to a certain range, the same frequency can be repeatedly used between base stations. Therefore, each base station sometimes receives radio wave interference from terminal stations communicating with its neighboring base stations. [0003] Specifically, in Figure 8 In the mobile communication system 70 shown, when a terminal station 74-6 communicating with a base station (hereinafter referred to as "adjacent base station") 72-2 adjacent to the base station 72-1 moves to a cell 76-1 of two base ...

AI Technical Summary

Problems solved by technology

[0006] However, in the technology described in the above-mentioned Patent Document 1 and other technologies (for example, adaptive antenna array technology), even if the deterioration of communication quality can be prevented by avoiding radio wave interference, the generation of radio wave interference itself cannot be suppressed.

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