Importance

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Abstract

A mobile radio communication system which autonomously performs frequency allocation and changing for optimum system operation without intervention of a system designer and an operation maintenance engineer. The mobile radio communication system includes radio base stations which communicate by radio with mobile stations and an operation maintenance station which supervises and controls an operation situation of the system. Each of the radio base stations includes reception electric field strength measurement means for measuring reception electric field strengths of the channels of the radio base station, and the operation maintenance station discriminates, from installation position information of the radio base stations and a cluster radius, those radio base stations to which allocation of the same channel as that of a predetermined radio base station is to be inhibited, and allocates a usable channel based on reception electric field strengths measured by the predetermined base station and reception electric field strengths measured by the radio base stations to which allocation of the same channel is inhibited. The operation maintenance means further performs, when there is a radio base station which uses a channel in which the speech quality is lower than a required quality, channel changing or allocating a channel other than the channel in which the speech quality is lower than the require quality.

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First Claim