Patent ID: 7096028

Claim:
A mobile communication system comprising: a mobile terminal capable of designating a communication quality in requesting communication; a radio base station connected to said mobile terminal through a radio channel; and a radio network controller connected to said radio base station to control the communication quality between said mobile terminal and said radio base station, wherein said radio network controller comprises a communication request reception determination unit for, upon receiving a communication request which designates the communication quality from said mobile terminal, determining whether the received communication request is to be received, on the basis of a communication quality provided to communication which requests without communication quality, wherein: said communication quality is based on an error rate in said radio channel between said mobile terminal and said radio base station, said radio network controller further comprises a communication quality measurement unit for measuring a communication quality Q provided to communication which requests without communication quality, and said communication request reception determination unit comprises: comparison means for, upon receiving the communication request which designates the communication quality, comparing the measured communication quality Q output from said communication quality measurement unit with a predetermined threshold value, bandwidth setting means for re-setting an allowable communication bandwidth on the basis of a comparison result from said comparison means, and determination means for determining whether the communication request is to be received, on the basis of a bandwidth required by the received communication request and the allowable communication bandwidth re-set by said bandwidth setting means, wherein: when the measured communication quality Q is higher than a first threshold value QH, said bandwidth setting means increases the allowable communication bandwidth by a first predetermined value to re-set a new allowable communication bandwidth, and when the measured communication quality Q is lower than a second threshold value QL (QL<QH), said bandwidth setting means decreases the allowable communication bandwidth by a second predetermined value to re-set a new allowable communication bandwidth, and when the bandwidth required by the received communication request falls within the re-set allowable communication bandwidth, said determination means permits to receive the communication request, and when the bandwidth required by the received communication request falls outside the re-set allowable communication bandwidth, said determination means denies to receive the communication request.