Importance

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Abstract

In a radio channel assignment method in a mobile telecommunication system having a plurality of radio base stations and a base station control unit for controlling each of the radio base stations, the base station control unit assigns a radio channel to a mobile station when radio communication is performed, and each radio base station has frequencies shared as radio frequencies with the other radio base stations. When the mobile station, which is communicating using a predetermined radio channel from among a plurality of radio channels in which a shared frequency is employed as radio frequency, moves into an area of another radio base station, the base station control unit confirms status of use of other radio channels than the predetermined radio channel in the shared frequency and assigns to the mobile station a radio channel, which has been in use thus far, as the radio channel in the area of the other radio base station if all of the other radio channels are idle.

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First Claim