| 摘要 |
A cellular communication system assigns service areas to base stations for a communication service between mobile stations movable over the service areas, and an exchange and control station connects the mobile stations through message channels, the base stations and communication lines to the base stations for the communication service, wherein sets of communication facilities are respectively installed in service sub-areas defined in at least one of the service areas for selectively broadcasting a piece of system information indicative of a special service such as, for example, a limit of mobile stations concurrently communicable with the associated base station in the service sub-areas, thereby economically restricting congestion to a service sub-area.
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