Mobile communications system

Abstract

A base station device 31 provided in a general cell 41 is accommodated in a base station controller 21 , and a base station device 32 provided in a general cell 42 is accommodated in a base station controller 22 . A base station device 33 provided in a boundary cell 43 that is adjacent to both the general cells 41 and 42 is accommodated in both the base station controllers 21 and 22 . Frequencies RF#1 and RF#2 are allocated to each of the general cells 41 and 42 and boundary cell 43 . Communications conducted by the base station device 33 using the frequency RF#1 is controlled by the base station controller 21 , and communications conducted by the base station device 33 using the frequency RF#2 is controlled by the base station controller 22.

1 - 11 . (canceled)  
   
   
       12 . A mobile communications system, comprising: 
 a first base station conducting wireless communications using at least a first frequency;    a second base station conducting wireless communications using at least a second frequency different from the first frequency;    a third base station, located adjacent to said first and second base stations, conducting wireless communications using at least the first and second frequencies;    a first base station controller managing at least the first frequency used in said first and third base stations and the second frequency with respect to said first base station, but does not manage the second frequency with respect to said third base station; and    a second base station controller managing at least the second frequency used in said second and third base stations and the first frequency with respect to said second base station, but does not manage the first frequency with respect to said third base station, wherein    each of said first and second base station controllers further comprises controlling means for allocating the same frequency when there is a hand-off between base station devices managed by the corresponding base station controller.    
   
   
       13 . The mobile communications system according to  claim 12 , wherein 
 each of said first and second base station controllers further comprises instructing means for instructing said first base station to use the first frequency when there is a hand-off from said third base station to said first base station, and instructing said second base station to use the second frequency when there is a hand-off from said third base station to said second base station.    
   
   
       14 - 19 . (canceled)