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 - 13 . (canceled)  
   
   
       14 . A base station device, located adjacent to a base station using a plurality of frequencies, that shares at least one of the plurality of frequencies, comprising 
 controlling means for performing a soft hand-off process if there is a hand-off from this base station to the adjacent base station when the shared frequency is used, and performing a hard hand-off process between cells using the shared frequency if there is a hand-off from adjacent base station to this base station when a frequency other than the shared frequency is used in the adjacent base station.    
   
   
       15 . A base station that is adjacent to at least first and second base stations, comprising: 
 a wireless unit using a part or all of frequencies used by the first base station as a first shared frequency;    a wireless unit using a part or all of frequencies used by the second base station as a second shared frequency; and    controlling means for performing a soft hand-off using the first shared frequency if there is a hand-off from the first base station to this base station when the first shared frequency is used, performing a soft hand-off using the second shared frequency if there is a hand-off from the second base station to this base station when the second frequency is used, performing a hard hand-off process between cells for switching the frequency from the second shared frequency to the first shared frequency if there is a hand-off from this base station to the first base station when the second shared frequency is used, and performing a hard hand-off process for switching the frequency from the first shared frequency to the shared second frequency if there is a hand-off from this base station to the second base station when the first shared frequency is used.    
   
   
       16 . A base station controller, connected to a plurality of base stations, for performing a soft hand-off with priority if there is a hand-off between the connected base stations and if communications conducted before and after the hand-off are controlled by this base station controller, comprising 
 controlling means for controlling, for at least one of the plurality of base stations, only communications conducted using a part of frequencies used by the at least one of the plurality of base stations, and allocating one of the part of the frequencies if there is a hand-off when a mobile station using a frequency that is not controlled by this base station controller in the at least one of the plurality of base stations moves to an area controlled by another base station to which this base station controller is connected.    
   
   
       17 . A base station device, that is used in a mobile communications system including a first base station device provided in a first wireless communications area to which at least a first frequency is allocated, a second base station device provided in a second wireless communications area to which at least a second frequency is allocated, a first controller accommodating the first base station device and a second controller accommodating the second base station device, and that is provided in a third wireless communications area which is adjacent to the first and second wireless communications areas and to which the first and second frequencies are allocated, wherein 
 data are transmitted to and received from a mobile station using the first frequency under the control of the first controller which manages the first frequency but does not manage the second frequency with respect to this base station; and    data are transmitted to and received from a mobile station using the second frequency under the control of the second controller which manages the second frequency but does not manage the first frequency with respect to this base station.    
   
   
       18 . A base station device, used in a mobile communications system comprising a first base station device provided in a first wireless communications area to which at least a first frequency is allocated, a second base station device provided in a second wireless communications area to which at least a second frequency is allocated and a third base station device provided in a third wireless communications area which is adjacent to the first and second wireless communications areas and to which the first and second frequencies are allocated, that accommodates at least second and third base station devices, comprising: 
 a base station management table for registering base station devices to be controlled for each frequency allocated to corresponding wireless communications area; and    controlling means for controlling the second and third base stations based on information registered in said base station management table.    
   
   
       19 . (canceled)