Switching station, subscriber location information registration method, subscriber service information acquisition method, subscriber service information registration method, and subscriber service information transmission method

Abstract

A switching station etc., are provided. When a mobile station moves from an area of a switching station into an area of another switching station having a VLR which has accepted the maximum number of subscribers, the switching station registers subscriber location information about the mobile station in an HLR even through it cannot register the subscriber service information in its VLR. When a call origination signal is transmitted from the mobile station, the switching station performs call origination connection processing by acquiring the subscriber service information about the mobile station from the HLR. When call termination to the mobile station occurs, the switching station can perform call termination processing normally since the subscriber location information is correctly updated in the HLR. The switching station performs call termination processing by acquiring the subscriber service information from the HLR.

1 . A switching station comprising: 
 means for receiving a call termination signal to a mobile station; and    means for acquiring, when the call termination signal is received, subscriber service information about the mobile station designated as a destination of the call termination signal from a second management unit managing subscriber information in a case where the subscriber service information about the mobile station designated as the destination of the call termination signal is not registered in a first management unit provided for use with the switching station and managing subscriber information.    
   
   
       2 . The switching station as claimed in  claim 1 , wherein said first management unit is a VLR.  
   
   
       3 . The switching station as claimed in  claim 1 , wherein said second management unit is an HLR.  
   
   
       4 . A switching station comprising: 
 means for receiving a call termination signal to a mobile station; and    means for acquiring, when the call termination signal is received, subscriber service information about the mobile station designated as a destination of the call termination signal from a management unit provided for use with another switching station and managing subscriber information in a case where the subscriber service information about the mobile station designated as the destination of the call termination signal is not registered in a management unit provided for use with the switching station and managing subscriber information.    
   
   
       5 . The switching station as claimed in  claim 4 , wherein said management unit is a VLR.  
   
   
       6 . A subscriber service information acquisition method comprising the steps of: 
 receiving, at a switching station, a call termination signal to a mobile station; and    acquiring, at the switching station, when the call termination signal is received, subscriber service information about the mobile station designated as a destination of the call termination signal from a second management unit managing subscriber information in a case where the subscriber service information about the mobile station designated as the destination of the call termination signal is not registered in a first management unit provided for use with the switching station and managing subscriber information.    
   
   
       7 . A subscriber service information acquisition method comprising the steps of: 
 receiving, at a first switching station, a call termination signal to a mobile station; and    acquiring, at the first switching station, when the call termination signal is received, subscriber service information about the mobile station designated as a destination of the call termination signal from a management unit provided for use with a second switching station and managing subscriber information in a case where the subscriber service information about the mobile station designated as the destination of the call termination signal is not registered in a management unit provided for use with the first switching station and managing subscriber information.