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

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.

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.

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.