Method and apparatus for identifier change notification

A computer readable storage medium storing a program of instructions to a computer for executing an identifier change notification method for notifying a communication device of a change of a communication identifier, said computer being capable of communicating with the communication device, said computer including a data storage, said data storage storing a previous identifier and a new identifier in association with each other and history data relating to the previous identifier, said method comprising:

• receiving incoming data transmitted from the communication device;
• acquiring, from the incoming data, both a source identifier capable of identifying a source of the incoming data and a destination identifier capable of identifying a destination of the incoming data;
• acquiring, from the data storage, history data relating to both the previous identifier and the source identifier if the destination identifier matches the previous identifier;
• determining, on the basis of the history data, adequacy of notifying the communication device of the new identifier;
• and
• transmitting notification data including the new identifier to the communication device.

An identifier change notification apparatus for notifying a communication device of a change of a communication identifier, comprising:

• a data storage for storing a previous identifier and a new identifier in association with each other and history data relating to the previous identifier;
• an incoming data receiver for
• receiving incoming data transmitted from the communication device, and
• acquiring, from the incoming data, both a source identifier capable of identifying a source of the incoming data and a destination identifier capable of identifying a destination of the incoming data;
• a history data acquirer for acquiring, from the data storage, history data relating to both the previous identifier and the source identifier if the destination identifier matches the previous identifier;
• a notification adequacy determiner for determining, on the basis of the history data, adequacy of notifying the communication device of the new identifier;
• and
• a notification data transmitter for transmitting notification data including the new identifier to the communication device.