Mobile station, and apparatus, system and method for management of emergency calls

A method for management of emergency calls comprising:

• a step wherein a switch monitors the emergency call generation rate which is indicative of the rate of generation of emergency calls in a network;
• a step wherein said switch outputs to a mobile station, on the basis of the result of said monitoring, state information indicative of the restriction state of communication in said network, when said emergency call generation rate attains a preset condition;
• and
• a step wherein said mobile station, on the basis of said state information and emergency number information indicative of preset numbers to be dialed to make emergency calls, transmits to said switch a connection request containing information indicative of a said emergency call, when said restriction state is a state in which only emergency calls are accepted and the number that has been dialed is a number to be dialed to make a said emergency call.

A program for the purpose of executing on a computer a method comprising:

• a step of monitoring the emergency call generation rate which is indicative of the rate of generation of emergency calls in a network;
• a step of outputting to a mobile station, on the basis of the result of said monitoring, state information indicative of the restriction state of communication in said network, when said emergency call generation rate attains a preset condition;
• a step of receiving a connection request containing information indicative of an emergency call, said connection request having been output by said mobile station in response to said state information;
• and
• a step of outputting to said mobile station, on the basis of said connection request, information permitting connection of said mobile station.

A program for the purpose of executing on a computer a method comprising:

• a step of receiving, from a switch, state information indicative of the restriction state of communication in a network;
• a step of determining, on the basis of said state information and emergency number information indicative of preset numbers to be dialed to make emergency calls, when said restriction state is a state in which only said emergency calls are accepted, whether or not the number that has been dialed is a number to be dialed to make a said emergency call;
• and
• a step of transmitting, to said switch, a connection request containing information indicative of a said emergency call, when said dialed number is a number to be dialed to make a said emergency call.