Method of and system for setting up a telephone call

A system for setting up a telephone connection for a telephone call, the system comprising:

• a mobile switching center,
• a service control point and
• an emergency center associated with said mobile switching center, wherein:
• said mobile switching center being arranged to:
• set up said telephone connection for said telephone call between a mobile station and said emergency center;
• send a service invocation request to said service control point to invoke an Intelligent Network service in notification mode to start searching for second data relating to said mobile station, including more accurate location data as to where said mobile station is located;
• and
• send first data including raw location data as to where said mobile station is located to said emergency center via said telephone connection.
• said service control point being arranged to
• receive said service invocation request from said mobile switching Center;
• start said Intelligent Network service to search for said second data relating to said mobile station, including more accurate location data as to where said mobile station is located;
• and
• transfer said second data from said Intelligent Network service to said emergency center once said second data becomes available;
• said emergency center being arranged to:
• receive said first data and display said first data to an operator in said emergency center;
• and
• receive said second data from said service control point, correlate it to said first data and display said second data to said operator in said emergency center once said second data is received, wherein said first data comprises first identifying data and said second data comprises second identifying data, said first identifying data and said second identifying data being combined to form a globally unique identifier which is used in said emergency center to correlate said first data and second data to one another.

A mobile switching center arranged to:

• set up a telephone connection for a telephone call between a mobile station and an emergency center;
• send first data including raw location data as to where said mobile station is located to said emergency center for displaying said first data to an operator in said emergency center, via said telephone connection;
• send a service invocation request to a service control point to invoke an Intelligent Network service in notification mode to start searching for second data relating to said mobile station, including more accurate location data as to where said mobile station is located, for displaying to the operator in said emergency center;
• wherein said first data comprises first identifying data and said second data comprises second identifying data, said first identifying data and said second identifying data being combined to form a globally unique identifier which is used in said emergency center to correlate said first data and second data to one another.

A method performed in a mobile switching center, the method comprising:

• setting up a telephone connection for a telephone call between a mobile station and an emergency center associated with said mobile switching center;
• sending first data including raw location data as to where said mobile station is located, for display to an operator in the emergency center, to said emergency center via said telephone connection;
• sending a service invocation request to a service control point to invoke an Intelligent Network service in notification mode to start searching for second data relating to said mobile station, including more accurate location data as to where said mobile station is located, for display to the operator in the emergency center,
• wherein said first data comprises first identifying data and said second data comprises second identifying data, said first identifying data and said second identifying data being combined to form a globally unique identifier which is used in said emergency center to correlate said first data and second data to one another.

A method performed in an emergency center, the method comprising:

• receiving a telephone connection with a mobile station via a mobile switching center;
• receiving first data from said mobile switching center, said first data including raw location data as to where said mobile station is located, and displaying said first data to an operator in said emergency center;
• requesting second data from said service control point by invoking an Intelligent Network service in notification mode to start searching for second data relating to said mobile station, including more accurate location data as to where said mobile station is located;
• receiving said second data from said service control point;
• and
• displaying said second data to said operator in said emergency center once said second data is received,
• wherein said first data comprises first identifying data and said second data comprises second identifying data, said first identifying data and said second identifying data being combined to form a globally unique identifier which is used in said emergency center to correlate said first data and second data to one another.