Method for requesting triggered location service between terminals in location information system

A method for requesting a triggered location service between terminals in a location information system, comprising:

• requesting, by a first terminal, of a triggered location service of a second terminal to a first location server;
• transferring of the triggered location service request to a second location server from the first location server;
• initiating, by the second location server, a positioning session with the second terminal and calculating of a location of the second terminal;
• and
• providing, by the second location server, a periodic positioning service or area-related positioning service to the first terminal through the first location server according to a triggered location service request type of the first terminal.

A method for requesting a triggered location service between terminals in location information system, comprising:

• requesting, by a first terminal, of positioning of a second terminal to a first location server through a SET init message;
• transferring the positioning request of the second terminal through a location request message from the first location server to a second location server;
• performing, by the second location server, of a positioning procedure with the second terminal periodically and calculating a location of the second terminal;
• and
• receiving, by the first location server, location values of the second terminal calculated in the second location server through location response messages, and reporting said location values to the first terminal.