Patent ID: 8107972

Claim:
A method for providing triggered location information to a target terminal in a system, which comprises the target terminal and a home location server (H-SLP) having registered information of the target terminal, the method comprising: (1) receiving a location value request message of the target terminal from a Secure User Plane Location AGENT (SUPL AGENT); (2) transmitting a location service start message to the target terminal; (3) selecting a visited location server (V-SLP) for calculating the location value of the target terminal and transmitting information necessary for calculating a periodic location value of the target terminal to the selected V-SLP by the H-SLP; (4) receiving a positioning method (POSMETHOD) used for calculating the location value with the target terminal and the information of the V-SLP from the V-SLP; (5) transmitting the information of the V-SLP and the POSMETHOD to the target terminal; (6) transmitting a starting information of the triggered location service of the target terminal to the SUPL AGENT; (7) receiving the calculated location value of the target terminal from the V-SLP; (8) transmitting the calculated location value of the target terminal to the SUPL AGENT; (9) receiving an indication that the target terminal is out of the range for performing the positioning from the V-SLP when the target terminal is out of the positioning range; and (10) evaluating the indication received from the V-SLP and selecting a new V-SLP in the network in which the current target terminal exists by the H-SLP, wherein the indication includes a location identifier (LID) as the information on a network in which the target terminal currently exists.