Location information system and method for performing notification based upon location

A location based notification method in a H-SLP (Home-SUPL (Secure User Plane) Location Platform) for calculating and providing a location of a roaming terminal according to a client's request, the method comprising:

• receiving, by the H-SLP, a client's request for positioning of a roaming terminal;
• transmitting, by the H-SLP, a SUPL INIT (SUPL Initialization) message to the roaming terminal before a connection with the roaming terminal is established, the SUPL INIT message including a notification mode parameter indicating whether or not a notification and verification based on the location of the roaming terminal are to be performed after the location of the roaming terminal is calculated;
• transferring, by the H-SLP, a positioning start message to a V-SLP (Visited-SUPL (Secure User Plane) Location Platform) to start the calculation of the location of the roaming terminal with the V-SLP, if the H-SLP receives a SUPL POS INIT (SUPL Positioning Initialization) message from the roaming terminal in response to the SUPL INIT message;
• receiving, by the H-SLP, the calculated location of the roaming terminal from the V-SLP after the transferring step;
• after receiving the calculated location of the roaming terminal from the V-SLP, transmitting, by the H-SLP, a SUPL NOTIFY message including a notification element to the roaming terminal if the notification mode parameter indicates that the notification and verification based on the location of the roaming terminal are to be performed;
• receiving, by the H-SLP from the roaming terminal in response to the SUPLY NOTIFY message, a SUPL NOTIFY RESPONSE message that includes a verification indicating whether to allow or not allow a provision of the calculated location of the roaming terminal to the client;
• and
• transmitting, by the H-SLP, the calculated location of the roaming terminal to the client in response to the received SUPL NOTIFY RESPONSE message when the received SUPL NOTIFY RESPONSE message includes the verification indicating to allow the provision of the calculated location of the roaming terminal to the client.