Patent ID: 8165602

Claim:
A method for providing Location Based Services (LBS) in a mobile communication system, the method comprising the steps of: transmitting, upon receipt of a location trigger at a Location Server (LS) for requesting location information of a Mobile Station (MS) from a location client, an authentication request message for requesting an IDentifier (ID) of an anchor authenticator for the MS from the LS to an Authorization, Authentication and Accounting server (AAA); transmitting, upon receipt of the authentication request message at the AAA, an authentication response message including an ID of the anchor authenticator from the AAA to the LS; transmitting, upon receipt of the authentication response message at the LS, a location information request message for requesting location information of the MS from the LS to the anchor authenticator; transmitting, upon receipt of the location information request message at the anchor authenticator, an initiate paging request message from the anchor authenticator to an Anchor Paging Controller (APC) to initiate a paging operation for the MS when the MS is in an idle mode; detecting, by the APC, upon receipt of the initiate paging request message at the APC a serving Location Controller (LC) of the MS by paging the MS and transmitting a Location Controller IDentifier (LCID) of the serving LC from the APC to the anchor authenticator; and transmitting, a location response message including location information of the MS in response to the location information request message from the LC to the LS; wherein the MS is in an idle mode.