Patent ID: 7729705

Claim:
A method of providing a location service over an Internet protocol (IP) multimedia subsystem (IMS) network in a wireless communication system, the method comprising the steps of: transmitting, by a location service client, a service connection request message including a message requesting location information of a user equipment (UE); and transmitting, by the UE, the location information to the location service client, wherein the location service client transmits the service connection request message as a Session Initiation Protocol (SIP) message to a Proxy Call Session Control Function (P-CSCF) requesting the location information of the UE stored in advance by the P-CSCF as an address of a Serving Call Session Control Function (S-CSCF), wherein the SIP message includes a mobile location protocol (MLP) message in a session description protocol (SDP) area, and wherein transmitting the SIP message to the UE comprises, upon receipt of the SIP message, checking a privacy class of the UE and transmitting the SIP message to the UE by the S-CSCF, only when the privacy class allows.