Method for processing location information relating to a terminal connected to a packet network via a cellular network

A method (400) for processing location information, which is related to a certain mobile station in a cellular network, the method comprising the step of:

• a first network element, which is connected to the cellular network, receiving (401) a location information request (201) relating to the mobile station from a second network element, which is connected to a packet data network,
• requesting (404) from a third network element, which is connected to the packet data network, a security document relating to the second network element,
• initiating the establishment (406) of at least one security association, which security association specifies at least data origin authentication and points from the second network element to the first network element and which establishment involves use of information comprised in the security document,
• after successful establishment of said security association, authenticating (408) the data origin of the location service request, and
• if the data origin of the location service request is authenticated successfully, initiating (410) a location procedure relating to the mobile station in the cellular network.