1. A gateway for providing location information for a wireless transmit/receive unit (WTRU), the gateway comprising:a processor, the processor configured to:
receive a location update message from a femtocell that includes location information for the WTRU;
determine that the WTRU has been authenticated by a security procedure between the WTRU and the femtocell;
determine whether a service for an application has been triggered for the WTRU; and
send the location information for the WTRU to the application when the service for the application has been triggered for the WTRU.