Patent ID: 8451779

Claim:
A method implemented by a computing device, the method comprising: receiving, by the computing device and from a femto management subsystem (FMS) device, a request to update a femto cell to macro cell mapping function (F2M-MF) table; updating, by the computing device, the femto cell to macro cell mapping function table based on the request; receiving, by the computing device and from a proxy call session control function (P-CSCF) device, a query for a macro E-UTRAN cell global identifier (ECGI) and a femto global positioning system (GPS) identifier of a user equipment (UE) when an emergency call is placed by the UE, where the macro ECGI and the femto GPS identifier correspond to a femto ECGI of the UE; and providing, by the computing device and to the P-CSCF device, the macro ECGI and the femto GPS identifier of the UE based on the query received from the P-CSCF device.