Abstract: The invention proposes a method and system for transferring location Data in a mobile network, preferably for assisting in locating one or more Mobile Station(s) in the network, the network comprising at least one receiver outputting raw location data, and at least one location entity. The raw location data are transferred from the receiver to the location entity using one or more signalling protocol(s), e.g. LLP. The location entity is adapted to process the received raw location data so as to generate assistance data which are transferred to the mobile station. The invention is preferably used in a network-assisted mobile-based GPS location method and system allowing to detect the present location of a Mobile Station.