A mobile device (12, 120), comprising: - a transceiver (124, 125, 126) configured to transceive on a radio link between the mobile device (12, 120) and an access point node (10, 100A, 100B, 100C, 111), - at least one processor coupled with the transceiver (124, 125, 126) and configured to determine several locations of the mobile device (12, 120), based on a reference positioning technique comprising at least one of inertial Navigation System positioning, and fixed reference locations and configured to determine a plurality of location-specific downlink properties of the radio link at each of the several locations, wherein the at least one processor is further configured to fuse the plurality of location-specific downlink properties to obtain, for each of the several locations, a location-specific fingerprint of the radio link associated with the determined location of the mobile device (12, 120), - an interface coupled with the at least one processor and configured to communicate with a fingerprint repository node, wherein the at least one processor is configured to send, via the interface, data indicative of the location-specific fingerprint for each of the several locations to the fingerprint repository node using a wireless local Area Network Radio Access Technology, wherein the interface coupled with the at least one processor is configured to communicate with the access point node (10, 100A, 100B, 100C, 111), wherein the at least one processor is configured to receive, via the interface from the access point node (10, 100A, 100B, 100C, 111), data indicative of a plurality of location-specific uplink properties of the radio link, the plurality of location-specific uplink properties being associated with the determined location of the mobile device (12, 120), wherein the at least one processor is further configured to fuse the plurality of location-specific uplink properties and the plurality of location-specific downlink properties to obtain the location-specific fingerprint of the radio link associated with the determined location of the mobile device (12, 120),. - a transceiver (124, 125, 126) configured to transceive on a radio link between the mobile device (12, 120) and an access point node (10, 100A, 100B, 100C, 111), - at least one processor coupled with the transceiver (124, 125, 126) and configured to determine several locations of the mobile device (12, 120), based on a reference positioning technique comprising at least one of inertial Navigation System positioning, and fixed reference locations and configured to determine a plurality of location-specific downlink properties of the radio link at each of the several locations, wherein the at least one processor is further configured to fuse the plurality of location-specific downlink properties to obtain, for each of the several locations, a location-specific fingerprint of the radio link associated with the determined location of the mobile device (12, 120), - an interface coupled with the at least one processor and configured to communicate with a fingerprint repository node, wherein the at least one processor is configured to receive, via the interface from the access point node (10, 100A, 100B, 100C, 111), data indicative of a plurality of location-specific uplink properties of the radio link, the plurality of location-specific uplink properties being associated with the determined location of the mobile device (12, 120), wherein the at least one processor is further configured to fuse the plurality of location-specific uplink properties and the plurality of location-specific downlink properties to obtain the location-specific fingerprint of the radio link associated with the determined location of the mobile device (12, 120),.