Abstract: A first apparatus assembles assistance data for a satellite signal based positioning of a device, the assistance data comprising a satellite specific ionospheric model for at least one specific satellite and a time stamp that relates the satellite specific ionospheric model to particular ephemeris data for the at least one specific satellite. The assistance data is provided for transmission. A second apparatus receives the assistance data and computes a position of the device making use of the particular ephemeris data and of the satellite specific ionospheric model.

Abstract: An apparatus assembles positioning assistance data using a predetermined version of a set of values of parameters. The positioning assistance data relates to radio signals of a particular positioning support device. The apparatus encrypts the positioning assistance data using an encryption key that is associated with this version and causes the particular positioning support device to transmit the assembled and encrypted data. The positioning support device transmits the data. An apparatus obtains the data, received by a mobile device, and attempts to decrypt the data using at least one encryption key. If the decryption is successful with a particular encryption key, a version of a set of values of parameters may be selected that is associated with the encryption key.

Abstract: A positioning support device transmits radio signals using at least one default configuration parameter value. A mobile device measures characteristics of the signals at different locations. An apparatus assembles, based on the measured characteristics and indications of the locations of measurement, data which enables a determination of characteristics of radio signals transmitted by the positioning support device, which are expected to be observable at different locations. The apparatus determines in addition at least one adapted configuration parameter value and causes the positioning support device to store the assembled data for future transmissions and to use the at least one adapted configuration parameter value for future transmissions. As a result, the positioning support device transmits radio signals including the stored data using the at least one adapted configuration parameter value.

Abstract: A method, performed by at least a first apparatus, is disclosed, comprising: automatically and repeatedly obtaining, at said first apparatus, information representative of an ambient pressure at said first apparatus; and automatically and repeatedly sending or triggering sending, by said first apparatus, at least a part of said obtained information representative of an ambient pressure at said first apparatus. A method, performed by at least a second apparatus, is disclosed, comprising: obtaining information representative of an ambient pressure at a first apparatus sent by said first apparatus and received at a device; and estimating an ambient pressure at said device at least based on said information representative of an ambient pressure at said first apparatus.

Abstract: This specification describes a method comprising accessing radiomap data including location information indicating locations of plural nodes of a first class, each of the plural nodes of the first class being identifiable only by a locally-unique identifier, the locally unique identifier of each of the plural nodes being included in the radiomap data, and using the radiomap data to determine a location within a space of a radio communication apparatus based on at least one transmission received by the radio communications apparatus from at least one of the plural nodes of the first class, the at least one transmission including the locally-unique identifier of the node from which the transmission is received.

Abstract: A method is disclosed, comprising: holding available, by a first apparatus, encrypted first positioning support data, wherein said encrypted first positioning support data are decryptable by a first decryption key, and wherein said encrypted first positioning support data are configured to enable one or more mobile devices receiving said encrypted first positioning support data and having access to said first decryption key to determine their position at least partially based on said first positioning support data; and automatically and repeatedly sending or triggering sending, by said first apparatus, said encrypted first positioning support data.

Abstract: A positioning support device holds available stored data which enables a determination of characteristics of radio signals transmitted by the positioning support device, wherein the characteristics of radio signals are expected to be observable at different locations. The positioning support device automatically and repeatedly transmits the stored data. Mobile devices may receive the data to estimate their position based on the data and based on measurements on radio signals received at their current location. The positioning support device may be caused by some other apparatus to store the data that is transmitted by the positioning support device. The data may be obtained based on characteristics of radio signals observed by at least one mobile device at each of a plurality of measurement locations.

Abstract: A method performed by at least one apparatus is inter alia disclosed, said method comprising: obtaining measurement data on a location-specific quantity of a signal transmitted by a transmitter; obtaining location information associated with said measurement data on said location-specific quantity; and determining, based on said obtained measurement data and said obtained location information, one or more model parameters of a model describing said location-specific quantity in dependence of location, wherein said model assumes a location dependence of said location-specific quantity in form of a combination of a first location-specific function and a second location-specific function.

Abstract: An apparatus obtains a set of radio data comprising signal strength related values for radio signals transmitted by a transmitter with an association of each signal strength related value with a representation of a geographical location (201). The apparatus applies a frequency transform to the obtained set of radio data to obtain transform coefficients, each transform coefficient comprising a transform index and an associated transform value (202). The apparatus selects a subset of transform indices having more significant transform values than the remaining transform indices (203) and compresses the transform indices by encoding each transform index exploiting a probability of occurrence of an index value of a respective transform index (204). The same or another apparatus decodes the compressed transform indices again for use in position operations.

Abstract: Results of measurements by a mobile device on radio signals transmitted by at least one transmitter are obtained. The results of measurements comprise characteristics of the radio signals at each of a plurality of locations of measurements at a particular measurements at a particular site, and indications of the locations of site, and indications of the locations of measurement. The results of measurement and the indications of the locations are provided and used as a basis for a generation of a radio map for use in supporting a positioning of mobile mobile devices at the site. In addition, a user input to the mobile device is detected, the user input defining a localization area at the site that is to be covered by the radio map. A representation of the defined localization area is provided in addition for use in connection with the radio map.

Abstract: An apparatus obtains results of measurements by a mobile device on radio signals transmitted by a plurality of transmitters, the results of measurements comprising characteristics of the radio signals at the location of measurement. The apparatus estimates a position of the mobile device based on the obtained results of measurements and based on assistance data including information on expected characteristics of radio signals of various transmitters at various locations. The apparatus matches a distribution of characteristics of radio signals in the obtained results of measurements with a reference distribution of characteristics of radio signals. Alternatively or in addition, the apparatus determines matching transmitters for which characteristics are available in the results of measurements and in the assistance data, and matches a determined expected distribution for the matching transmitters with a predetermined reference distribution.

Abstract: An apparatus obtains fingerprints that have been collected by at least one mobile device for supporting a positioning of other mobile devices. Each fingerprint comprises results of measurements on radio signals of at least one communication node at a particular location and an indication of the particular location. The apparatus determines a positioning quality that can be achieved in a positioning which is based on obtained fingerprints collected by the at least one mobile device. The apparatus generates, based on the determined positioning quality, a feedback to a user of the at least one mobile device, the feedback indicating whether further fingerprints should be collected.

Abstract: An apparatus obtains fingerprints that have been collected by a plurality of mobile devices at a particular site for supporting a positioning of other mobile devices, each fingerprint comprising results of measurements on radio signals of at least one communication node at a particular location and an indication of the particular location. The apparatus generates feedback information based on the obtained fingerprints as a whole for coordinating a collection of fingerprints by the plurality of mobile devices. The apparatus transmits the feedback information to the plurality of mobile devices for presentation to users of the mobile devices.

Abstract: An apparatus that determines, based on a geometrical criterion and at least one map object of plurality of map objects, whether a map element of a first map element type or a second map element type shall be created; wherein elements of the first map element type are intended to be usable for applying a constraint to a user position and wherein elements of the second map element type are intended to be less usable for applying a constraint to a user position compared to the elements of the first map element type; and creates a map element according to the determined map element type, the created map element being associated with the at least one map object.

Abstract: An apparatus obtains results of measurements, which are performed by a mobile device on signals of communication nodes. The measurement results for each of the communication nodes include a signal strength related value and an identification of the communication node. The apparatus obtains for one of the communication nodes a stored indication of a location and a stored signal strength related value and determines a difference between measured and stored signal strength related values. The apparatus estimates the position of the mobile device based on the results of measurements and on obtained stored radio model data. In the case that the determined difference for the at least one communication node falls short of a predetermined threshold, the apparatus determines a distance between estimated position and indicated location for the at least one communication node, as an indication of a health state of stored radio model data.

Abstract: An apparatus obtains fingerprints that have been collected by at least one mobile device for supporting a positioning of other mobile devices. Each fingerprint comprising results of measurements on radio signals of at least one communication node at a particular location and an indication of the particular location. The apparatus estimates values of parameters defining a radio model for the at least one communication node based on the obtained fingerprints. The apparatus determines a quality of the radio model. The apparatus generates data for a feedback for a user of the at least one mobile device based on the determined quality of the radio model.

Abstract: An apparatus obtains data comprising magnetic flux density data and an association of the magnetic flux density data to grid points of at least one grid, each grid point representing at least a geographical location. The apparatus applies at least one frequency transform to a representation of the magnetic flux density data and their association to grid points to obtain frequency components. The apparatus provides compressed magnetic flux density data comprising a subset of the obtained frequency components for at least one of storage and transmission. The same apparatus or another apparatus applies at least one inverse frequency transform to the frequency components in order to recover the magnetic flux density data and their association with different grid points and provides the recovered magnetic flux density data and their association with different grid points for supporting a positioning of a mobile device.

Abstract: Apparatus is configured to scan for radio signals transmitted by at least first and second transmitting devices; for each radio signal identified in the scan, receive an identifier relating to the originating transmitting device from the radiosignal; use the identifier and/or parameters of a radio signal received from the first transmitting device and the identifier and/or parameters of a radio signal received from the second transmitting device to detect whether the first and second transmitting devices are co-located; and in response to detecting that the first and second transmitting devices are co-located: create a group for the transmitting devices that are identified as being co-located; create wireless fingerprint data for the group as a whole and refrain from creating wireless fingerprint data for every transmitting device of the group; and cause transmission of the wireless fingerprint data to a remote server.

Abstract: It is disclosed to obtain physical layout data of radiomap based on a plurality of location information representatives, each of the location information representatives being associated with a radiomeasurement.

Abstract: It is disclosed to obtain an observation data set comprising respective identification information of one or more observed radio nodes of an environment and respective radio measurements values determined with respect to the one or more observed radio nodes; to determine respective association measures for the observation data set with respect to respective radiomap data sets of two or more levels of the environment, wherein the radiomap data sets respectively comprise respective identification information of one or more radio nodes of the environment observable at the level of the respective radiomap data set and respective radio measurement value information for these one or more observable radio nodes; and to determine an estimate of a level associated with the observation data set based at least on the association measures.