Abstract: In accordance with an example embodiment of the present invention, an apparatus comprises a receiver for receiving a list of access points detected at a location, a processor for determining the number of times at least one access point in the list is detected during a first period of time and a processor for determining to use an access point in generating a partial radio map based at least in part on the number of times the access point is detected during a second period of time.

Abstract: In accordance with an example embodiment, an apparatus comprises a first receiver configured to receive a first partial radio map and a second partial radio map, a processor configured to compare the first partial radio map and the second partial radio map, and the processor further configured to determine to replace the first partial radio map with the second partial radio map based at least in part on a result of the comparison.

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: In accordance with an example embodiment of the present invention, an apparatus comprises a processor configured to determine a first result of estimating a position based at least in part on a first partial radio map, the processor further configured to perform a first comparison of the first result to a reference position, and a memory configured to store a second result based upon the comparison.

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 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 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: In accordance with an example embodiment, an apparatus comprises a first receiver configured to receive a first partial radio map and a second partial radio map, a processor configured to compare the first partial radio map and the second partial radio map, and the processor further configured to determine to replace the first partial radio map with the second partial radio map based at least in part on a result of the comparison.

Abstract: A method performed by an apparatus is disclosed. The method comprises obtaining position information on a position and received signal strength information representative of a strength of a signal from a communication node receivable at the position. The method further comprises generating or updating a 3D sectorized path-loss model associated with the communication node at least based on the position information and the received signal strength information, wherein the position information and the received signal strength information are used to generate or update one or more path-loss parameters for a 3D sector of a set of one or more 3D sectors of the 3D sectorized path-loss model in which 3D sector the position is located.

Abstract: In accordance with an example embodiment of the present invention, an apparatus comprises a processor configured to determine a first result of estimating a position based at least in part on a first partial radio map, the processor further configured to perform a first comparison of the first result to a reference position, and a memory configured to store a second result based upon the comparison.

Abstract: In accordance with an example embodiment of the present invention, an apparatus comprises a receiver configured to receive a first plurality of lists of access points, at least one processor configured to determine a first access point which is comprised in a highest number of lists in the plurality of access points, the at least one processor further configured to determine a second access point which is comprised in a highest number of lists in a second plurality of lists, wherein the second plurality of lists is comprised of lists of access points from the first plurality of lists which do not comprise the first access point, and the at least one processor further configured to set a significance flag for the first access point and the second access point.

Abstract: A method performed by an apparatus is disclosed. The method comprises obtaining position information on a position and received signal strength information representative of a strength of a signal from a communication node receivable at the position. The method further comprises generating or updating a 3D sectorized path-loss model associated with the communication node at least based on the position information and the received signal strength information, wherein the position information and the received signal strength information are used to generate or update one or more path-loss parameters for a 3D sector of a set of one or more 3D sectors of the 3D sectorized path-loss model in which 3D sector the position is located.

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.