Here Global B.v.

Elena-Simona Lohan

Lauri Aarne Johannes Wirola

Lauri Wirola

Jukka Olavi Talvitie

Pavel Ivanov

Jari Syrjarinne

Muhammad Irshan Khan

Jari Tapani Syrjärinne

Jari Syrjärinne

Jukka Talvitie

Jari SYRJÄRINNE

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. 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. The apparatus selects a subset of transform indices having more significant transform values than the remaining transform indices and compresses the transform indices by encoding each transform index exploiting a probability of occurrence of an index value of a respective transform index. The same or another apparatus decodes the compressed transform indices again for use in position operations.

Compressing and decompressing data about radio signals

It is disclosed to obtain a frequency transformed radiomap data set by applying a discrete frequency transform to an original radiomap data set. It is also disclosed to obtain a reconstructed radiomap data set by applying an inverse discrete frequency transform to a frequency transformed radiomap data set.

Frequency transformed radiomap data set

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 (). 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 (). The apparatus selects a subset of transform indices having more significant transform values than the remaining transform indices () and compresses the transform indices by encoding each transform index exploiting a probability of occurrence of an index value of a respective transform index (). The same or another apparatus decodes the compressed transform indices again for use in position operations.

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.

Determining of model parameters for positioning purposes

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. Furthermore, a method performed by an apparatus is disclosed, the method comprising, at least one of storing, providing or obtaining information on or derived from a 3D sectorized path-loss model associated with a communication node, the 3D sectorized path-loss model comprising one or more 3D sectors with one or more respective path-loss parameters, the information on or derived from the 3D sectorized path-loss model useable, together with received signal strength information representative of a strength of a signal received from the communication node by a device, in a process of determining an estimate of a position of the device. According apparatuses, computer programs and computer readable media storing such computer programs are disclosed.

3D sectorized path-loss models for 3D positioning of mobile terminals

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. Furthermore, a method performed by an apparatus is disclosed, the method comprising at least one of storing, providing or obtaining information on or derived from a 3D sectorized path-loss model associated with a communication node, the 3D sectorized path-loss model comprising one or more 3D sectors with one or more respective path-loss parameters, the information on or derived from the 3D sectorized path-loss model useable, together with received signal strength information representative of a strength of a signal received from the communication node by a device, in a process of determining an estimate of a position of the device. According apparatuses, computer programs and computer readable media storing such computer programs are disclosed.

Growing community of inventors

Tampere, Finland

Elena-Simona Lohan