US 11,689,301 B2 · Electric field map generation device, method, program, and localization device

Abstract

Time and effort to generate an electric field map to realize high-accuracy positioning is reduced. In an electric field map generation device (10) that generates an electric field map in which RSSI obtained when radio waves transmitted from a beacon (60) are observed at each of a plurality of points in the same space is associated with each of coordinates at the plurality of points, a radio wave strength acquisition unit (12) acquires RSSI observed at each of at least three observation points different in distance from the beacon (60), a space propagation characteristics estimation unit (14) estimates space propagation characteristics of the radio waves transmitted from the beacon (60) in the same space using the acquired RSSI at the observation points, a radio wave strength estimation unit (16) estimates RSSI at estimation points on the basis of the estimated space propagation characteristics and distances between the estimation points different from the observation points and the beacon (60), and a generation unit (18) generates the electric field map (26) using the RSSI at the observation points and the estimation points.

Claims17

Dependent claims

A computer-implemented method for generating an electronic field map of a space, the method comprising:

receiving first radio wave strength data observed at each of a first set of points, wherein the first set of points include at least three distinct points with respectively distinct distances in the space from a location of a radio wave transmitter;
determining, based on the received first radio wave strength data, space propagation characteristics of radio waves from the radio wave transmitter in the space, wherein the space propagation characteristics of radio waves depend on a distance from the radio wave transmitter;
receiving a point, wherein the point is distinct from points in the first set of points;
determining a pattern for estimating a radio wave strength data using at least the determined space propagation characteristics, wherein the pattern depends on a distance between the point and the radio wave transmitter;
determining, based on the determined pattern, a second radio wave strength data at the point;
and
generating, based at least on the determined second radio wave strength data of a combination of the received first radio wave strength data and the determined second radio wave strength data, the electronic field map of the space.

4 more elements

A system for generating an electronic field map of a space, the system comprises:

a processor;
and
a memory storing computer-executable instructions that when executed by the processor cause the system to:
receive first radio wave strength data observed at each of a first set of points, wherein the first set of points include at least three distinct points with respectively distinct distances in the space from a location of a radio wave transmitter;
determine, based on the received first radio wave strength data, space propagation characteristics of radio waves from the radio wave transmitter in the space, wherein the space propagation characteristics of radio waves depend on a distance from the radio wave transmitter;
receive a point, wherein the point is distinct from points in the first set of points;
determine a pattern for estimating a radio wave strength data using at least the determined space propagation characteristics, wherein the pattern depends on a distance between the point and the radio wave transmitter;
determining, based on the determined pattern, a second radio wave strength data at the point;
and
generate, based at least on the determined second radio wave strength data of a combination of the received first radio wave strength data and the determined second radio wave strength data, the electronic field map of the space.

7 more elements

A computer-readable non-transitory recording medium storing computer-executable instructions that when executed by a processor cause a computer system to:

receive first radio wave strength data observed at each of a first set of points, wherein the first set of points include at least three distinct points with respectively distinct distances in the space from a location of a radio wave transmitter;
determine, based on the received radio wave strength data, space propagation characteristics of radio waves from the radio wave transmitter in the space, wherein the space propagation characteristics of radio waves depend on a distance from the radio wave transmitter;
receive a point, wherein the point is distinct from points in the first set of points;
determine, based on the determined space propagation characteristics of radio wave and a distance between the point and the radio wave transmitter, a second radio wave strength data at the point, wherein the determine the second radio wave strength data further comprises:
determine a pattern for estimating a radio wave strength data using at least the determined space propagation characteristics, wherein the pattern depends on a distance from the radio wave transmitter;
and
determine, based on the determined pattern, the second radio wave strength data at the point;
and
generate, based at least on the determined second radio wave strength data of a combination of the received first radio wave strength data and the determined second radio wave strength data, the electronic field map of the space.

6 more elements

Dependencies are inferred from the claim text.

Electric field map generation device, method, program, and localization device

Life of this patent

Electric field map generation device, method, program, and localization device

Life of this patent

Abstract

Claims17