US 12,015,966 B2 · Method and apparatus for sensor selection for localization and tracking

Abstract

Methods and apparatus for sensor selection for localization and tracking are provided. A method (300) performed at an access point (101, 101a, 101b, 101c, 901, 902, 903) comprises: determining, a detectability of the access point (101, 101a, 101b, 101c, 901, 902, 903) for localization for a target device (102), based on channel state information of a radio link between the target device (102) and the access point (101, 101a, 101b, 101c, 901, 902, 903) (302); and determining whether the access point (101, 101a, 101b, 101c, 901, 902, 903) is to be used for position estimation of the target device (102) or not based on the detectability (304). A localization server (103) may further eliminate access points (101, 101a, 101b, 101c, 901, 902, 903) at poor positions from position estimation, by using a predefined weighted-kernel approach.

Claims15

Dependent claims

A method performed at a localization server, comprising:

determining weights of at least two access points, wherein a weight of an access point is associated with a detectability of the access point for localization of a target device;
constructing respective weighted kernel functions for each of the at least two access points;
computing for each of the at least two access points, an inner product of the weight of the respective access point with a weighted kernel function constructed for the respective access point;
constructing an estimation error function by using inner product for the at least two access points;
determining weight parameters of the respective weighted kernel functions, to optimize the estimation error function with a constrain condition of L1 regularization;
and
selecting one or more access points to be used for position estimation of the target device from the at least two access points, according to the determined weight parameters.

4 more elements

An apparatus at a localization server, comprising:

at least one processor;
and
at least one memory including computer program code, the memory and the computer program code configured to, with the processor, cause the apparatus at least to,
determine weights of at least two access points, where a weight of an access point is associated with a detectability of the access point for localizing a target device;
construct respective weighted kernel functions for each of the at least two access points;
compute for each of the at least two access points, an inner product of the weight of the respective access point with a weighted kernel function constructed for the respective access point;
construct an estimation error function by using inner product for the at least two access points;
determine weight parameters of the respective weighted kernel functions, to optimize the estimation error function with a constrain condition of L1 regularization;
and
select one or more access points to be used for position estimation of the target device from the at least two access points, according to the determined weight parameters.

7 more elements

Dependencies are inferred from the claim text.

Method and apparatus for sensor selection for localization and tracking

Life of this patent

Method and apparatus for sensor selection for localization and tracking

Life of this patent

Abstract

Claims15