Method of generating direction vector of particle, and apparatus and method for estimating indoor location based thereon
AssigneeElectronics and Telecommunications Research Institute
InventorsMyung In Ji, Ju Il Jeon, Young Su Cho, Kyeong Soo Han
Life of this patent
Estimating the term…
Abstract
Provided is a method of generating direction vectors of particles. The method includes calculating, by a processor, a center of gravity of the particles on the basis of characteristic values of one or more particles in a cluster including the particles, and generating, by the processor, direction vectors of the particles on the basis of the center of gravity.
Claims15
An apparatus for estimating an indoor location in a wireless communication environment, the apparatus comprising:
- an interface unit configured to receive a positioning infrastructure measurement value from a terminal and a radio map database (DB) which is referred to by one or more particles in a cluster including the particles;
- and
- a processor configured to:
- set a service area in which the particles form the cluster;
- initialize the particles within the service area;
- calculate characteristic values of the particles on the basis of the positioning infrastructure measurement values including wireless signal strength information from the terminal and the radio map DB which is referred to by the particles;
- calculate a center of gravity of the particles using the characteristic values;
- calculate direction vectors of the particles on the basis of the center of gravity;
- perform resampling on the particles according to the direction vector of each particle to reduce convergence time of particle distribution toward a location of the terminal;
- and
- estimate an indoor location of the terminal based on a result of the resampling on the particles according to the direction vector of each particle.
A method of estimating an indoor location in a wireless communication environment, the method comprising:
- receiving, by an interface unit, positioning infrastructure measurement values from a terminal and a radio map database (DB) which is referred to by a plurality of particles in a cluster including the particles;
- setting a service area in which the particles form the cluster;
- initializing the particles within the service area;
- calculating, by a processor, characteristic values of the particles on the basis of the positioning infrastructure measurement values including wireless signal strength information from the terminal and the radio map DB which is referred to by the particles, calculating a center of gravity of the particles using the characteristic values, and calculating direction vectors of the particles on the basis of the center of gravity;
- performing resampling on the particles according to the direction vector of each particle to reduce convergence time of particle distribution toward a location of the terminal;
- and
- estimating, by the processor, an indoor location of the terminal based on a result of the resampling on the particles according to the direction vector of each particle.
A method of generating direction vectors of particles in a wireless communication environment, the method comprising:
- receiving information on the particles corresponding to a radio map database (DB);
- setting a service area in which the particles form a cluster;
- initializing the particles within the service area;
- calculating, by a processor, a center of gravity of the particles on the basis of characteristic values of one or more particles in the cluster including the particles;
- generating, by the processor, direction vectors of the particles on the basis of the center of gravity;
- and
- performing resampling on the particles according to the direction vector of each particle to reduce convergence time of particle distribution toward a location of the terminal.
Dependencies are inferred from the claim text.