公开(公告)号：US20240276443A1

公开(公告)日：2024-08-15

申请号：US18042031

申请日：2021-06-02

Applicant: KOREA RAILROAD RESEARCH INSTITUTE

Inventor： Seung Min YU ,  Jun LEE ,  So Young YOU ,  Sang Pil KO ,  Eun Bi JEONG

IPC: H04W64/00 ,  H04B17/318 ,  H04W48/20

CPC classification number: H04W64/006 ,  H04B17/328 ,  H04W48/20

Abstract: A method and an apparatus for timing measurement based positioning to minimize the number of scans is provided. The positioning method for a terminal includes estimating a temporary location of the terminal; analyzing characteristics of obstacles between the temporary location of the terminal and peripheral access points (APs) based on a pre-stored map on which the peripheral APs and the obstacles are indicated; calculating distances between the temporary location of the terminal and the peripheral APs based on the map; selecting at least three peripheral APs from among the peripheral APs according to at least one of the distances or the obstacle characteristics; generating timing measurement data with the at least three peripheral APs using identification information of the at least three peripheral APs; and estimating a current location of the terminal using the timing measurement data.

公开(公告)号：US20230152415A1

公开(公告)日：2023-05-18

申请号：US18157304

申请日：2023-01-20

Applicant: KOREA RAILROAD RESEARCH INSTITUTE

Inventor： Seung Min YU ,  Jun LEE ,  So Young YOU ,  Sang Pil KO ,  Eun Bi JEONG

IPC: G01S5/02 ,  G01S5/00

CPC classification number: G01S5/0244 ,  G01S5/0289 ,  G01S5/0072 ,  G01S2201/02

Abstract: A method and apparatus for cooperative positioning is disclosed herein. A method for cooperative positioning performed by a target device includes: scanning a beacon signal transmitted by at least one peripheral device; determining whether at least one peripheral device exist within a reference radius based on the beacon signal; when the at least one peripheral device is within the reference radius, transmitting a cooperative positioning request to the at least one peripheral device; receiving, in response to transmitting the cooperative positioning request, location of the at least one peripheral device and a degree of reliability for the location of the at least one peripheral device; and determining a location of the target device based on the location and the degree of reliability.