US 11,800,484 B2
User equipment (UE) positioning
Woonghee Lee, Seoul (KR); and Jingya Li, Gothenburg (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Nov. 24, 2020, as Appl. No. 17/102,902.
Prior Publication US 2022/0167303 A1, May 26, 2022
Int. Cl. H04W 64/00 (2009.01); G01S 5/02 (2010.01); B64C 39/02 (2023.01)
CPC H04W 64/006 (2013.01) [B64C 39/024 (2013.01); G01S 5/0249 (2020.05); G01S 5/0284 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for estimating the location of a target user equipment (UE) using a positioning system comprising a set of N positioning reference nodes (PRNs), the method comprising:
selecting, from the set of N PRNs, a subset of PRNs that minimizes or maximizes an objective function, wherein the objective function is a function that is adapted to map information about a given subset of the N PRNs to an error value indicating a positioning error of the target UE; and
using the selected subset of PRNs to estimate the location of the target UE, wherein
selecting the subset of PRNs that minimizes or maximizes the objective function comprises:
evaluating the objective function for a first subset of the N PRNs to produce a first error value;
evaluating the objective function for a second subset of the N PRNs to produce a second error value;
comparing the first error value to the second error value; and
based on a result of the comparing, selecting either the first subset or the second subset.