US 12,228,668 B2
Method, system and communication device for determining a position of the device
Alberto Gonzalez Escudero, Linköping (SE); Niklas Blomqvist, Linköping (SE); and Ulf Händel, Norsholm (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/762,114
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Sep. 24, 2019, PCT No. PCT/SE2019/050915
§ 371(c)(1), (2) Date Mar. 21, 2022,
PCT Pub. No. WO2021/061030, PCT Pub. Date Apr. 1, 2021.
Prior Publication US 2022/0349982 A1, Nov. 3, 2022
Int. Cl. H04W 4/02 (2018.01); G01S 5/00 (2006.01); G01S 5/02 (2010.01); H04W 64/00 (2009.01)
CPC G01S 5/0264 (2020.05) [G01S 5/0036 (2013.01); H04W 64/006 (2013.01); G01S 2205/008 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A method performed by a system for determining a position of a device connected to a communication network, the method comprising:
obtaining a geographical area for the device based on a first position-estimation service;
obtaining information on luminosity on the device over a time period; and
determining a second position estimation for the device based on the geographical area and on the information on luminosity, by comparing the information on luminosity over the time period to a 3D model of the geographical area, the 3D model comprising models of 3D objects of the geographical area and a model of sunlight shining onto the models of the 3D objects over the time period.
 
11. A position-determining method performed by a communication device connected to a communication network, the communication device having a luminosity sensor, the method comprising:
determining luminosity at the luminosity sensor over a time period; and
sending information on the determined luminosity over the time period to a system connected to the communication network, wherein the determined and sent information on luminosity is suitable for determining a position of the communication device, wherein the information indicates that the luminosity at the luminosity sensor changed by at least a threshold value over the time period so as to reflect a transition between sunlight and shadow at the luminosity sensor over the time period.