US 11,991,734 B2
Fingerprinting enhancement with multi-band AoA measurements
Torbjörn Wigren, Uppsala (SE); and Meng Wang, Vic (AU)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Filed by TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed on Jun. 1, 2021, as Appl. No. 17/336,031.
Application 17/336,031 is a continuation of application No. 16/607,038, granted, now 11,026,242, previously published as PCT/IB2017/052321, filed on Apr. 21, 2017.
Prior Publication US 2021/0289511 A1, Sep. 16, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 72/542 (2023.01); G01S 5/02 (2010.01); G01S 5/04 (2006.01); H04W 64/00 (2009.01); H04W 72/044 (2023.01); H04W 72/51 (2023.01)
CPC H04W 72/542 (2023.01) [G01S 5/02525 (2020.05); G01S 5/0268 (2013.01); G01S 5/04 (2013.01); H04W 64/006 (2013.01); H04W 72/044 (2013.01); H04W 72/51 (2023.01)] 18 Claims
OG exemplary drawing
 
1. A method for positioning of a target station (STA) by a radio network device, the method comprising:
receiving sounding feedback, from a target station (STA), for each of a plurality of subbands in response to sending a sounding signal, the sounding feedback including angle-of-arrival (AoA) measurements for each subband of the plurality of subbands;
calculating an AoA characteristic from the sounding feedback for at least a subset of the plurality of subbands;
mapping the AoA characteristics of the at least the subset of the plurality of subbands to a fingerprint in a fingerprint reference map;
determining a location of the target STA based on at least the fingerprint and
a hazardous gas; and
the determining the location of the target STA including using a time measurement based on the fingerprint not uniquely identifying the location of the target STA.