US 11,889,459 B2
Phase-based distance determination for wireless networks
Tarik Kazaz, Rotterdam (NL); Mario Alberto Coutino Minguez, Rotterdam (NL); Gerardus Johannes Maria Janssen, Rotterdam (NL); Geert Jozef Therese Leus, Rotterdam (NL); and Alle Jan Van der Veen, Rotterdam (NL)
Assigned to KONINKLIJKE KPN N.V., Rotterdam (NL); and TECHNISCHE UNIVERSITEIT DELFT, Delft (NL)
Appl. No. 17/433,942
Filed by Koninklijke KPN N.V., Rotterdam (NL); and Technische Universiteit Delft, Delft (NL)
PCT Filed Mar. 9, 2020, PCT No. PCT/EP2020/056275
§ 371(c)(1), (2) Date Aug. 25, 2021,
PCT Pub. No. WO2020/178459, PCT Pub. Date Sep. 10, 2020.
Claims priority of provisional application 62/815,164, filed on Mar. 7, 2019.
Prior Publication US 2022/0095262 A1, Mar. 24, 2022
Int. Cl. H04L 5/00 (2006.01); H04W 56/00 (2009.01); H04W 64/00 (2009.01); G01S 11/08 (2006.01)
CPC H04W 64/00 (2013.01) [G01S 11/08 (2013.01); H04L 5/0048 (2013.01); H04W 56/002 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for determining a distance and/or a frequency offset between a first node and a second node in a wireless network, the method comprising:
the first node transmitting a first request message based on a first carrier signal to the second node and receiving a plurality of first response messages from the second node, the plurality of first response messages being transmitted based on a first reference carrier signal by the second node to the first node;
the first node transmitting a second request message based on a second carrier signal to the second node and the first node receiving a plurality of second response messages from the second node, the plurality of second response messages being transmitted based on a second reference carrier signal by the second node to the first node;
the first node receiving a first phase difference and second phase difference from the second node, the first phase difference defining a difference between a phase of the first carrier signal and a phase of the first reference carrier signal at a predetermined time instance associated with the first request message and the second phase defining a difference between a phase of the second carrier signal and a phase of the second reference carrier signal at a predetermined time instance associated with the second request message;
the first node determining a set of third phase differences and a set of fourth phase differences based on the plurality of first response messages and the plurality of second response messages respectively, each of the set of third phase differences defining a difference between a phase of the first reference carrier signal and a phase of the first carrier signal at a predetermined time instance associated with one of the plurality of first response messages; and, each of the set of fourth phase differences defining a difference between a phase of the second reference carrier signal and a phase of the second carrier signal at a predetermined time instance associated with one of the plurality of second response messages; and, optionally,
the first node and/or the second node or a further node determining a distance and/or a frequency offset between the first node and the second node based on the first and second phase difference and the set of third and fourth phase differences.