US 12,474,432 B2
User equipment (UE) movement state estimation based on measurements for two or more sites in a wireless network
Torbjörn Wigren, Uppsala (SE); and Walter Müller, Upplands Väsby (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 18/028,013
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Oct. 19, 2020, PCT No. PCT/SE2020/051001
§ 371(c)(1), (2) Date Mar. 23, 2023,
PCT Pub. No. WO2022/086378, PCT Pub. Date Apr. 28, 2022.
Prior Publication US 2023/0341502 A1, Oct. 26, 2023
Int. Cl. G01S 5/02 (2010.01)
CPC G01S 5/0246 (2020.05) [G01S 5/0268 (2013.01); G01S 5/0294 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method for determining a movement state of a user equipment (UE) operating in a radio access network (RAN), the method comprising:
performing positioning measurements on signals received from a plurality of transmission points (TPs) in the RAN, wherein the positioning measurements include:
first measurements of Doppler shift of signals from a first TP, and
second measurements of Doppler shift of signals from a second TP that is spatially separated from the first TP, and
third measurements of signals from a third TP; and
determining a UE movement state based on the positioning measurements and an interacting multiple-model (IMM) that includes:
a first almost-constant velocity model,
a second maneuver velocity model, and
a Doppler shift bias state common to the first and second models.