US 12,392,859 B2
Line of sight detection based on channel impulse response reported
Satyam Dwivedi, Solna (SE); Jonas Medbo, Uppsala (SE); Henrik Asplund, Stockholm (SE); Erik Stare, Sollentuna (SE); Per Ernström, Stockholm (SE); and Deep Shrestha, Linköping (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/609,468
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Apr. 15, 2020, PCT No. PCT/IB2020/053562
§ 371(c)(1), (2) Date Nov. 8, 2021,
PCT Pub. No. WO2020/229902, PCT Pub. Date Nov. 19, 2020.
Claims priority of provisional application 62/848,119, filed on May 15, 2019.
Prior Publication US 2022/0229143 A1, Jul. 21, 2022
Int. Cl. G01S 5/00 (2006.01); G01S 5/02 (2010.01)
CPC G01S 5/0036 (2013.01) [G01S 5/0236 (2013.01); G01S 5/0246 (2020.05); G01S 5/0273 (2013.01); G01S 5/0278 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method in a network node to determine line of sight (LOS) (LOS) base stations for a user equipment (UE) the method comprising:
transmitting a request to at least one of the UE and a plurality of base stations to measure and report LOS detection measurements, wherein the plurality of base stations includes base stations of a serving cell of the UE;
receiving the LOS detection measurements from the at least one of the UE and the plurality of base stations, wherein the LOS detection measurements includes a channel impulse response and further includes:
a relative strength of a first peak of a power delay profile (PDP) of the channel impulse response, wherein the PDP represents received signal power as a function of time delay, wherein the relative strength of the first peak is determined by comparing the power of a first arriving peak to the power of subsequent peaks of the PDP; and/or
a dynamic range of the first peak of the PDP, wherein the dynamic range is the difference in power between the first peak and a noise floor of the PDP;
determining LOS base stations for the UE based on the LOS detection measurements; and
transmitting an indication of the LOS base stations to the UE.