US 12,413,287 B2
Doppler-based beam training interval adaptation
Andrea Bedin, Espoo (FI); Paolo Baracca, Munich (DE); Karthik Upadhya, Espoo (FI); Mikko Aleksi Uusitalo, Espoo (FI); and Martti Johannes Moisio, Espoo (FI)
Assigned to Nokia Solutions and Networks Oy, Espoo (FI)
Filed by Nokia Solutions and Networks Oy, Espoo (FI)
Filed on Nov. 2, 2023, as Appl. No. 18/500,475.
Claims priority of application No. PCT/IB2022/061497 (WO), filed on Nov. 28, 2022.
Prior Publication US 2024/0178902 A1, May 30, 2024
Int. Cl. H04B 7/06 (2006.01); H04B 7/185 (2006.01)
CPC H04B 7/06958 (2023.05) [H04B 7/1855 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A first apparatus comprising:
at least one processor; and
at least one memory including computer program code;
the at least one memory and the computer program code configured to, with the at least one processor, cause the first apparatus at least to perform:
obtaining predicted Doppler spectrum information for a propagation channel between a first terminal device and one of an access node or a second terminal device calculated using a radio-aware digital twin for a physical environment, wherein the physical environment comprises the first terminal device, the one of the access node or the second terminal device and one or more terminal devices capable of movement under control of the radio-aware digital twin and the predicted Doppler spectrum information includes at least information on one or more Doppler frequencies of a predicted Doppler spectrum resulting from reflections from at least one of the one or more terminal devices;
causing performing of measurements of one or more reference signals by a device associated with the propagation channel over the propagation channel to form a channel estimate, wherein the device associated with the propagation channel is the first terminal device or the one of the access node or the second terminal device;
calculating a measured Doppler spectrum based on the channel estimate;
filtering out the one or more Doppler frequencies of the predicted Doppler spectrum from the measured Doppler spectrum; and
adjusting a beam refinement interval of the device associated with the propagation channel based on the filtered measured Doppler spectrum or at least a part thereof.