US 11,991,597 B2
Systems and methods for transportation mode determination using motion
Brad Cordova, Cambridge, MA (US); and Sushrut Karnik, Somerville, MA (US)
Assigned to Cambridge Mobile Telematics Inc., Cambridge, MA (US)
Filed by CAMBRIDGE MOBILE TELEMATICS INC., Cambridge, MA (US)
Filed on Nov. 15, 2022, as Appl. No. 17/987,662.
Application 17/987,662 is a continuation of application No. 17/220,886, filed on Apr. 1, 2021, granted, now 11,546,733.
Application 17/220,886 is a continuation of application No. 16/542,544, filed on Aug. 16, 2019, granted, now 10,993,080, issued on Apr. 27, 2021.
Claims priority of provisional application 62/720,689, filed on Aug. 21, 2018.
Prior Publication US 2023/0143632 A1, May 11, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 4/029 (2018.01); H04M 1/02 (2006.01); H04W 4/02 (2018.01)
CPC H04W 4/029 (2018.02) [H04M 1/0202 (2013.01); H04M 2250/12 (2013.01); H04W 4/027 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
obtaining motion data from one or more sensors of a mobile device during a trip;
acquiring speed data from a sensor of the one or more sensors of the mobile device during the trip;
correlating, by a processor, the motion data to the speed data to separate the motion data into one or more groupings based on the speed data;
performing, by the processor, a spectral analysis on magnitudes of the motion data for each of the one or more groupings to obtain a set of frequency components;
calculating, by the processor, an energy for each frequency component of the set of frequency components obtained from the spectral analysis;
comparing, by the processor, the energy of each frequency component of the set of frequency components to one or more baseline values for each frequency component to generate a set of differences; and
determining, by the processor, a transportation mode used for the trip based on one or more differences from the set of differences.