US 12,267,753 B2
Information processing device, information processing method, computer program product, and information processing system
Sakie Nagakubo, Kawasaki Kanagawa (JP); Hiroki Kudo, Kawasaki Kanagawa (JP); and Yasuyuki Tanaka, Kawasaki Kanagawa (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed on Aug. 30, 2022, as Appl. No. 17/823,165.
Prior Publication US 2023/0239666 A1, Jul. 27, 2023
Int. Cl. H04W 4/38 (2018.01); G06F 11/30 (2006.01); H04W 84/18 (2009.01)
CPC H04W 4/38 (2018.02) [G06F 11/3089 (2013.01); H04W 84/18 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An information processing device comprising:
one or more hardware processors configured to:
receive, from each of communication devices connected to a network, communication data including sensor data and time information, the sensor data indicating a result of measurement by a sensor mounted on each of the communication devices, the time information indicating a measurement time of the sensor data;
specify, as event communication data, the communication data including event sensor data being the sensor data of an event simultaneously occurring in the network;
calculate a time delay amount among the communication devices on the basis of the event sensor data and the time information, each being included in the event communication data of each communication device; and
correct the time information of the sensor data included in the communication data on the basis of the delay amount,
wherein the one or more hardware processors are further configured to:
set a reference communication device serving as a reference among the communication devices and the information processing device,
calculate, as the delay amount, a time difference between reference time information and the time information, the reference time information being the time information included in the event communication data received from the reference communication device, the time information being included in the event communication data received from each of the communication devices, and
calculate, as the delay amount, a duration from a time at which a cross correlation function of a reference sensor waveform and a sensor waveform has the highest value to a time of a starting point of the reference sensor waveform, the reference sensor waveform indicating a relation between a time and sensor intensity expressed by the event sensor data and the reference time information that are included in the event communication data received from the reference communication device, the sensor waveform indicating a relation between a time and sensor intensity expressed by the event sensor data and the time information that are included in the event communication data received from the communication device.