In-vehicle device, management device, deterioration determination method, change factor discrimination method, abnormality factor discrimination method, and storage medium for network path deterioration detection in vehicles

Abstract

An in-vehicle device includes: a measurement unit configured to measure a characteristic of a transmission path in an in-vehicle network mounted to the vehicle; an acquisition unit configured to acquire deterioration information which is information regarding deterioration of the transmission path and which corresponds to the characteristic measured by the measurement unit; and a determination unit configured to determine a deterioration degree of the transmission path, based on the characteristic measured by the measurement unit and the deterioration information acquired by the acquisition unit.