Before revision: A TCU consists of: a Global Positioning System (GPS) unit, which keeps track of the latitude and longitude values of the vehicle; an external interface for mobile communication (GSM, GPRS, Wi-Fi, WiMax, or LTE), which provides the tracked values to a centralized Geographical Information System (GIS) database server; an electronic processing unit; a microcontroller, in some versions; a microprocessor or field programmable gate array (FPGA), which processes the information and acts on the interface between the GPS; a mobile communication unit; and some amount of memory for saving GPS values in case of mobile-free zones or to intelligently store information about the vehicle's sensor dat
After revision: A TCU consists of: a Global Positioning System (GPS) unit, which keeps track of the latitude and longitude values of the vehicle; an external interface for mobile communication (GSM, GPRS, Wi-Fi, WiMax, or LTE), which provides the tracked values to a centralized Geographical Information System (GIS) data.abase server; an electronic processing unit; a microcontroller, in some versions; a microprocessor or field programmable gate array (FPGA), which processes the information and acts on the interface between the GPS; a mobile communication unit; and some amount of memory for saving GPS values in case of mobile-free zones or to intelligently store information about the vehicle's sensor dat