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Telematic control unit
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<p>A telematic control unit (TCU) in the <a href="/facts/Automotive_industry/fGFKUIlA">automobile industry</a> is the <a href="/facts/Embedded_system/a4muX1wU">embedded system</a> on board a vehicle that wirelessly connects the vehicle to cloud services or other vehicles via <a href="/facts/Vehicle-to-everything/B3JKw4r4">V2X standards</a> over a <a href="/facts/Cellular_network/8zA0jQJ9">cellular network</a>. The TCU collects telemetry data from the vehicle, such as <a href="/facts/Satellite_navigation/lVgPlF5v">position</a>, speed, engine data, connectivity quality, etc., from various sub-systems over data and control busses. It may also provide in-vehicle connectivity via <a href="/facts/Wi-Fi/u94quCsx">Wifi</a> and <a href="/facts/Bluetooth/sWAjpMrj">Bluetooth</a> and implements the <a href="/facts/ECall/J3S9jv8Y">eCall</a> function when applicable. </p><p>In the automotive domain, a TCU can also be a <a href="/facts/Transmission_control_unit/qxUzYmmE">transmission control unit</a>. </p><p>A TCU consists of: </p> <ul><li>A <a href="/facts/Satellite_navigation/lVgPlF5v">satellite navigation</a> (GNSS) unit, which keeps track of the <a href="/facts/Latitude/IBYqkjhU">latitude</a> and <a href="/facts/Longitude/HsC61ML9">longitude</a> values of the vehicle</li> <li>An external interface for mobile communication (<a href="/facts/GSM/Sw8QYaLE">GSM</a>, <a href="/facts/GPRS/c4SJD7ov">GPRS</a>, <a href="/facts/Wi-Fi/u94quCsx">Wi-Fi</a>, <a href="/facts/WiMax/tz9zpKHU">WiMax</a>, <a href="/facts/LTE_(telecommunication)/72QhwXHT">LTE</a> or <a href="/facts/5G/yVb460m4">5G</a>), which provides the tracked values to a centralized <a href="/facts/Geographical_information_system/PoP1kVoa">geographical information system</a> (GIS) database server</li> <li>An electronic processing unit</li> <li>A <a href="/facts/Microcontroller/MKrnAhnm">microcontroller</a>, <a href="/facts/Microprocessor/Fx9CaQht">microprocessor</a>, or <a href="/facts/Field_programmable_gate_array/M8LSGcAU">field programmable gate array</a> (FPGA) which processes the information and acts as an interface to the GPS</li> <li>A mobile communication unit</li> <li>Memory for saving GPS values in mobile-free zones or to intelligently store information about the vehicle's sensor data</li> <li>A battery module</li></ul>