OBU : Public <<block>> Block
Created: 19.12.2017 16:14:13
Modified: 22.02.2018 09:58:19
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An on-board unit<br/>is a sub-system attached to a car and needed for driver assisted<br/>applications to inform / advise a driver via a HMI. The OBU provides the<br/>vehicle-based processing, storage, and communications functions<br/>necessary to support connected vehicle operations. The radio(s) supporting<br/>V2V and V2I communications are a key component of the Vehicle OBU.<br/>Four different types of implementations are represented by the Vehicle<br/>OBU:<br/><br/>a. Vehicle Awareness Device – This is an aftermarket electronic<br/>device, installed in a vehicle without connection to vehicle systems<br/>and is only capable of sending the basic safety message overshort-range communications. Vehicle awareness devices do not<br/>generate warnings;<br/><br/>b. Aftermarket Device – This is an aftermarket electronic device,<br/>installed in a vehicle, and capable of sending and receiving<br/>messages over a wireless communications link. The self-contained<br/>device includes GPS, runs connected vehicle applications, and<br/>includes an integrated driver interface that issues audible or visual<br/>warnings, alerts, and guidance to the driver of the vehicle;<br/><br/>c. Retrofit Device – This is an electronic device installed in vehicles by<br/>an authorized service provider, at a service facility after the vehicle<br/>has completed the manufacturing process (retrofit). This type of<br/>device provides two-way communications and is connected to a<br/>vehicle data bus to integrate the device with other on-board<br/>systems. Depending on implementation, the device may include an<br/>integrated driver interface and GPS or integrate with modules on<br/>the vehicle bus that provides these services;<br/><br/>d. Integrated System – This is a system of one or more electronic<br/>devices integrated into vehicles during vehicle production. The<br/>Integrated System is connected to proprietary data busses to share<br/>information with other on-board systems. The Integrated System<br/>may include many control modules.<br/><br/>[Towards an Architecture for Cooperative-Intelligent TransportSystem (C-ITS) Applications in the Netherlands]<br/><br/>
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«block» Vehicle System
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«block» Vehicle System
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Element Source Role Target Role
«block» Vehicle V2V Safety System
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Property Value
_defaultDiagramType: SysML1.3::InternalBlock
Object Type Connection Direction Notes
«DFD_External» Map System External Dependency From  
«block» On-Board Unit (OBU) Block Generalization To  
«block» Vehicle System Block Strong To  
«block» On Board Unit Block Generalization To  
«block» Vehicle Intelligent transport Sub-system Block Generalization To  
Vehicle Manufacturer Actor Dependency From