Service Oriented Vehicle Diagnostic Communication and Regulations
SAE-PP-00283
06/27/2022
- Content
- Next generation vehicle electrical architectures will be based on highly sophisticated domain controllers called HPCs (High Performance Computational nodes). These HPCs are more like gaming PCs or advanced mobile phones and not as the traditional ECUs as we know it. Today’s diagnostic communication protocol, e.g. UDS (ISO 14229-1) was developed for ECUs and is not fit to be used for HPCs. There is a new protocol being developed within ASAM, SOVD (Service Oriented Vehicle Diagnostics) which is based on a REST-ful API sent on http. But OBD under the emissions regulation is not yet updated for this shift of protocols and therefore must vehicle manufacturers support older OBD protocols (e.g. SAE J1979-2) during the transition phase. Another problem is that some of the software packages may fall under the DEC-ECU definition and need to communicate to an OBD scan tool.
- Citation
- Pauli, J., "Service Oriented Vehicle Diagnostic Communication and Regulations," SAE MobilityRxiv™ Preprint, submitted June 27, 2022, https://doi.org/10.47953/SAE-PP-00283.