These days cars have multiple fieldbuses to distribute (less bandwidth) and to seperate (increased security) the happening communication. To realise a controlled communication between the different fieldbuses they use a central gateway (CGW).
Example
ECU_A/C ECU_BCM OBD
| | |
(CAN_Comfort) ----------------|CGW|-------------- (CAN_Infotainment)
| | | | | |
ECU_HUD ECU_IC | | ECU_OCU ECU_HU
| | | | | |
(ETH_Comfort) --------------/ \--------------- (ETH_Infotainment)
- A/C … Air Conditioning
- BCM … Body Control Module
- ECU … Electronic Control Unit
- HU … Head Unit
- HUD … Head Up Display
- IC … Instrument Cluster
- OBD … On-Board Diagnostics
- OCU … Online Connectivity Unit