Centralised Vehicle Time
A single, trusted time source shared by every ECU in the vehicle. I was the architect responsible for the centralised vehicle time design within the cockpit domain at a leading premium automotive OEM.
The case study
Technologies: time synchronisation (e.g. gPTP / IEEE 802.1AS), automotive Ethernet, multi-ECU architecture, DLT
The challenge
Every ECU has its own clock, and clocks drift apart
Logs from different ECUs can't be lined up
Security events and certificates need trustworthy timestamps
Time-dependent features become fragile
My approach
One authoritative time master that other ECUs follow
Network time synchronisation, typically using industry-standard gPTP
Separating a precise, steady time base from calendar time
Defined behaviour at start-up or when the time source is lost
A consistent sense of time across the vehicle's ECUs
More reliable cross-ECU logs, diagnostics and time-dependent features
Outcome
Balu Pillai
Automotive Solutions Architect
London, United kingdom
contact@balupillai.com
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