Fail-Safe Sidelink Heartbeats, Black Channel SIL 3 and Autonomous Loss-of-Link Fallbacks

Safety communication principles adhering to IEC 61784-3, ensuring deterministic vehicle shutdown or autonomous return-to-base on telemetry severance.

IEC 61784-3 Black Channel Safety Architecture

Safety frames encapsulate sequence counters, timestamp parity, and dual CRC-32 checksums within the application layer, guaranteeing SIL 3 integrity regardless of packet corruption or loss across untrusted radio channels.

Deterministic Loss-of-Link Autonomous Fallbacks

If the safety heartbeat is interrupted for longer than 150 ms, the vehicle automatically initiates a three-stage mitigation strategy: controlled deceleration, hazard light activation, and transition to a pre-computed reverse backtrack path.

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