Architecting ARINC 664 Part 7 (AFDX) Networks for Commercial Transport Aircraft

Core aerospace engineering and protocols for ARINC 664 AFDX Implementation.

Replacing Legacy Point-to-Point Avionics Wiring

Legacy aircraft utilized thousands of individual ARINC 429 twisted-pair cables, adding immense physical weight and complexity to airframes. Modern aircraft like the Airbus A380 and Boeing 787 transitioned to switched Ethernet backbones via ARINC 664 Part 7 (AFDX).

Deterministic Virtual Links and Fault Containment

AvionicsData configures hardware-enforced Virtual Links: every message stream is assigned an exact maximum frame size and guaranteed transmission interval (BAG). Dual redundant networks (Red A and Red B) ensure that even a physical severed fiber cable results in zero lost telemetry.

Virtual Link (VL) Allocation: Defining static routing trees across redundant network switches.
Bandwidth Allocation Gap (BAG): Regulating packet pacing from 1 ms to 128 ms.
Integrity Checking: Appending sequential sequence numbers to eliminate duplicate packets.
Dual-Redundant Networks: Transmitting identical frames simultaneously across Network A and Network B.

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