Scheduling Design and Analysis for End-to-End Heterogeneous Flows in an Avionics Network

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Executive Summary

Avionics Full DupleX (AFDX) Switched Ethernet technology provides a deterministic network with guaranteed service to support real-time data transmission in real-world avionics applications. The determinism provides a worst-case upper bound of end-to-end transmission delays of Virtual Links (VLs) that are often assumed to be homogeneous and have similar transmission requirements. However, performing the analysis of end-to-end delays of heterogeneous flows remains an open problem. This paper derives end-to-end delay bounds of transmitting heterogeneous flows, including avionics, multimedia (video & audio) and best-effort data flows, in an AFDX network that uses Deficit Round Robin (DRR) scheduling policy on switch output ports.

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