Abstract

A delay reliability estimation method for Avionics Full Duplex Switched Ethernet based on stochastic network calculus

Highlights

  • Airborne network plays a key role in the integration of modern airplanes

  • The current Stochastic network calculus (SNC) algorithm based on linear deterministic traffic envelop function cannot represent the traffic self-similarity of Avionics full duplex switched Ethernet (AFDX)

  • A stochastic traffic envelope is proposed based on fractional Brownian motion (FBM) model, a common analytical model of Ethernet aggregate traffic, to model the background aggregate traffic in AFDX

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Summary

Introduction

Airborne network plays a key role in the integration of modern airplanes. Avionics full duplex switched Ethernet (AFDX) [4] was developed by Airbus aiming to provide 100Mbps bandwidth with deterministic quality of service, and has been successfully applied in several advanced aircrafts, such as A380, Boeing 787, etc. Stochastic network calculus (SNC) was proposed to provide an elegant framework that can be used to evaluate the delay reliability with traffic randomness [15, 16, 24]. We build a stochastic traffic envelope function, which randomizes the input of SNC, to reflect the self-similarity of AFDX traffic, and propose a new probabilistic algorithm to estimate the delay reliability based on the stochastic envelope functions, which gives a better approximation. This remainder of the paper is organized as follows.

AFDX context
Stochastic network calculus
The stochastic traffic envelope for VLi
Stochastic traffic envelope
Stochastic service envelope
Reliability estimation with the given delay upper bound
Case study
Empirical estimation from test We conducted a test according to the VL11-VL16
Discussion
AIM
Conclusion

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