The Evolution of Aircraft Data Networks

Abstract

This paper presents the evolution of Aircraft Data Networks (ADN)'s. It describes various Avionics data network protocols based on the Avionics systems architecture. The paper describes the evolution from a simple point-to-point protocol presented in ARINC 429 to a shared data bus protocol presented in ARINC 629. Finally, the new Data network based on AFDX (Avionics Full-duplex Ethernet) is discussed. AFDX is a new standard based on Ethernet technology and able to handle today's requirements. A brief comparison between the three different protocols is presented. The comparison shows that AFDX provides better performance and flexibility without losing the compliance with safety, redundancy and reliability of Avionics requirements General TermsAvionics Data Buses, protocols.

Verification and Validation Framework for AFDX Avionics Networks

“…Additionally, there is usually VL redundancy, which means the data of a VL is sent through two different paths simultaneously, typically using two identical networks. The recipient is in charge of managing the redundant packets, usually applying a First-Valid-Wins [51] policy. From a physical link perspective, the packets are duplicated by the redundancy management block and sent through two redundant interfaces using two message authentication code (MAC) interfaces, generically named as MAC A and MAC B.…”