A Fault-Tolerant Communication Algorithm of ARINC429 Based on Hybrid Redundancy

This paper presents a hybrid redundancy algorithm to improve the fault-tolerance of ARINC429, which synthesize hardware redundancy with dual channels in physical layer and information redundancy with Cycle Redundancy Check (CRC) in data link layer. The concept of failover delay is introduced to analyze the capability of error detection in this algorithm. Validations of this algorithm is obtained through the method called fault injection, which is proved that the algorithm presented here can reduce failover delay to 18 ms in the practical system, and prevent any undetected error with even number of error bits caused by parity check thoroughly.