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A design-diversity based fault-tolerant COTS avionics bus network

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3 Author(s)
Chau, S.N. ; Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA ; Smith, J. ; Tai, A.T.

The paper describes a COTS bus network architecture consisting of the IEEE 1394 and SpaceWire buses. This architecture is based on the multi-level fault tolerance design methodology proposed by S.N. Chau et al. (1999) but has much less overhead than the original IEEE 1394/I2C implementation. The simplifications are brought about by the topological flexibility and high performance of the SpaceWire. The SpaceWire can form a connected graph that embeds multiple spanning trees. This is a significant advantage because it allows the IEEE 1394 bus to select a different tree topology when a fault occurs. It also has sufficient performance to stand in for the IEEE 1394 bus during fault recovery, so that a backup IEEE 1394 bus is no longer required. These two buses are very compatible at the physical level and therefore can easily be combined. Analysis of the effectiveness of the IEEE 1394/SpaceWire architecture shows that it can achieve the same fault tolerance capability as the IEEE 1394/I2 C architecture with less redundancy

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Dependable Computing, 2001. Proceedings. 2001 Pacific Rim International Symposium on

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