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With the gradual deepening of space exploration, spaceborne equipment, especially imaging payload, and continuously improve the capacity requirements of real-time transmission of data in orbit. Very low so that the data transfer rate of the first generation of spaceborne data bus has been far from being able to meet the needs of real-time transmission of satellite data. IEEE1394 bus in recent years, NASA recommended spaceborne high-speed bus. As the upgrade version of the 1394 bus, IEEE1394b bus in addition to have many advantages, but also greatly improve the transfer speed of the bus, in particular the transmission distance. Domestic and international aerospace, and even the field of aviation and land weaponry, 1394b bus to give a high degree of concern. Therefore, to carry out the 1394b bus applications research spacecraft has important significance. In this paper, on the basis of the full research study the the 1394b bus communication protocols and topologies, master the 1394b bus terminal, hardware and software design techniques, developed the principle of spaceborne 1394b bus terminal prototype. In addition, the article also includes the the 1394a bus related research. In this paper, the specific research: (1) research the various prospects for aerospace applications, high-speed bus, and a comparative analysis, in particular, analyze and summarize the advantages of 1394b bus. (2) IEEE1394a, IEEE1394b bus communication protocols, and key research the IEEE1394b relative to 1394a bus improvements, including by arbitration, signal encoding, topology. Proposed a new topology, and failure analysis. (3) 1394b bus interface device designed and implemented, on this basis, in order to meet the high-reliability applications in areas such as aerospace or military requirements, developed a prototype dual redundancy embedded spaceborne the 1394b bus terminal principle; ( 4) Build a simple IEEE1394b data network transmission performance tests, carried out on the the bus terminals principle developed prototype, test results to achieve the desired objectives; (5) The design of the interconnection of the the IEEE1394a bus and the three embedded processor interface chip, this technology has been applied for a patent. Of this research work, a preliminary verified 1394b bus excellent performance, and laid the foundation for the complete control of the key technologies of the 1394b bus has some practical reference value. At the same time, the results of this study 1394b bus in China's space vehicle engineering practical useful exploration has inspired and Significance.
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