Study Of Fiber Ethernet Interface Technology Base On CCSDS Protocal For Spacecraft Application

At present,spacecraft onboard equipments and branch systems are connected by different kinds of bus and serial interface,so spacecraft onboard software and hardware can’t be reused.Therefore,standard spacecraft onboard interface is needed.At the same time,fiber optic Ethernet is more and more applied to civil communication.And it can satisfy the complicated spacecraft like space station.Spaceborne LAN needs for fiber optic Ethernet.Ethernet is one of LANs recommended by the SOIS.Under the background of the SOIS,the fiber optic Ethernet interface is researched in paper.Firstly,the basic principles of optical fiber communication and Ethernet are introduced.The principles and forms of optical transmitter,optical receiver and transceiver are all be emphasized analyzed.Again,a transceiver is designed.Based on optical fiber communication are combined with Ethernet,two schemes of the fiber optic Ethernet interface module are designed.And the scheme with SPI-3 is implemented.After the waveform simulations and test in the hardware,the testing results indicate that the Ethernet interface module is able to satisfy the project.Secondly,Giga-Ethernet is emphasized analyzed.Based on the Giga-Ethernet,backbone network topology of spaceborne LAN are designed and analyzed.The key technologies of spaceborne Giga-Ethernet are described.Thirdly,the development and research of SOIS are introduced.Based on the reference model of SOIS,every layer’s function and characteristic are analyzed,and the application services are discussed.Finally,the applications of fiber optic Ethernet and SOIS to spaceflight are discussed.