中国空间科学技术

›› 2016, Vol. 36 ›› Issue (6): 62-69.doi: 10.16708/j.cnki.1000-758X.2016.0063

Previous Articles     Next Articles

Apre-emptiblereal-timeSpaceWireon-boardnetwork

WU  Zhong-Jie1, LIU  Jiang-Lan2, SONG  Wei3, YU  Jun-Jie3, LIN  Jing-Ming3, ZHAO  Zhan-Feng4，*   

  1. 1SchoolofElectronicsandInformationEngineering,HarbinInstituteofTechnology，Harbin150001,China
    2ShanghaiInstituteofAerospaceSystemEngineering,Shanghai201109,China
    3ShandongInstituteofAerospaceElectronicsTechnology,Yantai264003,China
    4SchoolofInformationandElectricalEngineering,HarbinInstituteofTechnology, Weihai, Weihai264209,China
  • Received:2016-05-18 Revised:2016-06-29 Published:2016-12-25 Online:2016-08-22

PDF (PC)

795

Abstract: Tobuildunifiedon-boardcommunicationinfrastructurebasedonSpaceWrie,researchshouldbedonetoguaranteethedeterministicandreal-timeperformanceofmessagetransmission.Toovercomethelackofflexibilityintraditionaltime-triggeredcommunication,amodifiedtime-triggeredSpaceWirenetworkwhichsupportedthebroadcastingofcommunicationtasktransmissionidentifierwasproposed.Onthisbasis,anon-destructivepre-emptiblecommunicationmechanismwasbuiltandtheapplicationofclassicalprocessorreal-timeschedulingalgorithmtocommunicationtaskschedulingwasdiscussed.Atlast,thetransmissiondelayperformancewasanalyzedandcomparedamongevent-triggered,traditionaltime-triggeredandnon-blockingreal-timeSpaceWirecommunicationmechanisms.Theresearchshowsthatthiscommunicationmechanismcanreducetheworst-caseend-to-enddelay,andissuitedfortheschedulingofcommunicationtaskswithvariouspriorities.

Key words: onboardnetwork, SpaceWire, preemptible, realtime, deterministic