›› 2016, Vol. 36 ›› Issue (6): 77-82.doi: 10.16708/j.cnki.1000-758X.2016.0071

Previous Articles    

Realtimeschedulingbasedontimetriggered1553Bbus

 ZHAN  Pan-Pan, GUO  Jian*, LIU  Xin   

  1. BeijingInstituteofSpacecraftSystemEngineering,Beijing100094,China
  • Received:2016-08-04 Revised:2016-10-25 Online:2016-12-25 Published:2016-11-24

Abstract: Inordertooptimizetheperformanceof1553Bbustransmission,reducethewaitingtimeafterthemessagestransmission,andimprovethebusbandwidthutilizationandtherealtimeperformanceofemergencymessagesresponse,the1553Bbusschedulingmethodswerestudied,andarealtimeschedulingmethodbasedonthetimetriggered1553Bbuswasdesignedbyusingthemethodofperiodicschedulingandpreemptivescheduling.Onthebasisoftimetrigger,busmessageswerecentrallyscheduledbypriority.Duringthetimethebusframewastransmittedonthebus,theprocessorcouldcontinueprocessingothertaskswithoutwaitingforsometime.Basedonthecharacteristicofbusdataareapartition,thepreemptiveschedulingstrategyforemergencymessagestointerruptcommonmessagestransmissionwasdesigned.Nonimportantdatadidn′ttakeupthebuschannelforalongtime,sothatemergencymessageswerequicklyresponded.Theexperimentalresultsshowthattheproposedmethodcanachievethemaximumcapacityofbustransmission.Itcanimprovethetransmissionefficiencyandbandwidthutilizationof1553Bbus,whiletheresponsetimeofemergencymessagesisstablewithin2ms.

Key words: 1553Bbus, periodic, preemptivescheduling, priority, timetriggered