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