An optimization dispatch strategy of MVB Master Frames based on Multiple Mechanism

Working with the Multiple Mechanism, Frames of Multifunction Vehicle Bus (MVB) which followed the order and time-limited of Period Polling Table (PPT) could be transmitted rapidly and efficiently. This dispatching mechanism could also adjust the Individual Period (IP) properly and make it meet the technical requirement of mutual communicated MVB devices. Firstly, this paper analyzed the time-limited characteristics of data frames and calculated relative parameters. Then it gived a reasonable configuration to Master Frame Table(MFT); In allowing conditions from telegrame time-limited and Timed Slot (TS), some mechanisam switchover signals, i.e. import controlling signals and outgoing interrupt signals, were cut down in some extent; Finally it studied a bookable dispatching mechanisam, and created a transfer state model. Statistical data from Train Multiple System Information-plat(TMSI), shows that after scheduling optimized, communication reliability improves by 9%~11%.