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Volume 42 Issue 10
Oct.  2016
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Journal of Beijing University of Aeronautics and Astronautics  > 2016  >  42(10): 2258-2264.
YANG Jingzhong, GE Hongjuan, WU Shuang, et al. Short-frame prior scheduling with weighted round robin transmission strategy in AFDX terminal system[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(10): 2258-2264. doi: 10.13700/j.bh.1001-5965.2015.0664(in Chinese)
Citation: YANG Jingzhong, GE Hongjuan, WU Shuang, et al. Short-frame prior scheduling with weighted round robin transmission strategy in AFDX terminal system[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(10): 2258-2264. doi: 10.13700/j.bh.1001-5965.2015.0664(in Chinese)
shu

Short-frame prior scheduling with weighted round robin transmission strategy in AFDX terminal system

doi: 10.13700/j.bh.1001-5965.2015.0664

  • College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

Funds:  National Natural Science Foundation of China (U1233127)
  • Received Date: 14 Oct 2015
  • Publish Date: 20 Oct 2016
    Abstract
  • A new scheduling strategy of terminal system virtual link (VL) is put forward, which is based on the short-frame prior scheduling and integrated with weighted round robin (WRR).The new approach ensures the priority of the important short-frame and balances the delay upper bound of other different priority signals. Based on the theory of network calculus, the paper derives the delay upper bound of different virtual links through the new combinatorial scheduling strategy and researches the relation among the maximum delay upper bound, weight ratio and frame length. The Avionics Full Duplex Switched Ethernet (AFDX) network model based on OPNET is established, and the terminal system data transmission delay under the three scheduling strategies is simulated and compared. The results show that the new scheduling strategy can reduce the maximum delay time of short-frame virtual link, and improve the processing bandwidth of relatively important task in long-frame data transmission. It is feasible and applicable to airborne system network with more short-frame and different priority data flow.

     

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