Short-frame Prior Scheduling with WRR Transmission Strategy in AFDX Terminal System
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,ensured the priority of the important short-frame and
balanced the delay upper bound of other different priority signals. Based on
the theory of network calculus, the paper derived the delay upper bound of different
virtual links through the new combinatorial scheduling strategy and researched
the relation among the maximum delay upper bound, weight ratio and frame
length. The AFDX network model based on OPNET is established, the terminal
system data transmission delay under the three scheduling strategy 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 inlong-frame data transmission. Above
all, it is feasible and applicable to airborne network with more shortframe and
different priority data flows.
Author: Yuanyuan Xu
Journal Code: jptkomputergg160024
