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Contention-free Scheduling for Safety-critical Tasks in AFDX Network
WANG Weizhen, LI Jian, Hu Fei
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Funding: RFDP（No.20100073120027）, MOST（No.2010DFA11390）
Opened online:21 December 2012
Accepted by: none
Citation: WANG Weizhen, LI Jian, Hu Fei.Contention-free Scheduling for Safety-critical Tasks in AFDX Network[OL]. [21 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4503067
 
 
AFDX is an emerging avionics bus for next generation aircraft. It is based on IEEE 802.3 Ethernet technology and utilizes commercial off-the-shelf (COTS) components. The delay performance is one of the main aspects of aviation network design, but the currently research about the end-to-end delay analysis for an AFDX data network is very pessimistic due to provisioning for the worst-case. This article focuses on improving the AFDX end-to-end delay performance. With stricter constraints on AFDX, a scheduling algorithm is designed to guarantee that critical tasks are conflict-free, it combines binary search with a worst match algorithm based on pinwheel to separate the start time of every safety-critical task. Due to this, the end-to-end delay for safety-critical tasks is shorter and the performance can be improved. A simulation is built and the result proves that the end-to-end delay performance is improved and our solution is useful.
Keywords:AFDX; Pinwheel; Contention-Free; Crossbar; End-to-End delay
 
 
 

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