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�������պ����ѧѧ�� 2010, Vol. 36 Issue (12) :1412-1416    DOI:
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��֤���ʵ�AFDX������ʵʱ�����㷨
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Real time scheduling algorithm based on rate-guaranteed in AFDX switch
Zhang Yongtao, Huang Zhen, Xiong Huagang*
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ ���AFDX(Avionics Full Duplex Switched Ethernet)����ؼ�����——������ʵʱ�����㷨,���һ�ֱ�֤���ʵ����ȼ�ʵʱ�����㷨(PRTRG,Priority Real Time scheduling algorithm based on Rate-Guaranteed),�����������������۷����˴˵����㷨��ʵʱ��.��AFDX�������������,��(FIFO,First In First Out)������з����Ա�,֤��PRTRG�㷨��Ч�ؼ����˸����ȼ����ݵĶ˵����ӳ��Ͻ�,ͬʱ��֤�˵����ȼ����ݶ˵����ӳٵ�ȷ����,������ֹ��������ӵ������ɢ,�ڽ������ڲ�ʵ������������.
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Abstract�� Real time scheduling algorithm used in avionics full duplex switched Ethernet (AFDX) switches was studied, which is a key technique in AFDX. A priority real time scheduling algorithm based on rate-guaranteed(PRTRG) was proposed. Real time performance of PRTRG was analyzed using network calculus theory. Upper delay bounds with first in first out(FIFO) scheduling under a typical topology configuration were compared. The results confirm that PRTRG algorithm can effectively decrease the upper delay bounds of high priority data without losing the determinism of low priority data. At the same time, PRTRG algorithm prevents the congestion of one flow from spreading to another, and isolates the flow in the switch.
Keywords�� avionics   Ethernet   real time systems   switches   scheduling algorithms   network performance     
Received 2009-11-05;
About author: ������(1983-),��,���������,��ʿ��,zhangyongtao394@ee.buaa.edu.cn.
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������, ����, �ܻ���.��֤���ʵ�AFDX������ʵʱ�����㷨[J]  �������պ����ѧѧ��, 2010,V36(12): 1412-1416
Zhang Yongtao, Huang Zhen, Xiong Huagang.Real time scheduling algorithm based on rate-guaranteed in AFDX switch[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2010,V36(12): 1412-1416
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