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Proceedings Paper

Congestion control in BACnet networks based on RPRED algorithm
Author(s): Shubin Wu; Xiande Liu; Zhongming Wang
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Paper Abstract

BACnet is an open building automation and control network protocol used extensively in building automation and control systems. To guarantee security and reliability of BACnet network, congestion control is important in BACnet network. Considering BACnet router's out-port rate and packet's priority, this paper proposes a rate based priority random early detection (RPRED) algorithm to realize congestion control in BACnet network. RPRED algorithm detects congestion according to the average queue length, and estimates congestion trend according to relationship between packets arriving rate and out-port rate. In congestion control, RPRED randomly drop packets and manage queue according to packets' priority. These features of RPRED algorithm ensure the security and reliability of BACnet network. Some experimental investigation was undertaken to compare RPRED algorithm with conventional Drop Tail algorithm. Test result shows that when traffic load increased in BACnet network, RPRED algorithm could decrease time delay and drop ratio of high priority BACnet packets.

Paper Details

Date Published: 6 December 2005
PDF: 8 pages
Proc. SPIE 6022, Network Architectures, Management, and Applications III, 602218 (6 December 2005); doi: 10.1117/12.635683
Show Author Affiliations
Shubin Wu, Huazhong Univ. of Science and Technology (China)
Xiande Liu, Huazhong Univ. of Science and Technology (China)
Zhongming Wang, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 6022:
Network Architectures, Management, and Applications III
Kwok-wai Cheung; Gee-Kung Chang; Guangcheng Li; Ken-Ichi Sato, Editor(s)

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