NDLI: BPA: a fast packet scheduling algorithm for real-time switched Ethernet networks

Content Provider	IEEE Xplore Digital Library
Author	Jinggang Wang Ravindran, B.
Copyright Year	2002
Description	Author affiliation: Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA (Jinggang Wang; Ravindran, B.)
Abstract	In this paper, we present a MAC-layer packet scheduling algorithm, called BPA, for real-time switched Ethernet networks. BPA considers a message model where trans-node application-level messages have end-to-end timeliness requirements that are specified using Jensen's benefit functions. The objective of BPA is to maximize the aggregate message-level benefit. The algorithm reasons that this objective can be achieved by maximizing aggregate packet-level benefit, where packets of messages are allowed to inherit benefit functions of their parent messages. BPA thus solves a non-preemptive packet scheduling problem. Since this problem is NP-hard, BPA heuristically computes packet schedules to maximize aggregate benefit, incurring a worst-case computational complexity of O(n/sup 2/). This is better than the O(n/sup 3/) complexity of the previously known best algorithm (called CMA) for the same problem. Further, our experimental studies show that BPA performs as good as CMA for a broad set of benefit functions, and significantly outperforms CMA for some benefit functions. Furthermore, we observe that BPA yields lower missed-deadline ratio than CMA when message arrival density increases.
Sponsorship	IACC
Starting Page	159
Ending Page	166
File Size	1029507
Page Count	8
File Format	PDF
ISBN	0769516777
ISSN	01903918
DOI	10.1109/ICPP.2002.1040870
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-08-21
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Scheduling algorithm Packet switching Ethernet networks Multiaccess communication Real time systems Protocols Aggregates Bandwidth Timing Laboratories
Content Type	Text
Resource Type	Article

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