NDLI: Integrated Real-Time Scheduling and Communication with Probabilistic Timing Assurances in Unreliable Distributed Systems

Content Provider	IEEE Xplore Digital Library
Author	Fei Huang Kai Han Ravindran, B. Jensen, E.D.
Copyright Year	2008
Description	Author affiliation: Virginia Tech, Blacksburg (Fei Huang; Kai Han; Ravindran, B.)
Abstract	We consider distributed real-time systems that operate under run-time uncertainties including those on execution times and communication delays, and subject to arbitrary node failures and message losses. We present an integrated real-time scheduling and communication algorithm called real-time scheduling with reliable data delivery (RTSRD) that provides probabilistic end-to-end assurances on distributed task timeliness behaviors in such systems. RTSRD considers distributed tasks with end-to-end timing requirements that are expressed using time/utility functions and the optimality criterion of maximizing the total accrued utility. The algorithm decomposes end-to-end time constraints into local time constraints, and uses local slack time for node-local real-time scheduling and node-to-node real-time communication. We analytically establish RTSRD's properties including probabilistic satisfaction of task time constraints. We also compare RTSRD with a prior algorithm called RTG- L for the same problem. Our comparisons show that RTSRD outperforms RTG-L in terms of timeliness assurances (stronger) and algorithm overhead (lower).
Starting Page	79
Ending Page	88
File Size	396575
Page Count	10
File Format	PDF
ISBN	0769531393
DOI	10.1109/ICECCS.2008.15
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-03-31
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Real time systems Timing Time factors Scheduling algorithm Ad hoc networks Telecommunication network reliability Uncertainty USA Councils Runtime Interference system reliability distributed computing fault tolerance
Content Type	Text
Resource Type	Article

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