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Designing of Network based Tiny Ubiquitous Networked Systems  

Hwang, Kwang-Il (시립인천전문대학 컴퓨터제어과)
Eom, Doo-Seop (고려대학교 전자공학과)
Publication Information
Journal of KIISE:Computing Practices and Letters / v.13, no.3, 2007 , pp. 141-152 More about this Journal
Abstract
In this paper, we present a network-oriented lightweight real-time system, which is composed of an event-driven operating system called the Embedded Lightweight Operating System (ELOS) and a generic multi hop ad hoc routing protocol suite. In the ELOS, a conditional preemptive FCFS scheduling method with a guaranteed time slot is designed for efficient real-time processing. For more elaborate configurations, we reinforce fault tolerance by supplementing semi-auto configuration using wireless agent nodes. The developed hardware platform is also introduced, which is a scalable prototype constructed using off-the-shelf components. In addition, in order to evaluate the performance of the proposed system, we developed a ubiquitous network test-bed on which several experiments with respect to various environments are conducted. The results show that the ELOS is considerably favorable for tiny ubiquitous networked systems with real-time constraints.
Keywords
Embedded Systems; Operating Systems; Real-time Systems; Ubiquitous Computing;
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