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Abstract To achieve dependable real-time operation To achieve dependable real-time operation in Wireless Sensor Networks (WSNs) we previously proposed a general technique based on non-parametric stochastic analysis. Such technique allows one to overcome the communication uncertainties that are intrinsic to wireless and dynamic environments, and to offer probabilistic real-time guarantees, by continually monitoring and adapting to environment conditions. An underlying assumption of the proposed technique is that the system can recognize changes in the state of the environment quickly enough, compared to the rate at which those changes occur. In this paper we effectively evaluate the validity of such an assumption, in WSNs based on the 802.15.4 networking standard. We present results from various simulation scenarios, as well as from a real network, and conclude that monitoring and adaptation can dependably provide probabilistic real-time guarantees in 802.15.4-based WSNs, in the presence of realistic network dynamics. he presence of realistic network dynamics.
Author Luís Marques + , António Casimiro +
Institution Department of Informatics, University of Lisbon  +
Key Marques2012TR04  +
Month jul  +
Note  +
NumPubDate 2,012.07  +
Project Project:KARYON +
ResearchLine Timeliness and Adaptation in Dependable Systems (TADS) +
Title Evaluating Lightweight Dependable Adaptation in 802.15.4 Wireless Sensor Networks  +
Type techreport  +
Year 2012  +
Has improper value forThis property is a special property in this wiki. Url  +
Categories Publication  +
Modification dateThis property is a special property in this wiki. 21 January 2013 19:29:23  +
NumberThis property is a special property in this wiki. 12--04  +
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