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RadiaLE: A framework for designing and assessing link quality estimators in wireless sensor networks
Ref: HURRAY-TR-110601       Publication Date: Sep 2011

Abstract:
Stringent cost and energy constraints impose the use of low-cost and low-power radio transceivers in large-scale wireless sensor networks (WSNs). This fact, together with the harsh characteristics of the physical environment, requires a rigorous WSN design. Mech- anisms for WSN deployment and topology control, MAC and routing, resource and mobility management, greatly depend on reliable link quality estimators (LQEs). This paper describes the RadiaLE framework, which enables the experimental assessment, design and optimization of LQEs. RadiaLE comprises (i) the hardware components of the WSN testbed and (ii) a software tool for setting-up and controlling the experiments, automating link measurements gathering through packets-statistics collection, and analyzing the col- lected data, allowing for LQEs evaluation. We also propose a methodology that allows (i) to properly set different types of links and different types of traffic, (ii) to collect rich link measurements, and (iii) to validate LQEs using a holistic and unified approach. To demon- strate the validity and usefulness of RadiaLE, we present two case studies: the character- ization of low-power links and a comparison between six representative LQEs. We also extend the second study for evaluating the accuracy of the TOSSIM 2 channel model.

Nouha Baccour

,

Anis Koubâa

,

Maissa ben Jamâa

,

Denis Rosário

,

Habib Youssef

,

Mário Alves

,

Leandro Becker

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