Table of Contents
ISRN Communications and Networking
Volume 2012, Article ID 180369, 10 pages
http://dx.doi.org/10.5402/2012/180369
Research Article

Experimental Performance Evaluation of POBICOS Middleware for Wireless Sensor Networks

Converging Networks Laboratory, VTT Technical Research Centre of Finland, Kaitoväylä 1, 90590 Oulu, Finland

Received 13 December 2011; Accepted 16 January 2012

Academic Editors: N. Abu-Ghazaleh, Y. Jiang, R. Montemanni, and S. Weller

Copyright © 2012 Jouni Hiltunen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The advances in the theory of wireless sensor networks have been remarkable during the past decades, but there is a lack of extensive experimental evaluations. In this paper we present performance-evaluation methods and results for POBICOS (platform for opportunistic behaviour in incompletely specified, heterogeneous object communities), which is an advanced middleware for wireless sensor networks (WSNs). The measurements concern energy consumption, duty cycle, and OS task profiling as well as communication characteristics such as round trip time (RTT) and throughput. In addition, a bandwidth analysis during a long-term experiment of fully functional POBICOS network and application is studied. Based on the evaluation results, power mode and data cache improvements are presented as well as CPU clock frequency optimizations.