Authors: Waqaas Munawar; Muhammad Hamad Alizai; Olaf Landsiedel; Klaus Wehrle
Addresses: Karlsruhe Institute of Technology, P.O. Box 3640, Karlsruhe 76021, Germany ' Department of Computer Science, LUMS SBASSE, 54792 Lahore, Pakistan ' Chalmers University of Technology, SE-412 96 Göteborg, Sweden ' RWTH Aachen University, Aachen 52074, Germany
Abstract: Wireless sensor networks are envisioned to be deployed in the absence of permanent network infrastructure and in environments with limited or no human accessibility. Hence, such deployments demand mechanisms to remotely (i.e., over the air) reconfigure and update the software on the nodes. In this paper we introduce DyTOS, a TinyOS based remote reprogramming approach that enables the dynamic exchange of software components and thus incrementally update the operating system and its applications. The core idea is to preserve the modularity of TinyOS, i.e., its componentisation, which is lost during the normal compilation process, and enable runtime composition of TinyOS components on the sensor node. The proposed solution integrates seamlessly into the system architecture of TinyOS: it does not require any changes to the programming model of TinyOS and all existing components can be reused transparently. Our evaluation shows that DyTOS incurs a low performance overhead while keeping a smaller - up to one third - memory footprint than other comparable solutions.
Keywords: wireless sensor networks; WSNs; in situ reprogramming; software updates; modular development; incremental updates; remote reprogramming; transparent code integration; TinyOS; modular reprogramming; sensor nodes; operating system updating.
International Journal of Sensor Networks, 2015 Vol.19 No.3/4, pp.251 - 265
Received: 14 Jul 2013
Accepted: 26 Dec 2013
Published online: 05 Nov 2015 *