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A remote code update mechanism for wireless sensor networks (2003)
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BibTeX
@TECHREPORT{Stathopoulos03aremote,
author = {Thanos Stathopoulos and Tyler Mchenry and John Heidemann and Deborah Estrin},
title = {A remote code update mechanism for wireless sensor networks},
institution = {},
year = {2003}
}
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Abstract
Wireless sensor networks consist of collections of small, low-power nodes that interface or interact with the physical environment. The ability to add new functionality or perform software maintenance without having to physically reach each individual node is already an essential service, even at the limited scale at which current sensor networks are deployed. TinyOS supports single-hop over-the-air reprogramming today, but the need to reprogram sensors in a multihop network will become particularly critical as sensor networks mature and move toward larger deployment sizes. In this paper we present Multihop Over-the-Air Programming (MOAP), a code distribution mechanism specifically targeted for Mica-2 Motes. We discuss and analyze the design goals, constraints, choices and optimizations focusing in particular on dissemination strategies and retransmission policies. We have implemented MOAP on Mica-2 motes and we evaluate that implementation using both emulation and testbed experiments. We show that our dissemination mechanism obtains a 60–90 % performance improvement in terms of required transmissions compared to flooding. We also show that a very simple windowed retransmission tracking scheme is nearly as effective as arbitrary repairs and yet is much better suited to energy and memory constrained embedded systems. 1
Keyphrases
wireless sensor network remote code update mechanism mica-2 mote individual node retransmission policy dissemination mechanism embedded system code distribution mechanism limited scale software maintenance current sensor network arbitrary repair single-hop over-the-air reprogramming today sensor network dissemination strategy low-power node new functionality testbed experiment design goal physical environment essential service performance improvement deployment size multihop network present multihop over-the-air programming
