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This paper describes the authors' current work which aims at designing energy-efficient, self-organizing and robust communication architecture for Wireless Sensor Networks (WSNs). They have recently proposed the 1-hopMAC protocol, which builds a list of neighbor's on-demand. This removes the need to periodically exchange Hello messages. They present experimental results on energy-efficiency and collision probability which match previously published analytical and simulation-based results. They are currently working on using virtual coordinates as a basis for geographic routing. These coordinates are chosen randomly when a node boots and are constantly updated throughout the lifetime of the network.
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