Sebastian Zöller

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—In tree-structured data collection sensor networks, packets are routed towards a sink node by iteratively choosing a node's immediate parent node as the next hop. It is however beyond the scope of these routing protocols to transfer messages along the reverse path, i.e., from the sink to individual nodes in the network. In this paper, we present CBFR, a(More)
—As wireless sensor nodes are mostly battery-powered, energy-efficient operation is a necessity to use their confined energy budget optimally. This is especially true in the logistics domain, where timely and accurate monitoring of containers is required, while the cost pressure is high. Thus, besides the need for energy efficiency, wireless sensor network(More)
—To effectively exploit the potential of smart environments , an energy-efficient data exchange between the smart environment infrastructure and its users is necessary. Usually, a major building block of smart environments are different sensors, which typically communicate making use of the IEEE 802.15.4 standard. Opposed to this, users in a smart(More)