Sebastian Zöller

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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)
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)
Internet access to multimedia content in vehicles today is only possible via cellular networks which offer insufficient bandwidth. By using additional V2X technology in a hybrid manner, vehicles can benefit from additional bandwidth to receive enhanced internet connectivity. We introduce a holistic concept that pursues the vision of an optimal use of(More)
The global trend of increased urbanization makes space rare in city environments in general and for parking in particular. In addition, cars become bigger and often use more than one parking space. As a result neighboring parking spaces can be affected by a parked car. So, a basically free parking space might be too narrow for an arriving car depending on(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 environment(More)
Energy-efficient operation is mandatory in wireless sensor networks due to the limited energy budget of sensor nodes. Considering the potential application of wireless sensor networks in logistics, cost efficiency is another major requirement due to high cost pressure. To save on data transmissions within such sensor deployments, which account for the major(More)
—The application of wireless sensor network technology is very promising to meet the demand for real-time monitoring of multimodal transport processes. In such an application context, requirements like energy efficiency, cost efficiency, and satisfying users' information needs have to be met. Within the demonstration proposed with this paper, we outline the(More)
Energy is limited in wireless sensor networks due to mostly battery-operated wireless sensor nodes. Consequently, an efficient energy usage significantly enhances the lifetime of a wireless sensor network. In this paper, we propose a cross-layer optimization concept that exploits business knowledge in the logistics domain to adapt communication by business(More)
The logistics domain constitutes a promising application area for wireless sensor network technology. Wireless sensor nodes can be deployed for example in containers or trucks' load areas to monitor environmental parameters relevant to the condition of transported goods in real time. Exploiting their computation and communication capabilities, wireless(More)