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Today’s cloud consumers gain a high level of flexibility by using externally provided cloud-based services. However, they have no means for requesting combined services from different clouds or for enforcing an individual quality level. Laying the foundation for market-based cloud collaborations including the negotiation of individual quality parameters is an important aspect for future cloud computing...
In today's global manufacturing markets, manufacturing processes need be flexibly adaptable and efficient due to changing business demands and tough cost pressure. To cope with this situation, concepts such as Virtual Factories can be beneficially applied to facilitate the collaboration between enterprises, especially small and medium‐sized ones, and therewith to achieve higher degrees of flexibility...
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 available access networks in a vehicular environment...
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 the arriving car's size. Therefore, means...
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 sensor nodes can locally detect the occurrence...
Energy constitutes a scarce resource in wireless sensor networks, making energy-efficient operation mandatory. Data transmission has been identified as one of the most energy consuming operations. Consequently, different approaches to reduce data transmissions have been proposed, like data filtering. Recently, the value of information of sensor data has been identified for data filtering, explicitly...
While cloud computing permits access to a large pool of experimental infrastructure, the most common form - virtual machines - has been shown to exhibit substantial deficits with respect to the accuracy of time measurements. In our ongoing work, we provide a detailed analysis of these deficits based on various machine configurations. Preliminary results indicate that not the use of virtualization...
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 are nowadays most often equipped with smartphones,...
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 part of energy consumption and monetary...
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 novel routing scheme that builds upon collection...
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 deployments in logistics require cost efficiency...
Wireless sensor networks provide a promising means to enable real-time monitoring of transport processes in logistics. In a corresponding logistics wireless sensor network, energy-efficient operation is mandatory. Cost efficiency and customer satisfaction are additional requirements to be explicitly considered, particularly in the application domain of logistics. As data transmission constitutes the...
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