For security reasons, many companies usually allow only strictly regulated communication, specific system configurations and predetermined software components. Therefore, often only communication over the HTTP protoco...
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DTN nodes often idly wait for contacts and unnecessarily consume energy during these periods. For solar-powered nodes this means that solar panels and batteries could be much smaller with an efficient energy managemen...
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ISBN:
(纸本)9781450310796
DTN nodes often idly wait for contacts and unnecessarily consume energy during these periods. For solar-powered nodes this means that solar panels and batteries could be much smaller with an efficient energy management, reducing the physical size of these nodes. We present our design of a solar-powered DTN node including a module that handles solar charge management, energy management and a discovery mechanism to wake sleeping nodes. Moreover, the system senses the remaining battery capacity, and keeps a reserve for emergency communications. Our evaluation shows that the power management module's design is energy-efficient and performs as intended. Furthermore, we evaluate the discovery mechanism. The results show that the capabilities of the module offer a promising new approach to the implementation of energy efficient routing in DTNs. Copyright 2011 ACM.
Streaming of audiovisual media contents such as video or music using mobile devices and wireless networks leads to new challenges because these network connections are typically not very reliable. In this demo, we sho...
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ISBN:
(纸本)9781450308700
Streaming of audiovisual media contents such as video or music using mobile devices and wireless networks leads to new challenges because these network connections are typically not very reliable. In this demo, we show streaming of live video using a Delay Tolerant Network (DTN) approach. This allows the integration of multiple connections which leads to a higher availability and enables a video transmission without loss in the data stream.
In bus-based delay tolerant networks the duration of a contact between two nodes limits the amount of data that can be transferred. For the implementation of such networks it is important to determine which contact du...
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We propose a field experiment and a demonstration of a solar powered DTN node with a power management module. This module reduces the power consumption of the node by turning it off when the node is idle. It also hand...
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ISBN:
(纸本)9781450310796
We propose a field experiment and a demonstration of a solar powered DTN node with a power management module. This module reduces the power consumption of the node by turning it off when the node is idle. It also handles solar charge management, energy management and a discovery mechanism to wakeup sleeping nodes. Copyright 2011 ACM.
In this paper we present an approach to piggyback link quality measurements to IEEE 802.15.4 acknowledgement frames by generating acknowledgements in software instead of relying on hardware support. We show that the s...
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作者:
Gray, ChrisTU Braunschweig
Institute of Operating Systems and Computer Networks Braunschweig Germany
We assume we are given a set of points that have the property that their Voronoi diagram - restricted to some suitable bounding box - consists of only fat cells. We call such points well-spaced points. We give a linea...
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Wireless Sensor networks (WSN) now advance into areas where new scenarios and applications require WSNs to meet certain Quality of Service (QoS) requirements. To tackle these challenges, a routing approach has to cons...
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Mobile internet has rapidly evolved in the past years with an ever increasing number of novel technologies and services. Today's mobile devices often support multiple communication technologies for accessing Inter...
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GAL, the Lower Saxony Research Network Design of Environments for Ageing, investigates how information and communication technology can provide for better environments for ageing. This paper describes a service orient...
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