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Experimental optimization of wireless protocols and validation of novel solutions is often problematic, due to limited configuration space present in commercial wireless interfaces as well as complexity of monolithic driver implementation on SDR-based experimentation platforms. To overcome these limitations a novel software architecture is proposed, called WiSHFUL, devised to allow: i) maximal exploitation...
A large amount of research focuses on experimentally optimizing performance of wireless solutions. Finding the optimal performance settings typically requires investigating all possible combinations of design parameters, while the number of required experiments increases exponentially for each considered design parameter. The aim of this paper is to analyze the applicability of global optimization...
Wireless sensor networks consist of several hundredths of simple sensing devices, equipped with a radio. They are typically used for monitoring and automation purposes of large areas. Due to their simplicity, these networks quickly run out of energy, and often have problems regarding scalability and available bandwidth. To solve these issues, current research is mostly limited to the addition of extra...
In wireless sensor and actuator networks nodes can fail and the link quality can fluctuate rapidly over time. With the start of the pervasive revolution, issues like scalability and mobility must be tackled in these low-power and lossy networks. We propose and evaluate two mechanisms, path resumption and cost based multipath routing, which can help existing or new local path recovery techniques to...
Most sensor networks do not support QoS or heterogeneity. As a result, current sensor networks are not suited for next-generation applications, such as wireless building automation, process control or medical applications. In this paper, we present an alternative architecture wherein the system is responsible for packet creation and packet manipulation. To support QoS, energy-efficiency and heterogeneity,...
Energy is scarce in sensor nodes. Therefore wireless sensor networks aim to transmit as few packets as possible. An often used technique is to aggregate data coming from multiple sensor nodes into a single packet. In this paper, we broaden this approach so that control information can also be sent together with other (control) information. The benefits of this broadened aggregation approach are discussed,...
In contrast to traditional wireless sensor networks, where energy conservation is the main objective, next-generation wireless sensor networks will additionally demand guarantees in terms of delay, reliability and bandwidth. However, current sensor network protocols offer very limited QoS support. Moreover, the current research does not take into account the growing heterogeneous nature of sensor...
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