Tales Heimfarth

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For the evaluation of wireless network protocols, simulation has established itself as a good compromise between cost and complexity, on the one hand, and accuracy of results, on the other hand. Most established network simulators, however, were originally developed for wired networks and only later extended to the wireless domain. Some simulators like(More)
For the evaluation of wireless network protocols, simulation has established itself as a good compromise between cost and complexity, on the one hand, and accuracy of results, on the other hand. In order to assess and debug the simulated protocols, visualization both in the form of textual console messages and graphical representations can be of great help.(More)
This paper describes RTC, a set of software layers based on the ISO/OSI standard that implements a complete real-time communication platform on a cluster running under realtime Linux. A modi ed TDMA protocol is implemented as Media Access Control (MAC) discipline, and at the application level the communication approach is channel-oriented. The RTC platform(More)
An important problem in Wireless Sensor Networks (WSN) is the occurrence of failures that lead to the disconnection of parts of the network, compromising the final results achieved by the WSN operation. A way to overcome such problem is to provide a reliable connection to support the connectivity via other types of nodes that communicate with the sensor(More)
Advances in the area of wireless sensor networks enable a myriad of new applications. Communication is however still the most costly function in these networks. Regions with higher node density lead to a greater amount of energy waste through overhearing, collisions, etc., while not increasing the network's capacity. Therefore, we propose an emergent(More)
It can be observed that most technological artefacts are becoming intelligent "things that think" and most of these intelligent objects will be linked together to an "Internet of things". To master this omnipresent virtual "organism", completely new design and operation paradigms have to evolve. In this paper we discuss how research of our group at the(More)
This paper presents a bio-inspired networking strategy to support the cooperation between static sensors on the ground and mobile sensors in the air to perform surveillance missions in large areas. The goal of the proposal is to provide low overhead in the communication among sensor nodes, while allocating the mobile sensors to perform sensing activities(More)