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The main goal of this work is to characterise communications through body area networks (BANs), analysing how the human body affects wireless links qualities. 802.15.4 MICAz motes were deployed on seven on-body locations of four volunteers and a test-dummy. The quality of the communications was monitored in order to study the channel behaviour. Results show(More)
Opportunistic wireless sensor networks (WSNs) have recently been proposed as solutions for many remote monitoring problems. Many such problems, including environmental monitoring, involve large deployment scenarios with lower-than-average node density, as well as a long time scale and limited budgets. Traditional approaches designed for conventional(More)
A flexible wireless sensor network platform for easier implementation of diverse applications has been developed and deployed at the Institute Superior Tecnico - Technical University of Lisbon (IST-TUL). This test-bed integrates multiple projects into a single common network, thus creating an expandable platform that facilitates the development of future(More)
— A flexible Wireless Sensor Network platform for easier implementation of diverse applications has been developed and deployed at one of the Instituto Superior Técnico-Technical University of Lisbon (IST-TUL) campus. Since its initial deployment in 2007, this test-bed has grown steadily, supporting new nodes, applications and experiments. However, some(More)
A new modular transport layer protocol for wireless sensor networks (WSNs) is proposed: WMTP - Wireless Modular Transport Protocol. This protocol not only allows the simultaneous use of all the main features commonly found in WSN transport protocols, namely congestion-control, fairness, and reliability, but also does so in a modular fashion. This way, the(More)
This paper proposes an environmental monitoring application based on the concept of Wireless Sensor Networks (WSNs). The goal of this application is to enable, through the measurement of relevant parameters, the constant evaluation of the state of the grass in the different zones of a golf course. The environmental monitoring systems currently installed on(More)
i This dissertation is dedicated to my Father, Luís Filipe Pedrosa, for his constant support throughout my life. ii Acknowledgments First and foremost, I would like to thank my supervisor, Professor Rui Rocha, for introducing me to the world of wireless sensor networks. Working with him has been a great honor and it is needless to say that, without his(More)
A flexible Wireless Sensor Network platform for implementation of diverse applications has been developed and deployed at Instituto Superior Técnico-Technical University of Lisbon (IST-TUL). Since its initial deployment in 2007, this testbed has grown steadily, supporting new nodes, applications and experiments. However, some initial problems, which were(More)