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In this paper, we describe a practical realization of an Internet-of-Things (IoT) architecture at the University of Padova, Italy. Our network spans the floors of different buildings within the Department of Information Engineering, and is designed to provide access to basic services such as environmental monitoring and localization to University users, as(More)
—Interest in underwater acoustic networks has grown rapidly with the desire to monitor the large portion of the world covered by oceans. Fundamental differences between underwater acoustic propagation and terrestrial radio propagation may call for new criteria for the design of networking protocols. In this paper, we focus on some of these fundamental(More)
Network simulators are a fundamental tool for the performance evaluation of protocols and applications in complex scenarios, which would be too expensive or infeasible to realize in practice. With the aim to provide a shared environment for the simulation of underwater networks we have adapted the ns2 network simulator to provide a detailed reproduction of(More)
— Geographic forwarding in wireless sensor networks (WSN) has long suffered from the problem of bypassing " dead ends, " i.e., those areas in the network where no node can be found in the direction of the data collection point (the sink). Solutions have been proposed to this problem, that rely on geometric techniques leading to the planarization of the(More)
This paper explores hybrid ARQ policies based on fountain codes for the transmission of multicast messages in underwater channels. These rateless codes are considered because of two nice properties, namely, they are computationally lightweight and do not require to know the channel erasure probabilities at the receivers prior to transmission. In this paper,(More)
Underwater acoustic networks have the potential to support a large variety of applications, such as environmental and equipment monitoring. However, underwater protocol design is in its infancy. Although there has been some work in routing and MAC layer protocols, they only address some of the challenges. A fundamental primitive that has not yet been(More)
We present an open source framework that makes it possible to remotely monitor and control a heterogeneous network of underwater acoustic nodes. The framework exploits acoustic communications to deliver control messages, and thus avoids the need to deploy cabled or wireless connections to control each node. The framework has been developed with the goal to(More)
In this paper we present TinyNET, a modular framework allowing development and quick integration of protocols and applications for Wireless Sensor Networks (WSNs) in TinyOS. The motivation behind TinyNET is twofold: on one hand it allows to adopt a divide-and-conquer approach in the development of any TinyOS application; on the other hand it provides a(More)
Our aim in this paper is to study the performance of broadcasting algorithms for underwater acoustic sensor networks (UWASNs). The targeted scenario is very simple; we consider a source (the initiator of the broadcast transmission) and a number of nodes randomly placed within a given geographical area. For an efficient broadcast transmission we advocate the(More)