Learn More
—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)
In this paper, we discuss the performance of multi-path routing techniques in underwater acoustic networks applied to an intruder detection scenario. We assume that a network of submarine sensors is deployed close to a surveilled harbor, with the task to detect outbound surface boats. The communications take place in the 4 to 8 kHz band, in order to favor(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)
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)
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)
In this paper, we process channel Signal-to-Noise-Ratio time series gathered in the proximity of the Pianosa island, Italy, in Summer 2009. These traces are used to model the performance of capacity-achieving code ensembles as employed in an Incremental Redundancy (IR) Hybrid Automatic Repeat reQuest (HARQ) error control scheme. We apply a code-matched(More)
— In this paper, we shed some light on the implications that using a recently proposed layered space–time multiuser detection technique has on MAC protocol design for ad hoc networks with multiple antennas. From this point of view, our work relates to both physical layer and network layer studies. In fact, on the one hand physical layer aspects are(More)