Papers by Tommaso Melodia
Wireless Sensor and Actor Networks (WSANs) are distributed systems of heterogeneous devices, refe... more Wireless Sensor and Actor Networks (WSANs) are distributed systems of heterogeneous devices, referred to as sensors and actors, which sense, control, and interact with the physical environment. Sensors are low-cost, low-power, multi-functional devices that communicate untethered in short distances. Actors are resource-rich devices that collect and process sensor data and consequently perform actions on the environment.
Abstract—New-generation smart phones allow learning, visualizing, and sharing information about t... more Abstract—New-generation smart phones allow learning, visualizing, and sharing information about the daily activities of the users. Through these devices, users can exchange multimedia information such as digital video, audio and images. Wireless users in physical proximity that want to share these contents can initiate spontaneous social interactions by exchanging user profiles.
Abstract Since sensor networks can be composed of a very large number of nodes, the developed pro... more Abstract Since sensor networks can be composed of a very large number of nodes, the developed protocols for these networks must be scalable. Moreover, these protocols must be designed to prolong the battery lifetime of the nodes. Typical existing routing techniques for ad hoc networks are known not to scale well. On the other hand, the so-called geographical routing algorithms are known to be scalable but their energy efficiency has never been extensively and comparatively studied.
The availability of low-cost hardware such as CMOS cameras and microphones has fostered the devel... more The availability of low-cost hardware such as CMOS cameras and microphones has fostered the development of Wireless Multimedia Sensor Networks (WMSNs), ie, networks of wirelessly interconnected devices that are able to ubiquitously retrieve multimedia content such as video and audio streams, still images, and scalar sensor data from the environment.
Abstract The problem of throughput maximization in a cognitive radio network with decentralized c... more Abstract The problem of throughput maximization in a cognitive radio network with decentralized control (ie, a cognitive radio ad hoc network) is considered in this paper. First, decentralized and localized algorithms for throughput maximization through joint cognitive routing and interference-avoiding waveform selection are proposed, based on a nonlinear optimization framework.
Abstract The requirements of multimedia underwater monitoring applications with heterogeneous tra... more Abstract The requirements of multimedia underwater monitoring applications with heterogeneous traffic demands in terms of bandwidth and end-to-end reliability are considered in this article. To address these requirements, a new medium access control protocol named UMIMO-MAC is proposed.
Bluetooth is a promising technology for personal/local area wireless communications. A Bluetooth ... more Bluetooth is a promising technology for personal/local area wireless communications. A Bluetooth scatternet is composed of overlapping piconets, each with a low number of devices sharing the same radio channel. This paper discusses the scatternet formation issue by analyzing topological characteristics of the scatternet formed. A matrix-based representation of the network topology is used to define metrics that are applied to evaluate the key cost parameters and the scatternet performance.
Abstract UnderWater Acoustic Sensor Networks (UW-ASNs) are experiencing a rapid growth, due to th... more Abstract UnderWater Acoustic Sensor Networks (UW-ASNs) are experiencing a rapid growth, due to their high relevance to commercial and military applications such as oceanographic data collection, pollution monitoring, offshore exploration, disaster prevention, and tactical surveillance.
Abstract The problem of optimal resource allocation to share high-quality multimedia content in c... more Abstract The problem of optimal resource allocation to share high-quality multimedia content in cognitive ad hoc networks with cooperative relays is addressed in this paper. Cooperative transmission is a promising technique to increase the capacity of wireless links by exploiting spatial diversity without multiple antennas at each node. However, mainstream research in this field focuses on optimizing physical layer performance measures, with little consideration for application-specific and network-wide performance measures.
Abstract This paper investigates the potential of the compressed sensing (CS) paradigm for video ... more Abstract This paper investigates the potential of the compressed sensing (CS) paradigm for video streaming in Wireless Multimedia Sensor Networks. The objective is to study performance limits and outline key design principles that will be the basis for cross-layer protocol stacks for efficient transport of compressive video streams.
Abstract Underwater Acoustic Sensor Networks (UW-ASNs) consist of devices with sensing, processin... more Abstract Underwater Acoustic Sensor Networks (UW-ASNs) consist of devices with sensing, processing, and communication capabilities that are deployed underwater to perform collaborative monitoring tasks to support a broad range of applications. The enabling communication technology for distances over one hundred meters is wireless acoustic networking because of the high attenuation and scattering affecting radio and optical waves, respectively.
Abstract—In this paper, we present our ongoing work on developing a reconfigurable underwater net... more Abstract—In this paper, we present our ongoing work on developing a reconfigurable underwater networking testbed based on the Teledyne Benthos Telesonar SM-75 modem. The testbed is designed with the objective of allowing researchers and developers to advance research activities in the field of underwater networking and communications through a flexible testbed platform.
Abstract Wireless multimedia sensor networks (WMSNs) are networks of wirelessly interconnected de... more Abstract Wireless multimedia sensor networks (WMSNs) are networks of wirelessly interconnected devices that allow retrieving video and audio streams, still images, and scalar sensor data. WMSN require the sensor network paradigm to be rethought in view of the need for mechanisms to deliver multimedia content with a pre-defined level of quality of service (QoS).
Abstract—Underwater sensor networks will find appli-cations in oceanographic data collection, pol... more Abstract—Underwater sensor networks will find appli-cations in oceanographic data collection, pollution monitoring, offshore exploration, disaster prevention, assisted navigation, and tactical surveillance. Underwater acoustic networking is the enabling technology for these applications.
ABSTRACT In this paper, different deployment strategies for two-dimensional and three-dimensional... more ABSTRACT In this paper, different deployment strategies for two-dimensional and three-dimensional communication architectures for UnderWater Acoustic Sensor Networks (UW-ASNs) are proposed, and statistical deployment analysis for both architectures is provided.
Abstract—Ocean bottom sensor nodes can be used for oceano-graphic data collection, pollution moni... more Abstract—Ocean bottom sensor nodes can be used for oceano-graphic data collection, pollution monitoring, offshore exploration and tactical surveillance applications. Moreover, Unmanned or Autonomous Underwater Vehicles (UUVs, AUVs), equipped with sensors, will find application in exploration of natural undersea resources and gathering of scientific data in collaborative monitoring missions. Underwater acoustic networking is the enabling technology for these applications.
Abstract UnderWater Acoustic Sensor Networks (UW-ASNs) consist of sensors and Autonomous Underwat... more Abstract UnderWater Acoustic Sensor Networks (UW-ASNs) consist of sensors and Autonomous Underwater Vehicles (AUVs) performing collaborative monitoring tasks. In this article, UWMAC, a distributed Medium Access Control (MAC) protocol designed for UW-ASNs, is introduced. The proposed MAC protocol is a transmitter-based Code Division Multiple Access (CDMA) scheme that incorporates a novel closed-loop distributed algorithm to jointly set the optimal transmit power and code length.
Abstract This paper deals with scatternet formation in Bluetooth. A scatternet is an ad hoc netwo... more Abstract This paper deals with scatternet formation in Bluetooth. A scatternet is an ad hoc network of Bluetooth devices. Some works in the literature rely on the single-hop hypothesis, ie, all devices are in radio visibility of each other. Other works refer to the more likely circumstance that devices are scattered in an area where some of them can not directly communicate.
Abstract Underwater sensor networks will find applications in oceanographic data collection, poll... more Abstract Underwater sensor networks will find applications in oceanographic data collection, pollution monitoring, offshore exploration, disaster prevention, assisted navigation, and tactical surveillance applications. In this paper, the problem of data gathering in a 3D underwater acoustic sensor network is investigated at the network layer, by considering the interactions between the routing functions and the characteristics of the underwater channel.
Abstract The concept of a wireless underground sensor network (WUSN) is introduced and applicatio... more Abstract The concept of a wireless underground sensor network (WUSN) is introduced and applications are discussed. The feasibility of utilizing commonly available terrestrial wireless sensor network (WSN) hardware solutions in the underground environment is examined. Experiments are run to examine the packet error rate and the received signal strength of correctly received packets for a communication link between two underground sensors and between an underground sensor and an aboveground sensor.
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Papers by Tommaso Melodia