Diego Dujovne

• PhD
• Professor (Associate) at Diego Portales University

Agriculture continues to be one of the world’s main sources of income and provides great environmental, territorial and social value. However, frost is a recurring problem for farmers each year, representing a significant threat to agricultural production. In a matter of hours, temperatures below the freezing point can result in the loss of nearly...

Headlines about fraudulent activities in the wine industry are increasingly common in today’s newspapers. A case in point involves wineries in Castilla-La Mancha, Spain, which sell their wine to wineries in other regions or countries. These wineries then bottle the wine under their own label and assign it an incorrect designation of origin, leading...

The integration of the 60 GHz band into the IEEE 802.11 standard has revolutionized indoor wireless services. However, this band presents unique challenges to indoor wireless communication infrastructure, originally designed to handle data traffic in residential and office environments. Estimating 60 GHz signal propagation in indoor settings is par...

This study aims to provide valuable insights into consumer preferences for delivery services in online shopping in Chile. The COVID-19 pandemic has accelerated the evolution of delivery and logistics services, leading to increased competition among online stores. Chile, with its highly digitally enabled population and a competitive landscape of onl...

Industrial multi-hop Internet of Things (IIoT) have strict reliability requirements and they are expected to have deterministic behavior. Reliability is associated with the network’s ability to provide the best goodput possible to the destination from the source application, while deterministic behavior implies that the packets must also arrive at...

Industrial multi-hop Internet of Things (IIoT) have strict reliability requirements and they are expected to have deterministic behavior. Reliability is associated with the network's ability to provide the best goodput possible to the destination from the source application, while deterministic behavior implies that the packets must also arrive at...

One of the essential requirements of wireless industrial Internet of Things (IoT) systems is to have an extremely high packet delivery rate, generally over 99.9% and comply with realtime deadline constraints. In industrial IoT networks, packets arriving after the deadline become part of packet loss and lose meaning when they arrive late. However, c...

Presents information and current topics of interest to the global communications industry.

Presents information and current topics of interest to the global communications industry.

This letter proposes a multi-gateway designation framework to design real-time wireless sensor networks (WSNs) improving traffic schedulability, i.e., meeting the traffic time constraints. To this end, we resort to Spectral Clustering un-supervised learning that allows defining arbitrary k disjoint clusters without knowledge of the nodes physical p...

One of the essential requirements of wireless industrial Internet of Things (IoT) systems is to have an extremely high packet delivery rate, generally over 99.9% and comply wih realtime deadline constraints. In industrial IoT networks, packets arriving after the deadline become part of packet loss and lose meaning when they arrive late. However, cu...

A key ingredient for semi-analytic models (SAMs) of galaxy formation is the mass assembly history of haloes, encoded in a tree structure. The most commonly used method to construct halo merger histories is based on the outcomes of high-resolution, computationally intensive N-body simulations. We show that machine learning (ML) techniques, in partic...

This research proposes a co-design framework for scheduling, routing and gateway designation to improve the real-time performance of low-power wireless mesh networks. We target time-synchronized channel hopping (TSCH) networks with centralized network management and a single gateway. The end goal is to exploit existing trade-offs between the three...

A key ingredient for semi-analytic models (SAMs) of galaxy formation is the mass assembly history of haloes, encoded in a tree structure. The most commonly used method to construct halo merger histories is based on the outcomes of high-resolution, computationally intensive N-body simulations. We show that machine learning (ML) techniques, in partic...

Presents information and current topics of interest to the global communications industry.

Low Power Wide Area Networks (LPWAN) are expected to enable the massive connectivity of small and constrained devices to the Internet of Things. Due to the restricted nature of both end devices and network links, LPWAN technologies employ network stacks where there is no interoperable network layer as a general case; instead, application data are u...

Global warming effects are seen around the world and Latin American countries are not an exception, especially for expanding drought areas. Therefore, underground water resources use in the region is incrementing exponentially. However, temporal and spatial underground water information concerning availability and quality is scarce, disabling prope...

Presents information and current topics of interest to the global communications industry.

Presents information and current topics of interest to the global communications industry.

This paper proposes network centrality as a criterion to designate a gateway or sink in real-time wireless sensor-actuator networks (WSAN). The objective is to improve network schedulability by design, particularly, by means of a centrality-driven gateway designation. To this purpose, four classical centrality metrics taken from social network anal...

This research explores the notion of network centrality as a criterion to designate a node as sink or gateway in real-time wireless sensor networks (WSN). Since centrality is a quantitative measure of how important a node is with respect to others in a given network, we propose to designate as gateway the node with the highest centrality measure. T...

This research explores the notion of network centrality as a criterion to designate a node as sink or gateway in real-time wireless sensor networks (WSN). Since centrality is a quantitative measure of how important a node is with respect to others in a given network, we propose to designate as gateway the node with the highest centrality measure. T...

Presents information and current topics of interest to the global communications industry.

Los productores de viñedos han estado reuniendo información operacional significativa sobre sus campos, y las fincas más avanzadas pueden producir varios años de datos sobre cómo se ha plantado, regado, fertilizado y cómo han madurado las uvas. A pesar de esta riqueza de datos operacionales, hoy en día no existe ninguna herramienta que pueda comple...

RESUMEN Este trabajo tiene como objetivo proponer, desarrollar y evaluar alternativas de solución Multicast, para redes de IoT, basadas en algoritmos y procesos que permitan una mejora en el uso de los recursos y su escalabilidad. La aplicación concreta de estas técnicas se puede aplicar en nodos sensores que deban enviar información a múltiples no...

6TiSCH is a standardization group within the Internet Engineering Task Force (IETF) that works on IPv6‐enabled Time‐slotted Channel Hopping (TSCH) networks. The 6TiSCH protocol stack, designed by the standardizationwork at the IETF, has direct applicability to low‐power Internet of Things (IoT) use cases, including smart factory, building, infrastr...

We investigated Internet eXchange Points (IXPs) deployed across Latin America. We discovered that many Latin American states have been actively involved in the development of their IXPs. We further found a correlation between the success of a national IXP and the absence of local monopolistic ASes that concentrate the country's IPv4 address space....

Semi-analytic models are best suited to compare galaxy formation and evolution theories with observations. These models rely heavily on halo merger trees, and their realistic features (i.e., no drastic changes on halo mass or jumps on physical locations). Our aim is to provide a new framework for halo merger tree generation that takes advantage of...

Semi-analytic models are best suited to compare galaxy formation and evolution theories with observations. These models rely heavily on halo merger trees, and their realistic features (i.e., no drastic changes on halo mass or jumps on physical locations). Our aim is to provide a new framework for halo merger tree generation that takes advantage of...

IoT in Agriculture applications have evolved to solve several relevant problems from producers. Here, we describe a component of an IoT-enabled frost prediction system. We follow current approaches for prediction that use machine learning algorithms trained by past readings of temperature and humidity sensors to predict future temperatures. However...

We deploy two low-power wireless networks, one in a Smart Agriculture setting (a peach orchard), one in a Smart Building. Both networks use out-of-the-box SmartMesh IP technology to gather sensor values, as well as extensive network statistics. This article presents an in-depth analysis of the performance of both networks, and compares them. Nodes...

Efficient spectrum usage and optimized energy consumption directly depend on the radio duty cycle of the communicating devices. Tight synchronization of communicating nodes enables optimal orchestration of the access to the medium as nodes turn their radios on precisely when needed. Achieving synchronization, however, requires a reference time sour...

A 21-node low-power wireless mesh network is deployed in a peach orchard. The network serves as a frost event prediction system. On top of sensor values, devices also report network statistics. In 3 months of operations, the network has produced over 4 million temperature values, and over 350,000 network statistics. This paper presents an in-depth...

Deterministic communication is currently a fundamental requirement for many real-time systems, such as drive-bywire and autonomous driving solutions; however, in the last few years there has been a sustained increase in the number of other type of on-board connected devices such as actuators, rear vision cameras and multimedia services using differ...

In 2013, 85% of the peach production in the Mendoza region (Argentina) was lost because of frost. In a couple of hours, farmers can lose everything. Handling a frost event is possible, but it is hard to predict when it is going to happen. The goal of the PEACH project is to predict frost events by analyzing measurements from sensors deployed around...

In 2013, 85% of the peach production in the Mendoza region (Argentina) was lost because of frost. In a couple of hours, farmers can lose everything. Handling a frost event is possible, but it is hard to predict when it is going to happen. The goal of the PEACH project is to predict frost events by analyzing measurements from sensors deployed around...

In smart factory applications, sensors, actuators, field devices, and supervision systems often require a high degree of reliability and timeliness in information exchange. The quality of service provided by the underlying industrial communication network is a key requisite for quality of control. In this context, the WirelessHART, ISA100.11a, and...

The rise of the Industrial Internet of Things as a new paradigm for instrumentation and control has brought the use of internet-enabled constrained devices to complement and replace standard wired networks with wireless connectivity reducing deployment and maintenance costs. This work has been supported by the development of several industry standa...

Network packet tracing has been used for many different purposes during the last few decades, such as network software debugging, networking performance analysis, forensic investigation, and so on. Meanwhile, the size of packet traces becomes larger, as the speed of network rapidly increases. Thus, to handle huge amounts of traces, we need not only...

Industrial and IP-enabled low-power wireless networking technologies are converging, resulting in the Industrial Internet of Things. On the one hand, low-power wireless solutions are available today that answer the strict reliability and power consumption requirements of industrial applications. These solutions are based on Time- Synchronized Chann...

In the last few years, software defined radio has become a widespread tool for research and development in the wireless arena. One of the drivers of this success is GnuRadio, an open source collection of signal processing routines, together with the inception of commercially available software radio front-ends to complete the signal chain. A number...

Everyday, Smart Cities are closer to becoming ubiquitous around the world; current deployments include not only city wide parking systems but also energy-aware lightning and smart grid applications. This exponentially growing field is backed with several standards for communication and interaction, from the physical to the application level, such a...

Radio Tomographic Imaging (RTI) is a new method for tracking and localizing moving objects within an area surrounded by wireless nodes. Signal blockage caused by one or multiple objects (i.e. a person) will attenuate the Received Signal Strength (RSS). In this paper, we experimentally present the limits where RTI may not operate properly, taking in...

During the last decade, WSN routing algorithms diversity has evolved and clustered onto several categories. Although most of them still rely on the use of individual node addresses as an input for the routing algorithm, there is a renewed interest in the use of addressless routing, specially from the proposed IETF (RFC6550) standard of the RPL algo...

Even though the most recent proposal to change the architecture of internet from network-based to data-based, called Named Data Networking (NDN) is rapidly evolving, mobility support is still an open issue. Mobile IP-enabled devices are currently in the billions and increasing; as a consequence, mobility represents a challenge to overcome for the s...

One of the most important aspects before installing a Wireless Sensor Network (WSN) is a previous study of connectivity constraints that exist in the area to be covered. This study is critical to the final distribution of the sensors, with an important impact in the life of the network by reducing consumption, and on the robustness by contemplating...

Traditionally, wireless protocol proposals have been often tested and validated using only analytical and simulation models. How-ever, as the wireless environment is very complex to model accurately, and since the cost of wireless cards has decreased in an exponential way, today more and more research papers include evaluation of new pro-posals usi...

The analysis and evaluation of new wireless network protocols is a long process that requires mathematical analysis, simulations, and increasingly experimentations under real conditions. Measurements are essential to analyze the performance of wireless protocols such as IEEE 802.11 networks in real environments, but experimentations are complex to...

Since the inception of the 802.11 standard in 1999, WLANs, which used to be exceptional, became a massive phenomena together with the evolution of portable devices. At the same pace, research on wireless networks, where both simulation and experimentation are used to validate protocols, has evolved rapidly. Nevertheless, the models used in this are...

Realistic simulation of 802.11 traffic subject to high interference, for example in dense urban areas, is still an open issue. Many studies do not address the interference problem properly. In this paper, we present our preliminary work on a method to recreate interference traffic from real measurements. The method consists in capturing real traffi...

Analysis of wireless experimentation results is a complex task to achieve. As multiple probes are needed in order to get a global view of a wireless experimentation, the resulting packet traces may be very large. In this paper we propose an algorithm that performs trace synchronization and merging in a scalable way. The algorithm output is stored i...

This report presents our on-going work on a new system designed to provide a continuous network connectivity to communicating devices located on-board a vehicle moving at ”high speed” with a predictable trajectory such as trains, subways or buses. The devices on-board the vehicle form a sub-network called the ”in-motion network”. This system we pro...

Depuis la création de la norme 802.11, en 1999, les réseaux locaux sans fil, qui était exceptionnelle à l'époque, sont devenus un phénomène incontournable après la l'évolution des appareils mobiles. Au même rythme, la recherche sur les réseaux sans-fil a rapidement évolué suivant des modèles adaptés du paradigme des réseaux filaires, qui a conduit...

The adoption of new protocols and network mechanisms requires an experimentation phase which is complex to deploy, and even more on wireless networks. Generally, ad-hoc tools are developed for the specific needs on a experimental scenario to capture, analize and store statistical data. Because there is no common experimental methodology within the...

While the deployment of WiFi networks continues to grow at an explosive rate, the multicast multimedia delivery service on WiFi compliant devices is still in its early stage of development. The real culprit is the IEEE 802.11 MAC protocol, and in particular, the absence of feedback mechanism when multicast is used. Recently, a leader-based mechanis...