Francesco Potortì

Francesco Potortì
Italian National Research Council | CNR · Institute of Information Science and Technology "Alessandro Faedo" ISTI

About

124
Publications
14,078
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,643
Citations
Citations since 2017
15 Research Items
608 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
Introduction
Francesco Potortì currently works at the Institute of Information Science and Technology "Alessandro Faedo" ISTI, Italian National Research Council. He does research in Computer Communications (Networks) and Telecommunications Engineering. His current research interests are focused on indoor localisations ystems.

Publications

Publications (124)
Article
Indoor localization is a growing research field and interest is expanding in many application fields, including services, measurement, mapping, security, and standardization. The quest for appropriate tracking technologies for COVID-19 pandemic control has shown us the importance of identifying the sensors data and processing that are suitable, acc...
Article
Every year, for ten years now, the IPIN competition has aimed at evaluating real-world indoor localisation systems by testing them in a realistic environment, with realistic movement, using the EvAAL framework. The competition provided a unique overview of the state-of-the-art of systems, technologies, and methods for indoor positioning and navigat...
Article
Full-text available
Every year, for ten years now, the IPIN competition has aimed at evaluating real-world indoor localisation systems by testing them in a realistic environment, with realistic movement, using the EvAAL framework. The competition provided a unique overview of the state-of-the-art of systems, technologies, and methods for indoor positioning and navigat...
Article
Full-text available
IPIN 2019 Competition, sixth in a series of IPIN competitions, was held at the CNR Research Area of Pisa (IT), integrated into the program of the IPIN 2019 Conference. It included two on-site real-time Tracks and three off-site Tracks. The four Tracks presented in this paper were set in the same environment, made of two buildings close together for...
Article
Full-text available
The last 10 years have seen enormous technical progress in the field of indoor positioning and indoor navigation; yet, in contrast with outdoor well-established GNSS solutions, no technology exists that is cheap and accurate enough for the general market. The potential applications of indoor localization are all-encompassing, from home to wide publ...
Article
Indoor Positioning Systems suffer from a lack of standard evaluation procedures enabling credible comparisons: this is one of the main challenges hindering their widespread market adoption. Traditionally, accuracy evaluation is based on positioning errors defined as the Euclidean distance between the true positions and the estimated positions. Whil...
Conference Paper
Full-text available
Radio-Frequency based device-free localisation systems are able to pinpoint people's location in a given area without their cooperation. They work by analysing the perturbations that the presence of a person causes on the communications exchanged by a high number of radio devices installed around the area. Typical numbers are some tens of devices f...
Chapter
No standard methods for evaluating indoor localization systems are generally accepted and used by researchers and industry. The lack of common test beds is a problem when evaluating the relative performance of different systems. As a step towards tackling this problem, the EvAAL Indoor Localization competition was launched in 2011, followed by the...
Conference Paper
Indoor localisation systems have been studied in the literature for more than ten years and are starting to approach the market. The absence of standard evaluation methods is one of the obstacles to their adoption outside of customised environments. Specifically, the definition of benchmarking method-ologies, common evaluation criteria, standardise...
Article
Most of us carry mobile devices that routinely disseminate radio messages, as is the case with Wi-Fi scanning and Bluetooth beaconing. We investigate whether it is possible to examine these digital crumbs and have them reveal useful insight on the presence of people in indoor locations, as the literature lacks any answers on this topic. Wi-Fi probe...
Article
Full-text available
Device-free indoor localisation based on received signal strength (RSS) is unobtrusive and cheap. In a world where most environments are rich in ubiquitous small radio transmitters, it has the potential of being used in a 'parasitic' way, by exploiting the transmissions for localisation purposes without any need for additional hardware installation...
Conference Paper
Full-text available
Comparing and testing indoor positioning system is a hot topic in the indoor localisation community. In fact, after several years algorithms and methods have been developed and matured, yet no general framework exists to reliably compare them. The scarcity of common datasets for off-line test of emerging indoor positioning systems and the lack of a...
Article
Full-text available
In recent years, indoor localization systems have been the object of significant research activity and of growing interest for their great expected social impact and their impressive business potential.~Application areas include tracking and navigation, activity monitoring, personalized advertising, Active and Assisted Living (AAL), traceability, I...
Conference Paper
While indoor localization techniques based on Wi-Fi RSS measurements have been extensively studied, their application to eavesdropping Wi-Fi probe requests sent from mobile devices in large indoor environments, such as shopping malls, is scarce or absent in the literature. The idea behind this work is to observe Wi-Fi enabled smartphones, especiall...
Article
Ambient Assisted Living applications are deployed in smart environments that provide some basic services, a typical example being user localization. AAL applications generally have low accuracy requirements for indoor localization; this opens the opportunity for parasitizing the existing smart environment infrastructure without adding dedicated pos...
Conference Paper
Full-text available
Device-free localization algorithms attract, among others, the attention of researchers working in the Ambient Assisted Living (AAL) scenarios, where the target user might not be able or willing to wear any devices. We concentrate on systems that exploit the Received Signal Strength indicator coming from wireless devices whose position is known, ca...
Technical Report
Full-text available
This document reports on the final version of the sensor network and the GiraffPlus integrated system. The final version delivered at month 36 incorporates the input from the last evaluation phase leading to a refined system. The final version of the middleware infrastructure integrates a more complete set of sensors and functionalities. Indeed, th...
Article
This chapter highlights the importance of localization in relation to on-body area networks and gives a broad overview of localization methods and technologies. Most of the material is relative to indoor localization, because that is where body-area networks are mostly relevant. The chapter provides an overview on criteria used to evaluate the perf...
Conference Paper
Full-text available
Non-intrusive load monitoring of domestic appliances has received steady interest in the last twenty years, first because of interest from energy companies interested in usage statistics for power balancing and, more recently, in order to assist users in tuning their habits for reduced power consumption. We discuss how this concept can be used in r...
Technical Report
Full-text available
This document reports on the third prototype of the system that is currently deployed in all test sites. The third prototype at month 30 provides the final version of the network system and the second and final version of the Giraff platform. A middleware solution helps to integrate the software components developed by the WP3 and WP4 and enhanced...
Article
Evaluation of ambient assisted living (AAL) systems is particularly challenging due to the complexity of such systems and the variety of solutions adopted and services offered. Yet analyzing and comparing AAL solutions is paramount for assessing research results in this area. Evaluating AAL Systems through Competitive Benchmarking (EvAAL) is a rece...
Conference Paper
We present a device-free localization method oriented to Ambient Assisted Living applications. The system exploits the received signal strength (RSS) measured by fixed wireless communications devices, whose position is known a priori, in order to localize a person in the transmission coverage area. The proposed localization system is passive, by no...
Article
One problem which slows down the creation of the AAL market is fragmentation of research efforts and the lack of a standardised approach for developers. To address this, we founded the AALOA (AAL Open Association). The vision of AALOA is to create a ecosystem for the domain of assistive technology for independent living. Community building activiti...
Article
Healthy and active ageing is one of the main challenges for most industrialised nations and a key issue on Europe's agenda for the period 2014-2020. The number of people aged 60 and over in the EU is now rising by more than two million every year. This raises the question of how to transform this challenge to our societies into a driver of economy...
Chapter
EvAAL (Evaluating AAL Systems Through Competitive Benchmarking) is an international competition aimed at the evaluation and assessment of Ambient Assisted Living systems components, services and platforms. In 2011 took place the first edition of EvAAL on the special theme of Indoor Localization and Tracking for AAL. This paper describes the technic...
Conference Paper
Full-text available
RSS-based indoor localization systems are widely accepted in the literature as one of the less invasive localization technique. In fact, this range-based approach does not require any special hardware and is available in most standard wireless devices. Furthermore, judicious use of RSS has not a significant impact on local power consumption, sensor...
Article
Full-text available
A feasibility study, where small wireless transceivers are used to classify some typical limb movements used in physical therapy processes is presented. Wearable wireless low-cost commercial transceivers operating at 2.4 GHz are supposed to be widely deployed in indoor settings and on people's bodies in tomorrow's pervasive computing environments....
Conference Paper
Evaluating Ambient Assisted Living (AAL) systems is challenging due to the complexity and variety of solutions adopted and services offered. EvAAL is an international competition aimed to address this problem by evaluating and assessing the AAL systems components, services and platforms. In 2011 took place the first edition of EvAAL on the special...
Conference Paper
AAL - Ambient Assisted Living. When the topic “AAL” comes up, everybody thinks first of fascinating technology that is unobtrusively integrated in “smart home environments” and supports people in their daily lives. This thinking is surely be driven by the ongoing development of impressive services that was and is still provided by the AAL research...
Conference Paper
Full-text available
We examine the indoor single-room localisation problem while using multiple fixed transmitters (anchors) and multiple mobile receivers placed on the user (mobiles). Anchors transmit a periodic beacon that the mobiles receive and of which they measure the received power level value (RSSI). Using this information only, which requires no specialised h...
Article
Nowadays, advances in telecommunication network design and performance analysis often rely on dedicated software tools. Unfortunately, developing new tools is a very time and resources consuming activity. To rationalise development costs, existing applications can be extended. Alternatively, existing software components can be combined and integrat...
Conference Paper
Full-text available
In this paper an arm rehabilitation scenario was set-up to estimate and evaluate the principal activities of this limb by the suggested WBAN-based approach. A couple of wearable sensors mounted on the arm and a fixed node constitute the wireless network. In order to identify and classify the rehabilitation activities an algorithm based on the Recei...
Article
Full-text available
Broadcasting is an efficient and scalable way of transmittingdata over wireless channels to an unlimited number of clients. In this paper the problem of allocating data to multiple channels is studied, assuming flat data scheduling per channel and the presence of unrecoverable channel transmission errors. The objective is that of mini- mizing the a...
Conference Paper
Full-text available
This paper aims at providing different cost-efficient solutions for the channel impairments in tropical areas. In order to extend service to isolated areas, we propose an hybrid architecture based on DVB-S2/RCS + Wi-Fi networks. In this scenario, the delay of the ACM reaction to fade changes can affect the quality of the video transmission, especia...
Conference Paper
Full-text available
In case of video streaming services via satellite towards vehicular clients, very long blockage periods due to road infrastructures, vegetation, and so on, may lead to a complete channel outage, which may result in the loss of all packets transmitted during that period, even in the presence of interleaving and FEC techniques. But if these periods a...
Conference Paper
Full-text available
In this paper, path loss measurements performed with low cost MicaZ modules used for on-body wireless sensor networks have been shown. By combining the experimental activities with simulation results based on simple canonical geometries, it has been possible to extract some simple path loss models. Time domain properties of the field attenuation ar...
Conference Paper
Full-text available
An ML approach is able to exploit all available information, and has proven to be a powerful method to evaluate RSSI localisation methods. We plan to use it to attack problems like optimal anchor placement, exploiting multiple mobile receivers, and localisation coupled to tracking. One preliminary result is that, when accounting for positioning and...
Conference Paper
Full-text available
On-body wireless sensor networks (WSNs) are gaining an increasing interest in medical, military as well as entertainment applications. Wireless transceiver modules placed on the body and combined with actuators/sensors can communicate between them and with any other node located in the surrounding environment, without any human body movement constr...
Conference Paper
Full-text available
This paper aims at providing different cost-efficient solutions for the channel impairments in tropical areas. In order to extend service to isolated areas, we propose hybrid architecture based on DVB-S2/RCS+Wi-Fi networks. In this scenario the satellite channel is affected by deep rain events that do not allow ACM modes to protect data. Moreover,...
Article
SUMMARY In the not so distant future, we envisage an Internet where the biggest share of capacity is used by streaming applications. To avoid congestion collapse from unresponsive flows calls for a robust and ubiquitous end-to-end multimedia congestion control mechanism, such as TCP-friendly rate control (TFRC), which provides fair sharing with the...
Article
Full-text available
We present a measurement-based model of the frame error process on a Wi-Fi channel in rural environments. Measures are obtained in controlled conditions, and careful statistical analysis is performed on the data, providing information which the network simulation literature is lacking. Results indicate that most network simulators use a frame loss...
Article
One of the aims of the SatNEx (Satellite Network of Excellence, http://www.satnex.de) European project is to provide the scientific community that operates on satellite communications with measurement campaign results and evaluation tools, in order to support research activities that investigate problems in satellite communications at different lev...
Chapter
Full-text available
Broadcasting is an efficient and scalable way of transmitting data over wireless channels to an unlimited number of clients. In this chapter the problem of allocating data to multiple channels is studied, assuming flat data scheduling per channel and the presence of unrecoverable channel transmission errors. The behavior of wireless channels is des...
Article
Exchanging simulation data among simulation practitioners is to a great extent hindered by the use of different kinds of data formats in simulation software packages. The purpose of the CostGlue project is to facilitate the exchange of simulation data in the field of telecommunications. We propose a common data interchange format and a data exchang...
Article
An XML schema for scientific metadata is described. It is used for the CostGlue archival program, developed in the framework of the European Union COST Action 285: "Modelling and simulation tools for research in emerging multi-service telecommunications". The schema is freely available under the GNU LGPL license at urlhttp://wnet.isti.cnr.it/softwa...
Chapter
In the field of simulations storing and exchanging simulation data are important tasks. The quantity of simulation data can be rather big and at the same time this data can appear in different formats. The conversion of big quantities of data can be extremely time-consuming. In this article we focus on simulations in telecommunications. Therefore w...
Chapter
Full-text available
In the field of simulations storing and exchanging simulation data are important tasks. The quantity of simulation data can be rather big and at the same time this data can appear in different formats. The conversion of big quantities of data can be extremely time-consuming. In this article we focus on simulations in telecommunications. Therefore w...
Chapter
The main challenges to be faced by transport protocols using a satellite link are the variability of the channel, due to weather conditions and the large propagation delay. Adaptive network management and control algorithms are therefore desirable to guarantee the Quality of Service (QoS) to data flows over Additive White Gaussian Noise (AWGN) chan...
Conference Paper
Full-text available
Commonly used frame loss models for simulations over Wi-Fi channels assume a simple double regression model with threshold. This model is widely accepted, but few measurements are available in the literature that try to validate it. As far as we know, none of them is based on field trials at the frame level. We present a series of measurements for...
Article
SUMMARY Designing efficient transmission mechanisms for advanced satellite networks is a demanding task, requiring the definition and the implementation of protocols and architectures well suited to this challenging environment. In particular, transport protocols performance over satellite networks is impaired by the characteristics of the satellit...
Article
Full-text available
Though storing and exchanging simulation data is a rather simple task done by simulation practitioners, it is quite often a challenge as huge quantities of data are not uncommon, and conversion between different formats can be much time consuming. After examining some of the needs of the telecommunications simulation community, we describe the arch...
Chapter
Full-text available
The Internet protocols have become the worldwide standard for network and transport protocols and are increasingly used in satellite communication networks. Also traditional telecommunication and broadcast applications like VoIP and video streaming are transported over the Internet, although it does not support natively applications with tight QoS...
Conference Paper
Satellite systems are evolving towards higher available bandwidths and dynamic allocation based on instantaneous traffic rates offered at the stations, so called BoD (bandwidth on demand) channel sharing. This trend is paired with more and more powerful error correcting schemes, like those adopted in the recent DVB-S2 standard, which promise to mak...
Chapter
Researchers performing simulations in the field of computer telecommunications are often faced with the time-consuming task of converting huge quantities of data to and from different formats. We examine some of the requirements of the telecommunications simulation community and propose an architecture for a general purpose archiver and converter f...
Chapter
Researchers performing simulations work in the field of computer telecommunications are often faced with the time-consuming task of converting huge quantities of data to and from different formats. We examine some of the requirements of the telecommunications simulation community and propose an architecture for a general purpose archiver and conver...
Article
Full-text available
Few researchers have performed measurements of a Wi-Fi channel at the frame level in order to understand performance issues by relating frame errors and signal strength. This paper presents results relative to ad hoc measurements in a rural environment. We show that a simple double regression propagation model like the one used in the ns-2 simulato...
Article
Full-text available
Few researchers have undertaken the task of measuring the wireless channel at the frame level to understand performance issues related to frame loss and signal strength. This paper proposes a measurement procedure for terrestrial wireless networks based on cheap hardware and custom software, and validates it through experiments on real-word wireles...
Conference Paper
Full-text available
Hybrid networks where packets travel through both a geostationary satellite and a terrestrial local wireless link are a particularly challenging environment with respect to TCP performance. The reason is that such networks exhibit both a high latency and a high packet loss, a combination that stresses TCP's congestion avoidance algorithm. Accurate...
Conference Paper
Full-text available
In a heterogeneous MANET, based on wireless LANs linked together by satellite, the overall channel efficiency is impaired by multiple effects, because of multipath fading in the terrestrial segment and atmospheric fading on the satellite link. In this paper we address this issue by applying forward erasure correction codes (FZC) to MPEG-4 video seq...
Article
Full-text available
Inaheterogeneous MANET,based onwireless LANs linked together bysatellite, theoverall channel efficiency is impaired bymultiple effects, because ofmultipath fading inthe terrestrial segment andatmospheric fading onthesatellite link. Inthis paper weaddress this issue byapplying forward erasure correction codes(FZC)toMPEG-4video sequences exchanged by...
Conference Paper
Free software licenses are a natural choice in a research environment. In the following, we will try to back this simple statement with some considerations and examples, in an effort to analyse the significant interactions between free software and research.
Article
Bluetooth and IEEE 802.11 (Wi-Fi) are two communication protocol standards that define a physical layer and a MAC layer for wireless communications within a short range (from a few meters up to 100 m) with low power consumption (from less than 1 mW up to 100 mW). Bluetooth is oriented to connecting close devices, serving as a substitute for cables,...
Conference Paper
The optimization of the end-to-end throughput of a TCP connection over geostationary satellite links is a challenging research topic because the high delay-bandwidth product, together with a non-negligible random loss of packets, are conditions which differ considerably from the original environment for which TCP was originally designed. As a resul...
Article
The optimization of the end-to-end throughput of a TCP connection over geostationary satellite links is a challenging research topic because the high delay-bandwidth product, together with a non-negligible random loss of packets, are conditions which differ considerably from the original environment for which TCP was originally designed. As a resul...
Article
this paper is orthogonal to all these techniques (apart from link-level FEC [4], a similar but less general concept). It operates at the physical or link level, by trading the bandwidth of the wireless hop for packet loss rate. It does not interfere in any way with the normal behaviour of the TCP stack, but simply entails the wireless link paramete...
Article
All other conditions being equal, the end-to-end throughput of a TCP connection depends on the packet loss rate at the IP level. This is an issue when IP runs on a wireless link, where the bit error rate is variable and typically much higher than it is on fixed links. Especially on physical links where the bandwidth delay product is high, TCP perfo...
Article
This paper presents a multi-application traffic generator (MTG), aimed at the generation of packets over a LAN. The generated traffic simulates the one produced by a number of both isochronous and anisochronous applications, thus allowing the measurement of a number of parameters relevant to the communication network. From a test point of view, dat...
Article
Full-text available
We present GaliLEO, a simulator for the transmis- sion of connection-oriented traffic over a constellation of LEO/MEO (Low / Medium Earth Orbit) satellites. Its scope is limited to the satellites and the stations accessing them , without any modelling of the terrestrial network, but insid e this scope the goal is to study the performance of satelli...
Article
Integrated services over a shared satellite channel need a MAC protocol that is able to deal with real-time traffic without substantially affecting the efficiency of the shared medium. Due to its bursty nature, MPEG coded VBR video transmission is one of the most challenging real-time applications. In this paper, we analyse the statistical performa...
Chapter
Complex communication systems where satellite links are involved are difficult to test and tune up without the help of simulation tools. First of all, using satellites is very expensive - the satellite time spent in testing and tuning-up the system must thus be as short as possible. Second, during the performance evaluation in a real environment it...
Chapter
We present Galileo, a simulator for the transmission of both connection-oriented and connectionless traffic over a constellation of LEO/MEO (Low / Medium Earth Orbit) satellites. Its scope is limited to the satellites and the stations accessing them, without any modelling of the terrestrial network, but inside this scope the goal is to study the pe...