# purgedpot.bib

@article{R32:WiFi-probes-AHN18,
author = {Francesco Potort\i and Antonino Crivello and Michele Girolami and, Emilia
Traficante and Paolo Barsocchi},
title = {Localising crowds through {Wi-Fi} probes},
year = 2018,
volume = {75–76},
month = jun,
pages = {87–97},
abstract = {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 probes are
generated sparsely and often anonymised, which hinders the possibility of using them for
targeted localisation or tracking. However, by experimenting in three different indoor
environments, we demonstrate for the first time that it is possible to extract from them some
positioning information. Possible applications include identifying frequented regions where
many people are gathered together. In the described experimentation with sniffing devices we
to changes in the environment. The same process can be carried out using the Wi-Fi access
points already installed in the environment, thus allowing for operation free of installation,
surveying and maintenance.},
keywords = {passive indoor localisation; survey-free fingerprinting; Wi-Fi probe
eavesdropping},
email = {mailto:Potorti@isti.cnr.it},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/WiFi-probes-AHN18.pdf},
entrydate = 20180327,
entryby = {pot}
}

@article{R31:DFL-comparison-IETWSS18,
author = {Francesco Potort\i and Pietro Cassar\a and Paolo Barsocchi},
title = {Device-free indoor localisation with small numbers of anchors},
journal = {IET Wireless Sensor Systems},
year = 2018,
volume = 8,
number = 4,
month = aug,
day = 9,
pages = {152–161},
abstract = {Device-free indoor localisation based on RSS is unobtrusive and cheap. In a
world where most environment 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. Starting from
state of the art, several step are needed to reach this aim, the first of which are tackled in
this paper. The most promising algorithms from the literature are used to experiment in a
real-world environment and with a rigorous measurement and analysis framework. Their
positioning error performance is analysed versus number and position of devices. The original
results obtained show that the currently available RSS-based device-free indoor localisation
methods may be well suited to serve as a basis for providing a cheap localisation service in
smart environments rich in IoT radio devices.},
keywords = {computerised tomography; indoor radio; position measurement; remote sensing;
performance evaluation; ZigBee},
doi = {10.1049/iet-wss.2017.0153},
email = {mailto:Potorti@isti.cnr.it},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/DFL-comparison-IETWSS18.pdf},
entrydate = 20180213,
entryby = {pot}
}

@article{R30:EvAAL-IPIN16-MDPISensor17,
author = {Potort\i, Francesco and Park, Sangjoon and Jim\'enez Ruiz, Antonio Ram\on and
Barsocchi, Paolo and Girolami, Michele and Crivello, Antonino and Lee, So Yeon and Lim, Jae
Hyun and Torres-Sospedra, Joaqu\'in and Seco, Fernando and Montoliu, Raul and Mendoza-Silva,
Germ\'an Martin and P\'erez Rubio, Maria Del Carmen and Losada-Guti\'errez, Cristina and Espinosa,
Felipe and Macias-Guarasa, Javier},
title = {Comparing the Performance of Indoor Localization Systems through the EvAAL
Framework},
journal = {Sensors},
publisher = {MDPI},
year = 2017,
volume = 17,
number = 10,
month = oct,
abstract = {In recent years, indoor localization systems have been the object of
significant research activity and of growing interest for their great expected social impact
activity monitoring, personalized advertising, Active and Assisted Living (AAL), traceability,
Internet of Things (IoT) networks, and Home-land Security. In spite of the numerous research
advances and the great industrial interest, no canned solutions have yet been defined. The
diversity and heterogeneity of applications, scenarios, sensor and user requirements, make it
difficult to create uniform solutions. From that diverse reality, a main problem is derived
that consists in the lack of a consensus both in terms of the metrics and the procedures used
to measure the performance of the different indoor localization and navigation proposals. This
paper introduces the general lines of the EvAAL benchmarking framework, which is aimed at a
fair comparison of indoor positioning systems through a challenging competition under complex,
realistic conditions. To evaluate the framework capabilities, we show how it was used in the
2016 Indoor Positioning and Indoor Navigation (IPIN) Competition. The 2016 IPIN competition
considered three different scenario dimensions, with a variety of use cases: (1) pedestrian
versus robotic navigation, (2) smartphones versus custom hardware usage and (3) real-time
positioning versus off-line post-processing. A total of four competition tracks were evaluated
under the same EvAAL benchmark framework in order to validate its potential to become a
standard for evaluating indoor localization solutions. The experience gained during the
competition and feedback from track organizers and competitors showed that the EvAAL framework
is flexible enough to successfully fit the very different tracks and appears adequate to
compare indoor positioning systems.},
keywords = {indoor localization; indoor navigation; indoor competition; standard
evaluation metrics; benchmarking; performance evaluation; Active and Assisted Living;
acmclass = {B4.4.4 Performance Analysis and Design Aids, Verification},
doi = {10.3390/s17102327},
issn = {1424-8220},
email = {mailto:Potorti@isti.cnr.it},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/EvAAL-IPIN16-MDPISensors17.pdf},
entrydate = 20171013,
entryby = {pot}
}

@article{R29:EvAAL-softonly-JAISE15,
author = {Francesco Potort\i and Filippo Palumbo},
title = {{CEO}: a Context Event Only indoor localization technique for {AAL}},
pages = {745–760},
journal = {Journal of Ambient Intelligence and Smart Environments (JAISE)},
year = 2015,
volume = 7,
number = 6,
month = nov,
abstract = {{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
positioning sensors. In this scenario, one can exploit simple binary sensors that are usually
present in the smart environment, such as light and appliance switches or intrusion detection
sensors, to obtain a rough estimate of the position of the user. This application is
device-free, meaning that the user is not required to carry any device in order to be
localized. In this paper we present {CEO}, a software-only system which we evaluate along the
technical guidelines of the {EvAAL} competition. While the localization performance of {CEO}
is lower with respect to most {EvAAL} competitors of past editions, it has the benefit of
being non-intrusive, easy to install and perfectly compatible with other software systems:
these characteristics would made it a potentially significant {EvAAL} competitor. While
developing {CEO}, we only exploited the definition of the {EvAAL} competition environment as
it was presented to competitors. The only inputs to {CEO} are the context events generated
during the competition, which in 2012 and 2013 were limited to pressing light switches and
using a stationary bicycle. We compare the performance of {CEO} against the results of those
editions of {EvAAL} and show how it can be used to easily improve the performance of any
{EvAAL} competitor.},
keywords = {AAL; AmI; indoor localization; tracking},
acmclass = {B4.4.4 Performance Analysis and Design Aids, Verification},
publisher = {IOS Press},
doi = {10.3233/AIS-150343},
email = {mailto:Potorti@isti.cnr.it},
url = {http://content.iospress.com/articles/journal-of-ambient-intelligence-and-smart-environments/ais343},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/EvAAL-softonly-JAISE15.pdf},
entrydate = 20141127,
entryby = {pot}
}

@article{R28:EvAAL-IEEEPCM13,
author = {Paolo Barsocchi and Stefano Chessa and Francesco Furfari and Francesco
Potort\i},
title = {Evaluating {AAL} solutions through competitive benchmarking: the localization
competition},
pages = {72–79},
journal = {IEEE Pervasive Computing Magazine},
year = 2013,
volume = 12,
number = 4,
month = oct # {–} # dec,
abstract = {Evaluation of Ambient Assisted Living ({AAL}) systems is particularly
challenging due to the complexity of such systems and to the variety of solutions adopted and
services offered. This problem is related to the evaluation of pervasive and ubiquitous
systems that has been the focus of many researchers in the recent years and that still awaits
for solutions. On the other hand, analyzing and comparing {AAL} solutions is paramount for the
assessment of the research results in this area. {EvAAL} (Evaluating {AAL} Systems Through
Competitive Benchmarking) is a recently established international competition that aims to
address this problem in order to let benchmarking and comparison methodologies of {AAL}
systems emerge from experience. This work describes the first {EvAAL} competition which was
devoted to localization and tracking; proposed evaluation criteria, benchmarks, and achieved
results are reported. All evaluation data are freely available from the {EvAAL} web site.},
keywords = {AAL; AmI; indoor localization; tracking},
acmclass = {B4.4.4 Performance Analysis and Design Aids, Verification},
issn = {1536-1268},
publisher = {IEEE Computer Society},
address = {Los Alamitos, CA, USA},
doi = {10.1109/MPRV.2013.23},
email = {mailto:Potorti@isti.cnr.it},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/EvAAL-IEEEPCM13.pdf},
entrydate = 20121128,
entryby = {pot}
}

@article{R27:Rehabilitation-TITB11,
author = {Anda Guraliuc and Paolo Nepa and Paolo Barsocchi and Francesco Potort\i},
title = {Limb movements classification using wearable wireless transceivers},
pages = {474–480},
journal = {IEEE Transactions on Information Technology in Biomedicine},
year = 2011,
volume = 15,
number = 3,
month = may,
abstract = {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. The key
idea of this work is to exploit their presence by collecting the received signal strength
measured between those worn by a person. The measurements are used to classify a set of
kinesiotherapy activities. The collected data are classified using both {Support Vector
Machine} and {K-Nearest Neighbour} methods, in order to recognise the different activities.},
keywords = {Classification of human limbs activities; K-Nearest Neighbour (K-NN); Received
Signal Strength (RSS); Support Vector Machine (SVM); wearable wireless devices},
acmclass = {C.3 Real-time and embedded systems; G.3 Nonparametric statistics; I.2.6
Learning},
doi = {10.1109/TITB.2011.2118763},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Rehabilitation-TITB11.pdf},
entrydate = 20110310,
entryby = {pot}
}

@article{R26:Brew-WLNet09,
author = {Paolo Barsocchi and Alan Bertossi and Cristina Pinotti and Francesco
Potort\i},
title = {Allocating data for broadcasting over wireless channels subject to
transmission errors},
pages = {355–365},
journal = {Wireless Networks},
year = 2010,
volume = 16,
number = 2,
month = feb,
abstract = {Broadcasting is an efficient and scalable way of transmitting data 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 minimizing the
average expected delay experienced by the clients. Two different channel error models are
considered: the Bernoulli model and the simplified Gilbert-Elliot one. In the former model,
each packet transmission has the same probability to fail and each transmission error is
independent from the others. In the latter one, bursts of erroneous or error-free packet
transmissions due to wireless fading channels are modeled. Particular cases are detected where
optimal solutions can be found in polynomial time. For general cases, simulations show that
good sub-optimal solutions can be found on benchmarks whose item popularities follow Zipf
distributions.},
keywords = {wireless communication; data broadcasting; multiple channels; flat scheduling;
average expected delay; channel transmission errors; Bernoulli model; Gilbert-Elliot model;
heuristics},
acmclass = {C.2 Computer-Communication Network; F.2 Analysis of Algorithms and Problem
Complexity},
doi = {10.1007/s11276-008-0136-z},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Brew-WLNet09.pdf},
entrydate = 20080816,
entryby = {pot}
}

@article{R25:Damatfrc-IJCSN09,
author = {Raffaello Secchi and Arjuna Sathiaseelan and Francesco Potort\i and Alberto
Gotta and Gorry Fairhurst},
title = {Using {Quick-Start} to enhance {TCP Friendly Rate Control} performance in
bidirectional satellite networks},
pages = {141–161},
journal = {International Journal of Satellite Communications and Networking},
year = 2009,
volume = 27,
number = 3,
month = may # {–} # jun,
abstract = {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) that provides fair sharing with the other Internet
traffic. This paper therefore analyses the implications of using rate-adaptive congestion
control over satellite links that utilise Demand Allocation Multiple Access (DAMA) to maximise
satellite transponder utilisation. The interaction between TFRC with DAMA is explored using
simulations supported by fluidic flow models. The analysis shows that DAMA slows-down the
start-up phase of TFRC, causing non- negligible delays. To mitigate this problem, we propose a
new cross-layer method based on the Quick-Start (QS) mechanism. This can accelerate the
start-up of multimedia flows by judicious allocation of additional capacity derived from
cross-layer signalling.},
keywords = {multimedia; TFRC; satellites; DAMA; Quick Start},
acmclass = {B.8.2 Performance Analysis and Design Aids; C.2.2 Network Protocols
Applications; H.4.3 Communications Applications; K.1 Standards},
doi = {10.1002/sat.929},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Damatfrc-IJSCN09.pdf},
entrydate = 20090113,
entryby = {pot}
}

@article{R24:Rural-model-TW09,
author = {Paolo Barsocchi and Gabriele Oligeri and Francesco Potort\i},
title = {Measurement-based frame error model for simulating outdoor {Wi-Fi} networks},
pages = {1154–1158},
journal = {IEEE Transactions on Wireless Communications},
year = 2009,
volume = 8,
number = 3,
month = mar,
abstract = {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 model that can miss important transmission impairments even at a short distance,
particularly when considering antenna radiation pattern anisotropy and multi-rate switching.},
keywords = {simulation; FER; two-ray; AWGN; fading},
acmclass = {B.8.2 Performance Analysis and Design Aids; C.2 Computer-Communication Networks},
doi = {10.1109/TWC.2009.060475},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Rural-model-TW09.pdf},
entrydate = 20081128,
entryby = {pot}
}

@article{R23:SatnexJA2410-IJSCN09,
author = {Tomaso de Cola and Luca Ronga and Tommaso Pecorella and Paolo Barsocchi and
Stefano Chessa and Erina Ferro and Alberto Gotta and Gabriele Oligeri and Francesco
Potort\i and Raffaello Secchi and Arjuna Sathiaseelan and Maria \'Angeles V\'azquez Castro
and Jos\'e Antonio del Peral Rosado and Carlo Caini and Rosario Firrincieli},
title = {Communications and networking over satellites: {SatNEx} experimental
activities and testbeds},
pages = {1–33},
journal = {International Journal of Satellite Communications and Networking},
year = 2009,
volume = 27,
number = 1,
month = jan # {–} # feb,
abstract = {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 simulation/emulation tools and measurement campaigns, in order
to support various research activities that investigate problems in satellite communications
at different levels of the OSI stack. In fact, the research activities developed in SatNEx
address the most relevant aspects of satellite communications, such as channel modulation and
coding schemes, access strategies, advanced networking, end-to-end quality of service,
transport performance, delay tolerant networks, and new applications. Even if SatNEx is mainly
devoted to satellite communications, integration of satellite and terrestrial wireless
segments has also been taken into account. This paper presents the results obtained in a
specific joint activity relevant to those trials and testbeds developed during the
project. The high number of authors of this paper is an indication of the strong collaborative
work sustained, the large measurement campaigns, and the complexity in setting up some tests.},
keywords = {satellite communications; testbeds; measurement tools; performance evaluation},
acmclass = {B.8.2 Performance Analysis and Design Aids; C.2.2 Network Protocols
Applications; H.4.3 Communications Applications; K.1 Standards; H},
doi = {10.1002/sat.921},
url = {http://www3.interscience.wiley.com/journal/104548349/issue},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/SatnexJA2410-IJSCN09.pdf},
entrydate = 20080816,
entryby = {pot}
}

@article{R22:Costglue-STSMSI08,
author = {Dragan Savi\'c and Francesco Potort\i and Francesco Furfari and Matev\v{z}
Pusti\v{s}ek and Sa\v{s}o Toma\v{z}i\v{c} and Janez Be\v{s}ter},
title = {{CostGlue}: simulation data exchange in telecommunications},
journal = {SIMULATION: Transactions of The Society for Modeling and Simulation International},
pages = {157–168},
year = 2008,
volume = 84,
number = 4,
month = apr,
abstract = {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
exchange model for raw simulation data, metadata and post-processing data. Based on this
model, we additionally propose a framework, CostGlue, designed for packaging simulation output
data into the common interchange format, launching post-processing plugins and exporting data
into input formats for various third party tools. As a proof of concept we have implemented
the framework as a software package and released it as free software.},
keywords = {simulation, measurements; data; archiving; HDF},
acmclass = {E.5 Files; D.2.12 Interoperability},
doi = {10.1177/0037549708093715},
url = {http://SIM.sagepub.com/content/vol84/issue4},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Costglue-STSMSI08.pdf},
entrydate = 20080604,
entryby = {pot}
}

@article{R21:TCPsat-IJSC06,
author = {Carlo Caini and Rosario Firrincieli and Mario Marchese and Tomaso de Cola and
Michele Luglio and Cesare Roseti and Nedo Celandroni and Francesco Potort\i},
title = {Transport layer protocols and architectures for satellite networks},
pages = {1–26},
journal = {International Journal of Satellite Communications and Networking},
year = 2007,
volume = 25,
number = 1,
month = jan # {–} # feb,
abstract = {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 satellite radio
link, specifically by the long propagation delay and the possible presence of segment losses
due to physical channel errors. The level of impact on performance depends upon the link
design (type of constellation, link margin, coding and modulation) and operational conditions
aspects a number of possible solutions have been presented in the literature, ranging from
limited modifications of standard protocols (e.g. TCP, transmission control protocol) to
completely alternative protocol and network architectures. However, despite the great number
of different proposals (or perhaps also because of it), the general framework appears quite
fragmented and there is a compelling need of an integration of the research competences and
efforts. This is actually the intent of the transport protocols research line within the
European SatNEx (Satellite Network of Excellence) project. Stemming from the authors' work on
this project, this paper aims to provide the reader with an updated overview of all the
possible approaches that can be pursued to overcome the limitations of current transport
protocols and architectures, when applied to satellite communications. In the paper the
possible solutions are classified in the following categories: optimization of TCP
interactions with lower layers, TCP enhancements, performance enhancement proxies (PEP) and
delay tolerant networks (DTN). Advantages and disadvantages of the different approaches, as
well as their interactions, are investigated and discussed, taking into account performance
improvement, complexity, and compliance to the standard semantics. From this analysis, it
emerges that DTN architectures could integrate some of the most efficient solutions from the
other categories, by inserting them in a new rigorous framework. These innovative
architectures therefore may represent a promising solution for solving some of the important
problems posed at the transport layer by satellite networks, at least in a medium-to-long term
perspective.},
keywords = {transport protocols; TCP; satellite networks; PEP; DTN},
acmclass = {C.2.1 Network Architecture and Design},
doi = {10.1002/sat.855},
url = {http://www3.interscience.wiley.com/cgi-bin/jissue/114027025},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/TCPsat-IJSC06.pdf},
entrydate = 20061019,
entryby = {pot}
}

@article{R20:WiFiBluetooth-IEEEWCm05,
author = {Erina Ferro and Francesco Potort\i},
title = {Bluetooth and {Wi-Fi} wireless protocols: a survey and a comparison},
pages = {12–26},
journal = {IEEE Wireless Communications},
year = 2005,
volume = 12,
number = 1,
month = feb,
abstract = {Bluetooth and IEEE 802.11 (Wi-Fi) are two communication protocol standards
which define a physical layer and a MAC layer for wireless communications within a short range
(from a few meters up to 100 meters) 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,
while Wi-Fi is oriented towards computer-to-computer connections, as an extension of or
substitution for cabled LANs. In this paper we offer an overview of these popular wireless
communication standards, comparing their main features and behaviors in terms of various
metrics, including capacity, network topology, security, quality of service support, and power
consumption.},
keywords = {Bluetooth; Wi-Fi; 802.11; comparison; tutorial},
issn = {1536-1284/05/$$20.00}, doi = {10.1109/MWC.2005.1404569}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/WiFiBluetooth-IEEEWCm05.pdf}, entrydate = 20040701, entryby = {pot} }  @article{R19:TCP-IJCS03, author = {Nedo Celandroni and Francesco Potort\i}, title = {Maximising single connection {TCP} goodput by trading bandwidth for {BER}}, pages = {63–79}, journal = {International Journal of Communication Systems}, year = 2003, volume = 16, number = 1, month = feb, note = {Special issue on wireless access to the global internet: mobile radio networks and satellite systems}, abstract = {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 performance is significantly impaired by apparently low values of the bit error rate. Generally speaking, on a wireless link bandwidth can be traded for information quality (error rate), the simplest method being to change the type or parameters of forward error correction. On this basis, we show a general method of taking advantage of this trade-off in order to maximize the throughput of a TCP connection.}, keywords = {wireless; TCP; FEC; BER; packet loss; throughput; goodput}, doi = {10.1002/dac.580}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/TCP-IJCS03.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/TCP-IJCS03.ps.gz}, entrydate = 20021009, entryby = {Francesco Potortì } }  @article{R18:Galileo-SCS02, author = {Laurent Franck and Francesco Potort\i}, title = {{GaliLEO}: a simulation tool for {LEO} satellite constellations}, pages = {543–551}, journal = {SIMULATION: Transactions of The Society for Modeling and Simulation International}, year = 2002, volume = 78, number = 9, month = sep, abstract = {We present GaliLEO, a simulator for the transmission 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 inside this scope the goal is to study the performance of satellite-based communication networks from as many as possible points of view at the network level. Typical applications include simulation of access techniques, routing policies, fault management. The simulator is written in Java, and it makes use of dynamic loading to easily integrate user-written modules. A draft manual is available, and a preliminary version of the program has been published at the end of 2000.}, keywords = {LEO; simulation; simulator; satellites; java}, issn = {0037-5497}, url = {http://www.scs.org/}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/GaliLEO-SCS02.pdf}, entrydate = 20021011, entryby = {Francesco Potortì } }  @article{R17:VnL-IJSC02, author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i}, title = {A multi-level satellite channel allocation algorithm for real-time {VBR} data}, pages = {47–61}, journal = {International Journal of Satellite Communications}, year = 2002, volume = 20, number = 1, month = jan # {–} # feb, abstract = {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. Because of its bursty nature, MPEG coded VBR video transmission is one of the most challenging real-time applications. In this paper we analyse the statistical performance of a simple allocation method for VBR traffic by using an accurate statistical model of an MPEG-2 VBR coded movie, which exhibits a peak to mean ratio of about 4. The results were obtained both analytically and by simulation, and show that our method is suitable for transmitting non-interactive video and best-effort traffic on the same satellite link.}, keywords = {satellite; VBR; MPEG-2; bursty traffic; packet delay; channel efficiency; allocation levels}, doi = {10.1002/sat.708}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/VnL-IJSC02.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/VnL-IJSC02.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R16:GSn-ETT01, author = {Enrico Gregori and Riccardo Marcantonio and Francesco Potort\i}, title = {{GSn}: a new service type for integrated services on the Internet}, pages = {3–12}, journal = {European Transactions on Telecommunications}, year = 2001, volume = 12, number = 1, month = jan # {–} # feb, abstract = {Network services with deterministic guarantees are based on a worst-case description of user-generated traffic. When designing a policing and scheduling algorithm for guaranteed services on the Internet, accuracy of description of the traffic profile has to be traded with simplicity of implementation. The result of this trade off is often expressed as the number of token buckets required by the service along with the choice of their parameters. The GS type of service proposed by the IETF uses two token buckets both for characterizing the traffic and for policing it. The choice of using only two token buckets is primarily driven by policing costs. In this paper we propose a method that allows the number of token buckets used for characterizing the traffic to be greater than what is actually needed to police it. This means we can obtain an accurate profile of the traffic while keeping policing simple. The method consists of computing a profile of the traffic which involves a number of token buckets of the order of ten, and then doing the policing using only the first token bucket, plus another one which is chosen depending on the delay requirements of the receivers. This paper shows that with this simple enhancement we obtain a guaranteed service whose performance closely approaches the theoretical limits of services with deterministic guarantees.}, keywords = {Internet; integrated services; guaranteed service; GS}, issn = {1124-318X}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/GSn-ETT01.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/GSn-ETT01.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R15:FadeCountermeasure-JCN00, author = {Nedo Celandroni and Francesco Potort\i}, title = {Fade countermeasure using signal degradation estimation for demand-assignment satellite systems}, pages = {230–238}, journal = {Journal of Communications and Networks}, year = 2000, volume = 2, number = 3, month = sep, abstract = {This paper describes a complete fade countermeasure system, designed for thin route user-oriented and fully meshed satellite networks. The signal degradation due to the residual uplink attenuation after up-power control intervention, plus the down-link attenuation, is compensated for by varying the FEC coding and bit rates of the data. Down and up-link signal degradations are evaluated separately: the former by collecting statistics of quantised levels of the demodulated PSK signal, and the latter by using a narrow band signal level estimator. Measurement times are optimised using a model to evaluate the scintillation variance. The performance evaluation of the whole system in the presence of additive white Gaussian noise (AWGN), shows that very small link power margins can be adopted.}, keywords = {fade countermeasure; scintillation; FEC; signal quality estimation; power margin}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/FadeCountermeasure-JCN00.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/FadeCountermeasure-JCN00.ps.gz}, entryby = {Francesco Potortì } }  @article{R14:DRScompression-ETT00, author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i and Antonio Chimienti and Maurizio Lucenteforte}, title = {Dynamic rate shaping on {MPEG-2} video streams for bandwidth saving on a faded satellite link}, pages = {363–372}, journal = {European Transactions on Telecommunications}, year = 2000, volume = 11, number = 4, month = jul # {–} # aug, note = {Special issue on service quality control in multimedia wireless networks}, abstract = {In a previous work, we studied how to send a video stream over a noisy satellite channel using the scalability features of the MPEG-2 standard. The base and the enhancement flows were sent with different levels of protection (bit and coding rates) in order to deal with the channel degradation. In this paper, we add Dynamic Rate Shaping (DRS), thus obtaining a greater flexibility in the choice of transmission parameters. In fact, it is possible to trim the required bandwidth in continuous mode in the working range, thus saving some bandwidth when keeping the video quality constant during changing fade conditions. The performances of DRS applied to both the non-scalable and the scalable MPEG-2 coded video streams are shown separately. An application of the techniques presented is discussed, and some criteria are given for choosing the most suitable parameters, according to the service quality requirements.}, keywords = {VBR; DSR; MPEG; scalability; layers; fading; satellites; noisy link; errors; video quality}, issn = {1124-318X}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/DRScompression-ETT00.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/DRScompression-ETT00.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R13:NoisyVBR-MMToolsAppl00, author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i and Antonio Chimienti and Maurizio Lucenteforte and Romualdo Picco}, title = {{MPEG-2} coded video traces transmitted over a satellite link: scalable and non-scalable solutions in rain fading conditions}, pages = {73–97}, journal = {Multimedia Tools and Applications}, year = 2000, volume = 10, number = 1, month = jan, abstract = {The literature is poor in the analyses of the effects produced by corrupted bits in compressed video bitstreams. This paper presents the results of a transmission experiment of MPEG-2 coded video data over a satellite link affected by noise, in order to investigate under which conditions this type of transmission is economically feasible. The signal-to-noise ratio scalability feature of the MPEG-2 encoder was used to produce different bitstreams of the same movie sequence. The scope of the study was to verify which are the best combinations of video and channel codings in the presence of attenuation on the satellite link, in order to optimize the bandwidth utilisation for a requested image quality. The results obtained give indications about the data channel codings to be used to counter the rain fade on the transmission link, which is a non negligible problem especially when satellite transmissions are in the Ka band. Moreover, the results highlight the flexibility of the scalable video coding in the examined scenario.}, keywords = {MPEG video; scalability; quality factor; satellite; fading}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/NoisyVBR-MMToolsAppl00.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/NoisyVBR-MMToolsAppl00.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R12:Fracas-TelCommSystems99, author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i}, title = {A simulation tool to validate and compare satellite {TDMA} access schemes}, pages = {21–37}, journal = {Telecommunication Systems}, year = 1999, volume = 12, number = 1, abstract = {This paper proposes an architecture design for a tool suitable for emulating DA-TDMA (demand-assignment-time division multiple access) satellite access schemes. The tool presented, named FRACAS (for FRAmed Channel Access Simulator) , is particularly suitable for comparing the performance of different satellite channel allocation policies. Using Fracas, a service provider can choose from different policies for sharing a satellite channel among a number of users. Some allocation policies, selected from those available in the literature, are built-in, while others can be designed from scratch and added without much effort. The parameters of the built-in allocation policies can easily be changed in order to exploit the full potential of the allocation schemes. Fracas' features permit the optimisation of satellite resource usage in accordance with the traffic pattern supported. Fracas enables research teams and students to explore and compare different multiple access schemes, and to develop simulation runs for various kinds of service-induced traffic, including aggregate traffic, which is typical in a local area network (LAN) interconnection environment.}, keywords = {emulator; simulator; satellite access schemes; performance comparison; TDMA; aggregate traffic}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Fracas-TelCommSystems99.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/Fracas-TelCommSystems99.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R11:FractalKa-JSAC99, author = {Nedo Celandroni and Francesco Potort\i}, title = {Modeling {Ka} band scintillation as a fractal process}, pages = {164–172}, journal = {IEEE Journal on Selected Areas in Communications}, year = 1999, volume = 17, number = 2, month = feb, note = {Direct-to-user satellite systems and technologies at Ka band and beyond}, abstract = {We propose a model that describes the signal fading process due to scintillation in the presence of rain. We analyzed a data set of up-link (30 GHz) and down-link (20 GHz) attenuation values averaged over 1 second intervals. The data are samples relative to 10 significant events, for a total of 180,000 s, recorded at the Spino d'Adda (North of Italy) station using the Olympus satellite. Our analysis is based on the fact that the plot of attenuation versus time recalls the behaviour of a self-similar process. We then make various considerations and propose a fractional Brownian motion model for the scintillation process. We describe the model in detail, with pictures showing the apparent self-similarity of the measured data. We then show that the Hurst parameter of the process is a simple function of the rain fade. We describe a method for producing random data that interpolate the measured samples, while preserving some of their interesting statistical properties. This method can be used for simulating fade countermeasure systems. As a possible application of the model, we show how to optimise fade measurement times for fade countermeasure systems.}, keywords = {scintillation; rain fade; fractal model; signal degradation; fade countermeasures}, issn = {0733-8716}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/FractalKa-JSAC99.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/FractalKa-JSAC99.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R10:V2L-IJSC97, author = {Nedo Celandroni and Marco Conti and Erina Ferro and Enrico Gregori and Francesco Potort\i}, title = {A bandwidth assignment algorithm on a satellite channel for {VBR} traffic}, pages = {237–246}, journal = {International Journal of Satellite Communications}, year = 1997, volume = 15, number = 6, month = nov # {–} # dec, abstract = {Variable Bit Rate (VBR) video is currently by far the most interesting and challenging real-time application. A VBR encoder attempts to keep the quality of video output constant, and at the same time reduces bandwidth requirements since only a minimum amount of information has to be transferred. On the other hand, as VBR video traffic is both highly variable and delay sensitive, high-speed networks (e.g. ATM) are generally implemented by assigning peak rate bandwidths to VBR video applications. This approach may however be inefficient in a satellite network based on a TDMA scheme. To overcome this problem, we have designed a demand-assignment satellite bandwidth allocation algorithm in TDMA, named V2L-DA (VBR 2 Level-Demand Assignment), which manages the VBR video traffic according to a dynamic bandwidth allocation algorithm. In this paper we discuss how to tune the proposed algorithm in order to optimise network utilisation when MPEG-1 VBR video traffic is being transmitted. Our results indicate that most of the time only 40\% of the peak rate bandwidth is needed to satisfy the VBR source, and the remaining 60\% of the peak rate bandwidth can be used to transmit the datagram traffic queued in the network stations.}, keywords = {satellite; TDMA assignment; real-time traffic; non real-time traffic; VBR traffic; MPEG coding; traffic model}, doi = {10.1002/(SICI)1099-1247(199711/12)15:6<237::AID-SAT584>3.0.CO;2-8}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/V2L-IJSC97.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/V2L-IJSC97.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R09:DRIFS-IJSC97, author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i}, title = {{DRIFS-TDMA}: a proposal for satellite access distributed-control algorithm for multimedia traffic in a faded environment}, pages = {227–235}, journal = {International Journal of Satellite Communications}, year = 1997, volume = 15, number = 5, month = sep # {–} # oct, abstract = {Most demand assignment TDMA satellite access protocols use centralised-control access schemes rather than distributed ones because their simplicity and robustness usually compensate for the longer allocation delay. Starting from the FODA/IBEA centralised-control protocol, we studied two distributed-control protocols, named DRIFS and FEEDERS respectively, for accessing a geostationary satellite channel. Multimedia traffic and faded environments were considered in the study of both the access schemes. This paper presents the DRIFS proposal, together with the recovery procedures from critical events, whose handling is central to the discussion of a distributed satellite access protocol. Probabilities of such events are also estimated. Reference \cite{R08:FEEDERS-IJSC97} presents the FEEDERS proposal, while in \cite{R03:FODAIBEAvsDistributed-IJSC96} the reader can find the results of a comparison between the two schemes obtained by means of simulation.}, keywords = {satellite access scheme; distributed control; capacity allocation on demand; fading; multimedia traffic}, doi = {10.1002/(SICI)1099-1247(199709/10)15:5<227::AID-SAT578>3.0.CO;2-H}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/DRIFS-IJSC97.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/DRIFS-IJSC97.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R08:FEEDERS-IJSC97, author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i}, title = {{FEEDERS-TDMA}: a distributed-control algorithm for satellite channel capacity assignment in a mixed traffic and faded environment}, pages = {185–195}, journal = {International Journal of Satellite Communications}, year = 1997, volume = 15, number = 4, month = jul # {–} # aug, abstract = {This paper presents FEEDERS , an access scheme for sharing, in TDMA mode, the capacity of a satellite channel among a number of stations, on the basis of user demand. This scheme and its companion, DRIFS \cite{R09:DRIFS-IJSC97}, result from a study carried out by the authors on distributed- control protocols for geostationary satellite access. Both protocols derive from the FODA/IBEA centralised-control system and have the same features. The distributed technique to compute the capacity allocation adopted by FEEDERS improves some performance in FODA/IBEA, but raises a problem about system stability. Techniques to solve this problem are presented, together with system performance. A comparison is also made with the FODA/IBEA system, though a more detailed comparison can be found in \cite{R03:FODAIBEAvsDistributed-IJSC96}, where DRIFS, FEEDERS and FODA/IBEA systems are all compared.}, keywords = {satellite access scheme; distributed control; capacity allocation on demand; fading; isochronous traffic; anisochronous traffic}, doi = {10.1002/(SICI)1099-1247(199707/08)15:4<185::AID-SAT579>3.0.CO;2-L}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/FEEDERS-IJSC97.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/FEEDERS-IJSC97.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R07:FODAIBEAvsCFRA-IJSC97, author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i and G\'erard Maral}, title = {Delay analysis for interlan traffic using two suitable {TDMA} satellite access schemes}, pages = {141–153}, journal = {International Journal of Satellite Communications}, year = 1997, volume = 15, number = 4, month = jul # {–} # aug, abstract = {Two demand assignment TDMA satellite access schemes that are suitable for providing flexible interconnections of local area networks are compared by means of simulation: FODA/IBEA and CFRA. A unique simulation tool was used, a meshed network of VSATs under the control of a master station was considered and similar networking conditions were applied to both access schemes. The generated traffic had two components having different level of burstiness: bulk traffic and interactive traffic. The performance evaluated is the delay for each traffic component. We show that CFRA is best when connecting clusters of only a few stations and even individual ones exchanging light traffic. FODA/IBEA, on the other hand, is better suited to interconnect networks, or within networks with many hosts, where heavy traffic is more likely.}, keywords = {satellite; TDMA access schemes; comparison; bursty traffic; demand assignment; simulation}, doi = {10.1002/(SICI)1099-1247(199707/08)15:4<141::AID-SAT580>3.0.CO;2-Q}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/FODAIBEAvsCFRA-IJSC97.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/FODAIBEAvsCFRA-IJSC97.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R06:LevelQuality-IEEEComMag97, author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i}, title = {Quality estimation of {PSK} modulated signals}, pages = {50–55}, journal = {IEEE Communications Magazine}, year = 1997, month = jul, note = {Special issue on Broadband via satellite}, abstract = {A very important problem in fade countermeasure systems is the need to detect signal quality quickly and accurately. In fact, the countermeasure has to be initiated before the signal degradation effect on the bit error rate is detected by the user. This paper presents an overview of different methods to evaluate signal quality, which are based on the availability of soft quantized levels of PSK demodulated signals at the receiver. It is shown that this class of methods has a good theoretical performance. Also, an innovative procedure is presented which adapts one of the methods to some existing hardware, and tunes-up a set of parameters in order to compensate to the fact that the hardware is to some extent impaired.}, keywords = {soft quantisation; fade estimation; channel quality; satellite communications; viterbi decoder}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/LevelQuality-IEEEComMag97.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/LevelQuality-IEEEComMag97.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R05:MTG-RealTimeSystems97, author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i}, title = {A traffic generator for testing communication systems: presentation, implementation and performance}, pages = {50–55}, journal = {Real-Time Systems}, year = 1997, volume = 13, number = 1, month = jul, abstract = {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, data generated by the MTG system is equivalent to data generated by real applications spread over a LAN. The MTG system is presented, its implementation is described, some figures relevant to the MTG performance are shown, and the statistical analysis which can be performed on the recorded data is briefly introduced.}, keywords = {traffic generator; ethernet; unix; LAN}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/MTG-RealTimeSystems97.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/MTG-RealTimeSystems97.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R04:FODAIBEAexperimental-IJSC96, author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i}, title = {Experimental results of a demand-assignment thin route {TDMA} system}, pages = {113–126}, journal = {International Journal of Satellite Communications}, year = 1996, volume = 14, number = 2, month = mar # {–} # apr, abstract = {This paper presents the experimental results measured on the Italsat satellite when data is transmitted by using the FODA/IBEA satellite access scheme. The measures presented refer to the packet arrival time jitter, which affects the real-time data, and to the end-to-end delay of the non real-time data. The experimental results, obtained with four Italian active stations on Italsat confirm the analytical results. The paper also shows the advantage of working in pre-assignment mode, a feature of the capacity assignment algorithm which improves the end-to-end delay of non real-time data during the transient provoked by a traffic step when the system is scarcely loaded.}, keywords = {thin route TDMA; real-time data; capacity assignment on demand; jitter; leaky bucket; non-real-time data; end-to-end delay; pre-assignment mode; transient traffic, stationary traffic}, doi = {10.1002/(SICI)1099-1247(199603)14:2<113::AID-SAT543>3.0.CO;2-I}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/FODAIBEAexperimental-IJSC96.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/FODAIBEAexperimental-IJSC96.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R03:FODAIBEAvsDistributed-IJSC96, author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i}, title = {Comparison between distributed and centralised demand assignment {TDMA} satellite access schemes}, journal = {International Journal of Satellite Communications}, volume = 14, number = 2, pages = {95–111}, month = mar # {–} # apr, year = 1996, abstract = {This paper presents the performance measurements from a comparison between FODA/IBEA and two other satellite access schemes, FEEDERS and DRIFS. The three schemes differ in terms of the scheduling of the channel capacity: i.e. centralised control in FODA/IBEA and distributed in the other two. All these access schemes were designed at CNUCE, where the simulation tool used for the comparison was also developed. FODA/IBEA was developed and tested on several satellites (Olympus, Eutelsat and Italsat), and used in a project of LAN interconnection. The two distributed control access schemes have been studied and simulated to analyse the behaviour of the capacity assignment algorithm, while the recovery procedures needed for the network stability are presented in \cite{R08:FEEDERS-IJSC97} and \cite{R09:DRIFS-IJSC97}. All the access schemes support an aggregated traffic, and the quality of the data transmission is guaranteed even when the transmitting signal experiences a severe attenuation due to bad atmospheric conditions.}, keywords = {satellite; TDMA access schemes; distributed control; centralised control; comparison; aggregated traffic; traffic generatorts; fade countermeasure}, doi = {10.1002/(SICI)1099-1247(199603)14:2<95::AID-SAT542>3.0.CO;2-G}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/FODAIBEAvsDistributed-IJSC96.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/FODAIBEAvsDistributed-IJSC96.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R02:FODAIBEApractical-SIGCOMM95, author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i and Alessandro Bellini and Gianfranco Pirri}, title = {Practical experiences in interconnecting {LANs} via satellite}, journal = {ACM Computer Communication Review}, volume = 25, number = 5, pages = {56–58}, month = oct, year = 1995, abstract = {We present an experiment in interconnecting LANs via a satellite link and describe the individual components involved in the experiment. The project was developed in two phases: a) design and realisation of a satellite access scheme that supports real-time and non real-time traffic with a signal fading countermeasure, called FODA/IBEA-TDMA 1 ; b) interconnection of LANs where real-time and non real-time applications run. The experiment was presented the first time in June 1994 as a demo in which the Eutelsat satellite was used (in the 12/14 GHz band) to exchange data between two LANs in Pisa and Florence, while video and audio applications running on PCs connected the two sites. The demo was repeated a few weeks later and the Intelsat satellite was used in the 20/30 GHz band.}, keywords = {satellite; TDMA fade countermeasure; satellite LAN interconnection; satellite videoconference}, issn = {0146-4833}, pdf = {http://ccr.sigcomm.org/archive/1995/oct95/ccr-9510-celandroni.pdf}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{R01:FODAIBEApresentation-IJSC92, author = {Nedo Celandroni and Erina Ferro and Nick James and Francesco Potort\i}, title = {{FODA/IBEA-TDMA}: a flexible fade countermeasure system for integrated services in user oriented networks}, journal = {International Journal of Satellite Communications}, volume = 10, pages = {309–323}, month = dec, year = 1992, abstract = {A flexible, processor based, TDMA station has been implemented. This station and its associated variable data rate modem enables users to implement very complex frame structures under software control. Burst rates of 512 Kbit/s - 8.192 Mbit/s and different coding rates are possible allowing the transmitted bit energy from each station in the network to be adapted to prevailing conditions. The proposed application of the station is the transmission of mixed stream and packet traffic, in a LANs interconnection via satellite environment, using a modification of the FODA 5 technique. The association of the up-link power control feature with the bit and coding rate variation gives the system an interesting ability to cope with fade conditions. The link outage probability is investigated for the Olympus transponder in Ka band. The ability of the system, together with the good performance of Olympus, shows that the Ka band is usable for the above mentioned types of networks without prohibitive fade degradation, at least for limited coverages.}, keywords = {TDMA controller; variable bit rate modem; fade countermeasure; outage; multiple access; satellite network}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/FODAIBEApresentation-IJSC92.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/FODAIBEApresentation-IJSC92.ps.gz}, entrydate = 20000926, entryby = {Francesco Potortì } }  @article{M04:EvAAL-ErcimNews13, author = {Francesco Potort\i}, title = {{EvAAL} evaluation workshop}, journal = {Ercim News}, editor = {Peter Kunz and Carol Peters}, publisher = {ERCIM EEIG}, year = 2013, month = oct, pages = 54, number = 95, note = {Not peer reviewed}, abstract = {For the third consecutive year, the EvAAL competition gathered teams from all around the world to compare their systems in the participating living labs. EvAAL, a project embedded into the AALOA association, was led by the Institute of Information and Technologies (ISTI) of CNR (Pisa, IT) and was mostly financed by the universAAL FP7 project.}, keywords = {AAL, ambient assisted living, benchmark, competition, contest, localization}, acmclass = {B4.4.4 Performance Analysis and Design Aids, Verification}, issn = {0926-4981}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/EvAAL-ErcimNews13.pdf}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20131122, entryby = {pot} }  @article{M03:AALOA-AALsummit12, author = {Sten Hanke and Thomas Karopka and Francesco Furfari and Francesco Potort\i}, title = {To build up an ambient assisted living open association ({AALOA})}, pages = {–}, journal = {proceedings of the AAL summit}, year = 2012, month = jun, note = {Extended abstract}, abstract = {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 activities as well as the hosting of AAL related projects like EvAAL and several open source software projects1 has been used to attract different stakeholders of the AAL community. Two main initiatives for the AALOA community building and promotion of the idea among all stakeholder groups has been brought forth so far. The AMB11 workshop, organised together with the eInclusion unit of the EC and the Lecce Declaration, which gained support from 44 projects mostly at the EU level.}, days = {27–29}, keywords = {AAL, open source, community building}, acmclass = {C.2.4 Network Operating Systems; D.4.7 Distributed systems}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/AALOA-AALsummit12.pdf}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20121220, entryby = {pot} }  @article{M02:AALOA-PublicService12, author = {Thomas Karopka and Francesco Potort\i and Sten Hanke}, title = {Open Minds}, journal = {PS public service review}, editor = {Caroline Pennington}, publisher = {publicservice.co.uk Ltd}, year = 2012, number = 31, note = {Not peer reviewed}, abstract = {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 and create a win-win situation? One of the envisioned solutions is the application of assistive technology combined with newly created services to allow people to live an independent life for as long as possible. Research in this area involves many {ICT} related {R&D} disciplines and has attracted much attention in the last couple of years. Several initiatives have emerged to tackle the challenges involved, and significant incremental progress has been made on many fronts. But a major breakthrough, leading to a standardised approach and thereby to widespread adoption, is still not in sight. One of the main problems from the technological point of view is fragmentation. The mission of {AALOA}, the {Ambient Assisted Living Open Association}, is to address this situation by bringing together the resources, tools and people involved in {Ambient Asssisted Living (AAL)} in a single forum that makes it much easier to reach conclusions on provisions needed to achieve progress. A concrete technical objective is to promote a common platform or middleware that is distributed as open source software.}, keywords = {AAL, ambient assisted living, community building, open source}, acmclass = {C.2.4 Network Operating Systems; D.4.7 Distributed systems}, issn = {2045-2357}, url = {http://www.publicservice.co.uk/article.asp?publication=Health%20and%20Social%20Care&id=560&content_name=European%20Health%20and%20Social%20Care&article=19615}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/AALOA-PublicService12.pdf}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20120515, entryby = {pot} }  @article{M01:EvAAL-ErcimNews11, author = {Stefano Chessa and Francesco Furfari and Francesco Potort\i}, title = {{EvAAL}: evaluating {AAL} systems through competitive benchmarking}, journal = {Ercim News}, editor = {Peter Kunz and Carol Peters}, publisher = {ERCIM EEIG}, year = 2011, month = oct, pages = 46, number = 84, note = {Not peer reviewed}, abstract = {Owing to the complexity of {Ambient Assisted Living (AAL)} systems and platforms, the evaluation of {AAL} solutions is a complex task that will challenge researchers for years to come. However, the analysis and comparison of proposed solutions is paramount to enable us to assess research results in this area. We have thus organized an international contest called {EvAAL}: {Evaluating AAL Systems Through Competitive Benchmarking}. Its aims are to raise interest within the research and developer communities in the multidisciplinary research fields enabling {AAL}, and to create benchmarks for the evaluation and comparison of {AAL} systems.}, keywords = {AAL, ambient assisted living, benchmark, competition, contest, localization}, acmclass = {B4.4.4 Performance Analysis and Design Aids, Verification}, issn = {0926-4981}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/EvAAL-ErcimNews11.pdf}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20111222, entryby = {pot} }  @inbook{L10:EvAAL-IPIN-History-Elsevier18, author = {Francesco Potort\i, Antonio Crivello and Filippo Palumbo}, title = {Geographical and Fingerprinting Data for Positioning and Navigation Systems}, editor = {Jordi Conesa, Antoni P\'erez-Navarro, Joaqu\'in Torres-Sospedra and Raul Montoliu}, chapter = {11 – The {EvAAL} Evaluation Framework and the {IPIN} Competitions}, publisher = {Elsevier}, year = 2018, month = sep, series = {Intelligent Data-Centric Systems}, pages = {209–224}, abstract = {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 ongoing series of IPIN competitions. The EvAAL evaluation framework defines tools and metrics usable for comparing both real-time systems and off-line methods based on recorded data. The EvAAL framework is discussed in its incarnation along the various editions of the EvAAL and IPIN competitions, together with a discussion on the performance and technologies used by the competing systems.}, keywords = {Indoor localization; Indoor navigation; Localization competition; Standard evaluation metrics; Benchmarking; Performance evaluation}, acmclass = {C.2.2 Network Protocols Applications; B.4.1 Data Communications Devices}, isbn = 9780128131893, doi = {10.1016/B978-0-12-813189-3.00011-3}, url = {https://www.sciencedirect.com/science/article/pii/B9780128131893000113}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20180912, entryby = {pot} }  @inbook{L09:LocBodyAreaNet-Elsevier14, author = {Paolo Barsocchi and Francesco Potort\i}, title = {Wearable sensors}, chapter = {6.4. Localization in wireless body area networks}, publisher = {Elsevier}, year = 2014, month = aug, series = {Academic Press}, pages = {493–516}, abstract = {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 performance of localization system, followed by an overview of technologies used for different types of sensors and general ways to fuse data generated by sensors. Since we envision a future where the presence of small devices communicating via packet radio is ubiquitous in most indoor and some outdoor environments, the rest of the chapter concentrates on methods and algorithms used in the context of wearable radios, most of which are based on the RSS (received signal strength) indicator available on packet radio devices.}, acmclass = {C.2.2 Network Protocols Applications; B.4.1 Data Communications Devices}, isbn = {978-0-12-418662-0}, url = {https://www.elsevier.com/books/wearable-sensors/unknown/978-0-12-418662-0}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20150130, entryby = {pot} }  @inbook{L08:Manifesto-Springer10, author = {Francesco Furfari and Francesco Potort\i and Stefano Chessa and M.-R. Tazari and Michael Hellenschmidt and R. Wichert and Joe Gorman and Antonio Kung}, title = {Platforms for AAL Applications}, chapter = {7. The AAL Open Association Manifesto}, publisher = {SpringerLink}, year = 2010, volume = 6446, series = {Lecture Notes in Computer Science}, pages = {190–194}, abstract = {AAL (Ambient Assisted Living) has great potential for positively influencing the lives of many people. But impact so far has been less than hoped, partly due to fragmentation of research efforts and the lack of a standardised approach for developers. To address this, we are forming the AALOA (AAL Open Association), and invite you to join in our efforts.}, keywords = {AmI; AAL; Platform; OSGi; URC; Smart Homes; Healthcare; Software Platform; Open Source Policies; Standards; reference platform; standardization; Platform; Application; Policies; Universal Remote Console (URC); Web Service Description Language (WSDL); personal user interface; pluggable user interface; OpenURC; Alliance; Platform for Accessible User Interfaces; ISO; ICT; e-Inclusion}, acmclass = {C.2.1 Wireless communication; C.2.4 Network Operating Systems; D.4.7 Distributed systems}, doi = {10.1007/978-3-642-16982-3_14}, url = {http://www.springerlink.com/content/n014603374p43k13/}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20101223, entryby = {pot} }  @inbook{L07:Brew-IGI08, author = {Paolo Barsocchi and Alan A. Bertossi and M. Cristina Pinotti and Francesco Potort\i}, editor = {Ismail Khalil Ibrahim}, title = {Handbook of Research on Mobile Multimedia}, chapter = {XXIX: Quality of service of data broadcasting algorithms on erroneous wireless channels}, publisher = {IGI Global – Information Science Reference}, year = 2008, edition = 2, month = sep, pages = {421–436}, abstract = {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 described by the Bernoulli model, in which each packet transmission has the same probability to fail and each transmission error is independent from the others. The objective is that of minimizing the average expected delay experienced by the clients. Optimal solutions can be found in polynomial time when all data items have unit lengths, while heuristics are presented when data items have non-unit lengths. Extensive simulations, performed on benchmarks whose item popularities follow Zipf distributions, show that good sub-optimal solutions are found.}, keywords = {broadcast scheduling algorithm; data allocation algorithm; average expected delay; wireless channel; channel error model; heuristics; quality of service}, isbn = {978-1-60566-046-2}, url = {http://www.igi-global.com/reference/details.asp?ID=8219}, entrydate = 20071119, entryby = {pot} }  @inbook{L06:Costglue-COST07, author = {Dragan Savi\'c and Francesco Potort\i and Francesco Furfari and Matev\v{z} Pusti\v{s}ek and Sa\v{s}o Toma\v{z}i\v{c} and Janez Be\v{s}ter}, editor = {Nejat Ince and Arnold Bragg}, title = {23. Recent advances in modeling and simulation tools for communication networks and services}, chapter = {A tool for packaging and exchanging simulation results}, note = {Proceedings of the final COST 285 symposium}, publisher = {Springer US}, year = 2007, month = nov, pages = {443–462}, abstract = {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 we have studied the needs of the telecommunication community and defined a reference model of a simulation process. According to the needs we have developed a software tool CostGlue, which represents a central repository for data produced with different types of simulation tools and acts as a converter of different output formats into different input formats. CostGlue has modular software architecture. This enables further development and contributions from any other research sphere of activity. The core of the software tool represents the application CoreGlue responsible for communicating with the database. CoreGlue represents unified interface for writing to the database and reading from it. Specific functions like import and export of data and different mathematical calculations are represented as a set of self-described modules, which are loaded as necessary. The graphic user interface is introduced as a web application for the simplicity of use and effective remote access to the application. The software package CostGlue is going to be released as free software with the possibility of further development.}, keywords = {simulation; archiver; converter; HDF}, acmclass = {E.5 Files; D.2.12 Interoperability}, isbn = {978-0-387-73907-6}, doi = {10.1007/978-0-387-73908-3_23}, url = {http://www.springerlink.com/content/xn35h8383r60h510}, entrydate = 20070329, entryby = {pot} }  @inbook{L05:TCPonSat-Springer, author = {Nedo Celandroni and Francesco Potort\i}, editor = {Giovanni Giambene}, title = {Resource management in satellite networks}, chapter = {9.3. Cross-layer interaction between {TCP} and physical layer}, note = {Not peer reviewed}, publisher = {Springer}, year = 2007, pages = {294–298}, keywords = {TCP; satellite; cross-layer}, acmclass = {C.2.3 Network Operations}, isbn = {978-0-387-36897-9}, eisbn = {978-0-387-53991-1}, url = {http://www.springer.com/east/home/generic/search/results?SGWID=5-40109-22-173670265-0}, entrydate = 20060328, entryby = {pot} }  @inbook{L04:FZC-Springer, author = {Paolo Barsocchi and Alberto Gotta and Francesco Potort\i}, editor = {Giovanni Giambene}, title = {Resource management in satellite networks}, chapter = {8.5.1. Redundant codes in hybrid networks}, note = {Not peer reviewed}, publisher = {Springer}, year = 2007, pages = {265–267}, keywords = {TCP; satellite; cross-layer}, acmclass = {C.2.3 Network Operations}, isbn = {978-0-387-36897-9}, eisbn = {978-0-387-53991-1}, url = {http://www.springer.com/east/home/generic/search/results?SGWID=5-40109-22-173670265-0}, entrydate = 20060328, entryby = {pot} }  @inbook{L03:Costglue-COST05, author = {Matev\v{z} Pusti\v{s}ek and Dragan Savi\'c and Francesco Potort\i}, editor = {Nejat Ince and Ercan Topuz}, title = {Modeling and simulation tools for emerging telecommunications networks}, chapter = {10. Packaging simulation results with {CostGlue}}, note = {Proceedings of the mid-term COST 285 symposium}, publisher = {Kluwer/Springer}, year = 2006, month = sep, pages = {209–222}, abstract = {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 converter for big quantities of simulation data to be released as free software.}, keywords = {simulation; archiver; converter; HDF}, acmclass = {E.5 Files; D.2.12 Interoperability}, isbn = {0-387-32921-8}, url = {http://www.springer.com/dal/home/math/applications?SGWID=1-10051-22-170220034-0}, entrydate = 20050726, entryby = {pot} }  @inbook{L02:COST253-Wiley02, author = {Marco Annoni and Simone Bizzarri and Erina Ferro and Laurent Franck and Ioannis Gragopoulos and Evangelos Papapetrou and Francesco Potort\i}, editor = {Yim-Fun Hu and G\'erard Maral and Erina Ferro}, title = {Service efficient network interconnection via satellite – {EU} {COST} {Action} 253}, note = {Not peer reviewed}, chapter = {5. GaliLEO: a simulation tool for traffic on LEO satellite constellations - presentation of the architecture}, publisher = {Wiley}, year = 2002, month = jan, abstract = {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 is not always possible to find the right amount of traffic, and the most appropriate traffic pattern and data aggregation that will put the system under the maximum amount of stress so that its limits can be validated. When satellite constellations are involved, rather than single satellites, these problems are enormously exacerbated, to the point that in all but very particular cases it is practically impossible for the researcher to do tests on satellite constellations. It is therefore necessary to use some kind of simulation tool. The array of required features for the tool is very broad. The basic feature is that of making it possible to describe the constellation topology, and the position of earth terminals. Satellite may have different capabilities, in term of number and characteristics of intersatellite links, spot topology and behaviour, and on-board processing abilities. Many types of routing algorithms are under study, some of which allow for dynamic rerouting based on nodes' perceived congestion or on quality of service requests. Also, it should be possible to analyse channel allocation algorithms for the up-down links, including frequency reuse algorithms. The traffic generation choice should be broad and easily extensible, allowing for both fine control on single connections and generation of background traffic for loading the satellite network. Finally, a rich set of statistic collection and analysis tools should be available.}, keywords = {COST; LEO; satellite; simulation}, url = {http://www.wiley.com/cda/product/0,,0471486698%7Cdesc%7C2823,00.html}, entrydate = 20030121, entryby = {pot} }  @inbook{L01:COST256-Kluwer01, author = {Laurent Franck and Francesco Potort\i}, editor = {A. Nejat Ince}, title = {Modeling and simulation environment for satellite and terrestrial communication networks}, note = {Proceedings of the European COST telecommunications symposium – COST Action 256 – The Kluwer International series in Engineering and Computer Science: volume 645}, chapter = {11. GaliLEO: a simulation tool for LEO satellite constellations}, publisher = {Kluwer}, year = 2001, month = oct, abstract = {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 performance of satellite-based communication networks from as many as possible points of view. Typical applications include simulation of access techniques, routing policies, fault management. The simulator is written in Java, and it makes use of dynamic loading to easily integrate user-written modules. A draft manual is available, and a preliminary version of the program will be published by the end of 2000.}, keywords = {COST; galileo; satellite; simulation}, isbn = {0-7923-7547-5}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/GaliLEO-COST256.pdf}, url = {http://www.wkap.nl/prod/b/0-7923-7547-5}, entrydate = 20030606, entryby = {pot} }  @inproceedings{C49:4anchors-Ubicomp18, author = {Francesco Potort\i and Pietro Cassar\a and Filippo Palumbo}, title = {Robust device-free localisation with few anchors}, booktitle = {Proceedings of the International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp)}, pages = {1184–1189}, year = 2018, note = {Sensors & Behaviour workshop}, month = oct, days = {8–12}, location = {Singapore (SG)}, abstract = {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 for an area the size of a single-family house, with an accuracy around one meter and a high sensitivity to even the slightest movement. The literature about device-free localisation systems typically concentrates on improving sensitivity, accuracy and discriminating power, without worrying too much about the number of involved radio devices. In this paper, for the first time, we demonstrate that device-free localisation can work with reduced performance with as low as four anchors in an environment composed by two wide rooms. Being able to use so few anchors opens the possibility of several use cases where installing tens of devices is not desirable.}, keywords = {computerised tomography; indoor radio; position measurement; remote sensing; performance evaluation; ZigBee}, acmclass = {H.3.4 Systems and Software–Performance evaluation}, isbn = {978-1-4503-5966-5}, doi = {10.1145/3267305.3276798}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/4anchors-Ubicomp18.pdf}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20180912, entryby = {pot} }  @inproceedings{C48:ISO-IEC-18305-IPIN18, author = {Francesco Potort\i and Antonino Crivello and Paolo Barsocchi and Filippo Palumbo}, title = {Evaluation of indoor localisation systems: comments on the {ISO/IEC}\,18305 standard}, booktitle = {proceedings of the International Conference on Indoor Positioning and Indoor Navigation (IPIN)}, year = 2018, note = {Second best paper award}, month = sep, days = {24–27}, location = {Nantes (FR)}, abstract = {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 methodologies, common evaluation criteria, standardised methodologies useful to developers, testers, and end users is an open challenge. The need for common benchmarks has been tackled by some initiatives in recent years: EvAAL, EVARILOS, the Microsoft competition and the IPIN competition. The first formal attempt at defining a standard methodology to evaluate indoor localisation systems is the ISO/IEC\,18305:2016 International Standard, which defines a complete framework for performing Test&Evaluation of localisation and tracking systems. This work is a first critical reading of the standard, intended to be a key contribution to the activities of the International Standards Committee of IPIN.}, keywords = {Performance evaluation; Indoor localisation systems; ISO/IEC\,18305:2016; IPIN-ISC}, acmclass = {General and reference–Computing standards, RFCs and guidelines}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/ISO-IEC-18305-IPIN18.pdf}, url = {https://ieeexplore.ieee.org/document/8533710}, isbn = {978-1-5386-5635-8}, doi = {10.1109/IPIN.2018.8533710}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20180912, entryby = {pot} }  @inproceedings{C47:Prettyindoor-AIAALIT17, author = {Agostini, Michele and Crivello, Antonino and Palumbo, Filippo and Potortì, Francesco}, title = {An open-source framework for smartphone-based indoor localization}, booktitle = {proceedings of the International Conference of the Italian Association for Artificial Intelligence}, note = {Third Italian Workshop on Artificial Intelligence for Ambient Assisted Living}, pages = {74–86}, year = 2017, month = nov, days = {16–17}, abstract = {In the Ambient Assisted Living (AAL) scenario, indoor localization represents one of the main pillars for the development of context-aware applications. In this context, comparing and testing indoor positioning system is a hot topic in the indoor localization research community. In fact, after several years algorithms and methods have been developed and matured, no general frameworks exist yet to reliably compare them. The scarcity of common datasets for off-line test of emerging indoor positioning systems, together with the lack of available frameworks for real-time comparison and evaluation of indoor localization solutions, is one of the main barriers to their standardization. The lack of a common usable software framework for implementing and testing new algorithms, on a fair basis, is an additional barrier. In this work, we address this research challenge by proposing a free software framework enabling the development of indoor localization applications on the Android platform. It is composed of two applications: \textit{PrettyIndoor} is a positioning app, \textit{FingerFood} is a fingerprint-building app. We show that the framework's modular architecture can be exploited to easily develop many data fusion strategies, in order to easily compare and improve indoor positioning systems.}, keywords = {indoor localization; software framework; software architecture; particle filter; kalman filter; free software}, acmclass = {C.2.2 Network Protocols Applications; B.4.1 Data Communications Devices}, doi = {–}, email = {mymail}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Prettyindoor-AIAALIT17.pdf}, entrydate = 20171109, entryby = {pot} }  @inproceedings{C46:Wifi-probes-IPIN16, author = {Francesco Potort\i and Antonino Crivello and Michele Girolami}, title = {Wi-Fi Probes as Digital Crumbs for Crowd Localisation}, booktitle = {proceedings of the International Conference on Indoor Positioning and Indoor Navigation (IPIN)}, year = 2016, month = oct, days = {4–7}, location = {Madrid (ES)}, abstract = {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, especially when they are not associated to a network. They periodically perform active network scanning by issuing probe requests, which are detected by networked sniffing devices produced by Cloud4Wi®. We experimentally investigate the opportunities offered by passive gathering of Wi-Fi probes for purposes of crowd positioning in areas of interest. Our preliminary experimental setting convincingly shows that a small number of sniffing devices may be enough for analysing crowd movements in indoor areas.}, keywords = {Passive indoor localization; crowd sensing; Wi-Fi probe eavesdropping; Wi-Fi fingerprinting}, acmclass = {C.2.2 Network Protocols Applications; B.4.1 Data Communications Devices}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Wifi-probes-IPIN16.pdf}, url = {http://ieeexplore.ieee.org/document/7743599}, doi = {10.1109/IPIN.2016.7743599}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20160720, entryby = {pot} }  @inproceedings{C45:EvAAL-competition-IPIN15, author = {Francesco Potort\i and Paolo Barsocchi and Michele Girolami and Joaquı́n Torres-Sospedra and Raúl Montoliu}, title = {Evaluating Indoor Localization Solutions in Large Environments Through Competitive Benchmarking: The {EvAAL-ETRI} Competition}, booktitle = {proceedings of the International Conference on Indoor Positioning and Indoor Navigation (IPIN)}, year = 2015, month = oct, days = {13–16}, location = {Banff, AB (CA)}, abstract = {The increasing demand for services and higher comfort levels inside buildings, together with the rise in time spent indoor, ensure an upward trend in indoor localization demand for the future. Evaluation of indoor localization systems is particularly challenging due to the complexity of such systems and to the variety of solutions adopted and services offered. {EvAAL} is an international competition aimed at evaluating and assessing indoor localization systems. The fifth edition of {EvAAL} promotes competitions on indoor localization in large environments. This paper describes its technical aspects, the competing systems and the results. }, keywords = {device-free localization; indoor localization; RSS localization}, acmclass = {C.2.2 Network Protocols Applications; B.4.1 Data Communications Devices}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/EvAAL-competition-IPIN15.pdf}, url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7346970}, doi = {10.1109/IPIN.2015.7346970}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20160120, entryby = {pot} }  @inproceedings{C44:DFL-comparison-IPIN15, author = {Pietro Cassar\a and Francesco Potort\i and Paolo Barsocchi and Michele Girolami}, title = {Choosing an {RSS} Device-Free Localization algorithm for Ambient Assisted Living}, booktitle = {proceedings of the International Conference on Indoor Positioning and Indoor Navigation (IPIN)}, year = 2015, month = oct, days = {13–16}, location = {Banff, AB (CA)}, abstract = {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, called anchors. In this paper we select and test the main device-free localization solutions and experimentally compare their performance using a smaller number of anchors than commonly found in the literature. We illustrate the procedure used to validate our comparing procedure and we give suggestions on usability in the application scenarios typical of AAL.}, note = {Code available at \url{http://wnet.isti.cnr.it/software/spin}}, keywords = {device-free localization; indoor localization; RSS localization}, acmclass = {C.2.2 Network Protocols Applications; B.4.1 Data Communications Devices}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/DFL-comparison-IPIN15.pdf}, url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7346788}, doi = {10.1109/IPIN.2015.7346788}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20150528, entryby = {pot} }  @inproceedings{C43:Multichannel-IPIN15, author = {Pietro Cassar\a and Francesco Potort\i and Paolo Barsocchi and Michele Girolami and Paolo Nepa}, title = {Lessons Learned on Device Free Localization with Single and Multi Channel Mode}, booktitle = {proceedings of the International Conference on Indoor Positioning and Indoor Navigation (IPIN)}, year = 2015, month = oct, days = {13–16}, location = {Banff, AB (CA)}, abstract = {In this paper we concentrate on device-free RSS-based indoor localization methods, which have been the subject of intensive studies in the last few years. Specifically, the purpose of this paper is to assess the performance improvements of a Variance-based Radio Tomographic Imaging (VRTI) technique, when scanning various radio channels. We compare the performance of such technique compared with a VRTI configured with only single channel, the latter being the minimum introduced interference'' option. Moreover, in this paper we discuss in which application scenarios the multi-channel scanning technique is usable and appropriate. We describe how we configure the measurements campaigns to gather RSS values as well two indicative performance metrics, namely the mean square error and percentiles of the error distribution.}, keywords = {device-free localization; indoor localization; RSS localization}, acmclass = {C.2.2 Network Protocols Applications; B.4.1 Data Communications Devices}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Multichannel-IPIN15.pdf}, url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7346789}, doi = {10.1109/IPIN.2015.7346789}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20150528, entryby = {pot} }  @inproceedings{C42:Enerduino-Sensors14, author = {Paolo Barsocchi and Erina Ferro and Filippo Palumbo and Francesco Potort\i}, title = {Smart meter led probe for real-time appliance load monitoring}, booktitle = {proceedings of IEEE Sensors}, pages = {1451–1454}, year = 2014, month = nov, days = {2–5}, editor = {IEEE}, address = {Piscataway, USA}, abstract = {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 real-time with a cheap, easy-to-install device based on Arduino to monitor the usage of domestic appliances and thus the activities of persons inside their home. The device is presented, complete with free software and hardware, and a proof-of-concept web-based user interface is depicted that is able to discriminate very simple activities.}, keywords = {Arduino; energy meter; NIALM; AIDL; appliance usage detection}, days = {3–5}, acmclass = {Hardware~Platform power issues; Computer systems organization~Sensors and actuators; Applied computing~Health informatics }, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Enerduino-Sensors14.pdf}, url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6985287}, isbn = {978-1-4799-0161-6}, doi = {10.1109/ICSENS.2014.6985287}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20141128, entryby = {pot} }  @unpublished{C41:Multichannel-IPIN13, author = {Pietro Cassar\a and Francesco Potort\i and Paolo Barsocchi and Paolo Nepa}, title = {Single-channel versus multi-channel scanning in device-free indoor radio localization}, booktitle = {proceedings of the International Conference on Indoor Positioning and Indoor Navigation (IPIN)}, year = 2013, month = oct, note = {Oral presentation, proceedings not published}, days = {28–31}, keywords = {device-free localization; indoor localization; RSS localization}, acmclass = {C.2.2 Network Protocols Applications; B.4.1 Data Communications Devices}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20131122, entryby = {pot} }  @inproceedings{C40:AALOA-AALForum12, author = {Sten Hanke and Francesco Furfari and Juan Pablo L\'azaro Ramos and Francesco Potort\i}, title = {The {AALOA} exploitation model for {AAL} project results}, booktitle = {proceedings of AAL Forum}, pages = {335–339}, year = 2013, editor = {Erika Pohjanen}, publisher = {New Tools for Health}, address = {Norrk{\"{o}}ping (SE)}, month = sep, days = {24–26}, abstract = {AALOA, the Ambient Assisted Living Open source Association, was born to create an environment to foster initiatives linked to AAL. AALOA offers an environment where people and organizations can start an AAL project. Most projects are expected to be software projects, to be released using a Free / Libre / Opens Source software licence, but other types of activities, like research, conference organization, standardization and lobbying are envisioned as well. This paper illustrates the idea of the Ambient Assisted Living Open Association, the actions initiated by AALOA and those planned for the future. The main focus is on the exploitation possibilities which AALOA provides to the outcome of several European and non-European projects. A collaboration here would be a win-win situation. On one side, AALOA has already appropriate prominence and is linked to European strategies which can help to group people and associations around different project results and to position them in the right way and manner. On the other side AALOA is depending on the community and on the projects it hosts. To demonstrate this ambition and to give a demonstration for other European projects, the paper presents the identified exploitable results of the universAAL FP7 project and their planned incubation in AALOA. }, keywords = {AAL; open source; community building}, acmclass = {C.2.4 Network Operating Systems; D.4.7 Distributed systems}, url = {http://www.aal-europe.eu/forum-proceedings/}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/AALOA-AALForum13.pdf}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20131122, entryby = {pot} }  @incollection{C39:Raggi-IWAWPLC12, author = {Paolo Barsocchi and Francesco Potort\i and Paolo Nepa}, title = {Device-free indoor localization for {AAL} applications}, booktitle = {proceedings of the International Workshop on Advances in Wireless Physical Layer Communications for Emerging Healthcare Applications (IWAWPLC)}, publisher = {Springer}, year = 2012, editor = {Balwant Godara and Konstantina S. Nikita}, series = {Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering}, volume = 61, pages = {361–368}, address = {Paris (FR)}, month = nov, note = {In: Wireless Mobile Communication and Healthcare}, abstract = {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 not requiring the user to wear anything, and is able to trade complexity for accuracy by simply changing the number of deployed devices. The presentation is validated by an indoor experimental study.}, days = {21–23}, keywords = {RSS-based localization; AAL; tracking}, acmclass = {C.2.2 Network Protocols Applications; B.4.1 Data Communications Devices}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Raggi-IWAWPLC12.pdf}, doi = {10.1007/978-3-642-37893-5_40}, isbn = {978-3-642-37892-8}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20121219, entryby = {pot} }  @incollection{C38:EvAAL-CCIS12, author = {Paolo Barsocchi and Francesco Potort\i and Francesco Furfari and Alejandro M. Medrano Gil}, title = {Comparing {AAL} indoor localization systems - indoor localization and tracking}, booktitle = {Evaluating {AAL} systems through competitive benchmarking}, pages = {1–13}, editor = {Stefano Chessa and Stefan Knauth}, series = {Communications in computer and information science}, volume = 309, type = {post-proceedings}, address = {Lecce (IT)}, organization = {{EvAAL} international competition}, publisher = {Springer}, abstract = {{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 technical aspects of the first edition of {EvAAL} and draws a roadmap for the future editions.}, year = 2012, keywords = {AAL; localization; tracking}, acmclass = {B4.4.4 Performance Analysis and Design Aids, Verification}, doi = {10.1007/978-3-642-33533-4}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/EvAAL-CCIS12.pdf}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20120905, entryby = {pot} }  @inproceedings{C37:EvAAL-AALForum11, author = {Stefano Chessa and Francesco Furfari and Francesco Potort\i and Paolo Barsocchi and Mohammad-Reza Tazari and Reiner Wichert}, title = {Evaluating {AAL} systems through competitive benchmarking ({EvAAL}) (Technical aspects of the first competition)}, booktitle = {proceedings of AAL Forum}, note = {EvAAL workshop}, pages = {102–107}, year = 2011, editor = {Ilse Bierhoff and Henk Herman Nap and Wil Rijnen and Reiner Wichert}, address = {Lecce (IT)}, month = sep, days = 26, abstract = {{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 technical aspects of the first edition of {EvAAL} and draws a roadmap for the future editions.}, keywords = {AAL; localization; tracking}, acmclass = {B4.4.4 Performance Analysis and Design Aids, Verification}, url = {http://www.aal-europe.eu/forum-proceedings/}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/EvAAL-AALForum11.pdf}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20131122, entryby = {pot} }  @inproceedings{C36:Context-ISCC11, author = {Paolo Barsocchi and Stefano Chessa and Erina Ferro and Francesco Furfari and Francesco Potort\i}, title = {Context driven enhancement of {RSS}-based localization systems}, booktitle = {proceedings of the IEEE Symposium on Computers & Communications (ISCC)}, pages = {463–468}, year = 2011, address = {Kerkyra (GR)}, month = jun, abstract = {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 (Receive Signal Strength) has not a significant impact on local power consumption, sensor size, and cost. In front of these interesting characteristics, the performance of the RSS approach is worst with respect to some more invasive ad hoc hardware range-based solutions (such as Angle of Arrival, Time of Arrival etc.). In this paper we propose a localization method that leveraging the context information, such as the knowledge of being in a given room, increases the localization accuracy of RSS-based methods. Performance evaluation is done via real measurements in an office environment composed of three adjacent rooms.}, days = {28–1}, keywords = {zigbee; context information; indoor localization; RSSI localization}, acmclass = {C.2.2 Network Protocols Applications; B.4.1 Data Communications Devices}, doi = {10.1109/ISCC.2011.5983880}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20110517, entryby = {pot} }  @inproceedings{C35:Context-IPIN10, author = {Paolo Barsocchi and Stefano Chessa and Francesco Furfari and Francesco Potort\i}, title = {Using context information to improve indoor localisation}, booktitle = {Abstracts of the International Conference on Indoor Positioning and Indoor Navigation (IPIN)}, pages = {295–296}, year = 2010, editor = {Rainer Mautz and Melanie Kunz and Hilmar Ingensand}, address = {Campus Science City, ETH Zurich (CH)}, month = sep, note = {Not peer reviewed, oral presentation}, abstract = {RSSI-based indoor localisation systems are widely accepted in the literature as one of the least invasive localisation 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 RSSI has not a significant impact on local power consumption, sensor size, and cost. In front of these interesting characteristics, the performance of the RSSI approach is worst with respect to some more invasive ad hoc hardware range-based solutions (such as Angle of Arrival, Time of Arrival etc...). Context information, such as knowledge of being in a given room, can increase the localisation accuracy of RSSI-based methods. In this paper we propose a localisation method that leverages context information. Performance evaluation is done via real measurements in an office environment composed of three adjacent rooms.}, days = {15–17}, keywords = {zigbee; context; indoor localization; RSSI localization}, acmclass = {C.2.2 Network Protocols Applications}, pdf = {http://www.geometh.ethz.ch/ipin/IPIN2010_Abstract_Volume.pdf}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20101223, entryby = {pot} }  @inproceedings{C34:LimitsRSSI-IPIN10, author = {Paolo Barsocchi and Francesco Furfari and Paolo Nepa and Francesco Potort\i}, title = {RSSI localisation with sensors placed on the user}, booktitle = {proceedings of the International Conference on Indoor Positioning and Indoor Navigation (IPIN)}, pages = {194–199}, year = 2010, editor = {Rainer Mautz and Melanie Kunz and Hilmar Ingensand}, address = {Campus Science City, ETH Zurich (CH)}, month = sep, abstract = {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 hardware, the mobiles estimate the position and orientation of the user. Many methods have been proposed to tackle this problem. In this paper we describe a purely theoretical procedure that aims to evaluate the maximum attainable performance of any real methods using RSSI for localisation purpose. Our analysis we present is based on a fine grid of RSSI values in a room, which are computed via ray-tracing, and a maximum-likelihood approach to localisation. Here we illustrate the performance gains of using multiple mobiles versus using a single one and and the attainable performance of user orientation estimation.}, days = {15–17}, keywords = {zigbee; accuracy limits; indoor localization; RSSI localization}, acmclass = {C.2.2 Network Protocols Applications}, isbn = {978-1-4244-5864-6}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/LimitsRSSI-IPIN10.pdf}, doi = {10.1109/IPIN.2010.5647868}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20101223, entryby = {pot} }  @inproceedings{C33:Posture-APS10, author = {Anda Guraliuc and Andrea A. Serra and Paolo Nepa and Giuliano Manara and Francesco Potort\i}, title = {Detection and classification of human arm movements for physical rehabilitation}, booktitle = {proceedings of the Antennas and Propagation Society International Symposium}, pages = {1–4}, year = 2010, address = {Toronto, ON (CA)}, month = jul, abstract = {In the latest years, the detection of body posture and activity received a significant interest in the field of the physical rehabilitation aimed at providing advanced medical therapies to patients who have suffered a stroke, joint replacements/reconstructions, amputation, or some motor function disability resulting from Parkinson’s disease. Rehabilitation is a dynamic process and the restoration of patients’ functional capability to normal requires every day functional activities that need to be monitored and controlled by specialized medical operators. An effective approach is represented by motion capturing systems where some video cameras follow the movements of a number of markers placed on the human body to reconstruct its activity. However, such systems are complex, expensive and require a large number of constitutive elements (cameras and markers).}, days = {11–17}, keywords = {posture identification; RSSI; radio frequency; body sensors}, acmclass = {B.4.1 Data Communications Devices; G.3 PROBABILITY AND STATISTICS}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Posture-APS10.pdf}, doi = {10.1109/APS.2010.5561051}, email = {mailto:Potorti@isti.cnr.it}, entrydate = 20101223, entryby = {pot} }  @inproceedings{C32:Smartmode-IWSSC09, author = {Alberto Gotta and Erina Ferro and Francesco Potort\i}, title = {Quality of experience in satellite video streaming transmissions in urban vehicular environment}, booktitle = {proceedings of the International Workshop on Satellite and Space Communications (IWSSC)}, pages = {18–22}, year = 2009, address = {Siena (IT)}, month = sep, days = {10–11}, publisher = {IEEE}, abstract = {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 are predictable, as in the presence of known routes traced by means of a GPS navigator, it may be advisable to alert the transmitter in advance, in order to counteract the incoming outage interval. We refer to this technique as Smart Mode. In the following we will detail how Smart Mode takes advantage of FEC and interleaving techniques, in order to improve the Quality of Experience and to reduce the waste of bandwidth in satellite multimedia streaming.}, keywords = {video streaming; satellite; mobile; FEC; interleaver}, acmclass = {C.2.1 Network Architecture and Design; C.2.3 Network Operations; C.2.2 Network Protocols Applications; H.4.3 Communications Applications}, doi = {–}, email = {mailto:Potorti@isti.cnr.it}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Smartmode-IWSSC09.pdf}, entrydate = 20090814, entryby = {pot} }  @inproceedings{C31:Tabatinga-IWSSC09, author = {David Pradas and Paolo Barsocchi and Francesco Potort\i and Lei Jiang and M.A. V\'azquez Castro}, title = {Satellite {PHY}-layer selector design for video applications in tropical areas}, booktitle = {proceedings of the International Workshop on Satellite and Space Communications (IWSSC)}, pages = {407–411}, year = 2009, address = {Siena (IT)}, month = sep, days = {10–11}, publisher = {IEEE}, abstract = { 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, especially because of the characteristics of tropical deep fading events. In order to avoid QoS reduction, we focus on the DVB PHY-layer {\em shifted threshold}, which we study not only for different Amazon areas and different rain conditions, but also for different reaction delays. The performance of the PHY-layer {\em selector} is evaluated in terms of video quality (PSNR), packet error rate and bandwidth efficiency.}, keywords = {atmospheric fading; tropical area; video streaming; satellite; packet-level FEC}, acmclass = {C.2.1 Network Architecture and Design; C.2.3 Network Operations; C.2.2 Network Protocols Applications; H.4.3 Communications Applications}, doi = {–}, email = {mailto:Potorti@isti.cnr.it}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Tabatinga-IWSSC09.pdf}, entrydate = 20090814, entryby = {pot} }  @inproceedings{C30:LimitsRSSI-APS09, author = {Francesco Potort\i and Alessandro Corucci and Paolo Nepa and Francesco Furfari and Paolo Barsocchi and Alice Buffi }, title = {Accuracy limits of in-room localisation using RSSI}, booktitle = {proceedings of the Antennas and Propagation Society International Symposium}, year = 2009, month = jun, address = {Charleston, SC (US)}, abstract = {Indoor localisation using inexpensive, non-dedicated wireless devices has spun great attention in the last years. We witness the ubiquitous presence of Wi-Fi access points in offices and homes, soon followed by the increasing spread of low-power, low-cost wireless nodes using the Bluetooth and, in perspective, ZigBee technologies. The presence of a potentially high number of wireless transmitters in indoor spaces has pushed researchers to investigate whether their built-in received signal strength indicator (RSSI) could be exploited to gain information on the relative position of a receiver with respect to a number of transmitters and, by knowing in advance the position of those transmitters, to pinpoint the receiver's position. Even though RSSI meters are not built to this end, but rather to give information to the higher communication protocol layers about the status of the communication link, their usage is highly attractive, because the information they give is obtained almost for free''. As a consequence, many studies exist which, analytically, through simulations or through real measurements, analyse how a receiver ({\em mobile}) can best use RSSI relative to multiple wireless transmitters ({\em anchors}) to compute its position. In this paper we use detailed ray-tracing simulation to investigate the ultimate performance of indoor, single-room localisation using RSSI measurements in a specific case, and we comment on the results. This study does not lend itself to practical implementation of a localisation method, but rather provides insight into the limits of methods based on RSSI.}, keywords = {indoor localisation; RSSI; Zigbee; sensors}, acmclass = {B.4.1 Data Communications Devices; G.3 PROBABILITY AND STATISTICS}, doi = {10.1109/APS.2009.5172087}, email = {mailto:Potorti@isti.cnr.it}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/LimitsRSSI-APS09.pdf}, entrydate = 20090223, entryby = {pot} }  @inproceedings{C29:PosturePathLoss-APS09, author = {Anda Guraliuc and Andrea A. Serra and Paolo Nepa and Giuliano Manara and Francesco Potort\i and Paolo Barsocchi}, title = {Body posture/activity detection: path loss characterization for {2.4~GHz} on-body wireless sensors}, booktitle = {proceedings of the Antennas and Propagation Society International Symposium}, year = 2009, month = jun, address = {Charleston, SC (US)}, abstract = {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 constraint with respect to wired connections. A further application of the above on-body WSNs could be in the framework of the human body posture and activity detection. Recognizing people’s activities is a key issue in Assisted Living (AL) applications, where it can be required to monitor and detect abnormalities for elderly care, or rate how a person performs routine activities. As an example, in the medical field the patient recovery and rehabilitation can be remotely monitored, controlled and recorded without the presence of a technician. Likewise, in military applications the Soldier Assist System (SAS) that provides recognition of soldier activities can be improved by body activity detection networks. In this context the authors are involved in a research activity aimed at developing algorithms for body posture/activity classification, which are based on RSS (Received Signal Strength) exploiting. Indeed, the RSS indicator is already available in most of low cost transceiver modules designed for WSNs (Smart Dust or Motes). If only a rough classification of body posture/activity is required, additional devices, as for example gyroscopes or accelerometers, could be avoided. The development of the system architecture (number of transceivers and their best placement on the human body) requires accurate path loss models to characterize radio links between a set of transceivers placed on the human body, for a number of body postures and movements. Therefore, as a first step of the above mentioned algorithm development activity, on- body path loss properties are being studied. Both numerical and experimental results will be presented in this paper. The analysis of the path loss as a function of the distance between two on-body antennas is performed at 2.4 GHz and results are shown for some radio links.}, keywords = {posture identification; RSSI; radio frequency; body sensors}, acmclass = {B.4.1 Data Communications Devices; G.3 PROBABILITY AND STATISTICS}, doi = {10.1109/APS.2009.5171661}, email = {mailto:Potorti@isti.cnr.it}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/PosturePathLoss-APS09.pdf}, entrydate = 20090223, entryby = {pot} }  @inproceedings{C28:Tabatinga-VTC09, author = {David Pradas Fernández and Lei Jiang and Maria Angeles V\'azquez Castro and Paolo Barsocchi and Francesco Potort\i}, title = {Cost-efficient design of hybrid network for video transmission in tropical areas}, booktitle = {proceedings of the IEEE Vehicular Technology Conference (VTC)- Spring}, year = 2009, month = apr, days = {26–29}, address = {Barcelona (ES)}, abstract = {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+WiFi networks. In this scenario the satellite channel is affected by deep rain events that do not allow ACM modes to protect data. Moreover, the delay in the ACM reaction to fade changes can affect the quality of the video transmission. In order to avoid the QoS reduction, we focus on different Fading Mitigation Techniques (FMT), designing a multi-layer scheme protection, using LL-FEC and AL-FEC in higher layers, and optimizing the intervention threshold and super-frame length in the physical layer.}, keywords = {DVB-S2; WiFi; LL-FEC; AL-FEC; Hybrid network; Tropical; video streaming}, acmclass = {C.2 Computer-Communication Networks}, doi = {10.1109/VETECS.2009.5073475}, email = {mailto:Potorti@isti.cnr.it}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Tabatinga-VTC09.pdf}, entrydate = 20090123, entryby = {pot} }  @inproceedings{C27:Costglue-Mipro08, author = {S\'ebastien Rumley and Dragan Savi\'c and Francesco Potort\i and Sa\v{s}o Toma\v{z}i\v{c} and Christian Gaumier}, title = {Practical approaches for software components integration in telecommunications}, booktitle = {International Convention MIPRO}, volume = 2, pages = {135–139}, year = 2008, month = may, days = {26–30}, address = {Opatija (HR)}, organization = {MIPRO Croatian Society, IEEE Croatia Section, University of Zagreb and University of Rijeka}, abstract = {In network engineering as in other areas, sophisticated software tools have been conceived to handle models of increasing complexity. These tools theoretically support a great number of input cases. However, in practice, they are confronted to a limited set of inputs, since too large efforts are required to configure each new input case. Similarly, only a few quantitative metrics are extracted from tool results, whereas the output files could be analyzed in many different ways. The potential of a given tool could thus be decoupled if these preprocessing and post-processing tasks would be wisely automated. In this paper, we focus on these preprocessing and postprocessing operations, and propose a generic execution environment which automates them. This environment permits in particular to assess the influence of various parameters on the final results, and to perform generalized what-if analysis.}, keywords = {simulation support systems}, acmclass = {E.5 Files; D.2.12 Interoperability}, isbn = {978-953-233-037-3}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Costglue-Mipro08.pdf}, entrydate = 20090218, entryby = {pot} }  @inproceedings{C26:Costglue-Eurosim07, author = {Dragan Savi\'c and Francesco Potort\i and Francesco Furfari and Janez Be\v{s}ter and Sa\v{s}o Toma\v{z}i\v{c} and Matev\v{z} Pusti\v{s}ek}, title = {Storing and exchanging simulation results in telecommunications}, booktitle = {proceedings of the EUROSIM congress on Modelling and Simulation}, volume = 2, pages = {1–7}, year = 2007, address = {Ljubljana (SI)}, month = sep, days = {9-13}, editor = {B. Zupan\v{c}i\v{c}, R. Karba, S. Bla\v{z}i\v{c}}, organization = {SLOSIM, Slovene Society for Simulation and Modelling}, publisher = {ARGESIM – ARGE Simulation News}, abstract = {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 architecture of a working prototype – CostGlue – to be used as a general-purpose archiver and converter for large quantities of simulation data. The software architecture of the CostGlue tool is modular therefore allowing further development and contributions from other research sphere of activity. The core of the tool – CoreGlue – is responsible for communicating with the database. It acts as a unified interface for writing to the database and reading from it. Specific functions like import and export of data and different mathematical calculations are represented as a set of self-described modules, which are loaded as necessary. The graphic user interface is introduced as a web application for the simplicity of use and effective remote access to the application. The software package CostGlue is going to be released as free software with the possibility of further development.}, keywords = {simulation; measurements; data; archiving; HDF}, acmclass = {E.5 Files; D.2.12 Interoperability}, isbn = {978-3-901608-32-2}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Costglue-Eurosim07.pdf}, entrydate = 20070530, entryby = {pot} }  @inproceedings{C25:Brew-NATO06, author = {Paolo Barsocchi and Alan Bertossi and Maria Cristina Pinotti and Francesco Potort\i}, title = {Data broadcasting algorithms on error-prone wireless channels}, note = {Not peer reviewed}, booktitle = {proceedings of the International Workshop on Information Security in Wireless Networks}, location = {Suceava (RO)}, year = 2006, month = sep, days = {4–8}, publisher = {IOS Press}, abstract = {Broadcasting is an efficient and scalable way of transmitting data 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 minimizing the average expected delay experienced by the clients. Two different channel error models are considered: the Bernoulli model and the simplified Gilbert-Elliot one. In the former model, each packet transmission has the same probability to fail and each transmission error is independent from the others. In the latter one, bursts of erroneous or error-free packet transmissions due to wireless fading channels are modeled. For both channel error models, optimal solutions can be found in polynomial time when all data items have unit lengths, while heuristics are presented when data items have non-unit lengths. Extensive simulations, performed on benchmarks whose item popularities follow Zipf distributions, show that good sub-optimal solutions are found.}, keywords = {wireless communication; data broadcasting; multiple channels; flat scheduling; average expected delay; channel transmission errors; Bernoulli model; Gilbert-Elliot model; heuristics}, acmclass = {C.2 Computer-Communication Network; F.2 Analysis of Algorithms and Problem Complexity}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Brew-ISWIN07.pdf}, entrydate = 20070305, entryby = {pot} }  @inproceedings{C24:Rural-model-Winmee07, author = {Paolo Barsocchi and Gabriele Oligeri and Francesco Potort\i}, title = {Frame error model in rural {Wi-Fi} networks}, booktitle = {proceedings of the International Symposium on Modeling and Optimization (Wiopt)}, pages = {41–46}, year = 2007, address = {Limassol (CY)}, month = apr, publisher = {IEEE}, note = {WiNMee/WiTMeMo workshop}, abstract = {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 relating transmission distance and packet loss on a Wi-Fi network in rural areas and propose a model that relates distance with packet loss probability. We show that a simple double regression propagation model like the one used in the ns-2 simulator can miss important transmission impairments that are apparent even at short transmitter-receiver distances. Measurements also show that packet loss at the frame level is a Bernoullian process for time spans of few seconds. We relate the packet loss probability to the received signal level using standard models for additive white Gaussian noise channels. The resulting model is much more similar to the measured channels than the simple models where all packets are received when the distance is below a given threshold and all are lost when the threshold is exceeded.}, days = 20, keywords = {ns2; model; AWGN; FER; frame error rate}, acmclass = {C.2 Computer-Communication Networks}, isbn = {1-4244-0961-6}, doi = {10.1109/WIOPT.2007.4480105}, ps = {http://fly.isti.cnr.it/pub/papers/ps/Rural-model-Winmee07.ps.gz}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Rural-model-Winmee07.pdf}, entrydate = 20070228, entryby = {pot} }  @inproceedings{C23:Tdma-dama-WNS206, author = {Alberto Gotta and Raffaello Secchi and Francesco Potort\i}, title = {Simulating dynamic bandwidth allocation on satellite links}, booktitle = {proceedings of the International Conference on Performance Evaluation Methodologies and Tools (Valuetools)}, pages = 8, year = 2006, address = {Pisa (IT)}, month = oct, publisher = {ACM}, note = {WNS2 workshop}, abstract = {In the last years, DVB-RCS has emerged as a flexible technology offering broadband Internet access to a large community of users at a relatively low cost. At the same time, the spreading of networked multimedia applications has highlighted the need to investigate mechanisms that guarantee a certain level of Quality of Service (QoS) to the end users. In particular, the DVB-RCS standard specifies different capacity request categories to support QoS at the link layer. We describe {\em Tdma-bod}, an ns-2 improvement that implements generic bandwidth-on-demand allocation in TDMA satellite systems; the patch is available as free software. This simulator has been validated through experimental tests performed on the Skyplex satellite system. Specifically, we run CBR UDP flows to measure the characteristics of the satellite link in terms of throughput and delay and to verify that the simulative model output matches the experimental dynamic throughput and one-way delay behaviour. The simulations and experiments show that bandwidth-on-demand allocation mechanisms may cause large delays when sudden variations in the incoming traffic rate occur, a behaviour typical of multimedia flows.}, days = 10, keywords = {ns2; TDMA; BoD; DAMA}, acmclass = {C.2.1 Network Architecture and Design}, isbn = {1-59593-508-8/06/10...$$5.00},
doi = {10.1145/1190455.1190462},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Tdma-dama-WNS206.pdf},
entrydate = 20060712,
entryby = {pot}
}

@inproceedings{C22:CostGlue-Valuetools06,
author = {Dragan Savi\'{c} and Matev\v{z} Pusti\v{s}ek and Francesco Potort\i},
title = {A tool for packaging and exchanging simulation results},
booktitle = {proceedings of the International Conference on Performance Evaluation Methodologies and Tools (Valuetools)},
pages = {60},
year = 2006,
month = oct,
publisher = {ACM},
abstract = {Storing and exchanging simulation data is a common task among simulation
practitioners, but quite often it becomes a challenge as huge quantities of data are not
uncommon, and conversion between different formats can become an unwieldy task. After
examining some of the needs of the telecommunications simulation community, we describe the
architecture of the working prototype of a general purpose archiver and converter for big
quantities of simulation data to be released as free software.},
days = {11-13},
keywords = {Measurements; Simulation; Data; Archiving; HDF},
acmclass = {E.5 Files; D.2.12 Interoperability},
isbn = {1-59593-504-5/06/10...$$5.00}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/CostGlue-Valuetools06.pdf}, entrydate = 20060712, entryby = {pot} }  @inproceedings{C21:TCP-startup-IWSCC06, author = {Alberto Gotta and Raffaello Secchi and Francesco Potort\i}, title = {An analysis of {TCP} startup over an experimental {DVB-RCS} platform}, booktitle = {proceedings of the International Workshop on Satellite and Space Communications (IWSSC)}, pages = {176–180}, year = 2006, address = {Madrid (ES)}, month = sep, abstract = {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 make the channel virtually immune from packet errors. These factors, together with the significant round-trip delay of geostationary satellites, combine so that most TCP connections would send all of their data during the Slow Start phase. We investigate the performance of TCP during startup on recent BoD system by observing and explaining the behavior of different TCP flavors on different systems when transmitting data over the Eutelsat's Skyplex Data satellite system. We make recommendations for choosing and improving TCP implementations and for future BoD allocation schemes.}, days = {14–15}, keywords = {TDMA; BoD; DAMA; TCP; startup}, acmclass = {C.2.1 Network Architecture and Design}, isbn = {1-4244-0118-6}, doi = {10.1109/IWSSC.2006.256018}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/TCPstartup-IWSCC06.pdf}, entrydate = 20060712, entryby = {pot} }  @inproceedings{C20:PacketLossHybrid-ASMS06, author = {Paolo Barsocchi and Gabriele Oligeri and Francesco Potort\i}, title = {Packet loss in {TCP} hybrid wireless networks}, booktitle = {proceedings of the Advanced Satellite Mobile Systems Conference (ASMS)}, location = {Herrsching (DE)}, note = {(No page numbers)}, year = 2006, month = may, days = {29–31}, abstract = {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 modelling of the packet loss process in such networks is not an easy task, so very simplified models are frequently used. We present channel state measurements done on fixed-speed IEEE 802.11 terrestrial networks. We use the ns-2 simulator to evaluate the performance of TCP on the said channel. We then evaluate the accuracy of some models that are commonly used to represent the channel state, by comparing these models with actual traces.}, keywords = {Hybrid networks; WiFi; satellite; packet loss; burst}, acmclass = {H.1.0 General}, isbn = {1-42440119-4/06/$$20.00},
ps = {http://fly.isti.cnr.it/pub/papers/ps/PacketLossHybrid-ASMS06.ps.gz},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/PacketLossHybrid-ASMS06.pdf},
entrydate = 20060216,
entryby = {pot}
}

@inproceedings{C19:FZC-IWSSC05,
author = {Paolo Barsocchi and Alberto Gotta and Francesco Potort\i and Francisco
Javier Gonz\'alez-Casta{\~n}o and Felipe Gil-Casti{\~n}eira and Jose I. Moreno and Antonio Cuevas},
title = {Experimental results with forward erasure correction and real video streaming
in hybrid wireless networks},
booktitle = {proceedings of the International Symposium on Wireless Communication Systems (ISWCS)},
year = 2005,
month = sep,
publisher = {IEEE},
location = {Siena (IT)},
pages = {662–666},
note = {International Workshop on Satellite and Space Communications (IWSSC)},
abstract = {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
issue by applying forward erasure correction codes (FZC) to MPEG-4 video sequences exchanged
by the hosts of a hybrid network, made of a satellite link and a wireless LAN using 802.11b
devices. A standard video streaming application runs on one end of the satellite link while,
at the final end, a wireless ad hoc network receives the multicast video stream. This work
aims at demonstrating the improvement in Quality of Service (QoS) of the video transmitted in
the hybrid network. The main parameters measured are the packet loss, the delivery delay, and
the overhead in bandwidth occupancy imposed by the use of FZC. The received video is then
evaluated by using a MOS (Mean Opinion Score) procedure.},
days = {5–9},
keywords = {erasure codes; video; 802.11; satellite; packet loss},
isbn = {0-7803-9206-X/05/$$20.00}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/FZC-IWSSC05.pdf}, entrydate = 20050726, entryby = {pot} }  @inproceedings{C18:fs-research-OSS05, author = {Potort\i, Francesco}, title = {Free software and research}, note = {Short paper}, booktitle = {proceedings of the International Conference on Open Source Systems (OSS)}, editor = {Marco Scotto and Giancarlo Succi}, publisher = {ECIG Edizioni Culturali Internazionali Genova}, location = {Genova (IT)}, pages = {270–271}, year = 2005, month = jul, abstract = {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.}, days = {11–15}, keywords = {free software; advocacy; academy}, url = {http://oss2005.case.unibz.it/Papers/Posters/74.pdf}, ps = {http://fly.isti.cnr.it/pub/papers/ps/Fs-research-OSS05.ps}, pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Fs-research-OSS05.pdf}, entrydate = 20050331, entryby = {pot} }  @inproceedings{C17:TCPsat-VTC2004, author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i}, title = {Goodput optimisation of long-lived {TCP} connections in a rain-faded satellite channel}, booktitle = {proceedings of the IEEE Vehicular Technology Conference (VTC)- Spring}, publisher = {IEEE}, location = {Milano (IT)}, pages = {2901–2905}, year = 2004, volume = 5, month = may, days = {17–19}, abstract = {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 result, TCP performance is significantly impaired by the channel bit error rate. In this paper we investigate the application of different FEC (forward error correction) types/rates and different bit rates, for the optimization of TCP goodput, in transmissions over a rain-faded geostationary satellite channel, provided that the end-to-end protocols are left unaltered. We compare physical-level FEC techniques, such as convolutional encoding/Viterbi decoding and Reed Solomon, link-level erasure codes and their combinations, over a wide field of signal-to-noise conditions of the satellite channel. The case of multiple connections per link is also analyzed, in addition to that of a single connection per link. . In order to evaluate the throughput of TCP long-lived connections we used a fluid simulator ad-hoc developed.}, keywords = {Long-lived TCP connections; rain fading; satellite channel; FEC techniques}, isbn = {0-7803-8256-0/04/$$20.00},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/TCPsatopt-VTC04.pdf},
ps = {http://fly.isti.cnr.it/pub/papers/ps/TCPsatopt-VTC04.ps.gz},
entrydate = 20040225,
entryby = {Francesco Potortì }
}

@inproceedings{C16:Synthema-AIAA-ICSSC01,
author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i and Giacomo Saviozzi and
Marco Boldrini},
title = {The intracoastal satellite communicator system ({ISCS})},
booktitle = {proceedings of the AIAA International Communications Satellite Systems Conference (ICSSC)},
location = {Toulouse (FR)},
pages = 282,
year = 2001,
month = apr,
days = {17–20},
abstract = {This paper describes an application of the ORBCOMM satellite system for
helping pleasure-boat sailors to navigate. The IntraCoastal Satellite Communication System
(ICSCS) is an improvement on the well established ChartPlotter made by Geonav 11E Navionix for
bidirectional coastal communication. By using a terminal of the ORBCOMM system, ICSCS allows
the sailors to access and retrieve information which has been coded ad-hoc on web sites. The
paper briefly describes the software architecture of the system and presents the additional
user facilities. The IntraCoastal Satellite Communicator System has been available on the
market since beginning of year 2000, and has already been installed on many pleasure boats in
Italy.},
keywords = {satellite; Orbcomm; Synthema; navigation},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Synthema-AIAA-ICSSC01.pdf},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C15:GaliLEO-ISTMobileSummit00,
author = {Laurent Franck and Francesco Potort\i},
title = {{GaliLEO}: a simulation tool for {LEO} satellite constellations},
booktitle = {proceedings of the IST Mobile Summit},
location = {Galway (GB)},
pages = {735–758},
year = 2000,
month = oct,
abstract = {Abstract: 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 performance of satellite-based communication networks from as many as possible
points of view. Typical applications include simulation of access techniques, routing
policies, fault management. The simulator is written in Java, and it makes use of dynamic
loading to easily integrate user-written modules. A draft manual is available, and a
preliminary version of the program will be published by the end of 2000.},
keywords = {satellite; LEO; MEO; simulator},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/GaliLEO-ISTMobileSummit00.pdf},
ps = {http://fly.isti.cnr.it/pub/papers/ps/GaliLEO-ISTMobileSummit00.ps.gz},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C14:VnL-SPECTS00,
author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i},
title = {Performance evaluation of a multi-level allocation algorithm for {VBR} traffic
over a {GEO} satellite},
booktitle = {proceedings of the Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS)},
location = {Vancouver, CA (US)},
pages = {452–457},
year = 2000,
month = jul,
abstract = {In this paper we present VnL-TDMA, a new MAC (medium access control) protocol
for accessing in TDMA a satellite channel shared among various earth stations which transmit
mixed traffic (real-time and non-real time). We concentrate on the analysis of the real-time
allocation for variable bit rate (VBR) traffic, and analyse its performance using a
synthetically generated VBR traffic modelled on the basis of the statistical parameters of an
MPEG-2 coded movie in VBR mode. The peak traffic rate of the movie is almost four times higher
than its mean rate, which means that trivial peak rate allocation would waste a lot of the
satellite channel bandwidth, while VnL makes unused bandwidth instantaneously available to all
earth stations to enable them to transmit best-effort traffic.},
keywords = {TDMA; VBR; MPEG; allocation method; multilevel; satellite},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/VnL-SPECTS00.pdf},
ps = {http://fly.isti.cnr.it/pub/papers/ps/VnL-SPECTS00.ps.gz},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C13,
author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i and Antonio Chimienti
and Maurizio Lucenteforte},
title = {{DRS} compression applied to {MPEG-2} video data transmitted over a satellite
channel},
booktitle = {proceedings of the IEEE Symposium on Computers & Communications (ISCC)},
location = {Antibes-Juan Les Pins (FR)},
pages = {259–266},
year = 2000,
month = jul,
days = {4–6},
email = {mailto:Potorti@isti.cnr.it},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C12:GaliLEO-COST253,
author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i and Laurent Franck},
title = {{GaliLEO}: a simulation tool for traffic on {LEO} satellite
constellations. Presentation of the architecture},
note = {Not peer reviewed},
booktitle = {proceedings of the COST 252-253-255 Workshop},
location = {Toulouse (FR)},
pages = {145–153},
year = 1999,
month = may,
abstract = {The aim of this work is to create a tool that can simulate the transmission of
both connection-oriented and connection-less traffic over a constellation of LEO/MEO (Low
Earth Orbit/ Medium Earth Orbit) satellites. We hope to provide a performance evaluation of
various constellation access techniques and routing policies. The simulator, named GaliLEO,
will be written in Java and will integrate results from another simulator (CONSIM from CSELT,
I) to study the impact of faults in system performance. GaliLEO should eventually become the
simulation tool for the Cost253 action, thus providing a common tool for all studies taking
place in the action. At the time of writing, considerable interest is being shown in GaliLEO.},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/GaliLEO-COST253.pdf},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C11,
author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i},
title = {An emulator for testing the performance of framed access schemes},
booktitle = {proceedings of the IEEE Conference on Global Communications (GLOBECOM)},
location = {Sidney (AU)},
pages = {1590–1593},
year = 1998,
vol = 3,
month = nov,
days = {9–13},
email = {mailto:Potorti@isti.cnr.it},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C10:NoisyVBR-ICT98,
author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i and Antonio Chimienti
and Maurizio Lucenteforte},
title = {Experimental results of {MPEG-2} coded video transmission over a noisy
booktitle = {proceedings of the International Conference on Telecommunications},
location = {Porto Carras (GR)},
pages = {221–225},
year = 1998,
month = jun,
days = {21–25},
keywords = {MPEG video; scalability; quality factor; satellite; fading},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/NoisyVBR-ICT98.pdf},
ps = {http://fly.isti.cnr.it/pub/papers/ps/NoisyVBR-ICT98.ps.gz},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C09,
author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i and G\'erard Maral},
title = {Bursty data traffic via satellite: performance comparison between two {TDMA}
access schemes},
booktitle = {proceedings of the European Conference on Satellite Communications (ECSC)},
location = {Roma (IT)},
pages = {170–175},
year = 1997,
month = nov,
days = {18–20},
email = {mailto:Potorti@isti.cnr.it},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C08,
author = {Nedo Celandroni and Francesco Potort\i},
title = {A fractal attenuation model for the {Ka} band},
booktitle = {proceedings of the Ka Band Utilisation Conference},
location = {Sorrento (IT)},
pages = {307–314},
year = 1997,
month = sep,
days = {15–18},
email = {mailto:Potorti@isti.cnr.it},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C07:FadeCountermeasure-Globecom96,
author = {Nedo Celandroni and Francesco Potort\i},
title = {An inexpensive rain fade countermeasure technique for {DA-TDMA} satellite
systems},
booktitle = {proceedings of the IEEE Conference on Global Communications (GLOBECOM)},
location = {London (UK)},
pages = {1001–1005},
year = 1996,
vol = 2,
month = nov,
days = {18–22},
abstract = {Rain attenuation countermeasure systems for geostationary satellite
transmissions have been proposed that use a variety of methods. This paper presents a
technique which only requires a burst modem that is able to vary its bit and coding rate on a
sub-burst basis coupled with a convolutional encoder/Viterbi decoder. A complete method for
predicting the attenuation at the receive time is described for two different DA-TDMA systems,
using centralised and distributed control, respectively. The method is used for choosing the
up power, bit and coding rate of the data to be transmitted. Its performance is evaluated on
the basis of experimental results.},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C06,
author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i},
title = {The performance of the {FODA/IBEA} satellite access scheme measured on the
{Italsat} satellite},
booktitle = {proceedings of the International Conference on Digital Satellite Communications (ICDSC)},
location = {Brighton (UK)},
pages = {332–338},
year = 1995,
vol = 1,
month = may,
days = {15–19},
number = 403,
email = {mailto:Potorti@isti.cnr.it},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C05,
author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i},
title = {The {Italian} contribution to the integration of terrestrial and satellite
networks},
booktitle = {proceedings of the final symposium of the COST-226 project - Integrated
Space/Terrestrial Networks},
location = {Budapest (HU)},
pages = {159–169},
year = 1995,
month = may,
days = {10–12},
email = {mailto:Potorti@isti.cnr.it},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C04:Outage-ICC93,
author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i},
title = {Outage probability of an adaptive {TDMA} satellite access scheme},
booktitle = {proceedings of the International Conference on Communications (ICC)},
location = {Geneva (CH)},
year = 1993,
vol = 3,
pages = {1449–1454},
month = may,
days = {23–26},
doi = {10.1109/ICC.1993.397527},
isbn = {0-7803-0950-2},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Outage-ICC93.pdf},
ps = {http://fly.isti.cnr.it/pub/papers/ps/Outage-ICC93.ps.gz},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C03,
author = {Nedo Celandroni and Erina Ferro and Maurizio Neri and Francesco Potort\i},
title = {The {Italian} {Olympus} {TDMA} experiment},
booktitle = {proceedings of the Olympus Utilization Conference},
location = {Sevilla (ES)},
pages = {55–59},
year = 1993,
month = apr,
days = {20–22},
email = {mailto:Potorti@isti.cnr.it},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C02,
author = {Nedo Celandroni and Erina Ferro and Nick James and Francesco Potort\i},
title = {Design and implementation of a flexible, software based {TDMA} system},
booktitle = {proceedings of the IEEE Conference on Global Communications (GLOBECOM)},
location = {Orlando, FL (US)},
pages = {693–699},
year = 1992,
vol = 2,
month = dec,
days = {6–9},
email = {mailto:Potorti@isti.cnr.it},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inproceedings{C01,
author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i},
title = {A traffic generator for the performance evaluation of a satellite network},
booktitle = {proceedings of the International Conference on Communication Technology (ICCT)},
location = {Beijing (CN)},
pages = {9.08.01–9.08.05},
year = 1992,
vol = 1,
month = sep,
days = {16–18},
email = {mailto:Potorti@isti.cnr.it},
entrydate = 20001013,
entryby = {Francesco Potortì }
}

@inbook{B06:Wichmo-ISI10,
author = {Erina Ferro and Francesco Potort\i},
editor = {Ilias andrikopoulos and Konstantinos liolis},
title = {ISI Trials and Demonstrations Report},
chapter = {{7: SatNEx JA2410 FT1 WICHMO}},
publisher = {ISI - The Integral Satcom Initiative},
year = 2010,
month = jan,
pages = {47–51},
note = {White paper},
keywords = {simulation; FER; two-ray; AWGN; fading},
acmclass = {B.8.2 Performance Analysis and Design Aids; C.2 Computer-Communication Networks},
email = {mailto:Potorti@isti.cnr.it},
entrydate = 20100316,
entryby = {pot}
}

@inbook{B05:Votos-ISI10,
author = {Erina Ferro and Francesco Potort\i},
editor = {Ilias andrikopoulos and Konstantinos liolis},
title = {ISI Trials and Demonstrations Report},
chapter = {{6: SatNEx JA2410 FT4 VOTOS}},
publisher = {ISI - The Integral Satcom Initiative},
year = 2010,
month = jan,
pages = {43–46},
note = {White paper},
keywords = {Hybrid networks; WiFi; satellite; packet loss; burst},
acmclass = {H.1.0 General},
email = {mailto:Potorti@isti.cnr.it},
entrydate = 20100316,
entryby = {pot}
}

@techreport{B04:CostGlueMetadata-TR08,
author = {Francesco Furfari and Francesco Potort\i and Dragan Savi\'{c}},
title = {The {CostGlue} {XML} schema},
institution = {CNR-ISTI},
number = {cnr.isti/2008-TR-003},
year = 2008,
month = jan,
abstract = {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
\url{http://wnet.isti.cnr.it/software/costglue/schema/2007/CostGlue.xsd}, or at its official
repository, at \url{http://lt.fe.uni-lj.si/costglue/schema/2007/costglue.xsd}.},
acmclass = {H.3.0 General; H.2.7 Database Administration},
entrydate = 20080123,
entryby = {pot}
}

@techreport{B03:Rural-model-ISTI06,
author = {Paolo Barsocchi and Gabriele Oligeri and Francesco Potort\i},
title = {Transmission range and frame error process in rural area {Wi-Fi} networks},
institution = {CNR-ISTI},
number = {ISTI-2006-TR-43},
year = 2006,
month = jun,
abstract = {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 simulator can miss important transmission impairments that are apparent even at short
transmitter-receiver distances. We propose a two-ray propagation model which improves on those
commonly used for simulation purposes. Frames were transmitted and received by using two cheap
laptops with standard Linux drivers. Measurements also show that packet loss at the frame
level is a Bernoullian process for time spans of few seconds, and that longer time spans
exhibit a more complex behaviour, meaning that the 2-state Markov-modulated process often used
in the literature is not a good match for rural areas. },
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/Rural-model-ISTI06.pdf},
entrydate = 20070227,
entryby = {pot}
}

@techreport{B02:WiFi-measure-ISTI06,
author = {Paolo Barsocchi and Gabriele Oligeri and Francesco Potort\i},
title = {Validation for 802.11b wireless channel measurements},
institution = {CNR-ISTI},
number = {ISTI-2006-TR-29},
year = 2006,
month = jun,
abstract = {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
wireless environment. In order to validate the measurement procedure, we carry out a
comprehensive measurement campaign in a rural environment and we evaluate statistics about
frame loss and signal level in the IEEE 802.11b wireless channel. Frames are transmitted and
received by using two cheap laptops with standard Linux drivers and purposely written
software. A first validation step compares the behaviour of the received signal power level
with the two-ray propagation model. A subsequent step compares the observed frame loss with
the expected coding gain at various transmission rates. Graphs of the observed frame loss rate
at different transmission rates are provided for a rural environment, where the two-ray
propagation model is a good fit.},
pdf = {http://fly.isti.cnr.it/pub/papers/pdf/WiFi-measure-ISTI06.pdf},
entrydate = 20061012,
entryby = {pot}
}

@techreport{B01:TCPonSat-ISTI03,
author = {Nedo Celandroni and Erina Ferro and Francesco Potort\i},
title = {Goodput optimization of long-lived {TCP} connections in a faded satellite
channel},
note = {Extended version},
institution = {CNR-ISTI},
number = {ISTI-2003-TR-69},
year = 2003,
month = jun,
abstract = {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 result,
TCP performance is significantly impaired by the channel bit error rate. In this paper we
investigate the application of different FEC (forward error correction) types/rates and
different bit rates, for the optimization of TCP goodput, in transmissions over a rain-faded
geostationary satellite channel, provided that the end-to-end protocols are left unaltered. We
compare physical-level FEC techniques, such as convolutional encoding/Viterbi decoding and
Reed Solomon, link-level erasure codes and their combinations, over a wide field of
signal-to-noise conditions of the satellite channel. The case of multiple connections per link
is also analyzed, in addition to that of a single connection per link. In order to evaluate
the throughput of a TCP long-lived connection we used a method that is midway between analysis
(fluid model) and simulation.},
ps = {http://fly.isti.cnr.it/pub/papers/ps/TCPonSat-ISTI03.ps.gz},