Dajana Cassioli

Dajana Cassioli
Università degli Studi dell'Aquila | Università dell'Aquila · Department of Information Engineering, Computer Science and Mathematics

PhD

About

72
Publications
16,754
Reads
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4,091
Citations
Citations since 2016
21 Research Items
949 Citations
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
Additional affiliations
May 2011 - present
Università degli Studi dell'Aquila
Position
  • Professor (Assistant)
Education
November 1999 - June 2003
University of Rome Tor Vergata
Field of study
  • Wireless Communications

Publications

Publications (72)
Article
Full-text available
Advances in technology call for a parallel evolution in the software. New techniques are needed to support this dynamism, to track and guide its evolution process. This applies especially in the field of embedded systems, and certainly in Wireless Sensor Networks (WSNs), where hardware platforms and software environments change very quickly. Common...
Conference Paper
We discuss how different service placement can improve DASH performances on an edge-enabled architecture in a MEC infrastructure. Network experiments emulate a real optical network behaviour allowing to measure improvements with different service placement.
Article
Full-text available
This paper presents MaxHadoop, a flexible and scalable emulation tool, which allows the efficient and accurate emulation of Hadoop environments over Software Defined Networks (SDNs). Hadoop has been designed to manage endless data-streams over networks, making it a tailored candidate to support the new class of network services belonging to Big Dat...
Conference Paper
We discuss how different degrees of slice isolation influence resource allocation in protected optical metro-aggregation networks. The case of slice reliability with dedicated protection at lightpath is modelled and numerically evaluated.
Article
Full-text available
Demanding throughput, latency and scalability requirements of 5G networks may be addressed by relying on dense deployments of small cells. Coordinated Multipoint (CoMP) Coordinated Scheduling (CS) techniques are introduced to reduce inter-cell interference in case of dense deployment, given that local CoMP-CS information from the evolved NodeBs (eN...
Article
5G targets to offer a huge network capacity to support the expected unprecedented traffic growth due mainly to mobile and machine-type services. Thus, the 5G access network has to comply with very challenging architectural requirements. Mobile network scalability is achieved by playing appropriately with the centralization of network functions and...
Conference Paper
The wide spread of Big Data applications and services raised the need of implementing dedicated frameworks for the efficient management of data storage and access. Complex data center architectures have been defined to support such appli- cations, where the network connections are often the bottleneck for data access and retrieval. In this paper we...
Article
Full-text available
Cooperative Cyber-Physical Systems (Co-CPSs) can be enabled using wireless communication technologies, which in principle should address reliability and safety challenges. Safety for Co-CPS enabled by wireless communication technologies is a crucial aspect and requires new dedicated design approaches. In this paper, we provide an overview of five C...
Conference Paper
Software Defined Converged Access represents a feasible solution to effectively address 5G traffic demands. This paper proposes an integrated mobile-optical control for wavelength and bandwidth allocation. Evaluations of bandwidth utilization and techno-economic viability are provided.
Conference Paper
Full-text available
Software Defined Mobile Networks and Software Defined Access Networks bring programmability principle into mobile and optical domains. In this work we propose an integrated control approach and show the benefit in terms of energy efficiency.
Conference Paper
To address demanding requirements in terms of expected throughput, latency and scalability, 5G networks will offer high capacity to support huge volumes of traffic generated by heterogeneous services. Dense deployment of small cells can provide a valid solution but are prone to high levels of interference especially at the cell-edge. However, to re...
Conference Paper
In 5G mobile communication systems, Coordinated scheduling (CS) is a Coordinated Multipoint (CoMP) technique exploited to improve the cell throughput by reducing the interference among contemporary transmissions at the cell edge. CS is based on coordinating the transmission scheduling decisions by exchanging scheduling information among the evolved...
Conference Paper
Full-text available
This work studies how cell information distribution for Coordinated Scheduling in Cooperative Multi Point Transmission might be affected by the backhaul infrastructure. Several CoMP schemes are investigated and a novel OSPF based advertisement protocol for CoMP information distribution is proposed. Star topology with centralization at macro cell is...
Conference Paper
60 GHz mmWaves radios nowadays are considered as a core short-range wireless technology capable to solve the spectrum shortage due to the exponentially increasing number of wireless users and QoS sensitive multimedia and home entertainment applications. Although there are several published standards, the 60 GHz wireless developmental field is still...
Conference Paper
Beside the existence of well established standards targeting the 60 GHz mmWaves band and the availability of the very first commercial products on the wireless market, there are still open research challenges at different levels of system design. Considered as the future core short-range wireless technology, 60 GHz networks are expected to revoluti...
Conference Paper
Full-text available
By providing reliable high-capacity wireless links, the 60 GHz mmWaves band is expected to revolutionize the future wireless multimedia and home entertainment usage model, which is an inseparable part of the 5G concept. Besides the efforts within the frameworks of established standards, such as 802.15.3.c and 802.11ad, there is still lack of experi...
Conference Paper
Full-text available
Ultra-wideband (UWB) radios have the potential to achieve very high data rates. However, the coverage is limited over very short ranges, due to the tight limits imposed to the allowed transmission power by the worldwide spectrum regulation at microWaves. Recently, a very large bandwidth has been made available by worldwide regulation at mmWaves. Wi...
Conference Paper
Full-text available
5G technology is a broad concept that describes the envisaged disruptive evolution of communication technology in the near future, with a dramatic increase in the network data-rate and capacity to support a variety of innovative services. The exploitation of the new spectrum available at mmWaves represents a key enabler for 5G. mmWaves are expected...
Conference Paper
Full-text available
Multi-gigabit 60 GHz radios are expected to match QoS requirements of modern multimedia applications. Several published standards were defined based on performance evaluations over standard channel models. Unfortunately, those models, and most models available in the literature, do not take into account the behavior of 60 GHz channels at different...
Conference Paper
Full-text available
Indoor positioning gained great interest in recent years. Several performance evaluations are available for consolidated systems, especially for ultra-wideband radios. Given the current success of mmWaves networks, in this paper, we investigate the performance of RSSI localization systems operating at mmWaves. Our reference is the IEEE 802.11ad sta...
Chapter
Full-text available
Telemedicine has been around for decades, and some apparatuses are currently in operation in few hospitals. Relying on advanced wireless technologies, which enable the use of pervasive communications for a variety of different applications, new-generation systems for healthcare become non-invasive, broadband and mobile. High-data rate wireless syst...
Conference Paper
Full-text available
Measurements of the 60 GHz ultra-wideband (UWB) indoor channel done in a modern office building at the University of L'Aquila, Italy, are presented. The UWB channel sounder is based on a PN-sequence correlation technique with a pulse width of 0.8 ns. Signals are recorded in different locations in line-of-sight and non-line-of-sight scenarios, and f...
Conference Paper
Full-text available
Measurements of the 60 GHz UWB indoor channel done in a modern office building at the University of L'Aquila, Italy, are presented. The channel sounder is based on a PN-sequence correlation technique with a pulse width of 0.8 ns. Signals are recorded in different locations in line-of-sight and non-line-of-sight scenarios, and for each location the...
Article
The acquisition and distribution of multimedia content, such as still images, audio and video streams, are the new frontier of wireless sensor networks (WSNs). Scalar data WSNs commonly rely on the IEEE 802.15.4 standard that defines suitable physical and medium access control layers, whereas wireless multimedia sensor networks (WMSNs) need advance...
Conference Paper
Full-text available
This paper describes a measurement campaign performed in a modern building at the University of L'Aquila, Italy. Measurements are taken for two large bands around 60 GHz, i.e. 54-59 and 61-66 GHz. The channel probe is an ultrawideband (UWB) PN-sequence signal having a bandwidth of 1.2 GHz, which is up-converted to the 60 GHz band and finely tuned i...
Chapter
Full-text available
Cognitive behavioral systems would definitely benefit from a supporting technology able to automatically recognize the context where humans operate, their gestures and even facial expressions. Such capability poses challenges for many researchers in various fields because the ultimate goal is to transfer to machines the human capability of represen...
Article
UWB has been on the scene for about two decades. Results of extensive tests and measurements, and experience acquired from the design and operation of commercial products, all concurred to depict UWB as a very promising technology in many context and applications, thanks to its intrinsic characteristics. Now, wireless communications are colonizing...
Article
This paper presents a project that has been recently funded by means of the ERC Starting Grant (http://erc.europa.eu/). The main goal of the project is to develop a new generarion of wireless sensor networks infrastructure to support innovative services for ubiquitous sensing and video. The work is in a very preliminary phase so the paper presents...
Article
We give a sufficient condition that insures that the impulse response of a channel is of minimum phase. The condition is that the energy of the first path be larger than the power spectral density of all subsequent paths. Establishing a lower bound to the first path energy, this condition is more likely to be met if transmitter and receiver are in...
Conference Paper
Routing performance is evaluated for a network of low data rate location/tracking UWB sensors that implement the energy-aware greedy perimeter stateless routing (e-GPSR). Sensors have both location/tracking and communication capabilities, that allow the use of a geographic reactive multi-hop routing protocol, like the e-GPSR. In order to efficientl...
Conference Paper
Full-text available
Low data rate location/tracking UWB sensors have both location/tracking and communication capabilities, calling for novel routing and MAC strategies, in order to efficiently manage ranging and data transfer. In this paper, a particular configuration is adopted for routing and MAC, that are strongly correlated, because both are tied to the ranging m...
Conference Paper
A new location-based reactive multi-hop protocol, namely the e-GPSR algorithm, is tested for the use in UWB sensor networks for logistic applications. Specifically, the impact of location information errors on the algorithmpsilas performance is investigated when a Manhattan mobility model is assumed and a suitable position prediction model is intro...
Conference Paper
UWB technology enables accurate positioning. The integration of communication and location-tracking capabilities will strongly enhance performance and enlarge the application field of UWB systems. Location-based routing protocols may be more efficient and robust than other routing strategies. In this paper we propose an enhanced "energy-aware" vers...
Conference Paper
Industrial and logistics processes and scenarios are a major field of increasing use of wireless technology. Particularly the attempt to increase the efficiency of processes requires the stringent supervision of goods, tools and machinery as to their states and position/location. The plurality, heterogeneity and independence of processes in a produ...
Article
Ultra-wideband (UWB) wireless technology is envisaged to play a key role in B3G wireless systems, guaranteeing very high bit rates, low power consumption, low costs and location capabilities. The availability of low cost and efficient devices makes UWB technology very competitive on the communications market. However, its worldwide acceptance mainl...
Article
Full-text available
One of the major issues for the design of ultra-wideband (UWB) receivers is the need to recover the signal energy dispersed over many multipath components, while keeping the receiver complexity low. To this aim we consider two schemes for reduced-complexity UWB Rake receivers, both of which combine a subset of the available resolved multipath compo...
Article
Full-text available
A comprehensive statistical model is described for ultrawideband (UWB) propagation channels that is valid for a frequency range from 3-10 GHz. It is based on measurements and simulations in the following environments: residential indoor, office indoor, builtup outdoor, industrial indoor, farm environments, and body area networks. The model is indep...
Conference Paper
The performance of an UWB system for high data rate transmissions is evaluated in terms of link outage probability and average aggregate network throughput. The network topology is based on a clustered structure, formed by a multitude of piconets coexisting in a given area. The piconets operate in accordance to the IEEE 802.15.3 standard. Two diffe...
Article
The paper presents the statistical model for the ultra-wideband (UWB) indoor channel having a bandwidth of 2.4 GHz and a central frequency of 4.78 GHz. The model is based on propagation experiments performed in different rooms on a floor of an office-laboratory building. Within each room the receiver antenna is automatically moved over a square gri...
Article
Full-text available
Results of experimental trials performed to assess the coexistence of the UMTS systems and the UWB emissions are presented. The performance degradation of the UMTS system vs. the in-channel UWB interference power has been measured in terms of the bit error rate and the noise rise.
Article
We have performed a propagation measurement campaign at the University of Rome Tor Vergata, Rome, Italy. We have sounded the channel by a probing signal at a carrier frequency of 4.78 GHz modulated by a train of pulses having a duration of 0.4 ns shaped by a pseudonoise (PN) sequence. The measurement band falls (3.6-6 GHz) in the frequency range al...
Conference Paper
Full-text available
The paper presents a propagation experiment performed in a modern office/laboratory building to investigate the UWB indoor channel behavior over the band 3.6-6 GHz. We accomplished measurements employing a correlative channel sounding technique. PN-sequence modulation is applied to a train of 0.4ns pulses and a pair of direct sequence UWB transmitt...
Conference Paper
Full-text available
This paper describes a comprehensive statistical model for UWB propagation channels that is valid for a frequency range from 3-10 GHz. It is based on measurements and simulations in the following environments: residential indoor, office indoor, built-up outdoor, industrial indoor, farm environments, and body area networks. The model is independent...
Article
Full-text available
Bluetooth is a low-cost, short-range wireless technology capable of providing many communication functionalities, ranging from wire replacement to simple personal area networking. In Bluetooth local networking applications, a critical issue still under study is the evaluation of the network performance when multiple piconets are simultaneously acti...
Conference Paper
We performed a propagation experiment in a modern office building in Rome, Italy. The propagation measurements are based on the use of a vector network analyzer (VNA) over the band 2-12 GHz, with a frequency resolution of 5 MHz. We propose a novel analysis of the dependence of path loss laws on the carrier frequency and bandwidth. Our experimental...
Article
With the new release of the Federal Communication Commission on matters of regulation of marketing and operation of ultra-wideband (UWB) devices, an analytical framework to enable tractable analysis of the spectrum shape of these signals is needed. We extend the framework introduced by W. A. Gardner to the case of UWB signals. We introduce a genera...
Conference Paper
An extensive measurement campaign is carried out in a modern office building. The channel is sounded by a carrier at 4.78 GHz modulated by a train of pulses, each having a duration of 0.4 ns, shaped by a pseudo noise (PN) sequence, covering the band 3.6-6 GHz. The transmitter is moved in six different positions on the floor, while the receiver is m...
Conference Paper
We derive a statistical model of the UWB indoor channel based on the experimental data collected in a modern office building. Measurements were made in different rooms throughout the floor and within each room the receiver antenna was moved over a square grid of 25 × 25 locations spaced 2 cm apart. The measurement technique was based on the use of...
Article
Full-text available
This is a discussion document for the IEEE document of the IEEE 802.15.4a channel modeling subgroup. It provides models for the following frequency ranges and environments: for UWB channels dovering the frequency range from 2 to 10 GHz, it covers indoor residential, indoor office, industrial, outdoor, and open outdoor environments (usually with a d...
Article
We consider an ultra-wide bandwidth system using reduced-complexity Rake receivers, which are based on either selective (called SRake) or partial (called PRake) combining of a subset of the available resolved multipath components. We investigate the influence of the spreading bandwidth on the system performance using the two considered types of Rak...
Conference Paper
Full-text available
We consider an ultra-wide bandwidth system using reduced-complexity RAKE receivers, which are based on either selective (called SRake) or partial (called PRake) combining of a subset of the available resolved multipath components. We investigate the influence of the spreading bandwidth on the system performance using the two considered types of RAK...
Article
Full-text available
We establish a statistical model for the ultra-wide bandwidth (UWB) indoor channel based on an extensive measurement campaign in a typical modern office building with 2-ns delay resolution. The approach is based on the investigation of the statistical properties of the multipath profiles measured in different rooms over a finely spaced measurement...
Conference Paper
Full-text available
Bluetooth is considered as a low-cost short-range wireless technology to provide communication functionalities, ranging from wire replacement to simple personal area network. In Bluetooth local networking applications a critical issue still under study is the evaluation of the network capacity when multiple piconets are simultaneously active in the...
Conference Paper
Full-text available
We provide a closed-form expression for the packet loss probability in Bluetooth networks accounting for capture effects due to propagation losses. The effectiveness of the proposed approach is assessed comparing the analytical results with those obtained from Monte Carlo simulations. By considering different scenarios, we show the dependence of re...
Conference Paper
Full-text available
We evaluate the link performance of an ultra-wide band (UWB) system using reduced-complexity RAKE receivers, which are based on either partial combining (called PRAKE) or selective combining (called SRAKE). The first is suboptimum and combines the first arriving multipath components, while the second combines the strongest multipath components. We...
Conference Paper
Full-text available
We evaluate a measurement campaign for ultrawideband indoor channels in a typical modern office building. We show that the power delay profile can be well modeled by a single exponential decay with a statistically distributed decay-time constant. We also analyze path loss, amplitude distribution function, and temporal correlation between adjacent m...