Giovanni Giambene

Giovanni Giambene
Università degli Studi di Siena | UNISI · Department of Information Engineering and Mathematical

Electronics Engineering

About

257
Publications
51,951
Reads
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2,868
Citations
Citations since 2016
40 Research Items
1114 Citations
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
Introduction
My current research activity is on LTE-A (WiNeMo COST Project) for HetNets scenarios and on smart gateway diversity and network coding applications for Terabit satellite networks (RTP project by ESA).
Additional affiliations
October 2015 - present
Università degli Studi di Siena
Position
  • Professor (Associate)
October 2015 - present
Università degli Studi di Siena
Position
  • Professor (Associate)
Description
  • - Networking, master level, - Fundamentals of telecommunications
November 2002 - September 2015
Università degli Studi di Siena
Position
  • Professor (Associate)
Description
  • Networking, master-level

Publications

Publications (257)
Article
Full-text available
Forests play a fundamental role in preserving the environment and fighting global warming. Unfortunately, they are continuously reduced by human interventions such as deforestation, fires, etc. This paper proposes and evaluates a framework for automatically detecting illegal tree-cutting activity in forests through audio event classification. We en...
Chapter
The Internet has become essential for today’s life. This chapter aims to describe the main Internet protocols for the network layer: IP addressing, Routing algorithms (like the Dijkstra one), Distributed Routing protocols, IntServ (and the related deterministic queuing theory), and Diffserv. The second part of this chapter describes the transport l...
Chapter
This chapter starts with a brief look at the history of telecommunications. Then, the ISO/OSI protocol stack model and transmission media are also addressed. The second part of this chapter presents essential details of legacy networks (like, X.25, ISDN, Frame Relay, and ATM) with the aim to provide general concepts on the way to manage network tra...
Chapter
This chapter deals with the basic aspects of queuing theory as stochastic processes and then addresses the Markov queues showing how they can be solved and the most important performance parameters derived. In particular, the following queuing systems are solved as: M/M/1, M/M/S, M/M/S/S, M/M/S/S/P. The Erlang-B analysis is provided and applied to...
Chapter
The Markovian chains and the related queues have the advantage of a simple solution method to determine the state probability distribution. Unfortunately, there are many cases where the service time has not an exponential distribution. This section presents the analytical method to solve the M/G/1 queue in the transform domain in terms of probabili...
Chapter
In the previous chapters, we have investigated systems composed of a single queue that can be solved using Markov chains or Imbedded Markov chains. This chapter considers analytical methods that allow us to model the mean delay of networks of queues (considered as store-and-forward networks), where the output from a queue can become the input to th...
Chapter
This Chapter deals with the basis of the probability theory, the characterization of random variables using density and distribution functions, most common continuous and discrete random variables, how to deal with sum, difference, product and division of random variables, the use of the probability generating function, characteristic function, and...
Chapter
Local area networks make use of a data link protocol to connect the various hosts in them. This chapter provides a background on Medium Access Protocol (MAC), including Aloha and CSMA types. Methods are presented for the performance analysis of the most common protocols. A special approach, called Equilibrium Point Analysis, has also been discussed...
Article
Full-text available
Mega-constellation networks (MCNs) based on low earth orbit (LEO) satellites have become increasingly important with many projects in the design or implementation phase. For those MCN systems with inter-satellite links (ISLs), the large number of satellites increases the routing complexity and the required hop-count of ISL paths. This paper aims to...
Book
This thoroughly revised textbook provides a description of current networking technologies and protocols as well as important new tools for network performance analysis based on queuing theory. The third edition adds topics such as network virtualization and new related architectures, novel satellite systems (such as Space X, OneWeb), jitter and it...
Conference Paper
Full-text available
There is today a renewed interest in satellite communications. It is expected that many new systems will be operative in a short time. They will become part of the aerial component of 5G, also including high-altitude balloons and drones for focused coverages. The interest of this paper is to investigate a satellite 5G scenario for massive Machine T...
Article
The high data-rate of terminals together with the anywhere-anytime user connectivity concept makes the simultaneous use of terrestrial and satellite infrastructures a necessity. To achieve a reliable and timely distribution of contents, there are important technical challenges concerning the implementation of multipath communication protocols and r...
Conference Paper
Full-text available
One of the key drivers for next-generation mobile communications, 5G, is the support of the Internet of Things (IoT) with billions of objects being connected to the Internet with low latency. The 5G technology will support the realization of smart cities, smart environments, and big data applications. Within the 5G framework, the terrestrial servic...
Article
Future 5G mobile communication systems are expected to integrate different radio access technologies, including the satellite component. Within the 5G framework, the terrestrial services can be augmented with the development of HTS systems and new mega-constellations meeting 5G requirements, such as high bandwidth, low latency, and increased covera...
Article
Provisioning of IoT/M2M services over satellite has been experiencing a continuous growth in the last years, which is expected to further increase in the near future so as to meet the demands of users and enterprises. The design of a suitable network architecture is, hence, of paramount importance to properly take into account the requirements impo...
Article
The rapid growing data traffic brings more and more pressure to the wireless networks, which is predicted to increase by over 10,000 times in the next 20 years. However, currently, there is still large number of population without coverage of mobile service. In addition to the issue of coverage, future wireless networks also need to guarantee the s...
Article
The rapid growing data traffic brings more and more pressure to the wireless networks, which is predicted to increase by over 10,000 times in the next 20 years. However, currently, there is still large number of population without coverage of mobile service. In addition to the issue of coverage, future wireless networks also need to guarantee the s...
Conference Paper
Full-text available
This paper deals with forward link scheduling at a terrestrial Gateway (GW) for a geostationary satellite system based on the DVB-S2/S2X standard. We consider the case of Time-Slicing (TS) that deserves particular attention for the current market of high-throughput low-cost user terminals. Two QoS traffic classes and related requirements have been...
Article
This paper provides an analytical framework to characterize the performance of Heterogeneous Networks (HetNets), where the positions of base stations and users are modeled by spatial Poisson Point Processes (stochastic geometry). We have been able to formally derive outage probability, rate coverage probability, and mean user bit-rate when a freque...
Conference Paper
Full-text available
This paper deals with the performance of LTE-A (Long Term Evolution-Advanced) cellular networks for supporting operational, safety-critical signaling, and standard IT services for urban transportation. Our interests have been focused on Light Rail Transit (LRT) signaling performance for the Songjiang (China) tramway project. Several stationary and...
Conference Paper
Device-to-Device (D2D) communication is a promising technology for LTE-A and future 5G cellular systems to provide proximity services especially for public safety and emergency scenarios. We investigate here the underlay mode where Cellular Users (CUEs) and D2Ds can transmit on the same sub-channels inside a cell thus interfering each other. This p...
Article
This paper deals with the planning of two-layer Long Term Evolution-Advanced (LTE-A) cellular systems, taking both co-tier and cross-tier interference into account. In particular, we propose the novel Multi-level Soft Frequency Reuse (MSFR) scheme, where the users in three different regions of a macro/micro cell adopt distinct frequency segments an...
Article
This paper deals with the performance evaluation of different packet scheduling schemes for Long Term Evolution mobile satellite systems based on the adoption of a multi-user MIMO technique. The major breakthrough of MIMO technology in terrestrial networks has motivated the interest here for the adoption of MIMO in mobile satellite systems as well....
Article
Since their conception, satellite communications have been regarded as a promising tool for all environments where the terrestrial infrastructure is limited in capacity or to take advantage of the multicasting/broadcasting capabilities inherent in satellite technology. Recent advances have seen satellite technology mature to a more prominent role i...
Book
This book constitutes the proceedings of the 8th International Conference on Wireless and Satellite Services, WiSATS 2016, held in Cardiff, UK, in September 2016. The conference was formerly known as the International Conference on Personal Satellite Services (PSATS) mainly covering topics in the satellite domain. As the scope of the conference wid...
Book
Since their conception satellites have offered the promise of more capacity for terrestrial communication systems or to exploit their inherent multicasting and broadcasting capabilities. Recent advances in satellite technology have resulted in the integration of satellite and terrestrial networks to meet the quality and capacity requirements of mod...
Article
This paper proposes a Quality of Service (QoS) management framework for High Throughput Satellite (HTS) systems using EHF frequency bands, which can achieve high capacity provided that feeder link outage events caused by severe weather conditions can be properly counteracted. To this regard, Smart Gateway Diversity (SGD) architectures implementing...
Article
Full-text available
Machine-to-machine services are witnessing an unprecedented diffusion, which is expected to result in an ever-increasing data traffic load. In this context, satellite technology is playing a pivotal role, since it enables a widespread provisioning of machine-to-machine services. In particular, oil industry, maritime communications, as well as remot...
Conference Paper
Full-text available
Satellite networks are expected to support multimedia traffic flows, offering high capacity with QoS guarantees. This paper deals with Multipath-TCP (MPTCP), which exploits multiple TCP connections using different paths in order to improve user’s throughput. In this study, MPTCP is combined with network coding to protect TCP transmissions from pack...
Conference Paper
SatNEx IV project aims at studying medium and long term directions of satellite telecommunication systems for any of the commercial or institutional applications that can be considered appealing by key players although still not mature enough for attracting industry or initiating dedicated ESA R&D activities. This paper summarizes the first ye...
Conference Paper
Satellite networks are expected to support multimedia traffic flows, offering high capacity with QoS guarantees. However, system efficiency is often impaired due to erasure channel effects causing packet losses. Reconfigurable and adaptive air interfaces are possible solutions to alleviate some of the problems. On the other hand, network coding is...
Conference Paper
Full-text available
With the increasing demand of mobile data traffic, cellular networks are evolving towards heterogeneous systems involving cells of different sizes (e.g., pico, micro, and macro cells). The presence of small cells is causing new interference issues that require the introduction of frequency reuse techniques suitable to manage both co-tier and cross-...
Article
Full-text available
Next-generation satellite networks will build on smart gateway diversity (SGD) architectures based on the large capacity offered by high-frequency bands (Q, V, and W) in order to achieve very high system availability figures (greater than 99%). Despite the numerous studies about system design, little literature has explored the networking problems...
Book
This book constitutes the proceedings of the 7th International Conference on Wireless and Satellite Services, WiSATS 2015, held in Bradford, UK, in July 2015. The conference was formerly known as the International Conference on Personal Satellite Services (PSATS) mainly covering topics in the satellite domain. As the scope of the conference widened...
Conference Paper
Full-text available
This paper explores the network design implications to be taken into account in Smart Gateway Diversity (SGD) satellite systems, where gateway outage events have to be counteracted by efficient handover procedures. In more detail, enabling high data-rate satellite systems in these conditions requires efficient coordination strategies between gatewa...
Conference Paper
Full-text available
Nowadays, there is a significant interest towards evolved cellular systems to support the steady increase in capacity needs. This paper deals with 4G Long Term Evolution (LTE), comparing two reuse schemes that belong to the family of Fractional Frequency Reuse (FFR), where the cell is divided into two parts (i.e., a central part and an edge one) ad...
Conference Paper
Full-text available
Next-generation satellite systems are expected to provide an overall capacity of Tbit/s, whereby the use of higher frequency bands (e.g., Q, V, or W) will be required. In this regard, the satellite network will implement gateway (GW) diversity schemes and handover techniques to cope with the cases where GW feeder links experience outage due to weat...
Book
Full-text available
This book provides a basic description of current networking technologies and protocols as well as important tools for network performance analysis based on queuing theory. The second edition adds selected contents in the first part of the book for what concerns: (i) the token bucket regulator and traffic shaping issues; (ii) the TCP protocol conge...
Chapter
Full-text available
Future 4G cellular systems will address the need for capacity increase for the support of diverse services. It is therefore of fundamental importance to design innovative 4G cellular systems able to support the increase in the traffic demand. This Chapter deals with LTE systems and the design of a new reuse scheme, called Soft Frequency Reuse (SFR)...
Chapter
Before focusing our interest on telecommunication networks, it is important to take a brief look at the history of telecommunications, referring to the most important steps, which are at the basis of modern transmissions of signals at distance.
Chapter
Traditional networks make use of point-to-point links, i.e., channels, which are dedicated to couples of nodes. There is no interference among these channels: the transmission between a pair of (source/destination) nodes has no effect on the transmission between another pair of nodes. However, point-to-point links require the topology to be fixed,...
Chapter
Probability theory deals with the study of random events [1, 2]. Referring to an experiment (e.g., the measure of a quantity, the transmission of a bit or of a packet in a telecommunication system, the toss of a dice, etc.), it can be characterized as:
Chapter
A growing number of people are using the Internet, the network of the networks; this is also evident from the different bandwidth-intensive applications supported by Internet and by the considerable number of Internet books, video, etc. that have become available during these years. The widespread diffusion of social networks (Facebook, YouTube, et...
Chapter
The M/G/1 theory is a powerful tool, generalizing the solution of Markovian queues to the case of general service time distributions. There are many applications of the M/G/1 theory in the field of telecommunications; for instance, it can be used to study the queuing of fixed-size packets to be transmitted on a given link (i.e., M/D/1 case). Moreov...
Chapter
The aim of this Chapter is to survey the first digital networks, which were suitable for transporting data (or, in general, multimedia) traffic [1]. In particular, we will consider the data network based on the X.25 standard [2]. Then, we will focus on the ISDN network and on its special evolution for data transfer, based on the Frame Relay protoco...
Chapter
Telecommunication systems are characterized by the transmission of data on wired or wireless links. In these cases, we have that different “messages” contend for the use of the same transmission resources. Typical examples can be as follows:
Chapter
In Chaps. 5 and 6, we have focused on the study of problems where the analytical models involve the use of a single queue. The interest is now in considering problems where queues exchange traffic as in a network. We can have both open networks of queues, where traffic can be received and sent outside of the network or closed networks, where traffi...
Article
This paper investigates the impact of the Round Trip Propagation Delay (RTPD) in the satellite LTE air interface with the adoption of MIMO technology. The Satellite LTE air interface will provide global coverage and hence complement its terrestrial counterpart in the provision of LTE services to mobile users. A land mobile dual-polarized GEO satell...
Article
This paper investigates the impact of the Round Trip Propagation Delay (RTPD) in the satellite LTE air interface with the adoption of MIMO technology. The Satellite LTE air interface will provide global coverage and hence complement its terrestrial counterpart in the provision of LTE services to mobile users. A land mobile dual-polarized GEO satell...
Book
Full-text available
The aim of this deliverable is to carry out a contextual and critical analysis of Responsible Research and Innovation (RRI) in order to provide a framework for understanding and applying the RRI concept throughout the rest of the RESPONSIBILITY project. Given this aim of a White Paper describing developments and relevance of RRI activity fields, th...
Book
Full-text available
Deliverable 4.1 provides the specification for the “Observatory for International Responsible Research and Innovation Coordination”. Its purpose is to enable the implementation of the Observatory in task 4.2. Therefore the technical as well as procedural requirements and prerequisites for the Observatory have been defined in detail. As the Observat...
Book
Full-text available
This document is part one of D6.3 Project Dissemination Dossier which contains the most important dissemination material created in the 1st project period such as project borchures, leaflets and folders. Furthermore, the project press release as well as significant press articles/news are also to be found in this document, as they are published on...
Article
This book provides a basic description of current networking technologies and protocols as well as important tools for network performance analysis based on queuing theory. The second edition adds selected contents in the first part of the book for what concerns: (i) the token bucket regulator and traffic shaping issues; (ii) the TCP protocol conge...
Conference Paper
Full-text available
Future 4G cellular systems will address the need of capacity increase for the support of diverse Internet services. This article deals with cell capacity issues and cell planning for LTE technology. The Soft Frequency Reuse (SFR) scheme is considered here as an interesting approach to efficiently utilize the bandwidth in LTE systems. With SFR, a ce...
Conference Paper
Full-text available
This paper proposes the use of network coding in handover strategies applied in Smart Gateway Diversity (SGD) architectures, in order to mitigate information losses usually experienced by traditional handover techniques. The focus is actually about the benefit resulting from network coding application in terms of improved transmission robustness at...
Conference Paper
This paper proposes a new packet scheduling algorithm for a satellite Long Term Evolution (LTE) network which adopts MIMO technology. The Satellite LTE air interface will provide global coverage and hence complement its terrestrial counterpart in the provision of mobile services to users across the globe. A packet scheduling algorithm is very cruci...
Conference Paper
Full-text available
This work aims at introducing two novel packet retransmission techniques for reliable multicast in the framework of Instantly Decodable Network Coding (IDNC). These methods are suitable for order- and delay-sensitive applications, where some information is of high importance for an earlier gain at the receiver's side. We introduce hence an Unequal...
Article
Broadband wireless systems are becoming very popular today and several networks and technologies are available. The focus is here on radio resources of OFDM(A)-based air interfaces, such as WiMAX and LTE. A preliminary investigation has permitted to highlight what a ‘resource’ means. Then, this paper compares different analytical frameworks (for ca...
Article
Full-text available
This paper presents a performance analysis of Worldwide Interoperability for Microwave Access (WiMAX) contention-based access under nonsaturated conditions, taking different protocol parameters into account. We model the system by considering both the queuing of packets at subscriber stations and the queuing of bandwidth requests at the base statio...
Conference Paper
Future broadband wireless systems will address the need of capacity increase and support diverse Internet services. This paper deals with performance analysis that can be applied to OFDM(A)-based wireless system. Focusing on WiMAX technologies, two different analytical approaches are compared with simulation results. Then, a mean IP packet delay an...
Conference Paper
Research and Development in a peculiar field such as Satellite Communications (as well as Space science/technology in general) is known to be the ideal stage both for large, transnational companies with the functions of large integrators and system/service providers, and for Small-Medium Enterprises (SMEs) specialized in vertical technologies and/o...