Davide Careglio

Davide Careglio
Universitat Politècnica de Catalunya | UPC · Department of Computer Architecture (DAC)

PhD

About

201
Publications
38,703
Reads
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2,462
Citations
Additional affiliations
January 1999 - present
Universitat Politècnica de Catalunya
Position
  • Professor (Associate)
Education
September 1997 - July 2000
Universitat Politècnica de Catalunya
Field of study
  • Telecommunications Engineering
September 1993 - March 2001
Politecnico di Torino
Field of study
  • Electronic Engineering

Publications

Publications (201)
Conference Paper
A ML function orchestrator deploying secure ML pipelines to support near-real-time control of network services is demonstrated. A distributed ledger supports the initial key exchange to establish secure connectivity among the agents in the pipeline.
Book
Full-text available
The Booklet is an essay defining the HEDY position on life in the AI era and the rational for that position. In this work, we describe and present the results of our twofold approach to build our rational about the challenges, opportunities and expected impact of AI on four areas: business, governance, skill & competencies, and people & lifestyle....
Conference Paper
Full-text available
HEDY-Life in the AI era is a 2-year Erasmus+ project started in November 2021 targeting higher education audience. Its goal is to offer a comprehensive and shared view of how Artificial Intelligence (AI) is affecting our lives and reshaping our socioeconomic, cultural, and human environments and to define which topics related to AI are of interest...
Article
In this special issue devoted to the memory of Prof. Fabio Neri we would like to look back at the time of the international research projects where some of us collaborated with him. On the basis of our personal experience of the time and the current viewpoint, we will discuss why Optical Packet Switching is a technology that never came to market in...
Article
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Leaving the current 4th generation of mobile communications behind, 5G will represent a disruptive paradigm shift integrating 5G Radio Access Networks (RANs), ultra-high-capacity access/metro/core optical networks, and intra-datacentre (DC) network and computational resources into a single converged 5G network infrastructure. The present paper over...
Article
Full-text available
With the globalisation of the multimedia entertainment industry and the popularity of streaming and content services, multicast routing is (re-)gaining interest as a bandwidth saving technique. In the 1990’s, multicast routing received a great deal of attention from the research community; nevertheless, its main problems still remain mostly unaddre...
Article
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Today, applications can be instantiated in a number of data centers located in different segments of the network, from the core to the edge [...]
Article
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Wireless Sensor Networks (WSN) have lately been gaining momentum thanks to the hardware improvements and standardization software efforts. Moreover, the appearance of Internet of Things (IoT) and its reliance on sensors are helping to widely extend the usage of WSNs. However, such networks present drawbacks, mainly because of limited sensor batteri...
Article
Full-text available
Looking at the ever-increasing amount of heterogeneous distributed applications supported on current data transport networks, it seems evident that best-effort packet delivery falls short to supply their actual needs. Multiple approaches to Quality of Service (QoS) differentiation have been proposed over the years, but their usage has always been h...
Article
The incremented popularity of Internet of Things (IoT), thanks to improvements both in hardware and software of sensors over the last years, enables the possibility to monitor and gather any kind of data. Additionally, the arrangement of heterogeneous sensors, capable of perceiving information about their surroundings, into a rich Wireless Sensor N...
Article
Given the current expansion of cloud computing, the expected advent of the Internet of Things, and the requirements of future fifth-generation network infrastructures, significantly larger pools of computational and storage resources will soon be required. This emphasizes the need for more scalable data centers that are capable of providing such an...
Thesis
Full-text available
The technological improvements in hardware and extensive standardization efforts in software development allow Wireless Sensor Networks (WSN) to be employed more widely and extend its application areas. The main challenge of the WSN studied in the literature is achieving the longest node lifetime given the limited battery capacities of the nodes. H...
Article
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A wide range of social, technological and communication systems can be described as complex networks. Scale-free networks are one of the well known classes of complex networks in which nodes’ degrees follow a power-law distribution. The design of scalable, adaptive and resilient routing schemes in such networks is very challenging. In this article...
Article
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Elastic optical networking (EON) is a viable solution to meet future dynamic capacity requirements of Internet service provider and inter-datacenter networks. At the core of EON, wavelength selective switches (WSSs) are applied to individually route optical circuits, while assigning an arbitrary bandwidth to each circuit. Critically, the WSS contro...
Conference Paper
With the proliferation of cloud computing and the expected requirements of future Internet of Things (IoT) and 5G network scenarios, more efficient and scalable Data Centers (DCs) will be required, offering very large pools of computational resources and storage capacity cost-effectively. Looking at todays’ commercial DCs, they tend to rely on well...
Conference Paper
The ICT eco-system is constantly growing in traffic demands, with emerging cloud services, mobile and social network technologies to be integrated in 5G networks. New architectural changes at the underlying networks are required to support the traffic volume growth, while providing a high level of dynamic connectivity so that applications are const...
Article
Full-text available
In this work, we address the problem of jointly deciding the placement of the contents delivered by a Content Distribution Network (CDN) among the available data centers, together with the allocation of the lightpaths required to serve the anycast demands initiated by the CDN network users, assuming an underlying high-capacity Elastic Optical Netwo...
Article
In this paper, we describe the basics of the Recursive InterNetwork Architecture (RINA) and its advantages as a packet transport technology over programmable optical networks. In particular, its seamless integration over an SDN-controlled network infrastructure and its intrinsic capability of providing QoS is analysed and further discussed.
Article
Flexgrid Optical Networks provide higher spectrum efficiency and flexibility in comparison to traditional wavelength switched optical networks (WSON) due to the finer granularity in managing communication channels at the WDM layer, thus allowing beyond 100 Gbps transmission capabilities. They also promise allocating part of the traffic aggregation...
Article
In modern optical networks, infrastructure management is faced with the challenge of using expensive equipment and communication resources as efficiently as possible. This now includes keeping power consumption costs at a minimum and using the available optical links in a balanced way, in addition to the traditional goals of providing the best poss...
Article
In the last years, the power consumption of telecommunication networks has attracted the attention of both researchers and field experts in order to contain the associated energy bills and reduce their ecological impact. Many of the proposed solutions have been focused exclusively on the reduction of the power consumption, without adequately consid...
Chapter
Full-text available
This chapter provides the summary and references on existing and future leverages to adapt the underlying hardware infrastructures of large-scale distributed computing systems in order to decrease their energy consumption. It is intended to be used by researchers, as well as companies and general public, to drive their research fostering activities...
Article
Elastic optical networks have emerged as a promising technology for the efficient use of optical network resources. Its adaptable characteristics and adjustable data rate enable operators to meet the diverse granularity of their clients needs. In order to automate an elastic optical network operation, a control plane is required. Wavelength Switche...
Conference Paper
Full-text available
Recently proposed Elastic Optical Networks (EON) provide optimized bandwidth utilization through a better fitting match between connection bandwidth requirements and spectrum occupation. In an EON, lightpaths are established using a Routing and Spectrum Assignment (RSA) algorithm. Nonetheless, a novel problem arises in EON, known as the fragmentati...
Conference Paper
Current over-provisioned and multi-tier data centre networks (DCN) deploy rigid control and management platforms, which are not able to accommodate the ever-growing workload driven by the increasing demand of high-performance data centre (DC) and cloud applications. In response to this, the EC FP7 project LIGHTNESS (Low Latency and High Throughput...
Article
Full-text available
Rigid fixed-grid WDM optical networks can no longer keep up with the emerging bandwidth-hungry and highly dynamic services in an efficient manner. As the available spec-trum in optical fibers becomes occupied and is approaching fun-damental limits, the research community has focused on seeking more advanced optical transmission and networking solut...
Conference Paper
Current Internet traffic comprises diverse service requirements. Service providers differentiate connections characteristics according to demand's requirements and pricing policy. In this paper we propose a differentiated service methodology that implements constrained resources allocation according to demand's priority level for WDM networks. With...
Conference Paper
Originally defined in the 90s, multicast is nowadays (re)gaining interest given the increasing popularity of multimedia streaming/content traffic and the explosion of cloud services. In fact, multicast yields bandwidth savings complementing cached content distribution techniques and its potential benefits have been verified by studies several times...
Conference Paper
In this paper, we report our development experience and experimentation studies of two multicast routing schemes for the Internet, namely, PIM-SSM and GCMR. We detail their implementation over the Quagga open source routing suite, as well as their experimentation tests over a large-scale topology that reproduces the Internet characteristics.
Article
Despite the significant degree of technological maturity reached by large-scale optical transmission infrastructures, new critical issues are emerging as side effects associated to their energy consumption, environmental impact and related costs, now accounting for an important part of the networks’ operational expenditures. To face this problem, w...
Conference Paper
Full-text available
This paper provides a theoretical performance analysis of different classes of multicast routing algorithms, namely the Shortest Path Tree, the Steiner Tree, compact routing and greedy routing. Our motivation is to determine the routing scheme which would yield the best trade-off between the stretch of the multicast routing paths, the memory space...
Article
It is quite easy to foresee that in the next years, the future generation ultra-high speed network infrastructures and equipments will be no longer constrained only by their pure transport capacity, but also by their energy consumption costs and environmental effects. In particular, large network infrastructures are now widely recognized to play a...
Article
In this paper we deal with the survivable internet protocol (IP)/multi-protocol label switching (MPLS)-over-wavelength switched optical network (WSON) multi-layer network optimization problem (SIMNO). This problem entails planning an IP/MPLS network layer over a photonic mesh infrastructure whilst, at the same time, ensuring the highest availabilit...
Article
Full-text available
Applications running inside data centers are enabled through the cooperation of thousands of servers arranged in racks and interconnected together through the data center network. Current DCN architectures based on electronic devices are neither scalable to face the massive growth of DCs, nor flexible enough to efficiently and cost-effectively supp...
Conference Paper
Full-text available
Confronted to the increasing dynamic of Internet routing system and its underlying topology, we propose a reliability and availability analysis method based on the characterization of the dynamic properties (in particular, the stability properties) of routing paths and their corresponding forwarding paths. The key driver underlying this method is t...
Conference Paper
Full-text available
Recently, Spectrum Switched Optical Networks (SSON) have been receiving much interest from the research community due to their network performance benefits. Some of these benefits include the possibility of enabling either super channels or sub-wavelength channels, which meet better the granularity of Internet needs. Due to its specific routing and...
Conference Paper
In this paper we present EnergySave, a smart energy-saving system that, by leveraging the consolidated WoL (Wake on LAN) technology, allows the remote wake-up of PCs from a centralized management server, providing easy and secure power management capabilities for local or remote IP-based networks of personal computers (PCs). We also present a light...
Conference Paper
Full-text available
In the last years, the research efforts in smart grids (SG) and telecommunication networks (TN) have been considerable but never converged to a common view and, due to the lack of strong interactions between the two worlds, only limited benefits have been achieved. We envision in this paper that future TN (as well as any other ICT application) will...
Article
Physical layer impairments severely limit the reach and capacity of optical systems, thereby hampering the deployment of transparent optical networks (i.e., no electrical signal regenerators are required). Besides, the high cost and power-consumption of regeneration devices makes it unaffordable for network operators to consider the opaque architec...
Conference Paper
Full-text available
Analysis of real datasets to characterize the local stability properties of the Internet routing paths suggests that extending the route selection criteria to account for such property would not increase the routing path length. Nevertheless, even if selecting a more stable routing path could be considered as valuable from a routing perspective, it...
Article
Full-text available
On-line communication services were evolving from a simple text-based chats towards sophisticated videopresence appliances. The bandwidth consumption of those services is constantly growing due to the technology development and high user and business needs. That fact leads us to imple-ment optimization mechanisms into the multimedia commu-nication...
Article
Full-text available
Translucent optical networks have emerged as potential yet feasible candidates to bridge the gap between the opaque and transparent network architectures. By allowing electrical 3R signal regeneration only at selected points in the network, translucent architectures represent a cost-effective, power-efficient solution. Concurrently, forecasts predi...
Article
Full-text available
Elastic flexgrid optical networks (FG-ON) are considered a very promising solution for next-generation optical networks. In this article we focus on lightpath adaptation under variable traffic demands in FG-ON. Specifically, we explore the elastic spectrum allocation (SA) capability of FG-ON and, in this context, we study the effectiveness of three...
Chapter
Full-text available
Aiming at creating a dynamic between elaboration, realization, and validation by means of iterative cycles of experimentation, Future Internet Research and Experimentation (FIRE) projects have been rapidly confronted to the lack of systematic experimental research methodology. Moreover, the “validation by experimentation” objective involves a broad...
Chapter
In this chapter we summarize the main outcomes of this book, and provide lessons learned, best practices and key recommendations on experimental-based measurement and associated tools.
Chapter
Full-text available
Following the iterative research cycle process, this chapter elaborates a methodology and documents the steps followed for the design of a dynamic multicast routing algorithm, referred to as Greedy Compact Multicast Routing. Starting from the design of the dynamic multicast routing algorithm, we then evaluate by simulation on large-scale topologies...
Chapter
Full-text available
Research on new network and service architectures for the Internet includes many different aspects, from new applications to new network protocols, control models and procedures but also faster and more reliable network technologies. In order to validate scientific results, these new paradigms should be evaluated through experiments carried out at...
Book
This book constitutes the outcome of the Workshop on Measurement and Measurement Tools which was held as part of the Future Internet Research Experimentation (FIRE) initiative during the Future Internet Assembly conference (FIA) in May 2012. The 10 contributions included in this volume are invited extended versions of the presentations at the works...
Conference Paper
The existing dimensioning strategy for translucent, sub-wavelength switching architectures relies on over-provisioning, and consequently, overuse of costly, power-consuming optical-electrical-optical (O/E/O) regenerators. In addition, due to a variety of external phenomena, many physical layer impairments are time-varying, and hence, can strongly d...
Conference Paper
Full-text available
Information flow in nowadays networks spreads in the exponential way. This fact is caused by the intensive changes in the Internet communication paradigms. Transmission in the Internet evolved from the simple one-to-one communication to the more sophisticated data exchange methods. In this paper, the authors concentrate on many-to-many (m2m) commun...
Article
Full-text available
In this paper, we report the results of the workshop organized by the FP7 EULER project on measurement-based research and associated methodology, experiments and tools. This workshop aimed at gathering all Future Internet Research and Experimentation (FIRE) experimental research projects under this thematic. Participants were invited to present the...
Article
Future flexible-grid elastic optical networks are very promising due to their higher spectrum efficiency and flexibility comparing to the rigid spectrum grid optical networks realized with the traditional wavelength division multiplexing (WDM) technology. The maturity of key system components enabling flexgrid optical networks, such as advanced mod...
Article
Full-text available
Dynamic optical networking allows operators to effectively maximize the capacity of their physical infrastructure and cope with the rapid growth rates of the Internet traffic. In the framework of the European DICONET project we proposed and developed a comprehensive solution that utilizes the dynamicity as well as the valuable physical layer inform...
Article
Full-text available
The ever-increasing Internet Protocol (IP) traffic volume has finally brought to light the high inefficiency of current wavelength-routed over rigid-grid optical networks in matching the client layer requirements. Such an issue results in the deployment of large-size, expensive, and power-consuming IP/Multi-Protocol Label Switching (MPLS) layers to...
Thesis
Full-text available
We started our work aiming to solve interdomain scalability problems facing by current routing scheme. For this, we did research in some of the advanced routing schemes which may provide the solution of problems facing by the Internet. The proposed algorithm is the modification in Thorup and Zwick Compact routing scheme by reducing the routing tabl...
Chapter
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This paper proposes extensions to the OSPF-TE protocol to enable green routing in GMPLS-controlled optical networks. Simulation results show a remarkable reduction in CO2 emissions by preferring network elements powered by green energy sources in the connection routing.
Chapter
Full-text available
In this paper, routing optimizations based on energy sources are proposed in dynamic GMPLS controlled optical networks. The influences of re-routing and load balancing factors on the algorithm are evaluated, with a focus on different re-routing thresholds. Results from dynamic network simulations show that re-routing strategies can lower CO2 emissi...
Conference Paper
Full-text available
The ever increasing IP traffic volume has finally brought to light the high inefficiency of current wavelength-routed rigid-grid networks in matching the client layer requirements. Such an issue results in the deployment of large-size, expensive and power-consuming IP/MPLS layers to perform the required grooming/aggregation functionality. To deal w...
Conference Paper
The virtual circuit characteristic of MPLS and GMPLS architectures has enabled the implement of Traffic Engineering (TE) and Differentiated Services (Diff-Serv) profile to networks. Both schemes are possible by the application of preemption policies and priority of path assignment. With the advent of Path Computation Element (PCE) the routing task...
Article
Network operators are willing to provide a range of services in the hope of maximizing their profits: from the highly available connectivity services for key business customers to the unprotected or even best effort services for residential customers. These services are being provided through IP/multiprotocol label switching (MPLS) over wavelength-...
Conference Paper
New services like Video on demand/Internet Protocol Television, Voice over IP and high speed Internet access demand very high bandwidth to provide Triple Play services to the customers. The ADSL/ADLS2+ and the VDSL/VDSL2 copperwire technologies deteriorate quickly with the distance and will be soon obsolete for supporting the ultra-high bandwidth r...