Alessandro Carrega

Alessandro Carrega
Università degli Studi di Genova | UNIGE · Dipartimento di Ingegneria Navale, Elettrica, Elettronica e delle Telecomunicazioni (DITEN)

Ph.D. Software & Network Engineer

About

44
Publications
3,403
Reads
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452
Citations
Citations since 2016
33 Research Items
336 Citations
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Introduction
Ph.D. Alessandro (aka Alex) Carrega is a Software and Network Engineer. He is currently a Post Ph.D. Research Fellow at the Telecommunication Networks and Telematics (TNT) Lab. in Genoa, Italy. TNT is a joint research laboratory between Department of Electrical, Electronic and Telecommunications Engineering, and Naval Architecture (DITEN) at the University of Genoa, and the National Inter-University Consortium for Telecommunications (CNIT).
Additional affiliations
October 2011 - March 2012
Portland State University
Position
  • PhD Student
June 2005 - September 2005
German Aerospace Center (DLR)
Position
  • Researcher

Publications

Publications (44)
Chapter
Full-text available
With the progressive implementation of digital services over virtualized infrastructures and smart devices, the inspection of network traffic becomes more challenging than ever, because of the difficulty to run legacy cybersecurity tools in novel cloud models and computing paradigms. The main issues concern i ) the portability of the service across...
Chapter
Full-text available
Modern computing paradigms (i.e., cloud, edge, Internet of Things) and ubiquitous connectivity have brought the notion of pervasive computing to an unforeseeable level, which boosts service-oriented architectures and microservices patterns to create digital services with data-centric models. However, the resulting agility in service creation and ma...
Article
Full-text available
The combination of virtualization techniques with capillary computing and storage resources allows the instantiation of Virtual Network Functions throughout the network infrastructure, which brings more agility in the development and operation of network services. Beside forwarding and routing, this can be also used for additional functions, e.g.,...
Article
Full-text available
Today, the digital economy is pushing new business models, based on the creation of value chains for data processing, through the interconnection of processes, products, services, software, and things across different domains and organizations. Despite the growing availability of communication infrastructures, computing paradigms, and software arch...
Conference Paper
Today's networks and services undoubtedly require a high level of protection from cyber threats and attacks. State-of-the-art solutions that implement Machine Learning (ML) have shown to improve the accuracy and confidence in threat detection compared to previous approaches, making it suitable for detecting today's sophisticated attacks such as Dis...
Article
Evolving business models are progressively pushing for increasing digitalization of existing and novel processes. The ICT industry is already addressing this need by massive introduction of virtualization paradigms and tight integration with the physical environment, which allow the creation of multi-domain and complex business service chains. Emer...
Chapter
The emerging trend in network softwarization has led to a programmable networking architecture that improves the traditional control of network systems from hardware-based configurations to a fully-softwarized approach. The benefits from this transition are numerous; however, the impact on network security aspects may turn out to be negative, unles...
Article
Efficient usage of IT equipment in Data Centers requires modulating their power-consumption according to the actual workload. The most effective strategy to this aim consists in consolidating as many applications as possible on the smallest number of servers, so that idle devices can be shut down or put in low-power states. Usually, this process is...
Conference Paper
Full-text available
The introduction of new computing and networking paradigms, which leverage vir-tualization and service-oriented architectures, has brought far more agility than ever in the creation and concatenation of digital services. Yet it raises new security and privacy concerns that cannot be properly tackled by existing tools and models. In this paper, we b...
Conference Paper
In last years, the security appliance is becoming a more important and critical challenge considering the growing complexity and diversification of cyber-attacks. The current solutions are often too cumbersome to be run in virtual services and Internet of Things (IoT) devices. Therefore, it is necessary to evolve to a more cooperative models, which...
Article
Full-text available
With the rise of edge computing paradigms, multimedia applications will have to tackle unprecedented management issues, pursuing an optimal balance between performance, Quality of Service (QoS), and power consumption. In this paper, we investigate a novel paradigm to deploy multimedia elastic applications at the edge in a very energy-efficient mann...
Article
In this paper, we describe a novel paradigm to pre-provision virtual machines (VMs) in an energy-efficient manner for cloud elastic applications. Our approach is based on the definition of dynamic context for VMs, which can be easily updated by software orchestration tools. We show the feasibility of our approach and improvement over existing state...
Conference Paper
Power management and load balancing in data centers are becoming critical with the growing size of the infrastructure. In front of an increasing number of cloud networks, virtual machines (VMs) and containers, smart management and control decisions are required, in order to instantiate or mobilize these virtual components. As regards reducing power...
Article
Full-text available
Edge computing is an effective paradigm for proximity in computation, but must inexorably face mobility issues and traffic fluctuations. While software orchestration may provide effective service handover between different edge infrastructures, seamless operation with negligible service disruption necessarily requires pre-provisioning and the need...
Article
The advent of fifth generation is promising to push far more intelligence than today to the network boundary, hence boosting novel computing models based on fog/edge paradigms. The need for proximity in computation, coupled with various forms of mobility, will be responsible for dynamic shifting of workload within the system, with large fluctuation...
Article
Presents corrections to the paper, “Green networking with packet processing engines: Modeling and optimization,” (Bolla, R., et al), IEEE/ACM Trans. Netw., vol. 22, no. 1, pp. 110–123, Feb. 2014.
Conference Paper
The consolidation of resources is one of the most efficient strategies to reduce the power consumption in data centers. Various algorithms have been proposed in order to reduce the total number of required servers and network devices. The practice developed in response to the problem of server sprawl, a situation in which multiple, under-utilized s...
Article
Telecom operators have recently started to deploy massive computing and storage resources at the very edge of their access networks, hence evolving their infrastructures into large, distributed, and capillary computing environments, capable of placing applications very close to users and terminals and well-suited to effectively fulfill the challeng...
Conference Paper
The growing interest in distributed, context-aware and data-sensitive applications is pushing the evolution of computing infrastructures from centralized to distributed models, which could effectively tackle the execution of complex software frameworks over geographical scale. The concept of cloud continuum that extends computing infrastructures be...
Conference Paper
The application of effective energy management strategies in data centers is often hindered by the substantial conflict between the interests of cloud users and infrastructure owners. As a matter of fact, cloud users require that the service level they are paying for is tightly met, whereas data center owners try to cut down their operational expen...
Article
Full-text available
Network Functions Virtualization (NFV) is a network architecture concept where network functionality is virtualized and separated into multiple building blocks that may connect or be chained together to implement the required services. The main advantages consist of an increase in network flexibility and scalability. Indeed, each part of the servic...
Chapter
The continuing increase in demand for online and cloud services as well as the development of new more resource-intensive applications poses a significant challenge to the network infrastructure. The resulting rise in energy costs and ecological considerations have made it apparent that a future network infrastructure needs to be as energy efficien...
Article
With the aim of controlling power consumption in metro/transport and core networks, we consider energy-aware devices able to reduce their energy requirements by adapting their performance. In particular, we focus on state-of-the-art packet processing engines, which generally represent the most energy-consuming components of network devices, and whi...
Article
We propose an analytical model able to accurately estimate both power consumption and network performance indexes of Energy Efficient Ethernet (EEE) links working at the three available speeds under various traffic load patterns and packet size distributions. The model is sufficiently flexible and accurate to consider different traffic parameters;...
Article
The energy consumption of the Information and Communication Technology (ICT) sector has been increasing recently; this sector is estimated to account for 2% of the total energy consumption. An even more aggressively increasing trend is the volume of Internet traffic and the number of connected devices. Thus, reducing the energy needs of the Interne...
Conference Paper
Full-text available
The problem of reducing energy usage in datacenter networks is an important one. However, we would like to achieve this goal without compromising throughput and loss characteristics of these networks. Studies have shown that data-center networks typically see loads of between 5% -- 25% but the energy draw of these networks is equal to operating the...
Conference Paper
Full-text available
Numerous studies have shown that datacenter networks typically see loads of between 5% - 25% but the energy draw of these networks is equal to operating them at maximum load. In this paper, we propose a novel way to make these networks more energy proportional - that is, the energy draw scales with the network load. We propose the idea of traffic a...
Conference Paper
Full-text available
In this contribution, we focus on energy-aware devices able to reduce their energy requirements by adapting their performance. We propose an analytical model to accurately represent the impact of green network technologies (i.e., low power idle and adaptive rate) on network- and energy-aware performance indexes. The model has been validated with ex...
Conference Paper
Full-text available
In this paper, we focus on energy-aware devices able to reduce their energy requirements by adapting their performance. We consider the device to be able to save energy through two main energy-aware primitives, namely, low power idle and power scaling. In such an environment, we propose a novel and original model for accurately representing how the...
Conference Paper
The largest part of routers and switches, today deployed in production networks, has very limited energy saving capabilities, and substantially requires the same amount of energy both when working at full speed or when being idle. In order to dynamically adapt such energy requirements to the real device work load, current approaches foster the intr...
Article
Full-text available
The largest part of routers and switches, today deployed in production networks, has very limited energy saving capabilities, and substantially requires the same amount of energy both when working at full speed or when being idle. In order to dynamically adapt such energy requirements to the real device work load, current approaches foster the intr...
Article
Due to the continuous growth of customer population, the spreading of broadband access, the increase in energy price, and the expanding number of services being offered by telecoms and providers, energy efficiency issue has become a high-priority objective for wired networks and services infrastructures. Current network devices are well-known to be...

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The project aims to develop an open and extensible platform for advanced assurance and protection of trustworthy and reliable business chains spanning multiple administrative domains and heterogeneous infrastructures.
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