Giorgio Nunzi - Academia.edu (original) (raw)
Papers by Giorgio Nunzi
document has been produced in the context of the 4WARD Project. The research leading to these res... more document has been produced in the context of the 4WARD Project. The research leading to these results has received funding from the European Community's Seventh Framework Programme ([FP7/2007-2013] [FP7/2007-2011]) under grant agreement n ° 216041 All information in this document is provided "as is " and no guarantee or warranty is given that the information is fit for any particular purpose. The user thereof uses the information at its sole risk and liability. For the avoidance of all doubts, the European Commission has no liability in respect of this document, which is merely representing the authors view.
2004 Workshop on High Performance Switching and Routing, 2004. HPSR., 2004
Abstract The concept of generalized multi-protocol label switching (GMPLS) is an emerging control... more Abstract The concept of generalized multi-protocol label switching (GMPLS) is an emerging control technology applied on different types of networks. It uses the same IP control plane (signaling and routing) in packet-based, TDM, as well as in optical switched networks. In ...
2007 10th IFIP/IEEE International Symposium on Integrated Network Management, 2007
Self-configuration is regarded a key instrument to increase the efficiency of many management tas... more Self-configuration is regarded a key instrument to increase the efficiency of many management tasks. This work proposes and investigates the application of self-configuring mechanisms to decentralized network management in wireless networks. In particular, the load balancing function has been recently investigated and in this work we consider a distributed algorithm that can be executed autonomously by each Access Point. The contribution of this work, besides the definition of the algorithm, consists in an extensive evaluation of its performance. In particular, we study how the main issues in distributed selfconfiguring applications (namely stability, convergence, and overhead) can be controlled. I.
2007 16th IST Mobile and Wireless Communications Summit, 2007
Traditional centralized management approaches are not suitable for Ambient Networks (ANs), since ... more Traditional centralized management approaches are not suitable for Ambient Networks (ANs), since centralized management systems neither scales well nor adapts fast enough to changing topologies and network compositions. To meet the requirements for AN management systems, we propose the use of distributed approaches. Specifically, we demonstrate the validity of these approaches through three instantiations: (i) a solution for real-time AN
2010 IEEE Network Operations and Management Symposium - NOMS 2010, 2010
... Clarissa C. Marquezan and Lisandro Z. Granville Institute of Informatics - UFRGS Porto Alegre... more ... Clarissa C. Marquezan and Lisandro Z. Granville Institute of Informatics - UFRGS Porto Alegre, RS, Brazil Email: {clarissa,granville}@inf ... CPU, memory, storages, and device interfaces [2]. Virtual networks multiplex physical links and build paths connecting edge customers [3]. In ...
International Journal of Network Management, 2011
Future Internet, inherent traffic and network management as well as the corresponding business as... more Future Internet, inherent traffic and network management as well as the corresponding business aspects are topics of intensive research activity. The combination of those areas is a main focus of Inherent Network Management (INM) as a management framework based on distributed, self-organizing and autonomous approaches to address new challenges in a trend towards heterogeneous and dynamic future networking environments. We describe the INM design and behaviors especially with regard to advanced monitoring and fast failure response to enable more flexibility in traffic engineering, in order to improve the control and utilization of bandwidth and other network resources. We analyze a case study on the process of upgrading the links in broadband access networks, as a steadily ongoing planning procedure in operational fixed and mobile networks to keep pace with rapidly growing user demand and Internet traffic. Full mesh topologies are considered as a relevant core network structure that allows for an explicit analytical comparison of the resource and cost efficiency with and without optimized load balancing. The results indicate that flexible path design with INM support can increase the admissible throughput or, vice versa, reduce part of the over-provisioning of routing and transmission capacity with corresponding savings in capital expenditure as well as for operational expenditure due to reduced energy consumption.
2009 IFIP/IEEE International Symposium on Integrated Network Management-Workshops, 2009
AbstractWe present ways for user-assisted coverage configu-ration and interference optimization.... more AbstractWe present ways for user-assisted coverage configu-ration and interference optimization. The femtocell coverage is measured in a user-assisted site survey, followed by an automatized evaluation and femtocell configuration adjustment. To achieve this, the ...
2006 IEEE/IFIP Network Operations and Management Symposium NOMS 2006, 2006
Self-configuration is a promising approach in Network Management. A self-configuring node is able... more Self-configuration is a promising approach in Network Management. A self-configuring node is able to change some of its parameters autonomously according to changes of the environment (change of network conditions or information delivered from neighbour nodes). A network ...
Managing Large-Scale Service Deployment, 2008
Monitoring is essential in modern network management. However, current monitoring systems are una... more Monitoring is essential in modern network management. However, current monitoring systems are unable to recover their internal faulty entities forcing the network administrator to manually fix the occasionally broken monitoring solution. In this paper we address this issue by introducing a self-healing monitoring solution. This solution is described considering a scenario of a monitoring system for a Network Access Control (NAC) installation. The proposed solution combines the availability provided by P2P-based overlays with self-healing abilities. This paper also describes a set of experimental evaluations whose results present the tradeoff between the time required to recover the monitoring infrastructure when failures occur, and the associated bandwidth consumed in this process. Based on the experiments we show that it is possible to improve availability and robustness with minimum human intervention.
2009 IFIP/IEEE International Symposium on Integrated Network Management, 2009
Known by the acronym "ISINM" prior to 1997, this biennial symposium series has earned a worldwide... more Known by the acronym "ISINM" prior to 1997, this biennial symposium series has earned a worldwide reputation as the leading event in the field of network and distributed systems management. Since 1989, it has provided a technical forum for the research, standards, development, systems integrator, vendors, and user communities. Each IM has a general theme that aims to capture the essence of what was most important in integrated network management at a particular time. This year's theme is "Making Management Scalable, Robust, Cost-Effective, and Revenue-Generating." The growth in the size and complexity of information processing systems has continued at the same time that reliance on their operations has increased. Management is critical to maintaining the utility of these interconnected systems, and it has to be effective from a business perspective as well. You will see such factors addressed in many of the symposium presentations. The Organizing Committee of IM 2009 has put together an outstanding program. There will be 41 papers presented in the 13 sessions of the main conference, with a very selective acceptance rate of 32.8%. For the first time, IM will also include a Mini-Conference to accommodate a larger number of technical contributions. The associated mini-conference will include 32 papers, presented over its eight sessions. Additionally, there will be two poster sessions that will include 22 poster presentations, and three application sessions where 9 papers will be presented. Continuing a recent trend, IM also has three dissertation digest sessions, where a selected set of seven papers representing the best Ph.D. work in the area of network and service management will be presented. In addition, we will have: six keynote speakers, who are well known leaders in their respective fields; four panel sessions; eight tutorials; and four workshops. The overall program brings together top experts from both industry and academia to provide a wide range of perspectives, practices, and technical expertise. The symposium would not have been possible without the tireless efforts of the entire IM 2009 Organizing Committee. We would like to commend them for their professionalism and commitment. We are most grateful to the authors who submitted their work, which is the basis for the conference. We would also like to thank the technical program committee members, the reviewers who diligently supported the peer review process, the workshop chairs who worked hard to organize the workshops, and everyone else for their time and dedication to put together this remarkable program. We are also extremely grateful to those who are involved in making the local arrangements, designing and building the website, creating the publications and promotional materials, and handling registrations. A special acknowledgement goes to the staff of the IEEE Communications Society who supported us throughout. Last, but far from least, we would like to express our gratitude to the patrons who so generously contributed to the symposium. We are sure you will enjoy Long Island, just a short train ride from New York City, but with a character of its own. Two local events have been arranged to provide an opportunity for you to get together with friends and colleagues. We hope that your symposium experience is an enjoyable one.
2009 IFIP/IEEE International Symposium on Integrated Network Management, 2009
This work proposes a probabilistic management paradigm for solving some major challenges of decen... more This work proposes a probabilistic management paradigm for solving some major challenges of decentralized network management. Specifically, we show how to cope with 1) the overhead of redundant information gathering and processing, 2) the decentralized management in dynamic and unpredictable environments, and 3) the considerable effort required for decentralized coordination of management functions. To this end, we describe a framework for probabilistic decentralized management in the context of In-Network Management (INM). We demonstrate how this framework can be applied to a network of information, a novel clean-slate approach towards an information-centric future Internet. We show by means of a simulation study in the area of performance and fault management that we can significantly reduce the effort and resources dedicated to management, while we are able to achieve a sound level of accuracy of the overall network view.
12th IFIP/IEEE International Symposium on Integrated Network Management (IM 2011) and Workshops, 2011
Abstract-In-network management (INM) is a paradigm for distributed and embedded management for fu... more Abstract-In-network management (INM) is a paradigm for distributed and embedded management for future networks. One of its main design goals is to be used in conjunction with Network-as-a-Service (NaaS)-enabled networks, which need to be managed ...
IEEE Transactions on Network and Service Management, 2004
IEEE Communications Magazine, 2012
In this article, physical layer awareness in access, core, and metro networks is addressed, and a... more In this article, physical layer awareness in access, core, and metro networks is addressed, and a Physical Layer Aware Network Architecture Framework for the Future Internet is presented and discussed, as proposed within the framework of the European ICT Project 4WARD. Current limitations and shortcomings of the Internet architecture are driving research trends at a global scale toward a novel, secure, and flexible architecture. This Future Internet architecture must allow for the coexistence and cooperation of multiple networks on common platforms, through the virtualization of network resources. Possible solutions embrace a full range of technologies, from fiber backbones to wireless access networks. The virtualization of physical networking resources will enhance the possibility of handling different profiles, while providing the impression of mutual isolation. This abstraction strategy implies the use of well elaborated mechanisms in order to deal with channel impairments and requirements, in both wireless (access) and optical (core) environments.
IEEE Transactions on Network and Service Management, 2007
2009 IFIP/IEEE International Symposium on Integrated Network Management, 2009
Abstract. Future communication networks will be composed of a diversity of highly heterogeneous n... more Abstract. Future communication networks will be composed of a diversity of highly heterogeneous network variants, ranging from energy constrained wireless sensor networks to large-scale wide area networks. The fact that the size and complexity of such networks will experience tremendous growth will eventually render existing traditional network management paradigms unfeasible. We propose the radically new paradigm of in-network management, which targets the embedding of self-management capabilities deep inside the network nodes. In this paper, we focus on our framework for in-network management, which allows management logic to be embedded and executed within network nodes. Based on a specific use-case of bio-inspired network management, we demonstrate how our framework can be exploited in a network failure scenario using quorum sensing and chemotaxis.
In-Network Management, INM, is a novel network management concept designed by WP4, in which manag... more In-Network Management, INM, is a novel network management concept designed by WP4, in which management tasks are embedded in the network, while utilizing distributed architecture, self-organization and autonomy. This deliverable evaluates the INM design work recently completed by all WP4 tasks and cross WP activities. It compiles a comprehensive list of requirements collected from the definition of Future Internet scenarios that were described at the beginning of the project, and use it as an evaluation criterion. An adapted V-model is used for the evaluation methodology, with two agreed templates, one for the framework and one for the algorithms. The INM evaluation analysis demonstrates a comprehensive coverage of requirements. INM is shown to be beneficial for all evaluation criteria, NewAPC, VNets, GPs, and NetInf, while realising potential business incentives, when compared with legacy network management systems. As the next step, INM should be experimented with real networks.
The current Internet is indubitably the sum and substance of today's global integrated commun... more The current Internet is indubitably the sum and substance of today's global integrated communications infrastructure and service platform that has harnessed more than a billion users across the world. However, the tremendous impetus of internet-based infrastructures and services has resulted in the conception of a state of affaires that is completely different than what was envisioned when internet's architecture was designed in the 1970s. It is therefore become indispensable to develop the Future Internet that can cope with the emerging demands of in- formation society of tomorrow. An important factor for the successful deployment of Future Internet is to prepare a compelling case to convince the operators that Future Internet will assure business benefits for them. In this paper, we identify key technological challenges that need to be addressed to achieve this goal. This paper consolidates the activities of three research projects and provides valid and experienced design...
document has been produced in the context of the 4WARD Project. The research leading to these res... more document has been produced in the context of the 4WARD Project. The research leading to these results has received funding from the European Community's Seventh Framework Programme ([FP7/2007-2013] [FP7/2007-2011]) under grant agreement n ° 216041 All information in this document is provided "as is " and no guarantee or warranty is given that the information is fit for any particular purpose. The user thereof uses the information at its sole risk and liability. For the avoidance of all doubts, the European Commission has no liability in respect of this document, which is merely representing the authors view.
2004 Workshop on High Performance Switching and Routing, 2004. HPSR., 2004
Abstract The concept of generalized multi-protocol label switching (GMPLS) is an emerging control... more Abstract The concept of generalized multi-protocol label switching (GMPLS) is an emerging control technology applied on different types of networks. It uses the same IP control plane (signaling and routing) in packet-based, TDM, as well as in optical switched networks. In ...
2007 10th IFIP/IEEE International Symposium on Integrated Network Management, 2007
Self-configuration is regarded a key instrument to increase the efficiency of many management tas... more Self-configuration is regarded a key instrument to increase the efficiency of many management tasks. This work proposes and investigates the application of self-configuring mechanisms to decentralized network management in wireless networks. In particular, the load balancing function has been recently investigated and in this work we consider a distributed algorithm that can be executed autonomously by each Access Point. The contribution of this work, besides the definition of the algorithm, consists in an extensive evaluation of its performance. In particular, we study how the main issues in distributed selfconfiguring applications (namely stability, convergence, and overhead) can be controlled. I.
2007 16th IST Mobile and Wireless Communications Summit, 2007
Traditional centralized management approaches are not suitable for Ambient Networks (ANs), since ... more Traditional centralized management approaches are not suitable for Ambient Networks (ANs), since centralized management systems neither scales well nor adapts fast enough to changing topologies and network compositions. To meet the requirements for AN management systems, we propose the use of distributed approaches. Specifically, we demonstrate the validity of these approaches through three instantiations: (i) a solution for real-time AN
2010 IEEE Network Operations and Management Symposium - NOMS 2010, 2010
... Clarissa C. Marquezan and Lisandro Z. Granville Institute of Informatics - UFRGS Porto Alegre... more ... Clarissa C. Marquezan and Lisandro Z. Granville Institute of Informatics - UFRGS Porto Alegre, RS, Brazil Email: {clarissa,granville}@inf ... CPU, memory, storages, and device interfaces [2]. Virtual networks multiplex physical links and build paths connecting edge customers [3]. In ...
International Journal of Network Management, 2011
Future Internet, inherent traffic and network management as well as the corresponding business as... more Future Internet, inherent traffic and network management as well as the corresponding business aspects are topics of intensive research activity. The combination of those areas is a main focus of Inherent Network Management (INM) as a management framework based on distributed, self-organizing and autonomous approaches to address new challenges in a trend towards heterogeneous and dynamic future networking environments. We describe the INM design and behaviors especially with regard to advanced monitoring and fast failure response to enable more flexibility in traffic engineering, in order to improve the control and utilization of bandwidth and other network resources. We analyze a case study on the process of upgrading the links in broadband access networks, as a steadily ongoing planning procedure in operational fixed and mobile networks to keep pace with rapidly growing user demand and Internet traffic. Full mesh topologies are considered as a relevant core network structure that allows for an explicit analytical comparison of the resource and cost efficiency with and without optimized load balancing. The results indicate that flexible path design with INM support can increase the admissible throughput or, vice versa, reduce part of the over-provisioning of routing and transmission capacity with corresponding savings in capital expenditure as well as for operational expenditure due to reduced energy consumption.
2009 IFIP/IEEE International Symposium on Integrated Network Management-Workshops, 2009
AbstractWe present ways for user-assisted coverage configu-ration and interference optimization.... more AbstractWe present ways for user-assisted coverage configu-ration and interference optimization. The femtocell coverage is measured in a user-assisted site survey, followed by an automatized evaluation and femtocell configuration adjustment. To achieve this, the ...
2006 IEEE/IFIP Network Operations and Management Symposium NOMS 2006, 2006
Self-configuration is a promising approach in Network Management. A self-configuring node is able... more Self-configuration is a promising approach in Network Management. A self-configuring node is able to change some of its parameters autonomously according to changes of the environment (change of network conditions or information delivered from neighbour nodes). A network ...
Managing Large-Scale Service Deployment, 2008
Monitoring is essential in modern network management. However, current monitoring systems are una... more Monitoring is essential in modern network management. However, current monitoring systems are unable to recover their internal faulty entities forcing the network administrator to manually fix the occasionally broken monitoring solution. In this paper we address this issue by introducing a self-healing monitoring solution. This solution is described considering a scenario of a monitoring system for a Network Access Control (NAC) installation. The proposed solution combines the availability provided by P2P-based overlays with self-healing abilities. This paper also describes a set of experimental evaluations whose results present the tradeoff between the time required to recover the monitoring infrastructure when failures occur, and the associated bandwidth consumed in this process. Based on the experiments we show that it is possible to improve availability and robustness with minimum human intervention.
2009 IFIP/IEEE International Symposium on Integrated Network Management, 2009
Known by the acronym "ISINM" prior to 1997, this biennial symposium series has earned a worldwide... more Known by the acronym "ISINM" prior to 1997, this biennial symposium series has earned a worldwide reputation as the leading event in the field of network and distributed systems management. Since 1989, it has provided a technical forum for the research, standards, development, systems integrator, vendors, and user communities. Each IM has a general theme that aims to capture the essence of what was most important in integrated network management at a particular time. This year's theme is "Making Management Scalable, Robust, Cost-Effective, and Revenue-Generating." The growth in the size and complexity of information processing systems has continued at the same time that reliance on their operations has increased. Management is critical to maintaining the utility of these interconnected systems, and it has to be effective from a business perspective as well. You will see such factors addressed in many of the symposium presentations. The Organizing Committee of IM 2009 has put together an outstanding program. There will be 41 papers presented in the 13 sessions of the main conference, with a very selective acceptance rate of 32.8%. For the first time, IM will also include a Mini-Conference to accommodate a larger number of technical contributions. The associated mini-conference will include 32 papers, presented over its eight sessions. Additionally, there will be two poster sessions that will include 22 poster presentations, and three application sessions where 9 papers will be presented. Continuing a recent trend, IM also has three dissertation digest sessions, where a selected set of seven papers representing the best Ph.D. work in the area of network and service management will be presented. In addition, we will have: six keynote speakers, who are well known leaders in their respective fields; four panel sessions; eight tutorials; and four workshops. The overall program brings together top experts from both industry and academia to provide a wide range of perspectives, practices, and technical expertise. The symposium would not have been possible without the tireless efforts of the entire IM 2009 Organizing Committee. We would like to commend them for their professionalism and commitment. We are most grateful to the authors who submitted their work, which is the basis for the conference. We would also like to thank the technical program committee members, the reviewers who diligently supported the peer review process, the workshop chairs who worked hard to organize the workshops, and everyone else for their time and dedication to put together this remarkable program. We are also extremely grateful to those who are involved in making the local arrangements, designing and building the website, creating the publications and promotional materials, and handling registrations. A special acknowledgement goes to the staff of the IEEE Communications Society who supported us throughout. Last, but far from least, we would like to express our gratitude to the patrons who so generously contributed to the symposium. We are sure you will enjoy Long Island, just a short train ride from New York City, but with a character of its own. Two local events have been arranged to provide an opportunity for you to get together with friends and colleagues. We hope that your symposium experience is an enjoyable one.
2009 IFIP/IEEE International Symposium on Integrated Network Management, 2009
This work proposes a probabilistic management paradigm for solving some major challenges of decen... more This work proposes a probabilistic management paradigm for solving some major challenges of decentralized network management. Specifically, we show how to cope with 1) the overhead of redundant information gathering and processing, 2) the decentralized management in dynamic and unpredictable environments, and 3) the considerable effort required for decentralized coordination of management functions. To this end, we describe a framework for probabilistic decentralized management in the context of In-Network Management (INM). We demonstrate how this framework can be applied to a network of information, a novel clean-slate approach towards an information-centric future Internet. We show by means of a simulation study in the area of performance and fault management that we can significantly reduce the effort and resources dedicated to management, while we are able to achieve a sound level of accuracy of the overall network view.
12th IFIP/IEEE International Symposium on Integrated Network Management (IM 2011) and Workshops, 2011
Abstract-In-network management (INM) is a paradigm for distributed and embedded management for fu... more Abstract-In-network management (INM) is a paradigm for distributed and embedded management for future networks. One of its main design goals is to be used in conjunction with Network-as-a-Service (NaaS)-enabled networks, which need to be managed ...
IEEE Transactions on Network and Service Management, 2004
IEEE Communications Magazine, 2012
In this article, physical layer awareness in access, core, and metro networks is addressed, and a... more In this article, physical layer awareness in access, core, and metro networks is addressed, and a Physical Layer Aware Network Architecture Framework for the Future Internet is presented and discussed, as proposed within the framework of the European ICT Project 4WARD. Current limitations and shortcomings of the Internet architecture are driving research trends at a global scale toward a novel, secure, and flexible architecture. This Future Internet architecture must allow for the coexistence and cooperation of multiple networks on common platforms, through the virtualization of network resources. Possible solutions embrace a full range of technologies, from fiber backbones to wireless access networks. The virtualization of physical networking resources will enhance the possibility of handling different profiles, while providing the impression of mutual isolation. This abstraction strategy implies the use of well elaborated mechanisms in order to deal with channel impairments and requirements, in both wireless (access) and optical (core) environments.
IEEE Transactions on Network and Service Management, 2007
2009 IFIP/IEEE International Symposium on Integrated Network Management, 2009
Abstract. Future communication networks will be composed of a diversity of highly heterogeneous n... more Abstract. Future communication networks will be composed of a diversity of highly heterogeneous network variants, ranging from energy constrained wireless sensor networks to large-scale wide area networks. The fact that the size and complexity of such networks will experience tremendous growth will eventually render existing traditional network management paradigms unfeasible. We propose the radically new paradigm of in-network management, which targets the embedding of self-management capabilities deep inside the network nodes. In this paper, we focus on our framework for in-network management, which allows management logic to be embedded and executed within network nodes. Based on a specific use-case of bio-inspired network management, we demonstrate how our framework can be exploited in a network failure scenario using quorum sensing and chemotaxis.
In-Network Management, INM, is a novel network management concept designed by WP4, in which manag... more In-Network Management, INM, is a novel network management concept designed by WP4, in which management tasks are embedded in the network, while utilizing distributed architecture, self-organization and autonomy. This deliverable evaluates the INM design work recently completed by all WP4 tasks and cross WP activities. It compiles a comprehensive list of requirements collected from the definition of Future Internet scenarios that were described at the beginning of the project, and use it as an evaluation criterion. An adapted V-model is used for the evaluation methodology, with two agreed templates, one for the framework and one for the algorithms. The INM evaluation analysis demonstrates a comprehensive coverage of requirements. INM is shown to be beneficial for all evaluation criteria, NewAPC, VNets, GPs, and NetInf, while realising potential business incentives, when compared with legacy network management systems. As the next step, INM should be experimented with real networks.
The current Internet is indubitably the sum and substance of today's global integrated commun... more The current Internet is indubitably the sum and substance of today's global integrated communications infrastructure and service platform that has harnessed more than a billion users across the world. However, the tremendous impetus of internet-based infrastructures and services has resulted in the conception of a state of affaires that is completely different than what was envisioned when internet's architecture was designed in the 1970s. It is therefore become indispensable to develop the Future Internet that can cope with the emerging demands of in- formation society of tomorrow. An important factor for the successful deployment of Future Internet is to prepare a compelling case to convince the operators that Future Internet will assure business benefits for them. In this paper, we identify key technological challenges that need to be addressed to achieve this goal. This paper consolidates the activities of three research projects and provides valid and experienced design...