Marco Ramilli | Università di Bologna (original) (raw)

Books by Marco Ramilli

Research paper thumbnail of Design A New Electronic Voting System: Towards Electronic Voting Systems

Papers by Marco Ramilli

Research paper thumbnail of The European IST project DAVID: A viable approach toward optical packet switching

Abstract In this paper, promising technologies and a network architecture are presented for futur... more Abstract In this paper, promising technologies and a network architecture are presented for future optical packet switched networks. The overall network concept is presented and the major choices are highlighted and compared with alternative solutions. Both long and shorter term approaches are considered, as well as both the wide-area network and multiple-area networks parts of the network.

Research paper thumbnail of Demonstration of Application Layer Service Provisioning Integrated on Full-Duplex Optical Burst Switching Network Test-bed

Abstract This paper presents an application-aware asynchronous SIP-enabled optical burst switched... more Abstract This paper presents an application-aware asynchronous SIP-enabled optical burst switched network demonstrator. Seamless, one-step application session and data layer connection establishment is being demonstrated by publishing, discovering and reserving resources utilising integrated JIT-SIP OBS protocols.

Research paper thumbnail of Integrated signaling framework for joint reservation of application and network resources for the Future Internet

Abstract This work presents a signaling framework for the Future Internet capable of enabling uni... more Abstract This work presents a signaling framework for the Future Internet capable of enabling unified network and IT resource allocation. The proposed signaling scheme is based on existing technologies and carried out through extensions to protocols already operated in current Internet, ie, SIP, and by resorting to source-initiated GMPLS signaling without introducing network technology-dependent mechanisms. The experimental validation presented in this work has been carried out on a real test-bed.

Research paper thumbnail of Optical Packet Switching: A Network Perspective

Abstract—In the last few years research on WDM optical packet-switching has mainly concentrated o... more Abstract—In the last few years research on WDM optical packet-switching has mainly concentrated on issues at the single node level. The goal of this paper is to discuss about the problems arising when the focus is moved toward a network-wide scope. In particular, an overview of routing techniques that may be adopted in an optical packet-switched backbone is presented, showing the effects of adaptive multi-path routing strategies on the network performance.

Research paper thumbnail of Design of a computer networking laboratory for efficient manageability and effective teaching

Abstract Computer networking laboratories represent a key resource for ICT-oriented academic orga... more Abstract Computer networking laboratories represent a key resource for ICT-oriented academic organizations. However, due to the particular nature of their users (ie students who must learn and experiment while working on real network equipment), it is difficult to design and implement fully functional laboratory facilities while still complying with budget, academic and management objectives.

Research paper thumbnail of Software emulation of programmable optical routers

Abstract—Programmable optical networks are a key solution to high performance dynamic network ser... more Abstract—Programmable optical networks are a key solution to high performance dynamic network services in Future Internet scenario. Modular router architecture which meets this concept is here defined and represented in a flexible software context, using Click! tools. Evaluation of logical performance and testing of physical characteristics of information forwarding within this framework is shown as feasible.

Research paper thumbnail of Keeping the packet sequence in optical packet-switched networks

This paper deals with optical packet switches with limited buffer capabilities, subject to asynch... more This paper deals with optical packet switches with limited buffer capabilities, subject to asynchronous, variable-length packets and connection-oriented operation. The focus is put on buffer scheduling policies and queuing performance evaluation. In particular a combined use of the wavelength and time domain is exploited in order to obtain contention resolution algorithms that guarantee the sequence preservation of packets belonging to the same connection.

Research paper thumbnail of Analytical Model for Anycast Service Provisioning in Data Center Interconnections

Abstract This paper presents an analytical model to evaluate the performance of an optical wavele... more Abstract This paper presents an analytical model to evaluate the performance of an optical wavelength-routed network for inter-and intra-data center interconnection, designed to work according to the cloud computing paradigm. Such a scenario calls for anycast routing of service requests to find a network path that best suits both connectivity and IT resource requirements.

Research paper thumbnail of PI-OBS: a parallel iterative optical burst scheduler for OBS networks

Abstract This paper presents the PI-OBS algorithm, a parallel-iterative scheduler for OBS nodes. ... more Abstract This paper presents the PI-OBS algorithm, a parallel-iterative scheduler for OBS nodes. Conventional schemes are greedy in the sense that they process headers one by one. In PI-OBS, all the headers received during a given time window are jointly processed to optimize the delay and output wavelength allocation, applying void filling techniques, and allowing traffic differentiation. Results show a similar or better performance than the LAUC-VF algorithm, commonly used as a performance bound for OBS schedulers.

Research paper thumbnail of Network Resource Allocation in Data Center Interconnection with Anycast Service Provisioning

Abstract—The joint management of IT and network resources is a key aspect for dynamic inter-data ... more Abstract—The joint management of IT and network resources is a key aspect for dynamic inter-data center interconnection networks designed to work according to the cloud computing paradigm. Such a scenario calls for the anycast routing of service requests to find a data channel that best suits both connectivity and IT resource requirements.

Research paper thumbnail of A parallel iterative scheduler for asynchronous Optical Packet Switching networks

This paper presents PI-OPS (Parallel-Iterative Optical Packet Scheduler) a parallel-iterative sch... more This paper presents PI-OPS (Parallel-Iterative Optical Packet Scheduler) a parallel-iterative scheduler for asynchronous Optical Packet Switching nodes with optical buffering. Optical packets are assembled by aggregating IP packets, and attaching an optical packet header. Conventional schemes process optical packet headers one by one, in a sequential form. Then, the worst case algorithm response time is tightly coupled to switch size.

Research paper thumbnail of A Cooperative Approach to Lab-Based, Multi-Team Courses in an iSchool

Abstract: The iSchool at the University of Pittsburgh has designed a new learning experience that... more Abstract: The iSchool at the University of Pittsburgh has designed a new learning experience that will allow future leaders of the iProfession to gain critical skills and to experience working in culturally diverse teams. The iSchool has, as one of its mission-critical goals, to create learning experiences that imitate the collaborative nature of the information professions.

Research paper thumbnail of Open-Source Software Virtualization Tools for Programmable Modular Router Implementation and Testing

Advanced transport technologies offer large capacities in both core and access telecommunication ... more Advanced transport technologies offer large capacities in both core and access telecommunication networks. This opportunity can be fruitfully exploited to meet the requirements of new network service markets which strongly promote emerging bandwidth-demanding applications, such as large data transfers, immersive video-conferencing, high-definition TV and cinema services.

Research paper thumbnail of End-to-End Performance of Heterogeneous Multi-EPON/OBS Networks

Abstract In this paper end-to-end performance is evaluated when multiple high-speed access networ... more Abstract In this paper end-to-end performance is evaluated when multiple high-speed access networks, based on the Ethernet Passive Optical Network (EPON) technology, are interconnected through an Optical Burst Switching (OBS) core network. The inter-working unit, or edge node, between these two different networks is properly studied and discussed. A time-based burst assembly algorithm is assumed, which is analyzed and dimensioned to cope with multiple EPONs.

Research paper thumbnail of SIP-enabled Optical Burst Switching architectures and protocols for application-aware optical networks

This paper presents a novel application-aware network architecture for emerging IT services and f... more This paper presents a novel application-aware network architecture for emerging IT services and future Internet applications. It proposes and analyses network architectures that integrate Session Initiation Protocol (SIP) with Optical Burst Switched (OBS) network technology in a unified manner. It demonstrates that the proposed SIP-enabled OBS network can be used to manage application sessions and provide network and IT services according to the application requirements.

Research paper thumbnail of Transport layer performance of hybrid networks combining multiple EPONs and OBS

Abstract In this paper the performance of a hybrid optical network composed of multiple Ethernet ... more Abstract In this paper the performance of a hybrid optical network composed of multiple Ethernet Passive Optical Networks (EPONs) at the access connected to an Optical Burst Switching (OBS) core is evaluated. The EPONs make use of the IPACT algorithm to manage the upstream transmissions, whereas the OBS edge node employs a time-based assembly scheme for burst aggregation. This leads to interoperability issues between access and core which are investigated in this paper.

Research paper thumbnail of A cost-effective approach to optical packet/burst scheduling

Abstract Optical burst and packet switching are being considered as the most promising paradigms ... more Abstract Optical burst and packet switching are being considered as the most promising paradigms to increase bandwidth efficiency in IP over DWDM networks. In both cases, due to statistical multiplexing, a scheduling policy is needed to solve contentions at the node level caused by more than one burst/packet directed to the same output channel. The scheduling may be performed in the wavelength, time and space domains, turning this problem into a choice of the best available resource in the different domains.

Research paper thumbnail of Optical burst and packet switching: node and network design, contention resolution and quality of service

Abstract Future network should be able to efficiently serve packet-based networks, such as the In... more Abstract Future network should be able to efficiently serve packet-based networks, such as the Internet. In this paper, based on results from COST 266, we explore characteristics of optical burst switching (OBS) and optical packet switching (OPS). Both node design and metropolitan area network (MAN) are discussed. A unique joint comparative performance evaluation of contention resolution in OBS and OPS are presented, as well as methods of quality of service (QoS) differentiation in OBS/OPS networks, and their performance.

Research paper thumbnail of PHONe: Programmable Hybrid Optical Networks: Opportunities for Research and Experiments

Abstract—Programmable hybrid optical networks are investigated as a solution to deploy flexible f... more Abstract—Programmable hybrid optical networks are investigated as a solution to deploy flexible functionalities in next generation networks. A modular programmable router architecture, based on emerging standards, is proposed to support dynamic management and configuration capabilities of network resources and services. The new node design concepts allow vendor-independent development of hybrid router components and further implementation of new standard interfaces.

Research paper thumbnail of Design A New Electronic Voting System: Towards Electronic Voting Systems

Research paper thumbnail of The European IST project DAVID: A viable approach toward optical packet switching

Abstract In this paper, promising technologies and a network architecture are presented for futur... more Abstract In this paper, promising technologies and a network architecture are presented for future optical packet switched networks. The overall network concept is presented and the major choices are highlighted and compared with alternative solutions. Both long and shorter term approaches are considered, as well as both the wide-area network and multiple-area networks parts of the network.

Research paper thumbnail of Demonstration of Application Layer Service Provisioning Integrated on Full-Duplex Optical Burst Switching Network Test-bed

Abstract This paper presents an application-aware asynchronous SIP-enabled optical burst switched... more Abstract This paper presents an application-aware asynchronous SIP-enabled optical burst switched network demonstrator. Seamless, one-step application session and data layer connection establishment is being demonstrated by publishing, discovering and reserving resources utilising integrated JIT-SIP OBS protocols.

Research paper thumbnail of Integrated signaling framework for joint reservation of application and network resources for the Future Internet

Abstract This work presents a signaling framework for the Future Internet capable of enabling uni... more Abstract This work presents a signaling framework for the Future Internet capable of enabling unified network and IT resource allocation. The proposed signaling scheme is based on existing technologies and carried out through extensions to protocols already operated in current Internet, ie, SIP, and by resorting to source-initiated GMPLS signaling without introducing network technology-dependent mechanisms. The experimental validation presented in this work has been carried out on a real test-bed.

Research paper thumbnail of Optical Packet Switching: A Network Perspective

Abstract—In the last few years research on WDM optical packet-switching has mainly concentrated o... more Abstract—In the last few years research on WDM optical packet-switching has mainly concentrated on issues at the single node level. The goal of this paper is to discuss about the problems arising when the focus is moved toward a network-wide scope. In particular, an overview of routing techniques that may be adopted in an optical packet-switched backbone is presented, showing the effects of adaptive multi-path routing strategies on the network performance.

Research paper thumbnail of Design of a computer networking laboratory for efficient manageability and effective teaching

Abstract Computer networking laboratories represent a key resource for ICT-oriented academic orga... more Abstract Computer networking laboratories represent a key resource for ICT-oriented academic organizations. However, due to the particular nature of their users (ie students who must learn and experiment while working on real network equipment), it is difficult to design and implement fully functional laboratory facilities while still complying with budget, academic and management objectives.

Research paper thumbnail of Software emulation of programmable optical routers

Abstract—Programmable optical networks are a key solution to high performance dynamic network ser... more Abstract—Programmable optical networks are a key solution to high performance dynamic network services in Future Internet scenario. Modular router architecture which meets this concept is here defined and represented in a flexible software context, using Click! tools. Evaluation of logical performance and testing of physical characteristics of information forwarding within this framework is shown as feasible.

Research paper thumbnail of Keeping the packet sequence in optical packet-switched networks

This paper deals with optical packet switches with limited buffer capabilities, subject to asynch... more This paper deals with optical packet switches with limited buffer capabilities, subject to asynchronous, variable-length packets and connection-oriented operation. The focus is put on buffer scheduling policies and queuing performance evaluation. In particular a combined use of the wavelength and time domain is exploited in order to obtain contention resolution algorithms that guarantee the sequence preservation of packets belonging to the same connection.

Research paper thumbnail of Analytical Model for Anycast Service Provisioning in Data Center Interconnections

Abstract This paper presents an analytical model to evaluate the performance of an optical wavele... more Abstract This paper presents an analytical model to evaluate the performance of an optical wavelength-routed network for inter-and intra-data center interconnection, designed to work according to the cloud computing paradigm. Such a scenario calls for anycast routing of service requests to find a network path that best suits both connectivity and IT resource requirements.

Research paper thumbnail of PI-OBS: a parallel iterative optical burst scheduler for OBS networks

Abstract This paper presents the PI-OBS algorithm, a parallel-iterative scheduler for OBS nodes. ... more Abstract This paper presents the PI-OBS algorithm, a parallel-iterative scheduler for OBS nodes. Conventional schemes are greedy in the sense that they process headers one by one. In PI-OBS, all the headers received during a given time window are jointly processed to optimize the delay and output wavelength allocation, applying void filling techniques, and allowing traffic differentiation. Results show a similar or better performance than the LAUC-VF algorithm, commonly used as a performance bound for OBS schedulers.

Research paper thumbnail of Network Resource Allocation in Data Center Interconnection with Anycast Service Provisioning

Abstract—The joint management of IT and network resources is a key aspect for dynamic inter-data ... more Abstract—The joint management of IT and network resources is a key aspect for dynamic inter-data center interconnection networks designed to work according to the cloud computing paradigm. Such a scenario calls for the anycast routing of service requests to find a data channel that best suits both connectivity and IT resource requirements.

Research paper thumbnail of A parallel iterative scheduler for asynchronous Optical Packet Switching networks

This paper presents PI-OPS (Parallel-Iterative Optical Packet Scheduler) a parallel-iterative sch... more This paper presents PI-OPS (Parallel-Iterative Optical Packet Scheduler) a parallel-iterative scheduler for asynchronous Optical Packet Switching nodes with optical buffering. Optical packets are assembled by aggregating IP packets, and attaching an optical packet header. Conventional schemes process optical packet headers one by one, in a sequential form. Then, the worst case algorithm response time is tightly coupled to switch size.

Research paper thumbnail of A Cooperative Approach to Lab-Based, Multi-Team Courses in an iSchool

Abstract: The iSchool at the University of Pittsburgh has designed a new learning experience that... more Abstract: The iSchool at the University of Pittsburgh has designed a new learning experience that will allow future leaders of the iProfession to gain critical skills and to experience working in culturally diverse teams. The iSchool has, as one of its mission-critical goals, to create learning experiences that imitate the collaborative nature of the information professions.

Research paper thumbnail of Open-Source Software Virtualization Tools for Programmable Modular Router Implementation and Testing

Advanced transport technologies offer large capacities in both core and access telecommunication ... more Advanced transport technologies offer large capacities in both core and access telecommunication networks. This opportunity can be fruitfully exploited to meet the requirements of new network service markets which strongly promote emerging bandwidth-demanding applications, such as large data transfers, immersive video-conferencing, high-definition TV and cinema services.

Research paper thumbnail of End-to-End Performance of Heterogeneous Multi-EPON/OBS Networks

Abstract In this paper end-to-end performance is evaluated when multiple high-speed access networ... more Abstract In this paper end-to-end performance is evaluated when multiple high-speed access networks, based on the Ethernet Passive Optical Network (EPON) technology, are interconnected through an Optical Burst Switching (OBS) core network. The inter-working unit, or edge node, between these two different networks is properly studied and discussed. A time-based burst assembly algorithm is assumed, which is analyzed and dimensioned to cope with multiple EPONs.

Research paper thumbnail of SIP-enabled Optical Burst Switching architectures and protocols for application-aware optical networks

This paper presents a novel application-aware network architecture for emerging IT services and f... more This paper presents a novel application-aware network architecture for emerging IT services and future Internet applications. It proposes and analyses network architectures that integrate Session Initiation Protocol (SIP) with Optical Burst Switched (OBS) network technology in a unified manner. It demonstrates that the proposed SIP-enabled OBS network can be used to manage application sessions and provide network and IT services according to the application requirements.

Research paper thumbnail of Transport layer performance of hybrid networks combining multiple EPONs and OBS

Abstract In this paper the performance of a hybrid optical network composed of multiple Ethernet ... more Abstract In this paper the performance of a hybrid optical network composed of multiple Ethernet Passive Optical Networks (EPONs) at the access connected to an Optical Burst Switching (OBS) core is evaluated. The EPONs make use of the IPACT algorithm to manage the upstream transmissions, whereas the OBS edge node employs a time-based assembly scheme for burst aggregation. This leads to interoperability issues between access and core which are investigated in this paper.

Research paper thumbnail of A cost-effective approach to optical packet/burst scheduling

Abstract Optical burst and packet switching are being considered as the most promising paradigms ... more Abstract Optical burst and packet switching are being considered as the most promising paradigms to increase bandwidth efficiency in IP over DWDM networks. In both cases, due to statistical multiplexing, a scheduling policy is needed to solve contentions at the node level caused by more than one burst/packet directed to the same output channel. The scheduling may be performed in the wavelength, time and space domains, turning this problem into a choice of the best available resource in the different domains.

Research paper thumbnail of Optical burst and packet switching: node and network design, contention resolution and quality of service

Abstract Future network should be able to efficiently serve packet-based networks, such as the In... more Abstract Future network should be able to efficiently serve packet-based networks, such as the Internet. In this paper, based on results from COST 266, we explore characteristics of optical burst switching (OBS) and optical packet switching (OPS). Both node design and metropolitan area network (MAN) are discussed. A unique joint comparative performance evaluation of contention resolution in OBS and OPS are presented, as well as methods of quality of service (QoS) differentiation in OBS/OPS networks, and their performance.

Research paper thumbnail of PHONe: Programmable Hybrid Optical Networks: Opportunities for Research and Experiments

Abstract—Programmable hybrid optical networks are investigated as a solution to deploy flexible f... more Abstract—Programmable hybrid optical networks are investigated as a solution to deploy flexible functionalities in next generation networks. A modular programmable router architecture, based on emerging standards, is proposed to support dynamic management and configuration capabilities of network resources and services. The new node design concepts allow vendor-independent development of hybrid router components and further implementation of new standard interfaces.

Research paper thumbnail of Routing techniques in optical packet-switched networks

Abstract In the last few years research on optical packet-switching has mainly concentrated on is... more Abstract In the last few years research on optical packet-switching has mainly concentrated on issues at the single node level. This paper intends to discuss about the problems arising when the focus is moved towards a network-wide scope. In particular, an overview of routing techniques that may be adopted in an optical packet-switched backbone is presented, showing the effects of adaptive multi-path routing strategies on the network performance.