An important revolution is taking place in information technology with the introduction of the cl... more An important revolution is taking place in information technology with the introduction of the cloud computing paradigm, which is expected to bring several new benefits and services to customers. Cloud computing makes it possible to detach the process of building the infrastructure and service delivery to end users by redefining the business models of software and hardware, so that customers stop purchasing goods to buying services. This paper presents the state of the art of cloud computing and discusses the key challenges of an ongoing research work, focused on the applicability of IT governance to the migration of existing systems to the cloud.
This paper presents an overview of JAMES, a Java-based platform of mobile agents that is mainly o... more This paper presents an overview of JAMES, a Java-based platform of mobile agents that is mainly oriented for the management of data and telecommunication networks. This platform has been developed on behalf of a Eureka Project (∑!1921) and the project partners are Siemens SA, University of Coimbra and Siemens AG. We describe the main architecture of the platform giving more emphasis to the most important features. To show the effectiveness of some of the techniques that have been implemented we will present some performance results that compare the JAMES platform with the Aglets Workbench. The main target of our platform is network management and telecommunication applications. In this line, we have done a Java-based implementation of SNMP that has been integrated within the platform. The industrial partners of our project (i.e. Siemens S.A.) have developed a prototype application for TMN performance management. Although it is still a prototype it is being used to validate the technological advantages of using mobile agents in the management of telecommunication networks.
Virtual private networks (VPNs) are a popular and cost-effective means to build wide-area corpora... more Virtual private networks (VPNs) are a popular and cost-effective means to build wide-area corporate networks, since they provide bandwidth, privacy and security for a fraction of the cost of private networks. However, establishing VPNs across different domains (inter-domain VPNs) is still a cumbersome task, requiring human- based negotiation between involved carriers, manual configuration of network equipment and inefficient exploitation procedures during the whole VPN life cycle. For these reasons, inter-domain VPNs are usually contracted in a long-term basis and thus appropriate only for a limited set of usage scenarios. In this paper we propose a framework for efficient provisioning of inter-domain VPNs, comprising a business layer for inter-carrier negotiation and orchestration, policy-based mechanisms for intra-domain resource management, and RFC 4364-based mechanisms for configuration of VPNs. This framework will allow ISPs to provide much more elastic VPN services, able to support not only traditional VPNs (contracted for long periods, for interconnection of corporate networks) but also a new class of more granular, on-demand VPNs for support of shorter-term services such as videoconference sessions or internet banking transaction.
Mobile Code is an emerging paradigm that is gaining momentum in several fields of application. Ne... more Mobile Code is an emerging paradigm that is gaining momentum in several fields of application. Network Management is a potential area for the use of this technology, provided it will be able to interoperate with well established solutions for Network Management. This paper presents the integration a classic NM protocol, like SNMP, into a platform of Mobile Agents. Our platform, called JAMES, has been developed in the context of an Eureka Project (Σ!1921) where the project partners are University of Coimbra, Siemens SA and Siemens AG. Since the main target of the platform is network management, it includes a set of SNMP services allowing mobile agents to easily interface with SNMP agents, as well as with legacy SNMP-based management applications. In the paper we present a brief overview of the general architecture of the platform and we describe in some detail the framework we used to provide for integration between mobile agent applications and SNMP.
WiMAX, as a Broadband Wireless Access technology for Metropolitan Area Networks, supporting fixed... more WiMAX, as a Broadband Wireless Access technology for Metropolitan Area Networks, supporting fixed and mobile terminals, is very promising for Next Generation Networks. Emergency Services can also strongly benefit from WiMAX features, allowing the exploitation of novel application scenarios and business models. This paper presents a set of scenarios, such as Environmental Monitoring, Telemedicine and Fire Prevention, defined and implemented in several European testbeds, interconnected by the European research network GEANT 2, in the framework of the WEIRD project. In particular, we focus our attention on the scenario implemented in the Portuguese testbed - Fire Prevention - providing a detailed description about the testbed planning, implementation and evaluation.
An important revolution is taking place in information technology with the introduction of the cl... more An important revolution is taking place in information technology with the introduction of the cloud computing paradigm, which is expected to bring several new benefits and services to customers. Cloud computing makes it possible to detach the process of building the infrastructure and service delivery to end users by redefining the business models of software and hardware, so that customers stop purchasing goods to buying services. This paper presents the state of the art of cloud computing and discusses the key challenges of an ongoing research work, focused on the applicability of IT governance to the migration of existing systems to the cloud.
This paper presents an overview of JAMES, a Java-based platform of mobile agents that is mainly o... more This paper presents an overview of JAMES, a Java-based platform of mobile agents that is mainly oriented for the management of data and telecommunication networks. This platform has been developed on behalf of a Eureka Project (∑!1921) and the project partners are Siemens SA, University of Coimbra and Siemens AG. We describe the main architecture of the platform giving more emphasis to the most important features. To show the effectiveness of some of the techniques that have been implemented we will present some performance results that compare the JAMES platform with the Aglets Workbench. The main target of our platform is network management and telecommunication applications. In this line, we have done a Java-based implementation of SNMP that has been integrated within the platform. The industrial partners of our project (i.e. Siemens S.A.) have developed a prototype application for TMN performance management. Although it is still a prototype it is being used to validate the technological advantages of using mobile agents in the management of telecommunication networks.
Virtual private networks (VPNs) are a popular and cost-effective means to build wide-area corpora... more Virtual private networks (VPNs) are a popular and cost-effective means to build wide-area corporate networks, since they provide bandwidth, privacy and security for a fraction of the cost of private networks. However, establishing VPNs across different domains (inter-domain VPNs) is still a cumbersome task, requiring human- based negotiation between involved carriers, manual configuration of network equipment and inefficient exploitation procedures during the whole VPN life cycle. For these reasons, inter-domain VPNs are usually contracted in a long-term basis and thus appropriate only for a limited set of usage scenarios. In this paper we propose a framework for efficient provisioning of inter-domain VPNs, comprising a business layer for inter-carrier negotiation and orchestration, policy-based mechanisms for intra-domain resource management, and RFC 4364-based mechanisms for configuration of VPNs. This framework will allow ISPs to provide much more elastic VPN services, able to support not only traditional VPNs (contracted for long periods, for interconnection of corporate networks) but also a new class of more granular, on-demand VPNs for support of shorter-term services such as videoconference sessions or internet banking transaction.
Mobile Code is an emerging paradigm that is gaining momentum in several fields of application. Ne... more Mobile Code is an emerging paradigm that is gaining momentum in several fields of application. Network Management is a potential area for the use of this technology, provided it will be able to interoperate with well established solutions for Network Management. This paper presents the integration a classic NM protocol, like SNMP, into a platform of Mobile Agents. Our platform, called JAMES, has been developed in the context of an Eureka Project (Σ!1921) where the project partners are University of Coimbra, Siemens SA and Siemens AG. Since the main target of the platform is network management, it includes a set of SNMP services allowing mobile agents to easily interface with SNMP agents, as well as with legacy SNMP-based management applications. In the paper we present a brief overview of the general architecture of the platform and we describe in some detail the framework we used to provide for integration between mobile agent applications and SNMP.
WiMAX, as a Broadband Wireless Access technology for Metropolitan Area Networks, supporting fixed... more WiMAX, as a Broadband Wireless Access technology for Metropolitan Area Networks, supporting fixed and mobile terminals, is very promising for Next Generation Networks. Emergency Services can also strongly benefit from WiMAX features, allowing the exploitation of novel application scenarios and business models. This paper presents a set of scenarios, such as Environmental Monitoring, Telemedicine and Fire Prevention, defined and implemented in several European testbeds, interconnected by the European research network GEANT 2, in the framework of the WEIRD project. In particular, we focus our attention on the scenario implemented in the Portuguese testbed - Fire Prevention - providing a detailed description about the testbed planning, implementation and evaluation.
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Papers by Paulo Simoes