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Quality of Service (QoS) is an important enabler for communication in industrial environments. The Arrowhead Framework was created to support local cloud functionalities for automation applications by means of a Service Oriented Architecture. To this aim, the framework offers a number of services that ease application development, among them the QoSSetup and the Monitor services, the first used to...
As communication is the most fundamental resource for a smart city, it cannot allow any disruption with the related services. Therefore, real-time monitoring systems for the QoS state for the communication infrastructure are vital. Such systems that can detect communications failure can be used also for redeploying emergency and ad-hoc communications infrastructures. Sudden-Onset Disasters (SOD) typically...
The amount of data that human activities generate poses a challenge to current computer systems. Big data processing techniques are evolving to address this challenge, with analysis increasingly being performed using cloud-based systems. Emerging services, however, require additional enhancements in order to ensure their applicability to highly dynamic and heterogeneous environments and facilitate...
In this paper a novel reputation-based trust framework in federated testbeds is presented, termed as Federated Trust and User Experience (FTUE) Framework. Our aim is to assist peer experimenters in properly selecting resources from the federated community by constructing a quantitative view of the trustworthiness of each testbed. The FTUE framework combines the perceived user experience, as provided...
Software Defined Networks are intended to be less complex, more flexible, and free of vendor-lock-ins. Therefore the Software Defined Networking (SDN) instantiation OpenFlow has been designed according to these properties. The efforts are expected to result in lower expenditure and operational costs. To reach these objectives, mechanisms of classical networks that provide established functionalities...
Performing functionality testing in serviceoriented architectures is not a trivial task. The difficulty is especially the large number of components that may be present in a SOA such as brokers, providers, service registries, clients, monitoring tools, data storage tools, etc. Thus, in order to facilitate the process of conducting functional testing and capacity planning in service-oriented systems,...
Smart spaces are highly dynamic interactive environments supporting people in their activities. Management of such environments is a very challenging task due to the volatile nature of the interactions happening among resources and people acting in these environments. In this article, we study whether meta-level control of smart spaces helps to tackle this challenge. We suggest making a distinction...
In Internet networks, monitoring is necessary to guarantee the performance of the services. In this paper, we review the state-of-the-art monitoring architectures proposed for multi-domain networks. We note that these architectures do not support measurement configuration that enables the providers to perform flexible multi-domain measurements. Therefore, we present our proposal for the configuration...
A widespread methodology for performance analysis in the field of communication systems engineering is network simulation. Network Simulator 2 (NS2) is one of the most popular tools in academia for evaluation of network, protocols and topologies. It has become virtually the standard of network simulation. It represents a discrete, event-based simulator that has an ability to be easily extendible and...
In order to accomplish the automatic and intelligent management to the satellite network, this paper designs a policy-driven self-management model which integrates all network management function components by policy engine to manage the network. In the model, policy decision point receives soft-faulty events, conducts policy decision-making and sends the results to the corresponding management function...
This article proposes an Active-Fault-Alarm (AFA) based Dynamic Temporary Protection Mechanism (DTPM) that is applied into the multi-protocol label switching transport profile (MPLS-TP) optical network. The new DTPM, by using the AFA function, can establish dynamically the so called temporary protection path (TPP) for the work path in advance before possible fault occurs and keep flexibly the TPP...
Web services have emerged as a technology that aims at improving the communication between applications, through the service-oriented paradigm. Researches involving web semantics, ontology and composition of services has currently been developed. However, research in performance evaluating of web services architecture with quality of service support (QoS) is little widespread. Some works separately...
Performability control of IT systems still lacks theoretically well-founded approaches that fit well to enterprise system management solutions. We propose a methodology for designing compact qualitative, state-based predictive performability control that use instrumentation provided by typical system monitoring frameworks. We identify the main systemic insufficiencies of current monitoring tools that...
Cloud computing represents a novel on-demand computing approach where resources are provided in compliance to a set of predefined non-functional properties specified and negotiated by means of Service Level Agreements (SLAs). In order to avoid costly SLA violations and to timely react to failures and environmental changes, advanced SLA enactment strategies are necessary, which include appropriate...
Internet Advanced Technology Attachment (iATA) is a lightweight block-level protocol developed to transmit ATA commands over Internet. With the mass storage demand increasingly in mobile appliances, iATA provides an alternative cost-effective solution for clients to access and control remote storage devices freely. Number of Sectors per Command (NSPC) is the parameter contributes to iATA performance,...
The provision of Quality of Service in Grid environments is still an open issue that needs attention from the research community. One way of contributing to the provision QoS in Grids is by performing meta-scheduling of jobs in advance, that is, jobs are scheduled some time before they are actually executed. In this way, the aproppriate resources will be available to run the job when needed, so that...
Networks have become an integral part of the computing landscape, forming a global interconnection of a staggering number of heterogeneous systems and services. Current research focuses on policy based management and autonomous systems and involves the utilisation of very different languages and technologies in concert. This paper examines four current proposals for autonomous network management and...
Composing communication protocols as needed is a topic researched for a long time with moving focus. Nevertheless the vast flexibility of these proposals also prevented the real world success: there was no management solution available that could cope with the many degrees of freedom such architectures offer. This paper discusses the Dynamic Protocol Composition (DPC) architecture developed in the...
In this paper, we propose a network performance monitoring method which can measure delay of each network using the RTCP(Real-time Transport Control Protocol) timestamp fields to detect a trouble section in interworking environment. According to the increment of real-time multimedia service provision, network performance monitoring method is necessarily needed for QoS management of real-time services...
Quality-of-service aware packet protection is demonstrated using cross-layer signaling from a delay-line-interferometer-assisted optical-signal-to-noise-ratio monitor. 8??10 Gb/s wavelength-striped optical messages are successfully rerouted based on performance monitoring measurements communicated between the physical and networking layers.
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