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Nowadays, the constantly changing market demands make modern automation systems offer more strict flexibility and efficiency requirements as energy efficiency, performance optimization and tolerance to process or controllers faults… The introduction of reconfiguration mechanisms within production automation systems allow meeting some of these requirements but, at the same time, they lead more complex...
Cloud environments are criticized for their volatility in performance aspects, making it extremely difficult for time- critical applications owners to perform the decisive step for migration and owners of SaaS to present performance vs cost tradeoffs to their customers when acting as IaaS customers. The aim of this work is to present an architectural approach based on which a)IaaS providers may enhance...
Monitoring the physical layer is key to detect bit error rate (BER) degradation caused by failures and to identify the cause of the failure and localize the failed elements. Once the failure has been detected, actions can be taken to reduce as much as possible its impact on the network. Commercially available optical equipment are able to correct degraded optical signals by means of Forward Error...
Networked Music Performance (NMP) constitutes a class of ultra-low delay sensitive applications, allowing geographically separate musicians to perform seamlessly as a tele-orchestra. For this application type, the QoS indicator is the mouth-to-ear delay, which should be kept under 25 milliseconds. The mouth-to-ear delay comprises signal processing latency and network delay. We propose a strong collaboration...
Software Defined Networking (SDN) is the key technology for combining networking and Cloud solutions to provide novel applications. SDN offers a number of advantages as the existing resources can be virtualized and orchestrated to provide new services to the end users. Such a technology should be accompanied by powerful mechanisms that ensure the end-to-end quality of service at high levels, thus,...
Fifth generation mobile communication (5G) networks promise lower latency, higher traffic volume and data rates compared to what we see nowadays. Among all technologies, Network Function Virtualization (NFV) and Software Defined Networking (SDN) techniques over the cloud-enabled radio systems play an important role to enable resource pooling, scalability, layer interworking and spectral efficiency...
Software-Defined Networking (SDN) is an innovative approach to provisioning and delivering QoS (Quality of Service) services, yet it is still devoid of context-differentiating services. In this paper we propose a network application (Autonomic QoS Broker) and a controller module that implements the OpenVSwitch Database Management Protocol (OVSDB). These two components were implemented and validated...
The main goal of the CDN network (content delivery network) is delivery content (information) to endusers with high availability and high performance and adequate quality. And so also solve some problems such as improving global availability and reducing bandwidth. It was suggested that the use of a monitoring system allows to have the latest information about the status of any server and make optimum...
Service Function Chaining (SFC) serves the traffic of a specific service along an ordered set of Service Functions (SFs). SFC uses Software Defined Networking (SDN) and Network Function Virtualization (NFV) technologies to reach the deployment and removal of SFC in an appropriate time with minimal costs. However, during the life time of deployed SFCs, the SFs are exposed to the risk of overloading,...
The promise of SDN/NFV to offer enhanced functionalities to the service provider networks is now tangible as both technologies have started being steadily investigated and experimentally demonstrated. However, a number of research challenges have not been fully addressed yet. More specifically, a limited interest has been devoted on how to assure reliability and QoS performance while data traverse...
Service oriented systems are highly dynamic systems composed of several web services. One of the most important challenges in service oriented systems is to deliver acceptable quality of service. For this purpose, it is required to monitor quality of service along different activities of service oriented system. Existing research focuses on specific activities but do not take into account all the...
Service Level Agreement (SLA) is gaining more and more interest since the dynamic aspect of the cloud computing can adversely influence the guarantee of the Quality of Service (QoS). Proving an SLA violation is considered to be a complex operation to the cloud consumer. This task gets more and more difficult to the consumers as they use services from multiple providers, each with its own monitoring...
Service identification meets with new challenges with overwhelming rise of categories and numbers of services in big data scenarios. Most of the current service identification approaches have paid little attention to the granularity of indicator for service identification, neither do they provide with any trustworthy monitoring mechanism during the process of service identification. To address the...
Recent advances in wireless communication and electronic manufacture have allowed the creation of a variety of bio-sensors to be used for Wireless Body Area Networks (WBANs). These devices operate in close vicinity to, on or inside a human body. WBANs have gained much interest and became emerging technology in health monitoring due to its wide range of use in improving the human health. Many earlier...
Medical applications, along with Information and Communication Technology (ICT), have contributed with many solutions to support the treatment of SEPSIS. However, there are few solutions for the transport of sepsis data with Quality of Service (QoS). In this paper we propose a self-manageable architecture for the provision and delivery of sepsis data using Software-Defined Networking (SDN). To evaluate...
This paper presents a video quality monitoring platform for Digital Terrestrial Television (DTT) service providers that rapidly detects the source of a possible low quality for their broadcasted programs. The platform monitors both the video quality and the Quality of Service (QoS) parameters. The test measurements were performed on channel 54, transmitted with Digital Video Broadcasting — Terrestrial...
In this work, we propose a GRASP+VNS algorithm for solving the allocation of Roadside Units (RSUs) in a Vehicular Network. Our main objective is to find the minimum set of RSUs to meet a Deployment Delta (ρ1,ρ2). The Deployment Delta (ρ1,ρ2) is a metric for specifying minimal communication guarantees from the infrastructure supporting the Vehicular Network. We compare GRASP+VNS to some baseline algorithms:...
Service systems in upcoming application domains like the Internet of Things (IoT) have a high demand for dynamic changes of provided service quality and related pricing. Changes can be requested by service consumers to address adjusted requirements at application level or by service providers to accommodate resource constraints. Anyway, traditional approaches to handle Service Level Agreements (SLA)...
A number of monitoring approaches for cloud services have been proposed in the last years. However, they suffer from several limitations mainly due to changes in the monitoring requirements or because of the complexity in dealing with raw data from services at runtime. To address these problems, in a previous work, we proposed a platform-independent monitoring middleware for cloud services using models@runtime...
Cloud Computing, as a distributed computingparadigm, consists in provisioning infrastructure, software, andplatform resources as services. This paradigm is being increasinglyused for the deployment and execution of servicebasedapplications. To efficiently manage them according to theautonomic computing paradigm, service-based applications canbe associated with autonomic manager (AM) components thatmonitor,...
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