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Nowadays, cloud computing is hard to effectively sustain the implementation of the commercial model of Internet Service globalization. There is a growing trend to build an environment of cloud service, with the capacity to serve anytime and anywhere, by mutual cooperation between cloud service providers around the world. However, this tendency will raise a key issue which is how to provide a benign...
Policy-based concept and service-oriented design are two promising techniques in network management. In this paper we show that integrating policy-based management with service-oriented design can significantly improve the autonomic and flexible capabilities for management. In particular, we propose an architecture that covers policy modeling, specification and enforcement in a service-oriented manner...
This paper presents an architecture that supports Quality of Service (QoS) in an Arrowhead-compliant System of Systems (SoS). The Arrowhead Framework supports local cloud functionalities for automation applications, provided by means of a Service Oriented Architecture (SOA), by offering a number of services that ease application development. On such applications the QoS guarantees are required for...
Service Oriented Architectures have been increasingly evaluated and applied within military networks. However, existing implementations tend to overlook the constraints of the tactical environment, generating unsuitable requirements of network resources. The ongoing TACTICS project aims to study these constraints and propose solutions suitably adjusted to the tactical ecosystem. Under this scope,...
For the recent advances of Cloud Computing technologies, cloud applications have been popularity for their rich set of features. Therefore, their practical use for promoting business values can be expected. As such, cloud applications are recognized as a trend for the next generation of existing Web applications, and hence how to migrate these Web applications to the clouds becomes a desired field...
Dynamic selection of services and by extension of service providers are vital in today's liberalized market of energy. On the other hand it is equally important for Service Providers to spot the one QoS Module that offers the best QoS level in a given cost. Type of service, response time, throughput, availability and cost, consist a basic set of attributes that should be taken into consideration when...
The IoT research area has evolved to incorporate a plethora of messaging protocol standards, both existing and new, emerging as preferred communications means. The variety of protocols and technologies enable IoT to be used in many application scenarios. However, the use of incompatible communication protocols also creates vertical silos and reduces interoperability between vendors and technology...
Web services are the key technologies for the web applications developed using Service Oriented Architecture (SOA). There are many challenges involved in implementing web services. Some of them are web service selection and discovery which involves matchmaking and finding the most suitable web service from a large collection of functionally-equivalent web services. In this paper a fuzzy-based approach...
Some time passed since the first definitions of Cloud architectures. During the years Cloud systems became more and more complex. The main idea is that all Cloud components offer their functions as a service. For this reason Cloud systems inherits many features from old Web Services and Service Oriented architectures. At the moment, the need for composition and automation of Cloud services is a hot...
Nowadays, QoS parameters are more and more integrated in composite web service architectures. The performance evaluation of the latter is becoming a challenging issue, as it demands to satisfy complex synchronization as well as different requirements. We investigate in this paper the use of Time Petri Nets (TPN) for modeling and analyzing the behavior of such architectures in the aim to compute the...
Virtual Communities (VCs) are dominating our daily activities from different insights. Social, Business, Professional, Educational and many VCs are competing to conquer the cloud by targeting more audience through the services they provide. The diversity, magnitude and quality of provided services raise a new challenge for managing these services. Consequently, the success or failure of VCs depends...
As the automotive industry moves towards reduced physical prototyping it is becoming more dependent on distributed simulations. However, the current technologies do not fully enable real-time distributed simulations which involve both virtual and physical components. This paper considers the current approaches to real-time distributed simulation and proposes the use of service-orientation. The highlights...
A Cloud-based Service-Oriented Architecture (CBSOA) is typically composed of web services, which are offered off the cloud marketplace. CB-SOA can improve its utility and add value to its composition by switching among its constituent services. We look at the option to defer the decision of substitution under uncertainty. We exploit Binomial Options to the formulation. We quantify the time-value of...
In order to optimize the mapping between service composition and operational activities within the process of service oriented architecture design, a method based on the DODAF 2.0 is proposed to match operational activities with services. Firstly, related architectural description methods, including Object-oriented method and the formal method, are studied based on the DODAF2.0. Secondly, considering...
Service Level Agreements (SLAs) establish the Quality of Service (QoS) agreed between service-based systems consumers and providers. Since the violation of such SLAs may involve penalties, quality assurance techniques have been developed to supervise the SLAs fulfillment at runtime. However, existing proposals present some drawbacks: 1) the SLAs they support are not expressive enough to model real-world...
Cloud computing is an emergent technology that offers a pool of configurable resources such as processors, networks, storages, operating system, database, and servers. These resources are offered as Web services deployed on the cloud. The coordination of the interactions between these services is one of the key challenges of cloud architecture. Any failings in these services could lead to lack of...
Technical evolution has been improved day-by-day in web services. Service provider has provided several monumental changes to fulfill the requirement of service requester. Generally these services are provided through functional and non-functional Quality of Service (QoS). Most of these models lack unique factors like selection, ranking and other QoS parameters. The proposed system describes the Web...
Access Control Policies are one of the key challenges affecting Service oriented Architectures (SoA). This is due to the nature of SoA, which is based on the distributed invocations of Web services. This makes it crucial to develop a method of on-line assignment for Access Control Policies and Web services. This paper proposes a service referred to as Access Control Policies (AC Polices), which allows...
The transport stratum in the ITU-T Next Generation Networks (NGN) is expected to provide end-to-end connectivity according to the service requirements, the terminal capability and status of the network resource availability. Whereas mature technologies and protocols, such as DiffServ and MPLS, are available to satisfy these requirements, some issues are still open concerning the capability to provide...
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