Service-oriented software is composed of a combination of services. Because of the dynamic nature of the Web service environment, the QoS often fluctuates with inherent uncertainty and therefore needs to be dynamically replaced. Based on the changes in the QoS of the software itself and users’ requirements for the software, this paper proposes a dynamic replacement approach based on the cloud m...

Best known Cloud providers propose services under constraints of Service Level Agreement (SLA) definitions. The SLAs are composed of different Quality of Service (QoS) rules promised by the provider. Thus, the QoS in Clouds becomes more and more important. Precise definitions and metrics have to be explained. This article proposes an overview of Cloud QoS parameters as well as their classificat...

With the development of high-speed backbone network, more and more traffic load is pushed to the Internet edge equipments and end hosts. Newly emerged bottleneck problems in end systems ask for deploying Quality of Service (QoS) in them. Meanwhile, the tremendous traffic brought by multimedia communications asks for End-to-End QoS. Facing these facts and challenges, a framework of deploying QoS...

This is a survey paper on IP QoS over ATM. It describes the need for QoS in the Internet and the mechanisms of QoS provisioning in IP. ATM is briefly described with a view to highlight its inherent support for QoS. Then, mechanisms of providing IP QoS over an ATM network are considered. Also issues that arise in implementing the various IP QoS over ATM is considered. See Also: Quality Of Servic...

Concern over the accurate evaluation of QoS requirements has been one of driving forces in the development of QoS management architectures. This paper presents an architectural approach to QoS evaluation and admission control, based on the modelling of both system behaviour and QoS requirements. Two aspects are considered. The first refers to QoS management, and to a component-based architectur...

* It is becoming increasingly commonplace for multiple applications with different quality of service (QoS) requirements to share the resources of a distributed system. Within this environment, the resource management algorithms must take into account the QoS desired by applications and the ability of the system resources to provide it. In this paper we present a taxonomy for specifying QoS for...

In an interactive multimedia environment that handles multiple sessions dynamically, a mechanism for controlling the Quality of Service (QOS) among sessions is very important. The QOSControl Server described in this paper is such a mechanism, developed on RT-Mach. This paper gives the results of several experiments with this server, and describes the extensions of RT-Mach needed for e cient QOS...

In this work the Service abstraction is extended to support Quality of Service (QoS) attributes – and implemented in the Grid QoS Management (G-QoSM) framework. The framework supports three main functions: (1) providing mechanisms for establishing QoS guarantees via Service Level Agreements (SLAs), (2) enabling QoS management on allocated QoS-aware services, and (3) supporting discovery of serv...

The current Internet service model treats all requests equivalently, both while being processed by servers and while being transmitted over the network. Growing usage and diversity of applications on the Internet makes Quality of Service (QoS) an increasingly critical issue, especially in the e-commerce realm. This paper covers the motivation and considerations for adding QoS to the Internet, t...

In the last years, multimedia applications have been evolving and taking an important role in the multi-domain information exchange on the Internet. Although the QoS parameters required by the multimedia applications are well known and some form of guaranteed QoS is available at transport and network layers, there is no standard QoS specification enabling to deploy the underlying mechanisms in ...