Network and processing overhead associated with web services is a significant challenge to its performance. As a result, web service providers often announce a service level agreement. This ensures that consumers, who pay for the service, can get the service at a given quality level. In this paper, we study the competition between two providers offering functionally the same web services, whe...

In service composition, quality of service is a major criterion for selecting services to collaborate in a process flow to satisfy a certain quality goal. This paper presents an approach for service composition which considers QoS-based service provision schemes and variability of the QoS when planning. The QoS of a service can be stated in terms of complex service provision schemes, e.g. its s...

This paper deals with the problem of quality of service (QoS) in DiffServ IP-based networks. A short review open system interconnection (OSI) framework is given. Then we focus on QoS from provider’s and costumer’s point of view, mainly based on DiffServ concepts. Also, we discuss QoS in IP networks. These networks promise convenient QoS-enabled communication. Finally, we analyze DiffServ in IP ...

In this study, a network quality of service (QoS) evaluation system was proposed. The system used a combination of fuzzy C-means (FCM) and regression model to analyse and assess the QoS in a simulated network. Network QoS parameters of multimedia applications were intelligently analysed by FCM clustering algorithm. The QoS parameters for each FCM cluster centre were then inputted to a regressio...

The development, registration, discovery, and invocation of quality Web services are vital for the successful implementation of applications using Web services. Considerable research focuses on quality for Web services. Unfortunately, current research on Quality of Service (QoS) for Web services is concentrated on service users and the implementation stage. This research highlights the importan...

The Internet has historically offered a single level of service, that of "best effort," where all data packets are treated with equity in the network. However, we are finding that the Internet itself does not offer a single level of service quality, and some areas of the network exhibit high levels of congestion and consequently poor quality, while other areas display consistent levels of high ...

The CORBA Event Service specification lacks important features in terms of quality of service (QoS) characteristics required by multimedia information. The main objective of the work described in this paper is to augment the standard CORBA Event Service specification with a set of extensions, to turn it into an adaptable QoS middleware multimedia framework. To meet this, some extensions to the ...

Increasing popularity of Cloud computing lead to research problem for building high quality cloud application . Quality of service provides valuable information for optimal decision. From the set of functionally equivalent service candidates optimal cloud selection is taken. In this paper different QoS ranking prediction techniques are studied .The techniques are collaborative filtering and clo...