Web service QoS (Quality of Service) is a key factor for users to evaluate and select services. Traditionally, run-time QoS of web services stores in centralized QoS registry, which may have performance and availability problems. In this paper, we propose a P2P (Peer-to-Peer) QoS registry architecture for web services, named Q-Peer. Q-Peer is an unstructured P2P system. Query of QoS is naturall...

The creation and wide use of new high quality demanding services (VoIP, High Quality Video Streaming) and the delivery of them over already saturated core and access network infrastructures have created the necessity for E2E QoS provisioning. Network Providers use at their infrastructures several kinds of mechanisms and techniques for providing QoS. Most known and widely used technologies are M...

Security and quality of service (QoS) are two critical network services in today’s inter-networked world. Security mechanisms are used to provide proof of identity, preserve protected information, and ensure that information received has not been tampered with. Quality of service enables multi-media and other real-time services to use public data networks instead of a more expensive dedicated n...

As more and more Web services are deployed, Web service’s discovery mechanisms become essential. Similar services from different sources often exhibit quite different Quality of Service (QoS) levels. For service selection and management purpose, it is necessary to explicitly, precisely, and flexibly specify various constraints and QoS metrics for Web services descriptions. This chapter provides...

Quality of service (QoS) optimization for end-to-end (e2e) services always depends on performance analysis in cloud-based service delivery industry. However, performance analysis of e2e services becomes difficult as the scale and complexity of virtualized computing environments increase. In this paper, the authors present a novel hierarchical stochastic approach to evaluate the QoS of e2e virtu...

Several Quality of Service (QoS) architectures and mechanisms have been proposed by standardisation bodies. However, those proposals were not always aligned with the spirit of IP networks. Furthermore, most research activities have focused to date on supporting QoS only within a single administrative domain. In this paper, we demonstrate that it is possible to provision QoS-enabled services tha...

Improvements of Internet technology during the last decade have shifted the technical focus from reachability to the quality of communication. There are many technical frameworks, such as Integrated Service and Differentiated Services, which have been standardized to assure the quality of communication. QoS routing is also one of such frameworks. It changes or fixes a route that IP datagrams ta...

The development of e-Health services in rural environments, where broadband networks are usually not accessible, requires a specific analysis of available resources to improve Quality of Service (QoS) management. This work quantifies the maximum number of simultaneous users that fulfill the specific QoS levels in common e-Health services, including both store-andforward and real-time telemedici...

The Universal Description Discovery & Integration (UDDI) is a specification for XML registry that enables functionality-based publication and discovery of Web services. This paper presents a UDDI extension to support Quality of Service (QoS) management in the context of Business Process Management Systems (BPMSs). To allow service selection according to functional and nonfunctional requirements...

Web service composition enables seamless and dynamic integration of Web services. The behavior of participant Web services determines the overall performance of a composition. Therefore, it is important to choose high quality services for service composition. Existing Web service selection and discovery approaches rely on non-functional aspects (also known as quality of service or QoS) e.g., re...