The increase in real-time applications such as Voice over IP, audio and video streaming in the public Internet has warranted QoS based routing. But today’s Internet largely supports best effort traffic. Thus, a QoS routing in the best effort environment is required to support real-time applications. Flooding of some QoS attributes (e.g. available bandwidth) have been used for QoS routing. But w...

With the increasing deployment of functionally similar web services by different service providers, nonfunctional aspects, which are often referred to Quality of Service (QoS), play a vital role in ranking web services. Various users may have different priorities of QoS attributes. However, ordinary users are lacking in the ability to map their plain requirements to the obscure technical QoS me...

Service Oriented Computing (SOC) provides a framework for the realization of loosely coupled service oriented applications. Web services are central to the concept of SOC. Currently, research into how web services can be composed to yield QoS optimal composite service has gathered significant attention. However, the number and spread of web services across the cloud data centers has increased, ...

Several approaches dealing with the performance of QoS aware semantic web service composition have been proposed. We describe an approach which took part at Web Services Challenge 2009. It showed good performance even if large service repositories were processed. We discuss the main principles of the used approach and also its further enhancement. The enhancement includes shorter composition ti...

The rapid growth of embedded systems urgently requires methods of improving the development process for these systems. Component-based development (CBD) techniques have been widely studied to enhance the productivity of developing complex applications. These techniques can benefit the software development process for embedded systems as well as other application domains. However, applying CBD t...

Web service technology has gained more important role in developing distributed applications and systems on the Internet. Rapid growth of published Web services makes their discovery more and more difficult. There exist many web services which exhibit similar functional characteristics. It is imperative to provide service consumers with facilities for selecting required web services according t...

Web Services (WS) are an important tool for the integration of enterprise applications. With a growing set of WS related standards (WS-*), the technology has become increasingly more complicated to configure and manage, even more so when the Quality of Service (QoS) requirements of the system are changing. This paper presents the results of a study conducted on the ability of the major Web Serv...

Workflow management systems (WfMSs) have been used to support various types of business processes for more than a decade now. In workflows or Web processes for e-commerce and Web service applications, suppliers and customers define a binding agreement or contract between the two parties, specifying Quality of Service (QoS) items such as products or services to be delivered, deadlines, quality o...

This report describes our approach towards providing quality of service (QoS) guarantees for network communication within the endsystems to support multimedia applications. We first address the problem of QoS specification by identifying a set of application classes and their QoS parameters that cover the communication requirements of most applications. We then describe the QoS mapping problem,...

Contract monitoring is carried out to ensure the Quality of Services (QoS) attributes and levels specified in an electronic contract throughout a business process enactment. This paper proposes an approach to improve QoS monitoring based on the aspect-oriented paradigm. Monitoring concerns are encapsulated into aspects to be executed when specific process points are reached. Differently from ot...