Journal ArticleDOI
QoS issues in Web services
TLDR
QoS measures can include the maximum throughput or a function that describes how throughput varies with load intensity, which can be measured in terms of arrival rates (such as requests per second) or number of concurrent requests.Abstract:
Quality of service (QoS) is a combination of several qualities or properties of a service, such as: availability is the percentage of time that a service is operating; security properties include the existence and type of authentication mechanisms the service offers, confidentiality and data integrity of messages exchanged, nonrepudiation of requests or messages, and resilience to denial-of-service attacks; response time is the time a service takes to respond to various types of requests; Response time is a function of load intensity, which can be measured in terms of arrival rates (such as requests per second) or number of concurrent requests. QoS takes into account not only the average response time, but also the percentile of the response time; and throughput is the rate at which a service can process requests. QoS measures can include the maximum throughput or a function that describes how throughput varies with load intensity. The QoS measure is observed by Web services users. These users are not human beings but programs that send requests for services to Web service providers. QoS issues in Web services have to be evaluated from the perspective of the providers of Web services and from the perspective of the users of these services.read more
Citations
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Journal ArticleDOI
Agent-based communities of web services: an argumentation-driven approach
Jamal Bentahar,Zakaria Maamar,Wei Wan,Djamal Benslimane,Philippe Thiran,Sattanathan Subramanian +5 more
TL;DR: A formal and computational persuasive and negotiation protocol to manage the attraction and retainment of Web services in the communities and their identification for composite services is presented.
Proceedings ArticleDOI
Differential QoS support in Web Services Management
TL;DR: This paper presents WS-DiffServ, a service differentiation middleware based on prioritization which leverages service requestor profile to classify service requests and presents the design of a priority based differentiated responsiveness platform for Web services.
Book ChapterDOI
A novel genetic algorithm for qos-aware web services selection
TL;DR: Experiments on QoS-aware web services selection show that the genetic algorithm with this matrix can get more excellent composite service plan than the genetic algorithms with the one dimension coding scheme, and that the two policies play an important role at the improvement of the fitness of genetic algorithm.
Journal ArticleDOI
Channel quality estimation metrics in cognitive radio networks: a survey
TL;DR: This study presents a survey on several channel quality estimation metrics such as bit error rate, signal-to-interference-plus-noise ratio, outage probability, channelquality estimation index, spectrum sensing accuracy of secondary user, and the idle state duration expectation.
Journal ArticleDOI
Domain-Specific Service Selection for Composite Services
TL;DR: This work proposes a domain-specific service selection mechanism and system implementation to address the issue of runtime adaptation of composite services that implement mission-critical business processes using quality of service (QoS) as a means to specify rigid dependability requirements.
References
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Journal ArticleDOI
Unraveling the Web services web: an introduction to SOAP, WSDL, and UDDI
Francisco Curbera,Matthew J. Duftler,Rania Khalaf,William A. Nagy,Nirmal K. Mukhi,Sanjiva Weerawarana +5 more
TL;DR: This tutorial explores the most salient and stable specifications in each of the three major areas of the emerging Web services framework, which are the simple object access protocol, the Web Services Description Language and the Universal Description, Discovery, and Integration directory.
Journal ArticleDOI
Session-based admission control: a mechanism for peak load management of commercial Web sites
Ludmila Cherkasova,P. Phaal +1 more
TL;DR: It is shown that a Web server augmented with the admission control mechanism is able to provide a fair guarantee of completion, for any accepted session, independent of a session length, which is a critical requirement for any e-business.