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Differentiated service

About: Differentiated service is a research topic. Over the lifetime, 5539 publications have been published within this topic receiving 105225 citations.


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Patent
05 Aug 1998
TL;DR: In this paper, a fault-tolerance service manager is provided as a management interface to a faulttolerant service, which monitors the fault tolerance service, as well as the underlying distributed computer environment, to make globally optimal decisions, based on run-time environmental data.
Abstract: A distributed computing system includes a number of computers, workstations or other computing machines interconnected by a network. One or more service managers are introduced that provide a management interface to corresponding middleware services. The service manager monitors the corresponding middleware service, as well as the underlying distributed computer environment on which an application process that utilizes the middleware service is executing, and allows the middleware service to operate more efficiently, in response to run-time environmental conditions. A fault-tolerance service manager is provided as a management interface to a fault-tolerance service. The fault-tolerance service manager monitors the fault-tolerance service, as well as the underlying distributed computer environment, to make globally optimal decisions, based on run-time environmental data, and to provide the resulting information to the fault-tolerance service. The fault-tolerance service manager can notify the fault-tolerance service about hazardous network conditions (such as object hosts that may crash soon) and the fault-tolerance service may decide to migrate application objects or take other corrective action. The collected environmental data can be used to determine a health rating of components within the computing environment which can be utilized, for example, to select an optimal machine for migration, or to trigger migration or additional replication in the event the health rating indicates that a failure is expected.

38 citations

Proceedings ArticleDOI
24 Jun 2012
TL;DR: This paper proposes an event driven continuous query algorithm for QoS-aware automatic service composition problem to cope with different types of dynamic services and integrated this algorithm in the authors' service composition system, QSynth.
Abstract: Current QoS-aware automatic service composition queries over a network of Web services are often one-time innature After a network of Web services is built, such queries are issued once, and answers are found from the scratch The underlying assumption is that the participating Web services are rather static so that their functional and non-functional parameters seldom change However, such an assumption is often baseless New services come and go, service APIs change gradually, and QoS values fluctuate Therefore, a support for efficiently handling "continuous" service composition queries is desired In this paper, we propose an event driven continuous query algorithm for QoS-aware automatic service composition problem to cope with different types of dynamic services Moreover, we integrated this algorithm in our service composition system, QSynth Finally, we evaluate our proposal using both real QoS data and synthetic Web service data and show the superior performance of ours, compared to the state-of-the art solution which won the performance championship of Web Service Challenge in 2009 and 2010

38 citations

Proceedings ArticleDOI
Vishal Dwivedi1, Naveen Kulkarni1
23 Sep 2008
TL;DR: This work defines what a business service would be like, vis-a-vis its corresponding business function, and how it could be realized through data, utility, information and other services, and presents its service identification approach which utilizes process maps and service hierarchies.
Abstract: The raison dpsilaetre for Web-services is that they could be used to compose new services. As in process centric systems, wherein blocks of software implement a functional domain through a set of linked activities, a SOA based system modeled through Web-services, requires business services (of low granularity) which implement various business functions. Such business services could not only ensure a high degree of re-use but could also help in realizing service oriented architecture in its true sense. Although today quite a few approaches for the problem exist, but most of them are bottom up solutions, or mainly focus on domain decomposition and composite service formation. Not many of them have yet utilized the full potential of business processes, which form the backbone of any enterprise. In this work we define what a business service would be like, vis-a-vis its corresponding business function, and how it could be realized through data, utility, information and other services. We present our service identification approach which utilizes process maps and service hierarchies and towards the end we discuss some of our current work in building an automation tool (named SQUID) for service identification.

38 citations

Journal ArticleDOI
01 Apr 2004
TL;DR: The original workflow metaphor, which directs the design of process support from a mass production point of view, is questioned and replaced by a more suitable concept, which considers social and quality aspects in service delivery.
Abstract: The designing of IT support for the management of inter-organizational service processes inherits the full complexity of aspects dealt with in approaches altering, automating, and supporting these processes in general--and it needs to go beyond. As customer concerns, especially in long-lasting processes, may change over time, support has to provide flexible service, adjustments among different providers, and opportunities to care for the customer. With serviceflow management (SFM) we argue in favor of putting these service-related aspects in the center of modeling, design and architectures. Its conceptual distinction between the serviceflow (as the portion of the process where the customer's concern is evaluated and cared for) and background processes enables SFM (1) to guide providers as well as designers to focus on service design and delivery, (2) to provide support for serviceflows with enhanced flexibility and service configuration, and (3) to suggest the design of service points where service workers and customers "meet". Thus the original workflow metaphor, which directs the design of process support from a mass production point of view, is questioned and replaced by a more suitable concept, which considers social and quality aspects in service delivery. Instance-based XML process representations, generic components and architectures for their exchange as well as for the provision of service tasks are presented and discussed, exemplified by an e-health process.

38 citations

Patent
Mark David Bellows1
27 Nov 2002
TL;DR: In this paper, a method and apparatus for implementing automatic congestion avoidance for differentiated service flows in a communications network is provided, where a bandwidth control signal representing congestion information is identified and dual transmit probabilities are calculated for each flow.
Abstract: A method and apparatus are provided for implementing automatic congestion avoidance for differentiated service flows in a communications network. A bandwidth control signal representing congestion information is identified. Responsive to the identified bandwidth control signal, dual transmit probabilities are calculated for each flow. The dual transmit probabilities include a first transmit probability for a first color and a first transmit probability for a second color. A marked color for a packet is identified. The marked packet color and the calculated dual transmit probabilities are selectively utilized for making a packet discard determination.

38 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20224
202118
202023
201939
201836
201789