Differentiated service

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

Method of accessing multiple services from multiple service providers

Abstract: A server system provides a client system with access to a number of services. For each service, if a given service provider is overloaded (or if the client is unable to contact that provider), the client can contact any other of the service providers capable of providing the requested service. The server system provides information to the client system identifying a list of services that the server system provides. For each service in the list of services, the information includes a service name identifying the service, and at least one unique port identifying each service provider for that service so that one service name can be used in accessing the multiple service providers that provide the desired service. The request from the client includes a service name identifying the desired service provided by the server system, and includes at least one port corresponding to a service provider that provides the desired service, the port being selected from the ports provided by the server system.

System and method for analyzing and coordinating Service-Level-Agreements (SLA) for Application-Service-Providers (ASP)

Abstract: The present invention describes a system for automatically monitoring and managing Service Level Agreements on behalf of Service providers (such as Application Service providers) The system is based on a specialized SLA language that can translate complex or simple Service Level Agreements into measurable and controllable criterion The system enables Application Service providers to set up customized Service Level Agreements with customers, and monitor, modify and control all aspects of these agreements, including billing, sales, Customer Relation Management, customer support and Quality of Service The technology on which the present invention is based is a formula driven language that translates Service Level Agreement details into commands As such these details can be tracked and processed to produce detailed reports and summaries

A framework for multi-level SLA management

Abstract: Service-Oriented Architectures (SOA) represent an architectural shift for building business applications based on loosely-coupled services. In a multi-layered SOA environment the exact conditions under which services are to be delivered can be formally specified by Service Level Agreements (SLAs). However, typical SLAs are just specified at the customer-level and do not allow service providers to manage their IT stack accordingly as they have no insight on how customer-level SLAs translate to metrics or parameters at the various layers of the IT stack. In this paper we present a technical architecture for a multi-level SLA management framework.We discuss the fundamental components and interfaces in this architecture and explain the developed integrated framework. Furthermore, we show results from a qualitative evaluation of the framework in the context of an open reference case.

A Model for Web Service Discovery with QoS Constraints

Abstract: Quality of Service (QoS) describes the capabilities of a product or service to meet the requirements of consumers. The provision of guaranteed QoS is very critical to the success of web services in mission critical business domains. How to dynamically select web services that can best meet the requirements of consumers is an ongoing research direction in web service community. This paper proposes a model for web service discovery with QoS constraints called WSDM Q. A set of QoS categorization tModels and a kind of reputation categorization tModel are defined in the model to describe the QoS attributes of a service and the degree of guaranteed QoS delivered by a service respectively. The concept of quantification is introduced in the model to transform between the QoS attributes and QoS categorizations. Furthermore, a negotiation mechanism is used to allow admission control on the service provider side; a feedback mechanism is adopted to allow dynamic evaluation and adjustment of reputation of web services. Because of no need for changes in the inner implementation of UDDI service, it is easy to implement the model through the direct extension to the existing UDDI services. The authors have implemented a prototype based on Microsoft.Netf platform and Microsoft UDDI service.

Pricing and Routing Mechanisms for Differentiated Services in an Electric Vehicle Public Charging Station Network

Abstract: We consider a Charging Network Operator (CNO) that owns a network of Electric Vehicle (EV) public charging stations and wishes to offer a menu of differentiated service options for access to its stations. This involves designing optimal pricing and routing schemes for the setting where users cannot directly choose which station they use. Instead, they choose their priority level and energy request amount from the differentiated service menu, and then the CNO directly assigns them to a station on their path. This allows higher priority users to experience lower wait times at stations, and allows the CNO to directly manage demand, exerting a higher level of control that can be used to manage the effect of EV on the grid and control station wait times. We consider the scenarios where the CNO is a social welfare-maximizing or a profit-maximizing entity, and in both cases, design pricing-routing policies that ensure users reveal their true parameters to the CNO.