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Service level

About: Service level is a research topic. Over the lifetime, 7647 publications have been published within this topic receiving 126093 citations. The topic is also known as: service level.


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Proceedings ArticleDOI
01 Nov 2013
TL;DR: The design of PolicyCop is presented, an open, flexible, and vendor agnostic QoS policy management framework targeted towards OpenFlow based SDN that provides an interface for specifying QoS SLAs and then exploits the control plane's API to enforce them.
Abstract: Network management is becoming increasingly challenging with the relentless growth in network size, traffic volume, and the diversity in QoS requirements. Traditionally, the concept of predefined Service Level Agreements (SLAs) has been utilized to establish QoS parameters. However, most state-of-the-art technologies in this area are both proprietary and inflexible. To this end, Software Defined Networking (SDN) has the potential to make network management tasks flexible, scalable, and an open platform to encourage innovation. In this paper, we present the design of PolicyCop, an open, flexible, and vendor agnostic QoS policy management framework targeted towards OpenFlow based SDN. PolicyCop provides an interface for specifying QoS SLAs and then exploits the control plane's API to enforce them. PolicyCop also monitors the network and autonomically readjusts network parameters to meet customer SLAs. We present experimental results to demonstrate PolicyCop's effectiveness in ensuring throughput, latency, and reliability guarantees.

148 citations

Patent
20 Jan 2006
TL;DR: In this article, a method of generating and applying a set of policy rules for enforcement by a policy enforcement function at a node of a communication network, routing packet flows to and from users of the network, is presented.
Abstract: A method of generating and applying a set of policy rules for enforcement by a policy enforcement function at a node of a communication network, said node routing packet flows to and from users of the network. The method comprises, at a service level control function, determining source and destination addressing information for a packet flow to be transported through said node. The addressing information is sent to a policy rules generating function, the policy rules generating function maintaining or having access to service and mobility policies for users of the communication system. At the policy rules generating function, said set of policy rules is generated on the basis of the source and destination addressing information and the appropriate service and mobility policies. The generated set of policy rules is sent to the policy enforcement function, and applied to traffic flows.

147 citations

Patent
29 Mar 2007
TL;DR: In this article, a method of provisioning one or more resources in a distributed computing network to ensure compliance with a service-level agreement associated with a computer application is described, where techniques are disclosed for network distribution and provisioning of applications, such as transactional applications and parallel applications, across multiple administrative domains.
Abstract: Techniques are disclosed for network distribution and provisioning of applications, such as transactional applications and parallel applications, across multiple administrative domains that ensure compliance with service level agreements. For example, a method of provisioning one or more resources in a distributed computing network to ensure compliance with a service level agreement associated with a computer application includes the following steps. Network performance is monitored between a local domain and one or more cooperating domains connected to the local domain by network paths. A present or predicted violation of the service level agreement is identified based on at least a portion of results of the monitoring step. One or more cooperating domains are selected that can effect compliance with the service level agreement by instantiating one or more network resources within at least one of the selected cooperating domains in response to a request from the local domain. Reconfiguration of the local domain is effectuated to allow the computer application to make use of the one or more newly instantiated network resources within the selected cooperating domain.

147 citations

Journal ArticleDOI
TL;DR: A decentralized auction-based approach to pricing of edge-allocated bandwidth in a differentiated services Internet with an explicit necessary and sufficient condition for the stability of the game is constructed, which determines the sustainability of any set of service level agreement configurations between Internet service providers.
Abstract: This paper presents a decentralized auction-based approach to pricing of edge-allocated bandwidth in a differentiated services Internet. The players in our network economy model are one raw-capacity seller per network, one broker per service per network, and users, to play the roles of whole-sellers, retailers, and end-buyers, respectively, in a two-tier wholeseller/retailer market, which is best interpreted as a "sender-pay" model. With the progressive second price auction mechanism as the basic building block, we conduct a game theoretic analysis, deriving optimal strategies for buyers and brokers, and show the existence of networkwide market equilibria. In addition to pricing, another key consideration in building differentiated network services is the feasibility of maintaining stable and consistent service level agreements across multiple networks where demand-driven dynamic allocations are made only at the edges. Based on the proposed game-theoretic model, we are able to construct an explicit necessary and sufficient condition for the stability of the game, which determines the sustainability of any set of service level agreement configurations between Internet service providers. These analytical results are validated with simulations of user and broker dynamics, using the distributed progressive second price auction as the spot market mechanism in a scenario with three interconnected networks, and two services based on the proposed standard expedited forwarding and assured forwarding per-hop behavior.

146 citations

Journal ArticleDOI
TL;DR: This research examines production planning and control for a remanufacturer that can sell returned items on a graded as-is basis or remanufacture the returned items using a GI/G/1 queuing network.
Abstract: This research examines production planning and control for a remanufacturer that can sell returned items on a graded as-is basis or remanufacture the returned items. Using a GI/G/1 queuing network, we model the firms decision to remanufacture an optimal product mix over the long run that maximizes profits while maintaining a desired service level. We further use simulation to explore dispatching heuristics that can be used at the shop-floor level to achieve the desired optimal product mix, while meeting the service level constraint. Our research is grounded in actual practice and the results provide key insights into the decision-making process required to maximize profits and minimize average flow times for remanufactured products.

144 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202321
202257
2021257
2020350
2019413
2018415