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检索条件"任意字段=2003 IEEE Conference on Open Architectures and Network Programming Proceedings, OPENARCH 2003"

共 74 条记录，以下是11-20 订阅

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OPCA: Robust interdomain policy routing and traffic control

OPCA: Robust interdomain policy routing and traffic control

引用

ieee conference on open architectures and network programming proceedings (openarch 2003)

作者： Agarwal, S Chuah, CN Katz, RH Univ Calif Berkeley Div Comp Sci Berkeley CA 94720 USA

ISBN: (纸本)0780377648

An increasing number of ASes have been connecting to the Internet through the BGP inter-domain routing protocol. With increasing stress on the scale of this system and increasing reliance on Internet connectivity, more participants demand additional functionality from interdomain routing that BGP cannot handle. For example, we believe that the recent trend towards multihomed stub networks exhibits a likely intent to achieve fault tolerant and load balanced connectivity to the Internet. However, BGP today offers route fail-over times as long as 15 minutes, and very limited control over incoming traffic across multiple wide area paths. More research literature and news media are calling for stemming malicious or erroneous routing announcements. We propose a policy control architecture, OPCA, that runs as an overlay network on top of BGP. OPCA allows an AS to make route change requests at other, remote ASes to achieve faster route fail-over and provide capabilities to control traffic entering the local AS. The proposed architecture and protocol will co-exist and interact with the existing routing infrastructure and will allow for a scalable rollout of the protocol.

关键词： Communication system traffic control Fault tolerance ieee news Internet IP networks Joining processes Robust control Routing protocols Stress Traffic control

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Dynamic packet processors -: A new abstraction for router extensibility

Dynamic packet processors -: A new abstraction for router ex...

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ieee conference on open architectures and network programming proceedings (openarch 2003)

作者： Hjálmtysson, G Sverrisson, HF Brynjúlfsson, B Helgason, OR Reykjavik Univ Dept Comp Sci Reykjavik Iceland

ISBN: (纸本)0780377648

The history of the Internet is that of rapid change and adaptability. The simple IP service model and the informal standardization process have fostered rapid evolution of systems and services. However, as the Internet has transformed from an academic playground to an essential commercial infrastructure the service model and the standardization process have become more complex. While outsourcing and optimizations are driving services into the network, the IETF is increasingly the battleground of vendors. Consequently, introducing new services to the Internet has become increasingly complicated. Active and programmable networking is an effort to reclaim the flexibility of the early Internet and reduce the need for standardization. In this paper we introduce a new abstraction, packet processors, to evolve the lower layer router facilities and to extend the programmable interface in a type safe manner. We show how this abstraction is sufficient to capture all facilities commonly found in data-paths of commodity routers and how it gives the ability to introduce new types of packet processors. Packet processors can add type specific methods thereby extending the programmable interface while maintaining the semantic integrity of the Node OS and the Execution Environment. We discuss how paths can be constructed from a sequence of packet processors, and how these paths can cross the services/node OS boundary, and cross hardware processor boundaries. Our measurements show that the added flexibility adds negligible overhead.

关键词： Computer science Hardware History IP networks Kernel Outsourcing programming profession Search engines Standardization Web and internet services

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Transparent and scalable client-side server selection using netlets

Transparent and scalable client-side server selection using ...

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ieee conference on open architectures and network programming proceedings (openarch 2003)

作者： Dharmalingam, K Collier, M Dublin City Univ Sch Elect Engn Res Inst Networks & Commun Engn Dublin 9 Ireland

ISBN: (纸本)0780377648

Replication of web content in the Internet has been found to improve service response time, performance and reliability offered by web services. When working with such distributed server systems, the location of servers with respect to client nodes is found to affect service response time perceived by clients in addition to server load conditions. This is due to the characteristics of the network path segments through which client requests get routed. Hence, a number of researchers have advocated making server selection decisions at the client-side of the network. In this paper, we present a transparent approach for clientside server selection in the Internet using Netlet services. Netlets are autonomous, nomadic mobile software components which persist and roam in the network independently, providing predefined network services. In this application, Netlet based services embedded with intelligence to support server selection are deployed by servers close to potential client communities to setup dynamic service decision points within the network. An anycast address is used to identify available distributed decision points in the network. Each service decision point transparently directs client requests to the best performing server based on its in-built intelligence supported by real-time measurements from probes sent by the Netlet to each server. It is shown that the resulting system provides a client-side server selection solution which is server-customisable, scalable and fault transparent.

关键词： Delay Electronic mail IP networks network servers Performance evaluation Probes Reliability engineering Telecommunication network reliability Web and internet services Web server

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On the fusion and transference of knowledge: Part I

On the fusion and transference of knowledge: Part I

引用

ieee International conference on Information Reuse and Integration (IRI-2003)

作者： Rubin, SH SPAWARS SYST CTR San Diego CA USA

ISBN: (纸本)0780382420

Contemporary neural architectures having one or more hidden layers suffer from the same deficiencies that genetic algorithms and methodologies for non-trivial automatic programming do;namely, they cannot exploit inherent domain symmetries for the transference of knowledge from an application of lesser to greater rank, or across similar applications. As a direct consequence, no ensemble of contemporary neural architectures allows for the effective codification and transference of knowledge within a society of individuals (i.e., swarm knowledge). These deficiencies stem from the fact that contemporary neural architectures cannot reason symbolically using heuristic ontologies. They cannot directly provide symbolic explanations of what was learned for purposes of inspection and verification. Moreover, they do not allow the knowledge engineer to precondition the internal feature space through the application of domain-specific modeling languages. A symbolic representation can support the heuristic evolution of an ensemble of neural architectures. Each neural network in the ensemble imbues a hidden layer and for this reason is NP-hard in its learning performance. It may be argued that the internal use of a neat representation subsumes the heuristic evolution of a scruffy one. It follows that there is a duality of representation under transformation. The goal of Al then is to find symbolic representations, transformations, and associated heuristic ontologics. This paper provides an introduction to this quest. Consider the game of chess for example. If a neural network or symbolic heuristic is used to evaluate board positions, then the best found iterate (i.e., of weights or symbols) serves as a starting point for iterative refinement. This paper will address the ordering and similarity of the training instances in refining subsequent iterates. If we fix the learning technology, then we need to focus on reducing the problem, composing intermediate results, and transfering t

关键词： heuristics information fusion neural network ensembles reuse and transference

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Comparing analytical modeling with simulation for network processors: A case study

Comparing analytical modeling with simulation for network pr...

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Design, Automation and Test in Europe conference and Exhibition (DATE 03)

作者： Gries, M Kulkarni, C Sauer, C Keutzer, K Univ Calif Berkeley Berkeley CA 94720 USA

ISBN: (纸本)0769518702

programming network processors remains an art due to the variety of different network processor architectures and due to little support to reason and explore implementations on such architectures. We present a case study of mapping an IPnu4 forwarding switch application on the Intel IXP1200 network processor and we compare this implementation with an analytical model of both the application and architecture used to evaluate different design alternatives. Our results not only show that we are able to model the IXP1200 and our application within 15% of the accuracy compared to that of IXP1200 simulation, but also find closely matching trends for different workloads. This shows the clear potential of such analytical techniques for design space exploration.

关键词： Analytical models

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Symbolic analysis congestion management

Symbolic analysis congestion management

引用

2003 ieee Bologna PowerTech conference

作者： Škokljev, Ivan Maksimović, Viktor Weber, Harald Electrical Engineering Faculty P.O.Box 35-54 11000 Belgrade Serbia Institut fur Allgemeine Elektrotechnik Universitat Rostock D-18051 Rostock Germany Institut fur Energietechnik Universitat Rostock D-18051 Rostock Germany

ISBN: (纸本)0780379675

This paper provides the novel symbolically oriented approach to open access transmission network congestion management Transactions are the dc load flow symbolic simulator generated transfer functions. Congestion management is conceived as a systematic procedure based on linear programming. The dc load flow symbolic simulator generates all constraints and the black-box optimization library function is used to solve the problem of congestion on a sample power system. © 2003 ieee.

关键词： Linear programming

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Bi-directional high speed network for open system avionics

Bi-directional high speed network for open system avionics

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The 22nd Digital Avionics Systems conference - proceedings

作者： Koenig, James R. The Boeing Company Philadelphia PA United States

Today, the need for a high-speed bi-directional network in avionics is more evident than ever. The need for this proposal is driven by the shortcomings in current avionics architectures based on the MIL-STD-1553 data communication system and associated video distribution network, as well as the current ANSI standard Fiber Channel. Fiber Channel has the potential to be the only network protocol needed for avionics, but to maximize its life cycle cost benefits, a bi-directional implementation is required.

关键词： Avionics

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eLoom: A Specification, Simulation and Visualization Engine for Modeling Arbitrary Hierarchical Neural architectures

eLoom: A Specification, Simulation and Visualization Engine ...

引用

International Joint conference on Neural networks 2003

作者： Xiao, Yunhai Caudell, Thomas Preston Healy, Michael J. University of New Mexico Department of Electrical Engineering Albuquerque NM 87131 United States University of New Mexico University of Washington 13544 23rd Place NE Settle WA 98125 United States

Visualization is a useful method for understanding both learning and computation in artificial neural networks. There are a large number of parameters in a neural network. By viewing these parameters pictorially, a better understanding can be gained of how a network maps inputs to outputs. eLoom is an open source graph simulation tool, developed at the University of New Mexico, that enables users to specify and simulate various neural network models. Its specification language enables users to construct and simulate arbitrary, potentially hierarchical network structures on serial and parallel processing systems. In addition, eLoom is integrated with UNM's Flatland, an open source virtual environments development tool to provide real-time visualizations of the network structure and activity. ART-1 and LAPART-II neural networks are presented to illustrate eLoom and Flatland's capabilities.

关键词： Hierarchical systems

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Intrusion tolerant distributed object systems: Project summary

Intrusion tolerant distributed object systems: Project summa...

引用

3rd DARPA Information Survivability conference and Exposition

作者： Tally, G Whitmore, B Sames, D Matt, B Niebuhr, B Bakken, D Network Associates Laboratories United States Washington State University United States

ISBN: (纸本)0769518974

Intrusion prevention mechanisms and technologies cannot always prevent a well-funded and persistent adversary from penetrating information systems. Middleware is one area where a system can provide intrusion tolerance. Distributed object middleware is considered the most general kind of middleware, and the Common Object Request Broker Architecture (CORBA) is a widely adopted standard for distributed object middleware. The goal of our Intrusion Tolerant Distributed Object Systems (ITDOS) framework is to create an architecture for distributed object systems that can provide high reliability for mission-critical information systems by tolerating Byzantine (arbitrary) faults in object servers. CORBA systems are one of the potential middleware architectures that can be supported by the architecture. From a system-level point of view, this architecture provides additional security in the form of a firewall proxy that can monitor Byzantine fault-tolerant multicast (BFTM) messages at the enclave boundary and minimize the impact of certain denial of service (DoS) attacks. © 2003 ieee.

关键词： Computer architecture Information security Information systems Laboratories Middleware Mission critical systems Monitoring network servers programming profession Voting

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Run-time support for extensible protocol stacks

Run-time support for extensible protocol stacks

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ieee conference on open architectures and network programming

作者： H. Dandekar A. Purtell S. Schwab Network Associates Laboratories Los Angeles CA USA

By implementing an extensible network protocol stack in the AMP operating system, we have demonstrated support for fine-grained replacement of low-level network processing components. Furthermore, our compiler technology approach provides the means to support multiple hardware architectures and a framework for enforcing safety and security properties during runtime code generation. Our preliminary results indicate that our approach is feasible, has comparable per-packet processing costs to static code, and has acceptable per-module loading and code generation costs.

关键词： Runtime Protocols Operating systems Costs Libraries Hardware Vehicle safety Laboratories Computer languages Protection

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