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检索条件"任意字段=Conference on All-Optical Communication Systems: Architecture, Control and Network Issues"

共 2518 条记录，以下是2291-2300 订阅

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Evolution of network functions and service conceptions for a new regional Personal-Computer communication system

Evolution of network functions and service conceptions for a...

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conference on Broadband Strategies and Technologies for Wide Area and Local Access networks

作者： Tsuchiya, T Nishio, G Morisaki, M NTT Advertising Inc. (Japan) NTT Multimedia Networks Labs. (Japan)

ISBN: (纸本)0819423572

We have made investigated a new regional Personal-Computer(PC) communication network system for residential users beyond Small Office and Home Office (SOHO)'s users. It provides a cost-effective and user-friendly PC communication environment to community members by supporting connections group communication services with customized audio-visual user-interface and contents, moreover authenticating them on the Media Access control(MAC) destination address of the PC's. The user-interface is designed to start the PC communication without complex setup procedure, The members can use any protocol, because MAC address authentication is independent of the network layer protocol. This group communication services are offered by distributive bulletin board servers with Common Gateway Interface(CGI) and Hyper Text Transfer Protocol(HTTP), which are distinguished from the Net News and primary bulletin board for conventional system. This paper discusses, based on a pilot experiment in a small residential area, the network congestion caused by broadcast traffic and address conflict caused by belong to plural groups at the same time and presents a solution. We also discuss the impact of a new bulletin board server derived from traffic data based on our pilot experiment for interactive and audio-visual group communication. The server is operated by specified CGI program on HTTP server and capable to support a interactive communication environment in World Wide Web.

关键词： Telecommunications networks network security Bridges Computing systems Internet Computer architecture Data communications Multimedia network architectures

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architecture and Implementation for Scalable Transfer of Live Videos in Multimedia Applications

Architecture and Implementation for Scalable Transfer of Liv...

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22nd EUROMICRO conference on Beyond 2000: Hardware and Software Design Strategies, EUROMICRO 1996

作者： Hess, Robert Hutschenreuther, Tino Lehmann, Ralf Schill, Alexander Dresden University of Technology Institute for Operating Systems Databases and Computer Networks Department of Computer Sciences DresdenD-01062 Germany

Todays networks are characterized by heterogeneous environments. Various transmission techniques coexist and offer different bandwidths at different costs, Because of video conferences and similiar applications becoming more and more important this paper presents the architecture of the video communication system "XNetvideo ", which is sealable in terms of SNR {signal to noise ratio)-scaling, image size and frame rate. Xnetvideo is a tool for videotransmission over IP-networks and especially ATM, that was developed at our Institute. The description of this architecture, and the discussion of implementation issues and performance results are the major topics of this contribution. Moreovel;a brief survey of existing tools and architectures in this area is given. © 1996 IEEE.

关键词： network architecture

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Software architecture of broadband distribution in the optical CATV network

Software architecture of broadband distribution in the optic...

引用

International conference on communication Technology (ICCT)

作者： Aesoon Park Kyunghyu Lee Electronics and Telecommunications Research Institute Daejeon South Korea

ISBN: (纸本)0780329163

This paper presents the OAM (operations, administration and maintenance) software architecture of the BRDS (broadband distribution subsystem) for an optical CATV network. We built an optical CATV network called SWAN (socio-cultural welfare advanced network) based on SDH (synchronous digital hierarchy) and FTTH (fiber to the home) technology. The BRDS is one of the SWAN subsystems. The OAM software of the BRDS consists of operating systems and application software. We describe the technical issues such as the implementation aspects, the development environment and the future plan of the OAM software for the BRDS.

关键词： Software architecture Intelligent networks optical fiber networks High speed optical techniques Switches Operating systems Synchronous digital hierarchy Process control Level control Application software

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Experiments in hybrid networking with the advanced communications technology satellite 16th

Experiments in hybrid networking with the advanced communica...

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16th AIAA International communications Satellite systems conference, 1996

作者： Friedman, Daniel Gupta, Sonjai Zhang, Chuanguo Ephremides, Anthony Center for Satellite and Hybrid Communication Networks Institute for Systems Research University of Maryland College ParkMD20742 United States

This paper describes experiments conducted over ACTS that were motivated by the commercial potential of low-cost receive-only satellite terminals operating in a hybrid network environment. The first experiment tested highly adaptive methods of satellite bandwidth allocation in an integrated voice-data service environment. The second involved comparison of FEC and ARQ methods of error control for satellite communication with emphasis on the advantage that a hybrid architecture provides, especially in the case of multicasts. Finally, the third experiment demonstrated hybrid access to databases through the use of Mosaic and compared the performance of internetworking protocols for interconnecting LANs via satellite. © 1996 by the American Institute of Aeronautics and Astronautics, Inc. all rights reserved.

关键词： Satellite communication systems

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An embedded-processor architecture for parallel DSP algorithms 6

An embedded-processor architecture for parallel DSP algorith...

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conference on Advanced Signal Processing Algorithms, architectures, and Implementations VI

作者： Hobson, RF Wong, PS Evenson, SA SIMON FRASER UNIV SCH COMP SCIBURNABYBC V5A 1S6CANADA

ISBN: (纸本)0819422347

A methodology for constructing parallel embedded DSP systems is described. The method uses a software and embedded processor abstraction to help raise the level of problem analysis above the raw state machine concept. Custom architectures are constructed by using multiple copies of a core embedded processor linked together with FIFO memories or other communication structures, and augmented with appropriate high speed data manipulation IO devices. Some field programmability and customization is possible through the use of SRAM program memories. © 1996 SPIE. all rights reserved.

关键词： parallel embedded systems custom DSP ATM User-network Interfaces

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Delay line receiver architecture for all-optical networks

Delay line receiver architecture for all-optical networks

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Proceedings of the 1996 15th Annual Joint conference of the IEEE Computer and communications Societies, INFOCOM'96. Part 1 (of 3)

作者： Chlamtac, I. Fumagalli, A. Suh, C.-J. Boston Univ Boston United States

Resource contention in packet switched all-optical networks is being addressed in this paper through the combined use of fiber delay lines and 2×2 space photonic switches. With this basic approach, also known as Quadro or Switched fiber Delay Lines (SDL), the solution efficiency is linked to its storage capacity, determined by the combined length of the fiber delay lines. In the past, this capacity was given by the number of 2×2 photonic switches used, i.e., the number of stages in the receiver, which limited the solution by cost, mainly determined by the switch component, and by the signal power loss and crosstalk introduced by each switch. This work presents and analyzes the use of 'multi-buffer' fiber delay lines, in Quadro, so termed since in it multiple packets are allowed to be concurrently stored (propagated) on each delay line. In this way the total storage capacity is increased, while the proposed design utilizing novel switch control is shown to significantly improve receiver and network performance, without increasing the number of the 2×2 space photonic switches in the system, i.e., its cost.

关键词： optical communication equipment

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network control and management of a reconfigurable WDM network

Network control and management of a reconfigurable WDM netwo...

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MILCOM, Military communications conference

作者： J.Y. Wei Chien-Chung Shen B.J. Wilson M.J. Post Navesink Research and Engineering Center Bell Communications Research Inc. Red Bank NJ USA

This paper describes a set of software and experiments to demonstrate network control and management capabilities for a reconfigurable wavelength-division-multiplexing (WDM) all-optical network. This work is an early prototype implemented in the first year of the DARPA Multiwavelength optical networking (MONET) Project. The primary goal of the prototype experiment work was to demonstrate and assess the viability of implementing a WDM network's control and management (NC&M) system over a Common Object Request Broker architecture (CORBA) compliant reliable distributed platform. Another goal was to demonstrate the viability of using an embedded optical wavelength to support the NC&M system's data communication channels. This early prototype allows us to gain experience and to lay the foundation for our on-going work to develop the full-featured NC&M system in the MONET project's testbed and field trial experiments. This is an important step towards realizing the overall vision of the MONET project in the development of a flexible, reliable, high-capacity, high-performance cost-effective national optical network based on multi-wavelength fiber-optic technology.

关键词： WDM networks Prototypes optical fiber networks Wavelength division multiplexing Software prototyping Telecommunication network reliability all-optical networks communication system control control systems Data communication

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TCP over ATM: Simulation model and performance results

TCP over ATM: Simulation model and performance results

引用

Proceedings of the 1996 IEEE 15th Annual International Phoenix conference on Computers and communications

作者： Gurski, Remi J. Williamson, Carey L. Univ of Saskatchewan Saskatoon Canada

While the Transmission control Protocol (TCP) generally provides robust performance across many network environments, several researchers have recently identified the poor end-to-end performance achieved by TCP on Asynchronous Transfer Mode (ATM) networks. The performance problems arise for several reasons: (1) a size mismatch between TCP segments and ATM cells;(2) the simple protocols used for segmentation and reassembly in ATM, and for retransmission in TCP;(3) specific `optimizations' in TCP, made primarily for low-bandwidth Internet environments, which do not work well in high speed ATM networks;(4) features (or misfeatures) in most TCP protocol implementations;and (5) subtle interactions between all of these factors. This paper describes a simulation model that we have constructed to study TCP performance on ATM networks, as well as a set of simulation experiments conducted using the model. The TCP model is detailed enough to recreate many of the performance problems identified by other researchers, as well as to evaluate potential solutions to the performance problems. The TCP model adds to the traffic modeling toolkit available in our existing ATM network simulator, and enables the further study of performance issues in TCP over ATM.

关键词： Data communication systems

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A multi-star optical backbone network suitable for distributed microcellular wireless systems

A multi-star optical backbone network suitable for distribut...

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IEEE conference and Exhibition on Global Telecommunications (GLOBECOM)

作者： J. Sharony Hazeltine Corporation Greenlawn NY USA

An optical network architecture suitable for interconnecting base stations in a distributed microcellular wireless communications system is proposed. Base stations are grouped into one-hop subnets of size m each and connected by m/spl times/m star couplers. Each base station is affiliated with several subnets and has a tunable optical transceiver(s) over m distinct wavelength channels. The network can support N=m/sup D/ base stations, where D is the network diameter (typically 2,3). The multicast nature of the architecture lends itself to fast routing and mobility control schemes supporting point to multipoint connections. The network architecture composed of wired and wireless segments, and corresponding addressing and routing schemes are described. The network is highly fault-tolerant, has a self-routing method and a near balanced load which results in high throughput and low delay. These features are discussed together with examples.

关键词： optical fiber networks Spine Base stations optical network units communication switching Land mobile radio cellular systems Mobile communication Portable computers Wireless networks Joining processes

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communication architectures for centralized monitoring and control of power equipment

Communication architectures for centralized monitoring and c...

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International conference on Telecommunications Energy (INTELEC)

作者： M. Hirsch M. Johnson D. Smith Power Systems Lucent Technologies Inc.

In the past, on-site or roving personnel monitored and repaired power equipment. Today, to increase efficiency and reduce costs, there is a trend to monitor equipment from a centralized maintenance location. This location is responsible for monitoring all the equipment sites, responding to alarms, and scheduling service and repair as needed using the most appropriate service personnel. The telecommunication vendor must make many decisions when building the maintenance network. Some of the issues include: number of maintenance sites; type of central monitoring system; type of communication links; messaging protocol; alarms and data to be processed; prioritizing alarms; security; network and element failure; and remote operations. This paper discusses a general networking architecture and specific architectures using examples drawn from two different working systems: Bellcore's Transaction Language 1 (TL-1) and Telefonica de Espana's Sistema de Operacion y Conservacion (SOC). It also speculates on future architectures based on TCP/IP and SNMP protocols.

关键词： Centralized control communication system control Personnel Protocols Costs Buildings Condition monitoring Remote monitoring communication system security Data security

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