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

共 2534 条记录，以下是2021-2030 订阅

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Proceedings: 2002 IEEE International Symposium on Circuits and systems

Proceedings: 2002 IEEE International Symposium on Circuits a...

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2002 IEEE International Symposium on Circuits and systems

This Volume 1 of 5 of the conference proceedings contains 231 papers. Topics discussed include digital signal processing, adaptive filtering, multimedia over internet protocol and over wireless networks, VLSI arithmetic architectures, system level issues, digital to analog conversion, radio frequency mixers, analog testability, interconnect modeling and optimization, multiple antenna systems, cellular neural networks, stability and control, wireless communication architectures, system design, transconductance and low voltage amplifiers, physical design, multimedia communication and transmission, bifurcation and chaos, FIR filter design and implementation, low power VLSI systems, analog to digital conversion, radio frequency filter systems, filter theory and linear networks, analog modeling, testing, communication theory, `nonlinear circuit analysis methods, microelectromechanical devices, hardware implementation for multimedia, image compression, multidimensional signal processing, filter banks, channel coding architecture and pipelined analog to digital conversion.

关键词： Electric network analysis

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networked sensor communications for the objective force

Networked sensor communications for the objective force

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conference on Unattended Ground Sensor Technologies and Applications IV

作者： Nemeroff, JL Garcia, L DiPierro, S Hamilton, BA USA CECOM RDEC Space & Terr Commun Directorate Ft Monmouth NJ USA

ISBN: (纸本)0819444936

The US Army's Future Combat systems (FCS) and Objective Force will rely heavily on the use of unattended sensor net-works to detect, locate and identify enemy targets in order to survive with less armor protection on the future battlefield. Successful implementation of these critical communication net-works will require the collection of the sensor data, processing and collating it with available intelligence, then transporting it in a format conducive to make quick and accurate command decisions based on the latest tactical situational awareness. The networked communications must support both static deployed and mobile ground and air robotic sensors with secure, stealthy, andjam resistant links for sensor fusion and command and control. It is envisioned for broadest application that sensor networks can be deployed in a two-tiered architecture. The architecture includes a lower sensor sub-layer consisting of mixes of acoustic, magnetic and seismic detectors and an upper sub-layer consisting of infrared or visual imagers. The upper sub-layer can be cued by the lower sub-layer and provides a gateway link to the higher echelon tactical maneuver layer networks such as the Tactical Internet. The sensor deployments, networking constraints and reach back distances to Command and control (C2) nodes will be mission scenario specific, however, the architecture will also apply to tactical unattended sensor, munition and robotic applications. Technologies from the Army Research Laboratory, Defense Advance Research Projects Agency (DARPA), and commercial will be leveraged for this effort.

关键词： Sensors Unattended ground sensors Sensor networks network architectures Telecommunications Fluorescence correlation spectroscopy Magnetic sensors Image processing Situational awareness sensors Unattended sensors

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Modeling and Simulation Analysis of the Performance of Application-Level communication between Distributed Objects

Modeling and Simulation Analysis of the Performance of Appli...

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Proceedings of the First International conference on Information Technology and Applications (ICITA 2002)

作者： Yamada, Hiroshi Nippon Telegraph/Tel. Serv. I.L. 9-11 Midori-Cho 3-Chome Musashino-Shi Tokyo 180-8585 Japan

ISBN: (纸本)1864671149

Almost all business processes among enterprise activities use information technology (IT) systems. These days several applications are integrated to implement more useful services. In addition, IT systems and networks are becoming larger and more complex in order to satisfy severe business requirements. The performance of a business process is largely dependent on the IT system performance. Therefore, the performance design and management of the IT system are becoming more important issues. They must be viewed from an application perspective, and application transactions need to be tracked end-to-end through the entire infrastructure including client nodes, protocols, network configurations, server architectures, and other components. In this paper, I introduce the performance design approach concept called ITAP (IT System architecture Planning) approach by integrating and leveraging Business Process Modeling, Application Traffic Profiling, and network Simulation, Benchmarking. As a case study, I evaluated the performance of three application-level communication protocols: fan-out, pipeline, and ordered synchronous request/response communication protocols, using the ITAP approach. Given the activity diagrams that represent the ways for the initiating process running on the broker server to receive the sub application services running on the remote servers, I developed simulation modules that represent the dynamics of these application-level communication protocols and performed simulation experiments.

关键词： Information technology

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Distributed mission operations with the Multi-mission Encrypted communication System

Distributed mission operations with the Multi-mission Encryp...

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2002 IEEE Aerospace conference

作者： Steinke, Robert C. Backes, Paul G. Norris, Jeffrey S. Jet Propulsion Lab. California Inst. of Technol. 4800 Oak Grove Drive Pasadena CA 91109-8099 United States

ISBN: (纸本)078037231X

The traditional model of mission operations is centralized with all activities taking place at a single location. The Multi-mission Encrypted communication System (MECS) is a tool for enabling distributed operations where scientists and engineers at several locations collaborate over the Internet to perform mission operations activities. There are many reasons why distributed operations are desirable. Travel and facilities costs can be reduced. Disruption can also be reduced both at the mission operations facility which no longer has to house remote participants, and in the lives of remote participants who no longer have to leave their homes for weeks at a time. Finally, the level of participation can be increased leading to greater return from a mission. The MECS architecture is centered around maintaining cached file replicas in a consistent state on remote machines. Challenges that are addressed by NECS include security, compatibility with legacy applications, clients that disconnect and reconnect to the network frequently, and user interface issues involved in keeping users informed when files are created or modified. This paper discusses MECS' architecture for distributed operations and lessons learned from a field test in May 2001. © 2002 IEEE.

关键词： User interfaces

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Dynamic channel access for the next generation NASA mission network

Dynamic channel access for the next generation NASA mission ...

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20th AIAA International communication Satellite systems conference and Exhibit, ICSSC 2002

作者： Lin, L. Hadjitheodosiou, M. Center for Satellite and Hybrid Communication Networks University of Maryland College Park MD 20742 United States

ISBN: (纸本)9781624101113

There is considerable interest in developing small satellites for quick-turnaround missions to investigate near-earth phenomena from space. In this paper we investigate medium access control (MAC) issues related to the migration from the current pre-planned Mult iple Access operation mode to the next generation on-demand mode focusing on NASA missions in near earth orbits. For this new scenario, in order to meet the objective of bandwidth-efficient communications support while guaranteeing specific QoS requirements, a detailed investigation of the suitability of MAC schemes is performed. Performance measures of interest include end-to-end delay and successful throughput. A reservation-based Demand TDMA protocol is proposed for this dynamic scenario. Using simulation, we compare the system's performance under a reservation-based demand-assigned multiple-access channel allocation scheme with that obtained under a static fixed-assigned scheme. Simulation results demonstrate that on-demand mode would be a suitable strategy for next -generation NASA space mission and can offer more efficient performance in a situation where spacecraft have unpredictable bursty traffic transmission patterns. © 2002 by the American Institute of Aeronautics and Astronautics, Inc. all rights reserved.

关键词： Medium access control

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The emerging intelligent optical network: now a reality

The emerging intelligent optical network: now a reality

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optical Fiber communication (OFC) conference

作者： B.G. Cortez Highway college Chang'an University Xi'an China

ISBN: (纸本)1557527008

The nationwide AT&T Intelligent optical network is being deployed with the new intelligent network elements to create a network with reduced capital cost, simplified operations, improved performance and reliability, with the ability to quickly support new services. The mesh architecture and the new control plane are keys to making this network a reality.

关键词： Intelligent networks optical fiber networks Circuits Signal restoration Routing Bandwidth Joining processes Costs Switches control systems

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A demonstration of fast optical bidirectional line switched ring protection in IP-based optical switching network

A demonstration of fast optical bidirectional line switched ...

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optical Fiber communication (OFC) conference

作者： M. Hayashi M. Daikoku T. Otani S. Yamamoto M. Suzuki KDD Research and Development Laboratories Inc. Saitama Japan

ISBN: (纸本)1557527008

The OBLSR protection architecture using the ONPE was introduced into the IP network. The all-optical protection effectively achieved a faster protection of IP packets than OSPF-based IP layer protection. We demonstrated the protection time for IP layer to be less than 21 milliseconds in a 500 km bi-directional ring network by using the OBLSR protection and the proper guard time of IP routers.

关键词： optical fiber networks Bidirectional control Protection Intelligent networks Telecommunication traffic Passive optical networks Fabrics Routing protocols optical control Internet

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Experimental investigation of an all-optical circuit for controlling cell/packet traffic congestion

Experimental investigation of an all-optical circuit for con...

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optical Fiber communication (OFC) conference

作者： Ki-Hwan Park W. Chujo Baric and Advanced Rerearch Division CRL Koganei Japan

ISBN: (纸本)1557527008

We have proposed and described an all-optical circuit for the control of traffic congestion in a system with self-routing cells/packets. The operation of the circuit was successfully demonstrated by an experiment. We are sure that this scheme provides a useful step towards the realization of an all-optical ultra-fast transmission system.

关键词： Switching circuits optical buffering Erbium-doped fiber amplifier Wavelength division multiplexing control systems High speed optical techniques optical sensors optical switches communication system traffic control optical network units

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communication infrastructure design for strategic power infrastructure defense (SPID) system

Communication infrastructure design for strategic power infr...

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IEEE Winter Meeting Power Engineering Society

作者： Bin Qiu Yilu Liu A.G. Phadke Bradley Department of Electrical Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA

ISBN: (纸本)0780373227

Power systems can become vulnerable in the face of possible power system abnormalities. To maintain system reliability becomes a serious concern for the future. The SPID project was launched by EPRI/DoD to understand the origin and nature of catastrophic failures and to develop defense strategies and technologies that will significantly reduce the vulnerability of the power system infrastructure. The approach is characterized by the extensive use of network and real time information from diverse sources, coupled with the development of an evolving dynamic decision event tree. This paper examines the communication issues for the SPID system including information transmission network design and data exchange architecture design. A communication infrastructure design for the SPID system is also proposed. Rather than specifying the detailed network design, the paper provides an overview of the architecture issues.

关键词： communication system control Power system protection Power system reliability control systems Bandwidth Monitoring AC generators Power generation Maintenance Power system dynamics

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A packet pre-classification CSMA/CA MAC protocol for IP over WDM ring networks

A packet pre-classification CSMA/CA MAC protocol for IP over...

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International conference on communication systems

作者： Wen-Ping Chen Wen-Shyang Hwang Department of Electrical Engineering National Kaohsiung University of Applied Sciences Kaohsiung Taiwan

ISBN: (纸本)0780375106

A packet pre-classification MAC (media access control) protocol based on carrier sense multiple access with collision avoidance (CSMA/CA) scheme has been investigated for supporting IP packet over the all-optical WDM ring networks. The intention of the protocol is to increase throughput of IP over optical networks in metropolitan area network (MAN). This protocol avoids both packet collision and packet fragmentation. In order to improve the utilization of network, the packets transmitted from local area network (LAN) are pre-classified into various class queues of access point (AP) according their length. Simulations had been done to evaluate the performance of the protocol, and the simulation results show extraordinarily good network efficiency.

关键词： Multiaccess communication Media Access Protocol Wavelength division multiplexing WDM networks Access protocols Collision avoidance Throughput optical fiber networks Metropolitan area networks optical fiber LAN

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