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Ethernet-based integrated surveillance system for homeland security and homeland defense

Ethernet-based integrated surveillance system for homeland s...

conference on Sensors and Command, control, communications and Intelligence (C31) Technologies for Homeland Security and Homeland Defense III

作者： Schooley, MG Thompson, D DRS Technologies Inc. (United States)

ISBN: (纸本)0819453269

This report documents the results of an internal DRS effort to develop an Ethernet based integrated defense system to improve defense of cities, harbors, airports, power production, energy supplies, bridges, monuments, dams and so forth. Results of the integration of multiple SCOUT LPI radars and multiple Electrooptical targeting systems will be provided, illustrating the benefits of interfacing surveillance radars with imaging sensors to confirm detection and provide visual recognition and identification. An analysis of the handover errors will be provided including errors due to;sensor platforms location and orientation uncertainty, target location measurement errors, data latency and motion prediction errors, which contribute to target handoff and the reacquisition timeline. These predictions will be compared to measured results. The system architecture will be defined including;security, support for both stationary and moving sensor platforms, remote control of sensor systems and distribution of imagery through the network and remote diagnostics, maintenance and software upgrades. Growth capabilities include secure wireless communication to/from moving platforms, integration with sonar and seismic sensors, cooperative location of friendly forces and acoustic detection and triangulation of gunshots with automated cueing of sensors and security forces to the shooters most probable location. The use of ad hoc multi-hopping wireless networking supplements hardwire networks, augments disaster response capabilities, provides high-speed communications for moving platforms and supplements GPS outage areas.

关键词： Sensors Radar control systems Acoustics Homeland security Video Surveillance network security Telecommunications Video surveillance

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Designing communication networks for distributed control agents

Designing communication networks for distributed control age...

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1st ORP conference

作者： Camponogara, E Talukdar, S Univ Fed Santa Catarina Dept Automacao & Sist BR-88040900 Florianopolis SC Brazil Carnegie Mellon Univ Dept Elect & Comp Engn Pittsburgh PA 15213 USA

This paper is concerned with a bicriteria combinatorial optimization Problem and its applications to the design of communication networks for distributed controllers. In a bipartite graph, a subset of the edges yields a communication network for which we pay a price but, on the other hand, it induces another network that encompasses the former and for which we receive a reward. The problem is then to find the efficient solutions. The paper delivers an IP formulation for the problem of finding supported solutions, which is shown to be NP-Hard, along with families of strong valid inequalities, which are shown to draw the LP bounds closer to the Pareto optimal frontier. To approximate the frontier, heuristics are integrated in a problem-solving architecture called asynchronous team and then put to the test in two prototypical scenarios. (C) 2003 Elsevier B.V. all rights reserved.

关键词： multiple objective programming multiagent systems combinatorial optimization metaheuristics

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A new header compression scheme for TCP streams in IP based wireless networks

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EUROPEAN TRANSACTIONS ON TELEcommunicationS 2004年第1期15卷 15-32页

作者： Boggia, G Camarda, P Petrizzelli, S Squeo, VG Politecn Bari Dipartimento Elettrotecn & Elettron I-70125 Bari Italy

The current trend in the telecommunication world is the proposal of a universal telecommunication system deriving from the convergence between mobile telephony and data transmission. To achieve such a convergence in an efficient way, it is presumably necessary to utilize a network platform totally based on TCP/IP architecture (an 'all-IP network'). However, the encapsulation process of TCP/IP wastes a substantial part of the radio channel bandwidth for the transmission of control information (header) that does not have any specific function at radio level. Since this bandwidth is generally the most expensive and limited resource for wireless networks, it is necessary to adopt a header compression scheme that can reduce the protocol overhead while working efficiently and robustly under noisy links with time-variant BER conditions. In this paper, a new header compression scheme for TCP streams as a specific header compression profile within the IETF ROHC (robust header compression) framework is proposed and analyzed through simulations exploiting network simulator (ns-2). The proposed scheme, compliant with IETF requirements for TCP/IP header compression, is based on the distinct management of data and acknowledgment (ACK) streams associated with the TCP connection and exploits a robust header encoding technique for reducing the effect of error propagation. The results obtained, in terms of throughput, overhead and goodput, are reported as a function of bandwidth and BER. A comparison with the results obtained without compression allows us to evaluate the performance of the proposed compression scheme in a realistic and dynamic environment. Copyright (C) 2004 AEI.

关键词： encapsulation technology mobile communication Bandwidth Tritolyl Phosphates tactical command post Header Converge Error propagation protocol overhead Telecommunication systems EIS IMPLEMENTATION PLANS Mobile phones Wireless networks compression network simulator

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Survivability issues in IP-MPLS networks

Survivability issues in IP-MPLS networks

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15th International conference on systems Science

作者： Molisz, Wojciech Gdansk University of Technology Faculty of Electronics Telecommunications and Informatics Gabriela Narutowicza 11/12 PI-80-952 Gdansk Poland

A model for survivability assessment of IP-MPLS networks implemented directly in optical transport networks OTN (WDM) is described under assumptions as follows: end-to-end path protection;preplanned node-disjoint, dedicated or shared, backup path for each working path;distributed control of all top-down restoration actions;LSP-to-lightpath mapping minimizing the number of wavelengths converters. Survivability of such networks has a fundamental importance, since a single link cut can affect extremely large traffic volumes. The optimization problem of survivable routing and wavelength assignment (SRWA) can be decomposed into a survivable routing followed by a wavelength assignment optimization problem. They are stated as the mixed integer and integer programming problems, respectively. Unfortunately, they both are NP-complete. Heuristic algorithms are proposed to solve the problems. The presented approach has been verified by means of simulation. Some results of the large number of simulation experiments investigating networks: DARPA, and NSF are described and discussed. Conclusions help in better understanding of survivability issues in IP-MPLS networks. all results are the original contribution and are published for the first time.

关键词： network protocols

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Improving real-time communication between host and motion system in a HWIL simulation

Improving real-time communication between host and motion sy...

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conference on Technologies for Synthetic Environments - Hardware-in-the-Loop Testing IX

作者： Havlicsek, HS Zana, L Acutron USA Inc Pittsburgh PA 15238 USA

ISBN: (纸本)0819453315

The effectiveness of a HWIL facility for developing missile guidance and targeting systems is limited by the quality of the elements that simulate the continuous physical processes. A motion simulator, which stimulates the inertial measurement and targeting sensors, must produce motion that is consistent with the actual physical processes. The effectiveness of a HWIL simulation is progressively degraded by each non-ideal element or process in the loop. The interface between the simulation computer and the motion system is traditionally a problematic link that is resolved once and for all in the Acutrol3000 Motion control instrumentation. This paper focuses on issues relating to data synchronization, time skew correction, multi-rate data smoothing, and reduced state motion vectors. Concepts are addressed and results are presented.

关键词： HWIL motion simulator real-time data reflective memory

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The ASON approach to the control plane for optical networks

The ASON approach to the control plane for optical networks

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International conference on Transparent optical networks

作者： A. Jajszczyk Department of Telecommunications AGH University of Science and Technology Krakow Poland

The paper gives an overview of the automatically switched optical network (ASON), concentrating on its control plane. Drivers for automatically switched optical networks are briefly presented. The ASON architecture, based on transport, control, and management planes, is discussed. Types of connections supported by ASON are described, including permanent, switched, and soft permanent connections. Different kinds of internal and external interfaces are presented. Various issues related to the ASON control plane are enumerated.

关键词： optical control optical fiber networks Automatic control communication system traffic control Resource management optical design Large-scale systems Scalability Protocols control systems

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现场运行全光通信网的优化设计与性能评估

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上海交通大学学报 2004年第5期38卷 669-672,677页

作者：魏威曾庆济欧阳勇唐晓东刘继民肖鹏程黄俊上海交通大学区域光纤通信网与新型光通信系统国家重点实验室上海200030

总结了一个现场运行全光通信网的研究开发成果,给出了包括光分插复用器(OADM)和光交叉连接器(OXC)等网元的优化设计方案,研究了全光通信网控制与管理(NC&M)的设计和实现技术,评估了网络性能的测试结果.测试结果以及开通的网络多媒... 详细信息

总结了一个现场运行全光通信网的研究开发成果,给出了包括光分插复用器(OADM)和光交叉连接器(OXC)等网元的优化设计方案,研究了全光通信网控制与管理(NC&M)的设计和实现技术,评估了网络性能的测试结果.测试结果以及开通的网络多媒体业务稳定运行的实践表明,全光通信网技术是一种理想的城域骨干网传送技术.

关键词：全光通信网优化设计性能评估网络控制与管理

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Differential congestion notification: Taming the elephants

Differential congestion notification: Taming the elephants

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Proceedings of the 12th IEEE International conference on network Protocols, ICNP 2004

作者： Le, Long Aikat, Jay Jeffay, Kevin Smith, F. Donelson Department of Computer Science University of North Carolina Chapel Hill United States

ISBN: (纸本)0769521614

Active queue management (AQM) in routers has been proposed as a solution to some of the scalability issues associated with TCP's pure end-to-end approach to congestion control. A recent study of AQM demonstrated its effectiveness in reducing the response times of web request/response exchanges as well as increasing link throughput and reducing loss rates [10]. However, use of the ECN (explicit congestion notification) signaling protocol was required to outperform drop-tail queuing. Since ECN is not currently widely deployed on end-systems, we investigate an alternative to ECN, namely applying AQM differentially to flows based on a heuristic classification of the flow's transmission rate. Our approach, called differential congestion notification (DCN), distinguishes between "small" flows and "large" high-bandwidth flows and only provides congestion notification to large high-bandwidth flows. We compare DCN to other prominent AQM schemes and demonstrate that for web and general TCP traffic, DCN outperforms all the other AQM designs, including those previously designed to differentiate between flows based on their size and rate. © 2004 IEEE.

关键词： Congestion control (communication)

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Performance of distributed control protocol for WR-OBS systems

Performance of distributed control protocol for WR-OBS syste...

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Asia-Pacific conference on communications

作者： Zhou Lan Hong xiang Guo Jian Wu Jin tong Lin Optical Communication Center Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)0780386019

In the optical burst-switching (OBS) system, IP-over-WDM network has been paid great attention due to its bandwidth efficiency and adaptive traffic load accommodation. However, the abrupt burst for large traffic loads will result in unbearable performance degradation in the traditional JET network. To combat with the load sensitivity, a wavelength-routed OBS (WR-OBS) network architecture was confirmed effective. We have proposed a distributed control WR-OBS network architecture combining JET protocol with a two-way reservation method. Based on this architecture, two new resource reservation protocols are compared by evaluating performance. Computer simulation results demonstrate that improvement of burst blocking probability can be achieved in backward reservation protocol and all these two control protocols outperform traditional JET OBS network.

关键词： Distributed control Protocols Computer architecture Telecommunication traffic Adaptive optics optical fiber networks optical sensors Bandwidth Degradation Computer simulation

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Sensors' network and its application in the intelligent storage security

Sensors' network and its application in the intelligent stor...

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conference on Unmanned and Unattended Sensors and Sensors networks

作者： Zhang, QY Nicolescu, M Jiang, X Zhang, Y Yue, WH Xiao, WH Wuhan Univ Technol Coll Logist Engn Wuhan 430063 Peoples R China

ISBN: (纸本)0819455644

Intelligent storage systems run on different advanced technologies, such as linear layout, business intelligence and data mining. Security, the basic desire of the storage system, has been focused on with the indraught of multimedia communication technology and sensors' network. Along with the developing of science and the social demands, multifarious alarming system has been designed and improved to be intelligentized, modularized and have network connections. It is of great moment to make the storage, and further more, the logistics system more and more efficient and perfect, with modem science and technology. Diversified information on the spot should be caught by different kinds of sensors. Those signals are treated and communicated to the control center to give the further actions. For fire-proofing, broad-spectrum gas sensors, fume sensors, flame sensors and temperature sensors are used to catch the information in their own ways. Once the fire is taken somewhere, the sensors work by the fume, temperature, and flame as well as gas immediately. Meanwhile the intelligent control system starts. It passes the tidings to the center unit. At the same time, it sets those movable walls on to work quickly to obstruct the fire's spreading. While for guarding the warehouse against theft, cut-off sensors, body sensors, photoelectric sensors, microwave sensors and closed-circuit television as well as electronic clocks are available to monitor the warehouse reasonably. all of those sensors work in a net way. The intelligent control system is made with a digital circuit instead of traditional switch one. This system can work in a better way in many cases. Its reliability is high and the cost is low.

关键词： intelligent storage systems security fire-proof network

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