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检索条件"任意字段=5th IEEE International Conference on Distributed Computing in Sensor Systems"

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Perimeter Security at San Francisco international Airport: Leveraging Independent, Existing systems to Form an Integrated Solution

Perimeter Security at San Francisco International Airport: L...

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ieee conference on Technologies for Homeland Security

作者： Barry, Ann S. Dickie, Kim. P. Mazel, David. S. Ross&Baruzzini 350 5th Ave New York NY 10018 USA San Francisco Int Airport San Francisco CA 94128 USA Technol Serv Corp Silver Spring MD 20910 USA

ISBN: (纸本)9781424441785

Perimeter security is a priority issue being addressed worldwide by aviation, marine port, military, and government agencies to counter threats of terrorism. these agencies are pursuing initiatives to find the appropriate combination of techniques that will yield productive and cost-effective solutions. At this conference last year, we presented a solution called SPAN: the Secure Perimeter Awareness Network. this year, we will detail the SPAN solution at San Francisco international Airport. In particular, this paper describes the installation, integration, and testing of multiple systems-where each system has unique capabilities-into a single perimeter security solution. then, we detail how testing of these systems was accomplished in order to derive benefits from each so that the entire system works cooperatively and effectively.

关键词： perimeter security radar and video sensors data fusion common operational picture camera/sensor control policy first responder directives

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An Underwater Acoustic Spread-spectrum System Using RA Coding and Band-pass Signal Acquisition

An Underwater Acoustic Spread-spectrum System Using RA Codin...

引用

5th international conference on Wireless Communications, Networking and Mobile computing

作者： Liu Lanjun Zhang Xiaotong Wang Qin Li Li Univ Sci & Technol Beijing Sch Informat Engn Beijing 100083 Peoples R China Beijing Univ Beijing 100871 Peoples R China

ISBN: (纸本)9781424436927

Aiming at reducing the system complexity, raising communication rate and supporting CDMA based applications, a direct sequence spread spectrum based underwater acoustic communication system is proposed. BPSK/QPSK modulation is used. A RA coding scheme is adopted to reduce the BER. To reduce the phase-acquisition complexity of receiver, a carrier modulation method which lets spread-spectrum code and carrier have the same phase is adopted in transmitter. To raise the communication rate, an architecture of de-spreading, before demodulation is used in receiver. To support CDMA based applications, a band-pass signal acquisition strategy is used in receiver, and the acquisition method is delay correlation acquisition algorithm. Matlab-based simulations and practical system based experiments are carried out. the results show that the system has a good performance at supporting multi-user communication and rejecting multi-path effects. Under a water tank environment, the BER of the system without interference of other users is at 10(-4) order of magnitude, and the BER of the system with interference of two users is at 10(-3) order of magnitude.

关键词： underwater acoustic communication DSSS RA code CDMA wireless sensor networks

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A Real-time Architecture for Automated Wireless sensor and Actuator Networks

A Real-time Architecture for Automated Wireless Sensor and A...

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5th international conference on Wireless and Mobile Communications

作者： Zeng, Yuanyuan Sreenan, Cormac J. Zheng, Guilin Univ Coll Cork Dept Comp Sci Cork Ireland Wuhan Univ Sch Power & Mech Engn Wuhan 430072 Peoples R China

ISBN: (纸本)9780769537504

Wireless sensor and actuator network (WSAN) are composed of a large number of heterogeneous sensors and actuators. In the automated WSAN, sensors are collaborated to monitor the physical phenomenon in the surveillance field, while the actuators are to collect sensing data, process the data and perform appropriate actions without the existence of central controller. Most WSANs are used in the real-time sensing and reaction systems towards physical environment In this paper, we propose a real-time architecture for automated WSAN to bind the latency in applications. In the architecture, we present distributed mechanisms for sensor-actuator event reporting and self-aware coordination to maintain the delay bound sensor-actuator communication. And then we present mechanism for ordered multi-event task assignment, and the acting coordination mechanism to provide efficient reaction and execution of the event task in time. Preliminary simulation results are presented to demonstrate the advantages of our solutions.

关键词： real-time Wireless sensor and actuator Networks communication coordination automated architecture

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Maximizing network lifetime with energy efficient routing protocol for wireless sensor networks

Maximizing network lifetime with energy efficient routing pr...

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2009 5th international conference on MEMS NANO, and Smart systems, ICMENS 2009

作者： Muhamad, Wan Norsyafizan W. Naim, Nani Fadzlina Hussin, Noorafidah Wahab, Norfishah Aziz, Noorhafizah Abd Sarnin, Suzi Seroja Mohamad, Roslina Communication Department Faculty of Electrical Engineering UiTM Selangor Malaysia

ISBN: (纸本)9780769539386

In the research field of Wireless sensor Networks, how to reduce the energy consumption of WSN so that the lifetime of WSN can be prolonged is one of the hottest spots. Wireless sensor networks (WSN) lifetime is either superficial or impractical, which prevents us from thoroughly understanding the efficiency of these proposed routing protocols. Routing protocols have significant impact on the overall energy consumption of sensor networks. this project present variety of maximizing system lifetime wireless sensor networks with different energy consumption. Energy consumption for three routing protocols had been analyzed which are direct communication, minimum transmission energy and low adaptive energy clustering hierarchy. the energy consumption for Low Energy Adaptive Clustering Hierarchy (LEACH) routing protocol give the maximum lifetime compared to the others. Clustering is an energy efficient and scalable way to organize the WSN. the main objective of this research is to maximize the lifetime of the wireless sensor (WSN). Simulation via Matlab shows that by applying energy consumption for LEACH routing protocol had increase the network lifetime by as much as 65.2% compared to DC and MTE. © 2009 ieee.

关键词： Routing protocols

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Mining recent approximate frequent items in wireless sensor networks

Mining recent approximate frequent items in wireless sensor ...

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6th international conference on Fuzzy systems and Knowledge Discovery, FSKD 2009

作者： Ren, Meirui Guo, Longjiang School of Computer Science and Technology Heilongjiang University Harbin China Data Base and Parallel Computing Key Laboratory of Heilongjiang Province China School of Computer Science and Technology Harbin Institute of Technology China

ISBN: (纸本)9780769537351

Mining Frequent Items from sensory data is a major research problem in wireless sensor networks(WSNs) and it can be widely used in environmental monitoring. Conventional Lossy Counting algorithm can be applied to solve this problem in centralized manner. However, centralized algorithm brings severely data collision in WSNs, and results in inaccurate mining results. In this paper, we present D-FIMA, a distributed frequent items mining algorithm. D-FIMA, running at every sensor node, establishes items aggregation tree via forwarding mining request beforehand, and each node maintains local approximate frequent items. the root of the aggregation tree outputs the final global approximate frequent items. theoretical analysis and the simulation results show that energy consumption of D-FIMA is much less than the centralized algorithm, and mining results of D-FIMA is more accurate than the centralized algorithm. © 2009 ieee.

关键词： sensor nodes

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distributed technology for global control

Distributed technology for global control

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5th international conference on Informatics in Control Automation and Robotics, ICINCO 2008

作者： Sapaty, Peter Simon Institute of Mathematical Machines and Systems National Academy of Sciences Glushkova Ave 42 Kiev 03187 Ukraine

ISBN: (纸本)9783642002700

A flexible, ubiquitous, and universal solution for management of distributed dynamic systems will be presented. It allows us to grasp complex systems on a higher than usual, semantic level, penetrating their infrastructures, also creating and modifying them, while establishing local and global dominance over the system organizations and coordinating their behavior in the way needed. the approach may allow the systems to maintain high runtime integrity and automatically recover from indiscriminate damages, preserving global goal orientation and situation awareness in unpredictable and hostile environments. © 2009 Springer-Verlag Berlin Heidelberg.

关键词： sensor networks

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A distributed cluster based interference-traffic aware CA for MRMC WMN

A distributed cluster based interference-traffic aware CA fo...

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5th international conference on Wireless Communication and sensor Networks, WCSN-2009

作者： Raju, B. Athota, Kavitha Negi, Atul Department of Computer Science and Engineering JNTUH College of Engineering Hyderabad 500 085 India Department of Computer and Information Sciences University of Hyderabad Hyderabad 500 046 India

ISBN: (纸本)9781424458776

Wireless Mesh Networks (WMNs) have the potential for improving network capacity by employing multiple radios and multiple channels (MRMC). Channel Assignment (CA) is a key issue that plays vital role in defining WMN throughput by efficient utilization of available multiple radios and channels there by minimizing network interference. the two important issues that are needed to be addressed by CA algorithm are Connectivity and Interference. CA problem is proven to be NP-Hard [2] [4]. Further difficulty is added by constraints of varying network conditions such as interference and traffic load. In this paper we propose a distributed Cluster-based Interference-Traffic aware connectivity preserving CA (DCITCA) algorithm. DCITCA involves two phases of operation. In phase 1, first step prepares r-hop clusters in the given network topology where r defines maximum hop distance between any mesh node in the cluster to the cluster head. Second step performs interface-to-link binding to ensures that every link in the network topology receive a communication channel and channel dependency problem is controlled. In phase 2, the channels are assigned to interfaces by selecting least interfering channels in the neighborhood. Interference is measured based on the traffic load carried in the neighborhood. Proposed CA algorithms can be easily implemented on commodity ieee 802.11 hardware. Our simulations demonstrate that proposed algorithm DCITCA reduces overall network interference when compared to existing CoMTaC[7] CA algorithm. ©2009 ieee.

关键词： Network topology

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Scanning task scheduling strategy in distributed vulnerability detection system

Scanning task scheduling strategy in distributed vulnerabili...

引用

5th international conference on Information Assurance and Security, IAS 2009

作者： Wang, Baoyi Li, Jing Zhang, Shaomin Guo, Xueying School of Computer Science and Technology North China Electric Power University Baoding Hebei China

ISBN: (纸本)9780769537443

Reasonable scanning task scheduling strategy can improve the scanning efficiency of vulnerability detection systems at a large extent. Task scheduling problem has been proved to be an NP-complete problem. Based on the request and characteristics of vulnerability detection technology, this paper establishes a distributed scanning task scheduling model, and describes a scanning task distributing algorithm. Genetic algorithms (GA) and ant colony algorithm (ACA) have been widely used to solve various types of NP problem. So far, they have been used to research scheduling algorithms, but there are still some defects. In order to overcome the shortcomings, after having studied the suggested algorithms for scanning task scheduling, a new algorithm that combines genetic algorithm and ant colony algorithm is proposed. Compared with the third reference, the algorithm has better load-balancing rate, stability and convergence. the effectiveness of the algorithm is verified by simulation experiment. © 2009 ieee.

关键词： Scanning

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An energy efficient clustering algorithm for Event-Driven Wireless sensor Networks (EECED)

An energy efficient clustering algorithm for Event-Driven Wi...

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NCM 2009 - 5th international Joint conference on Int. Conf. on Networked computing, Int. Conf. on Advanced Information Management and Service, and Int. Conf. on Digital Content, Multimedia Technology and its Applications

作者： Buyanjargal, Otgonchimeg Kwon, Youngmi Dept. of Information Communication Engineering Chungnam National University Daejeon Korea Republic of

ISBN: (纸本)9780769537696

Wireless sensor networks have found many applications in different areas, including environmental surveillance, intelligent building, health monitoring, intelligent transportations, etc. the sensor networks consist of numerous tiny autonomous wireless devices with limited energy and memory that monitor physical phenomena. therefore, energy efficient algorithms and protocols have been one of the most challenging issues for WSNs. Many researchers have focused on developing energy efficient cluster based protocols for WSNs, but there has not been much research on event driven WSNs and, their focus is on continuous networks. In this paper, we propose a modified algorithm of Low Energy Adaptive Clustering Hierarchy (LEACH) protocol which is a well known energy efficient clustering algorithm for WSNs. Our modified protocol called "Energy Efficient Clustering Algorithm for Event-Driven Wireless sensor Networks (EECED)" is aimed at prolonging the lifetime of a sensor network by balancing energy usage of the nodes. EECED makes the nodes with more residual energy have more chances to be selected as cluster head. Also, we use elector nodes which take the responsibility of collecting energy information of the nearest sensor nodes and selecting the cluster head. We compared the performance of our EECED algorithm with the LEACH protocol using simulations. © 2009 ieee.

关键词： Clustering algorithms

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A Multi-Rate Based Router Placement Scheme for Wireless Mesh Networks

A Multi-Rate Based Router Placement Scheme for Wireless Mesh...

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6th international conference on Mobile Adhoc and sensor systems

作者： Wang, Junfang Cai, Kan Agrawal, Dharma R. Univ Cincinnati Ctr Distributed & Mobile Computing Dept Comp Sci Cincinnati OH 45221 USA Univ British Columbia Dept Comp Sci Vancouver BC V6T1N4 Canada

ISBN: (纸本)9781424451142

Mesh router (MR) placement is one of the fundamental issues that need to be addressed carefully to achieve a desired performance of a wireless mesh network (WMN). the objective of the MR placement schemes is to systematically determine the minimal number of MRs and their positions while satisfying various constraints, such as coverage, connectivity, traffic demand, etc. this paper explores the solution for placing the MRs with multiple transmission rates, which influence both transmission range and wireless link capacity. In the paper, we first formulate the problem with a mixed integer programming model. We then present a heuristic placement algorithm called ILSearch which takes into account both multiple transmission rates and co-channel interference. the ILSearch consists of two components: (1) Coverage MR determination which greedily exploits the capability of each selected MR to cover mesh clients (MCs);and (2) Relay MR determination that incrementally chooses the additional MRs for traffic relaying through the local search. Our simulation has not only shown that ILSearch can effectively obtain the MR placement that meets all the constraints, but also demonstrated that a MR placement which considers the variable transmission rates outperforms those don't.

关键词： Integer programming

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