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RFMS: Real-time Flood Monitoring System with wireless sensor networks

RFMS: Real-time Flood Monitoring System with wireless sensor...

引用

ieee Internatonal conference on Mobile Adhoc and sensor systems (MASS)

作者： Jong-uk Lee Jae-Eon Kim Daeyoung Kim Poh Kit Chong Jungsik Kim Philjae Jang Information and Communications University South Korea Sensor Networks Research Inc.

In this paper, we present RFMS, the real-time flood monitoring system with wireless sensor networks, which is deployed in two volcanic islands Ulleung-do and Dok-do located in the East Sea near to the Korean peninsula and developed for flood monitoring. RFMS measures river and weather conditions through wireless sensor nodes equipped with different sensors. Measured information is employed for early-warning via diverse types of services such as SMS (short message service) and a Web service.

关键词： Rivers Real time systems Monitoring Floods Wireless sensor networks Base stations Computer architecture

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A probabilistic replication and storage scheme for large wireless networks of small devices

A probabilistic replication and storage scheme for large wir...

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ieee Internatonal conference on Mobile Adhoc and sensor systems (MASS)

作者： Daniela Gavidia Maarten van Steen Vrije Universiteit Amsterdam Amsterdam Netherlands

Nodes in wireless ad hoc networks are often limited in terms of resources, such as storage, power, and bandwidth. A downside of this is the fact that local storage at one node cannot accommodate the vast amount of data contained in the network. In this paper, we present SharedState, a scheme for storage, replication, and distribution of common-interest data in wireless networks of resource-constrained devices (e.g. sensor nodes or embedded devices). SharedState works under the assumption that individual nodes would greatly benefit from having access to the wealth of information in the network, but are unable to store it locally at once. SharedState strives to make data available to every node by providing local access to a subset of the whole collection of data items in the network at any moment in time and ensuring that this subset is updated periodically. this is accomplished by probabilistic propagation and replication of data items, ensuring the availability and persistence of information in the face of changing network conditions. We evaluate the performance of SharedState by studying the effectiveness with which nodes can gather information from the network. In addition, we optimize the bandwidth usage of our proposed solution by minimizing unnecessary communication based on feedback from the local neighborhood.

关键词： Peer to peer computing Protocols Probabilistic logic Topology Bandwidth Availability Wireless sensor networks

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More is more: the benefits of dense sensor deployment

More is more: The benefits of dense sensor deployment

引用

ieee Internatonal conference on Mobile Adhoc and sensor systems (MASS)

作者： Amotz Bar-Noy theodore Brown Matthew P. Johnson Deniz Sarioz Dinesh Verma Chai Wah Wu Department of Computer Science Graduate Center of the City University of New York USA IBM Thomas J. Watson Research Center Hawthorne Yorktown Heights NY USA

An ad-hoc sensor network is composed of sensing devices which can measure or detect features of their environment, communicate with one other and possibly with other devices that perform data fusion. One of the problems motivated by ad-hoc sensor networks is to position sensors in order to maximize coverage, or equivalently to minimize the number of sensors required to cover a given area.

关键词： Lattices Robustness Government Distance measurement Gain Ad hoc networks Mobile communication

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Automated sensor-specific power management for wireless sensor networks

Automated sensor-specific power management for wireless sens...

引用

ieee Internatonal conference on Mobile Adhoc and sensor systems (MASS)

作者： Nakyoung Kim Sukwon Choi Hojung Cha Department of Computer Science Yonsei University Seoul South Korea

Power management of sensor nodes is essential to maximize the lifetime of wireless sensor networks. Energy consumption of individual sensor node differs greatly depending on its type. Existing operating systems for sensor networks typically leave the power management of sensors to applications. Unless specific features of the sensors and batteries are considered in the application design, energy consumption may increase or the application may malfunction. In this paper, we define factors to be considered for sensor-specific power management, and then propose an automated sensor-specific power management system. the system is implemented on the multi-threaded RETOS operating system for sensor networks. the experiment results with various applications show that the proposed system reduced the energy consumption by up to 29% without modification of the application code.

关键词： Energy consumption Microwave integrated circuits Monitoring Operating systems Power demand Kernel Wireless sensor networks

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Cost-effective multidimensional publish/subscribe services in sensor networks

Cost-effective multidimensional publish/subscribe services i...

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ieee Internatonal conference on Mobile Adhoc and sensor systems (MASS)

作者： Duc A. Tran Cuong H. Pham Department of Computer Science University of Massachusetts Boston MA USA

Publish/subscribe services are natural applications of sensor networks as sensors are designed mainly to detect and notify upon events of interest. To enable these services, the brokerage mechanism that routes a given event to the subscribing nodes must be confined to the networkpsilas resource constraints. GHT has been used as a cost-effective way to disseminate subscriptions and events to the sensor network. It is, however, efficient only for exact-match subscriptions. We propose an efficient GHT-like technique for both exact-match and range subscriptions where the data space can be of any dimension.

关键词： Subscriptions Protocols Temperature sensors Routing protocols Data models Monitoring three dimensional displays

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An Efficient Policy System for Body sensor Networks

An Efficient Policy System for Body Sensor Networks

引用

international conference on Parallel and distributed systems (ICPADS)

作者： Yanmin Zhu Sye Loong Keoh Morris Sloman Emil Lupu Naranker Dulay Nathaniel Pryce Department of Computing Imperial College London UK

Body sensor networks (BSNs) have become a promising technology for healthcare, in which biosensors continuously monitor physiological parameters of a user. Distinct from conventional sensor networks for environmental monitoring, such networks need to be adaptive and can therefore be easily managed. In addition, security becomes a necessity. To this end, we design a policy system that implements policy-driven management on the sensor level. Biosensor adaptability is realized through support of dynamic loading, enabling and disabling of policies without shutting down nodes. In addition, fine-grained access control becomes possible through authorization policies on biosensors. Design and implementation details of the policy system are presented. Experimental results demonstrate that the policy system is viable and can accelerate application development of biosensor networks for healthcare.

关键词： Body sensor networks Biosensors Medical services Condition monitoring Biomedical monitoring Environmental management sensor systems Access control Authorization Acceleration

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Collision classification-based MAC protocol for ieee 802.11 wireless local area networks

Collision classification-based MAC protocol for IEEE 802.11 ...

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international conference on Broadband Networks (BroadNets)

作者： Qifei Zhang Chao Gui Baolin Sun School of Computing Hubei University of Economics China

Traditional backoff algorithms in distributed contention-based MAC protocols adopt contention window scheme for collision resolution. Collided nodes are redistributed in extended windows to avoid further collision. However, collision may still occur due to intersecting window ranges. In this paper, we propose an effective backoff algorithm featuring collision-free collision classification resolution (CF-CCR) based on collision classification model to resolve different collisions with different manners. Under the schedule of CF-CCR, the network will ultimately converges to a collision free state, in which nodes access channel sequentially with no collision occurred. the simulation results show that CF-CCR outperforms ieee 802.11 DCF in collision times, throughput, delay and fairness.

关键词： Media Access Protocol Wireless application protocol Wireless LAN Access protocols Road accidents Physical layer Transmitters Chaos Sun Computer networks

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Performance Analysis of Group Based Detection for Sparse sensor Networks

Performance Analysis of Group Based Detection for Sparse Sen...

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ieee international conference on distributed computing systems

作者： Jingbin Zhang Gang Zhou Sang H. Son John A. Stankovic Kamin Whitehouse Computer Science Department University of Virginia Charlottesville VA 22903

ISBN: (纸本)9781424431748

In this paper, we analyze the performance of group based detection in sparse sensor networks, when the system level detection decision is made based on the detection reports generated from multiple sensing periods. Sparse deployment is essential for reducing cost of large scale sensor networks, which cover thousands of square miles. In a sparse deployment, the sensor field is only partially covered by sensors' sensing ranges, resulting in void sensing areas in the region, but all nodes are connected through multi-hop networking. Further, due to the unavoidable false alarms generated by a single sensor in a network, many deployed systems use group based detection to reduce system level false alarms. Despite the popularity of group based detection, few analysis works in the literature deal with group based detection. In this paper, we propose a novel approach called Markov chain based Spatial approach (MS-approach) to model group based detection in sensor networks. the M-S-approach successfully overcomes the complicated conditional detection probability of a target in each sensing period, and reduces the execution time of the analysis from many days to 1 minute. the analytical model is validated through extensive simulations. this analytical work is important because it provides an easy way to understand the performance of a system that uses group based detection without running countless simulations or deploying real systems.

关键词： sensor networks based system level execution time sensors False alarms Spread spectrum communication

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EcoDAQ: A Case Study of a Densely distributed Real-Time System for High Data Rate Wireless Data Acquisition

EcoDAQ: A Case Study of a Densely Distributed Real-Time Syst...

引用

ieee international conference on Embedded and Real-Time computing systems and Applications (RTCSA)

作者： Chong-Jing Chen Pai H. Chou Center for Embedded Computer Systems University of California Irvine CA USA Department of Computer Science National Tsing Hua University Hsinchu Taiwan

ISBN: (纸本)9780769533490

Densely distributed wireless real-time system must perform communication scheduling and protocols in addition to task scheduling to achieve schedulability and reliable communication. While many wireless sensor networks are densely distributed, they assume low duty cycling and trivial data packet rates, and they cannot handle many real-world applications. To highlight these design issues, this paper presents a case study with EcoDAQ, a wireless data acquisition system with 50 sensor nodes streaming real-time data over the same frequency channel. To achieve reliable communication, we define a pulling protocol that minimizes node complexity while guaranteeing collision freedom on a given frequency channel. Our case study illustrates the impact of communication requirements on the rest of the systems including bus and processing speeds. Experimental results show that our monitoring station can sustain gathering accelerometer data from up to 50 nodes in one square meter area at up to 15,000 samples per second with minimal latency and show very high expandability, flexibility and reliability.

关键词： Wireless sensor networks Time division multiple access Wireless communication Base stations Protocols throughput Multiaccess communication

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Real-time Detection of Clone Attacks in Wireless sensor Networks

Real-time Detection of Clone Attacks in Wireless Sensor Netw...

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ieee international conference on distributed computing systems

作者： Kai Xing Fang Liu Xiuzhen Cheng David H. C. Du Department of Computer Science The George Washington University Washington DC 20052 USA

ISBN: (纸本)9781424431748

A central problem in sensor network security is that sensors are susceptible to physical capture attacks. Once a sensor is compromised, the adversary can easily launch clone attacks by replicating the compromised node, distributing the clones throughout the network, and starting a variety of insider attacks. Previous works against clone attacks suffer from either a high communication/storage overhead or a poor detection accuracy. In this paper, we propose a novel scheme for detecting clone attacks in sensor networks, which computes for each sensor a social fingerprint by extracting the neighborhood characteristics, and verifies the legitimacy of the originator for each message by checking the enclosed fingerprint. the fingerprint generation is based on the superimposed s-disjunct code, which incurs a very light communication and computation overhead. the fingerprint verification is conducted at both the base station and the neighboring sensors, which ensures a high detection probability. the security and performance analysis indicate that our algorithm can identify clone attacks with a high detection probability at the cost of a low computation/communication/storage overhead. To our best knowledge, our scheme is the first to provide realtime detection of clone attacks in an effective and efficient way.

关键词： Clone Cells real-time detection sensors Wireless sensor networks Fingerprint recognition Fingerprints Legitimacy BASE STATION Optical communication sensor networks

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