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

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Content-Based Publish-Subscribe over Structured Overlay Networks

Content-Based Publish-Subscribe over Structured Overlay Netw...

引用

international conference on distributed computing systems

作者： R. Baldoni C. Marchetti A. Virgillito R. Vitenberg Dipartimento di Informatica e Sistemistica Università di Roma La Sapienza Italy IBM Research Haifa Israel

This paper introduces a novel architecture for implementing content-based pub/sub communications on top of structured overlay networks. This architecture overcomes some well-known limitations of existing infrastructures, i.e. lack of self-configuration and of adaptiveness to dynamic changes. This is achieved by devising a mediator stratum between the rich event subscription semantics of content-based pub/sub systems and the standard logical addressing scheme of overlays. The paper describes details of the design and provides considerations in selecting the subscription-to-node and event-to-node mappings suitable for the solution. We identify the lack of native support for one-to-many communication by overlay networks as the main impediment for efficient system operation. The paper introduces a novel primitive for one-to-many message delivery, showing through simulation how this can improve performance of the architecture. The simulation study also shows performance comparison between the different mappings proposed as well as evaluation of other optimizations discussed in the paper

关键词： Publish-subscribe Subscriptions Routing Unicast Scalability Impedance sensor phenomena and characterization sensor systems and applications Computer architecture Content management

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An ECA Rules Based Middleware Architecture for Wireless sensor Networks

An ECA Rules Based Middleware Architecture for Wireless Sens...

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ieee international conference on Parallel and distributed computing, Applications and Technologies (PDCAT)

作者： Chongqing Zhang Minglu Li Qunhua Pan Department of Computer Science and Engineering Shanghai Jiaotong University Shanghai China

Wireless sensor networks will be used in a variety of adaptive applications. Appropriate middleware is needed to support the development of adaptive WSNs applications. In this paper, we introduce a middleware architecture that facilitates the development of adaptive WSNs applications. The whole architecture is event-driven and a kind of adapted ECA rules model lies at the core of the architecture. We discuss the structure of this kind of adapted ECA rules and how to implement the ECA rules in the architecture. The programming model that centers on constructing ECA rules is also discussed.

关键词： Middleware Wireless sensor networks Computer architecture Application software Temperature sensors Databases Computer science Wireless communication Communications technology Microelectromechanical systems

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Adaptive Carrier Sensing and Packet Sending - An Alternative to Boost the Performance in Directional Communications

Adaptive Carrier Sensing and Packet Sending - An Alternative...

引用

ieee international conference on Parallel and distributed computing, Applications and Technologies (PDCAT)

作者： J.L. Bordim T. Hunziker K. Nakano Department of Computer Science University of Brasilia Brasilia Brazil Department of Wireless Communication Systems ATR Kansai Science Kyoto Japan Department of Artificial Complex Systems Engineering School of Engineering Hiroshima University Higashi Hiroshima Japan

Despite the efforts to leverage the network performance through the use of Directional Communications, most protocols still rely on the basic mechanisms employed by the ieee802.11 standards. While this might be desirable to facilitate compatibility, nodes empowered with directional antennas should be able to explore the benefits of directional communications whenever possible. With that in mind, we propose two mechanisms, termed Adaptive Carrier Sensing and Adaptive Packet Sending, aiming to allow nodes equipped with directional antennas to exploit the advantages of such systems to improve network performance.

关键词： Directional antennas Ad hoc networks Throughput Media Access Protocol Computer science Wireless communication Cities and towns systems engineering and theory Wireless sensor networks Relays

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Implementation and evaluation of the personal wellness coach

Implementation and evaluation of the personal wellness coach

引用

international conference on distributed computing systems Workshop

作者： R. Asselin G. Ortiz J. Pui A. Smailagic C. Kissling Carnegie Mellon University USA Technische Universität München Germany

This paper describes the design and evaluation of a wearable personal wellness coach system that supports a range of activities including health data collection, interpretation, feedback and self-monitoring. We implemented a wearable computing platform consisting of an array of sensors and application software to motivate users to reach fitness goals and prevent harm in a real-time environment. Evaluation and testing were done on 65 users in four groups: students, health club members, ROTC members and baby boomer-age individuals. Comparing the personal wellness coach against an existing exercise product, our results indicate that this system is an effective tool that is less intrusive and in some cases can perform like a personal trainer and help improve user efficiency.

关键词： Heart rate Biomedical monitoring sensor arrays Wearable computers Testing Shape Real time systems State feedback Heart rate detection Computer architecture

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Detecting Malicious Beacon Nodes for Secure Location Discovery in Wireless sensor Networks

Detecting Malicious Beacon Nodes for Secure Location Discove...

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international conference on distributed computing systems

作者： Donggang Liu Peng Ning Wenliang Du North Carolina State University USA Syracuse University USA

sensors' locations play a critical role in many sensor network applications. A number of techniques have been proposed recently to discover the locations of regular sensors based on a few special nodes called beacon nodes, which are assumed to know their locations (e.g., through GPS receivers or manual configuration). However, none of these techniques can work properly when there are malicious attacks, especially when some of the beacon nodes are compromised. This paper introduces a suite of techniques to detect and remove compromised beacon nodes that supply misleading location information to the regular sensors, aiming at providing secure location discovery services in wireless sensor networks. These techniques start with a simple but effective method to detect malicious beacon signals. To identify malicious beacon nodes and avoid false detection, this paper also presents several techniques to detect replayed beacon signals. This paper then proposes a method to reason about the suspiciousness of each beacon node at the base station based on the detection results collected from beacon nodes, and then revoke malicious beacon nodes accordingly. Finally, this paper provides detailed analysis and simulation to evaluate the proposed techniques. The results show that our techniques are practical and effective in detecting malicious beacon nodes

关键词： Intelligent networks Wireless sensor networks Global Positioning System Protocols Signal detection Target tracking Routing Manuals Signal processing Base stations

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SHARP: a new approach to relative localization in wireless sensor networks

SHARP: a new approach to relative localization in wireless s...

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international conference on distributed computing systems Workshop

作者： A.A. Ahmed H. Shi Y. Shang Department of Computer Science University of Missouri Columbia Columbia MO USA

For wireless sensor networks, localization is crucial due to the dynamic nature of deployment. In relative localization, nodes use the distance measurements to estimate their positions relative to some coordinate system. In absolute localization, a few nodes (called anchors) need to know their absolute positions, and all the other nodes are absolutely localized in the coordinate system of the anchors. Relative and absolute localization methods differ in both the performance and the cost. We present a new approach to relative localization that we refer to as: simple hybrid absolute-relative positioning (SHARP). In SHARP, a relative localization method (M1) is used to relatively localize N/sub r/ reference nodes. Then, an absolute localization method (M2) uses these N/sub r/ nodes as anchors to localize the rest of the nodes. Choosing N/sub r/, M1, and M2 gives a wide range of performance-cost tuning. We have done extensive simulation using the multidimensional scaling (MDS) method as M1 and the ad-hoc positioning system (APS) method as M2. While previous research shows that MDS gives better localization results than APS, our simulation shows that SHARP outperforms MDS if both the localization error and the cost are considered.

关键词： Intelligent networks Wireless sensor networks Costs sensor phenomena and characterization Distance measurement Multidimensional systems Computer science Instruments Micromechanical devices Microelectromechanical systems

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Geographical cluster based routing in sensing-covered networks

Geographical cluster based routing in sensing-covered networ...

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international conference on distributed computing systems Workshop

作者： H. Frey D. Gorgen System Software and Distributed Systems University of Trier Germany

The relationship between coverage and connectivity in sensor networks has been investigated in recent research treating both network parameters in a unified framework. It is known that networks covering a convex area are connected if the communication range of each node is at least twice a unique sensing range used by each node. Furthermore, geographic greedy routing is a viable and effective approach providing guaranteed delivery for this special network class. In this work we show that the result about network connectivity does not suffer from generalizing the concept of sensing coverage to arbitrary network deployment regions. However, dropping the assumption that the monitored area is convex requires the application of greedy recovery strategies like traversing a locally extracted planar subgraph. A recently proposed variant performs message forwarding along edges of a virtual overlay graph instead of using wireless links for planar graph construction directly. However, there exist connected network configurations where this routing variant may fail. In this work we proof a theoretical bound which is a sufficient condition for guaranteed delivery of this routing strategy applied in sensing covered networks. By simulation results we show that this bound may also be relaxed from a practical point of view and that geographical cluster based routing achieves a comparable performance compared to other planar graph routing variants based on two-hop neighbor information.

关键词： Routing Intelligent networks Wireless sensor networks Ad hoc networks Wireless communication Monitoring Euclidean distance System software sensor systems Sufficient conditions

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Enhancing Source-Location Privacy in sensor Network Routing

Enhancing Source-Location Privacy in Sensor Network Routing

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international conference on distributed computing systems

作者： P. Kamat Yanyong Zhang W. Trappe C. Ozturk Wireless Information Network Laboratory (WINLAB) Rutgers University Piscataway NJ USA

One of the most notable challenges threatening the successful deployment of sensor systems is privacy. Although many privacy-related issues can be addressed by security mechanisms, one sensor network privacy issue that cannot be adequately addressed by network security is source-location privacy. Adversaries may use RF localization techniques to perform hop-by-hop traceback to the source sensor's location. This paper provides a formal model for the source-location privacy problem in sensor networks and examines the privacy characteristics of different sensor routing protocols. We examine two popular classes of routing protocols: the class of flooding protocols, and the class of routing protocols involving only a single path from the source to the sink. While investigating the privacy performance of routing protocols, we considered the tradeoffs between location-privacy and energy consumption. We found that most of the current protocols cannot provide efficient source-location privacy while maintaining desirable system performance. In order to provide efficient and private sensor communications, we devised new techniques to enhance source-location privacy that augment these routing protocols. One of our strategies, a technique we have called phantom routing, has proven flexible and capable of protecting the source's location, while not incurring a noticeable increase in energy overhead. Further, we examined the effect of source mobility on location privacy. We showed that, even with the natural privacy amplification resulting from source mobility, our phantom routing techniques yield improved source-location privacy relative to other routing methods

关键词： Privacy Routing protocols sensor phenomena and characterization Imaging phantoms sensor systems Radio frequency Floods Energy consumption System performance Protection

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Efficient Power Management Based on Application Timing Semantics for Wireless sensor Networks

Efficient Power Management Based on Application Timing Seman...

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international conference on distributed computing systems

作者： O. Chipara Chenyang Lu G.-C. Roman Department of Computer Science and Engineering Washington University of Saint Louis USA

This paper proposes Efficient Sleep Scheduling based on Application Timing (ESSAT), a novel power management scheme that aggressively exploits the timing semantics of wireless sensor network applications. We present three ESSAT protocols each of which integrates (1) a lightweight traffic shaper that actively shapes the workload inside the network to achieve predictable timing properties over multiple hops, and (2) a local scheduling algorithm that wakes up nodes just-in-time based on the timing properties of shaped workloads. Our ESSAT protocols have several distinguishing features. First, they can save significant energy with minimal delay penalties. Second, they do not maintain TDMA schedules or communication backbones; as such, they are highly efficient and suitable for resource constrained sensor platforms. Moreover, the protocols are robust in highly dynamic network environments, i.e., they can handle variable multi-hop communication delays and aggregate workloads involving multiple queries, and can adapt to varying workload and network topologies. Our simulations showed that DTS-SS, an ESSAT protocol, achieved an average node duty cycle 38-87% lower than SPAN, and query latencies 36-98% lower than PSM and SYNC

关键词： Energy management Timing Wireless sensor networks Protocols Delay Sleep Telecommunication traffic Shape Scheduling algorithm Time division multiple access

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A self configurable topology-aware network for smart materials

A self configurable topology-aware network for smart materia...

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international conference on distributed computing systems Workshop

作者： T. Yanagihara H. Sakakibara R. Ohsawa M. Ideuchi N. Kohtake I. Masayuki K. Takashio H. Tokuda Keio Research Institute Keio University Fujisawa Kanagawa Japan Faculty of Environmental Information Keio University Fujisawa Kanagawa Japan Graduate School of Media and Governance Keio University Fujisawa Kanagawa Japan

In this paper, we present an architecture to create extemporaneous networking on u-Texture. u-Texture is a tile shaped smart material which can be used to construct smart furnitures. Each u-Texture reacts according to what the entire smart furniture is shaped like. This reaction greatly affects the networking within a u-Texture. We therefore must allow dynamic arrangements within the network when a u-Texture is detached from or attached to another smart furniture. We present our tactics to implement such an self configurable topology-aware network to support applications executed on the entire smart furniture.

关键词： Infrared sensors Wireless sensor networks Tactile sensors Computer displays Acceleration Tiles Application software Intelligent sensors Wireless communication Embedded computing

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