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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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Localization of ground targets using a flying sensor network

Localization of ground targets using a flying sensor network

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ieee international conference on sensor Networks, Ubiquitous, and Trustworthy computing

作者： P. DeLima G. York D. Pack Department of Electrical and Computer Engineering United States Air Force Academy Department of Electrical and Computer Engineering United States Air Force Academy USA

In this paper we propose a novel cooperation control method for multiple unmanned aerial vehicles (UAVs) to search, detect, and locate ground targets. We assume that our UAVs are only equipped with rudimentary angle of arrival sensors and the ground targets are mobile radio frequency (RF) emitters. In addition to the mobility, we assume our targets emit signals with random duration and frequency. Our cooperative UAVs function as a reconfigurable sensor network whose goal is to minimize target localization time and the target location error. The proposed control method extends our previous work on distributed control architecture for multiple UAVs by introducing localized hierarchical control structures. Such structures are dynamically established by local leaders that autonomously emerge in response to individual sensor readings, allowing efficient coordination of activities among nearby UAVs. The sensor network uses Kalman filtering techniques to minimize the target location error and the target localization time by combining current and past captured sensor values from multiple UAVs. We validate our proposed control method with simulation results that illustrate its performance under varying levels of cooperation among the members of the sensor network

关键词： Unmanned aerial vehicles distributed control Radio frequency Global Positioning System sensor systems Force sensors Force control Vehicle detection Land mobile radio Kalman filters

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Hops-based Sleep Scheduling Algorithm for Enhancing Lifetime of Wireless sensor Networks

Hops-based Sleep Scheduling Algorithm for Enhancing Lifetime...

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

作者： Yun Wang Demin Wang Weihuang Fu Dharma P. Agrawal OBR Center of Distributed and Mobile Computing Department of Electrical and Computer Engineering and Computer Science University of Cincinnati Cincinnati OH USA

In this paper, we study the node sleep scheduling scheme in the commonly used static disk model for sensor networks, where homogenous sensors are uniformly distributed in a circular area with a stationary sink located at the center. Then, we introduce and analyze a hops-based sleeping scheduling algorithm (HSS) for enhancing the lifetime and energy efficiency of the sensor networks. The HSS divides the circular sensor network into several levels according to the average hop distance based on certain network parameters. By assigning hops-based sleeping probabilities to each sensor, and the network lifetime as well as energy efficiency can be greatly improved. Simulations are performed to compare our proposed HSS scheme with the traditional randomized sleeping scheduling (RSS) scheme, where all the nodes have the uniform sleeping probability. The results demonstrate that our HSS scheme can enhance network lifetime greatly, provide desired QoS requirement effectively, and drastically outperform the RSS scheme

关键词： Sleep Scheduling algorithm Wireless sensor networks sensor phenomena and characterization Spread spectrum communication Energy efficiency Energy consumption Processor scheduling Computer science Telephony

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An Efficient Algorithm for Finding an Almost Connected Dominating Set of Small Size on Wireless Ad Hoc Networks

An Efficient Algorithm for Finding an Almost Connected Domin...

引用

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

作者： Yamin Li Shietung Peng Wanming Chu Department of Computer Science Hosei University Tokyo Japan Department of Computer Hardware University of Aizu Wakamatsu Japan

In this paper, we propose an efficient, distributed and localized algorithm for finding an almost connected dominating set of small size on wireless ad hoc networks. Broadcasting and routing based on a connected dominating set (CDS) is a promising approach. A set is dominating if all the nodes of the network are either in the set or neighbors of nodes in the set. The efficiency of dominating-set-based broadcasting or routing mainly depends on the overhead in constructing the dominating set and the size of the dominating set. Our algorithm can find a CDS faster and the size of the found CDS is smaller than the previous algorithms proposed in the literature. Although our algorithm cannot guarantee the set found is actually a CDS but from our simulation results, the probabilities that the found set is a CDS are higher than 99.96% in all cases

关键词： Mobile ad hoc networks Ad hoc networks Routing protocols Wireless networks Computer networks Radio propagation Spread spectrum communication Radio broadcasting Computer science distributed computing

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Modeling and Analysis of Generalized Slotted-Aloha MAC Protocols in Cooperative, Competitive and Adversarial Environments

Modeling and Analysis of Generalized Slotted-Aloha MAC Proto...

引用

international conference on distributed computing systems

作者： R.T.B. Ma V. Misra D. Rubenstein Columbia University USA

Aloha [1] and its slotted variant [2] are commonly deployed Medium Access Control (MAC) protocols in environments where multiple transmitting devices compete for a medium, yet may have difficulty sensing each other’s presence. This paper models and evaluates the throughput that can be achieved in a system where nodes compete for bandwidth using a generalized version of slotted- Aloha protocols. We evaluate the channel utilization and fairness of these types of protocols for a variety of node objectives, including maximizing aggregate throughput of the channel, each node greedily maximizing its own throughput, and attacker nodes that attempt to jam the channel. If all nodes are selfish and greedily attempt to maximize their own throughputs, a situation similar to the traditional Prisoner’s Dilemma[3] arises. Our results reveal that under heavy loads, greedy strategies reduce the utilization, and that attackers cannot do much better than attacking during randomly selected slots.

关键词： Media Access Protocol Throughput Access protocols Aggregates Bandwidth Wireless sensor networks Ad hoc networks Costs Communication networks Multiaccess communication

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Breaking up is hard to do - Dispersion: from design to implementation

Breaking up is hard to do - Dispersion: from design to imple...

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ieee international conference on Robotics and Automation (ICRA)

作者： M. Isaacs M. Anderson S. Ashworth J. Blackburn-Lynch B. Bynum J. Pearce C. Pemberton Department of Mathematics and Computer Science Berea College Mobile Robotics and Parallel Processing Laboratory Berea KY USA Center for Distributed Robotics University of Minnesota Minneapolis MN USA

This article assesses the performance of a virtual pheromone-based sectored dispersion algorithm which is implemented on a low-cost miniature mobile robotic platform using sonar sensing. The approach is a distributed one and the robotic platform and sensor array are sufficiently inexpensive that they can be employed in undergraduate research and/or for coursework in a small college environment

关键词： Educational robots Robot sensing systems Mobile robots sensor arrays Service robots Parallel robots Hardware Mobile computing Educational institutions Dispersion

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Placement and distributed deployment of sensor teams for triangulation based localization

Placement and distributed deployment of sensor teams for tri...

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ieee international conference on Robotics and Automation (ICRA)

作者： V. Isler Department of Computer Science Rensselaer Polytechnic Institute Troy NY USA

We address the problem of placing a sensor network so as to minimize the uncertainty in estimating the position of targets. The novelty of our formulation is in the sensing model: we focus on stereo sensors where the measurements from two sensors must be combined for an estimation. We study two versions of this problem. In the first version, which we call the placement problem, we are given a workspace and an error threshold. The objective is to place a minimum number of cameras so that no matter where the target is located in the workspace, the uncertainty in localizing it is less than the threshold. For this problem, we present an approximation algorithm and prove that the deviation of its performance from the optimal value is bounded by a constant. In the second version, called the deployment problem, we study the problem of relocating a mobile sensor team to minimize the uncertainty in localizing possibly moving targets. We present a distributed, discrete-time algorithm which explicit addresses communication and motion constraints and show how to compute the optimal move within the time-step for a given target/sensor-pair assignment. The utility of the algorithm is demonstrated with simulations

关键词： Cameras Robot sensing systems Robot vision systems Robotics and automation Approximation algorithms Uncertainty Mobile communication distributed computing Mobile robots Computer science

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W-Grid: a Cross-Layer Infrastructure for Multi-Dimensional Indexing, Querying and Routing in Wireless Ad-Hoc and sensor Networks

W-Grid: a Cross-Layer Infrastructure for Multi-Dimensional I...

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international conference on Peer-to-Peer computing

作者： G. Moro G. Monti Department of Electronic Computer Science and Systems University of Bologna Cesena Italy

Large scale wireless ad-hoc networks of computers, sensors, PDAs etc. (i.e. nodes) are revolutionizing connectivity and leading to a paradigm shift from centralized systems to highly distributed and dynamic environments. A plethora of routing algorithms have been proposed for the network path discovery ranging from broadcasting/flooding-based approaches to those using Global Positioning systems (GPS). In this paper we propose a novel decentralized infrastructure that self-organizes wireless devices in an ad-hoc network, where each node has one or more virtual coordinates through which both message routing and data management occur without reliance on either flooding/broadcasting operations or GPS. The resulting ad-hoc network does not suffer from the dead-end problem, which happens in geographic-based routing when a node is unable to locate a neighbor closer to the destination than itself. The multi-dimensional data management capability will be described showing, as an example, how the location service reduces to a simple query, like for any other data type. Extensive performance analysis and experiments have been conducted and the results compared to GPSR, which is considered the most efficient routing solution not using broadcast operations. Our approach shows significant performance gains

关键词： Wireless sensor networks Indexing Routing Ad hoc networks Broadcasting Global Positioning System Personal digital assistants Large-scale systems Computer networks distributed computing

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Random Multiresolution Representations for Arbitrary sensor Network Graphs

Random Multiresolution Representations for Arbitrary Sensor ...

引用

international conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Wei Wang K. Ramchandran Department of Electrical Engineering and Computer Sciences University of California Berkeley USA

We propose a distributed multiresolution representation of sensor network data so that large-scale summaries are readily available by querying a small fraction of sensor nodes, anywhere in the network, and small-scale details are available by querying a larger number of sensors, locally in the region of interest. A global querier (such as a mobile collector or unmanned aerial vehicle) can obtain a lossy to lossless representation of the network data, according to the desired resolution. A local querier (such as a sensor node) can also obtain either large-scale trends or local details, by querying its immediate neighborhood. We want the encoding to be robust to arbitrary, even time-varying, wireless communication connectivity graphs. Thus we want to avoid cluster heads or deterministic hierarchies that are not robust to single points of failure. We propose a randomized encoding which enables both robustness, and distributed computation that does not require long distance coordination or awareness of network connectivity at individual sensors. Our distributed encoding algorithm operates on local neighborhoods of the communication graph

关键词： Robustness Signal resolution Signal processing algorithms Computer networks Encoding Spatial resolution Large-scale systems distributed computing Wireless communication Clustering algorithms

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SeLoc: Secure Localization for Wireless sensor and Actor Network

SeLoc: Secure Localization for Wireless Sensor and Actor Net...

引用

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

作者： Jianqing Ma Shiyong Zhang Yiping Zhong Xiaowen Tong Department of Computing and Information Technology Fudan University Shanghai China School of Software Shanghai JiaoTong University Shanghai China

The need for efficient and secure localization is an important issue in a scalable self-organizing network. However, exiting secure solutions are not well suitable or effective for wireless sensor and actor networks (WSANs) because of the features of WSANs (e.g. node heterogeneity). In this paper, we propose a novel approach (SeLoc) to secure localization for WSAN based on DV-Hop and hidden actors. After passively receiving authentication messages and minimum hop numbers from sensor nodes, these nearby actors distributively compute these sensors' location by actor-actor coordination and maximum likelihood estimators (MLE). By filtering inaccurate/false localization information, the SeLoc localization scheme can prevent these location attacks and improve the accuracy of localization. In addition, we also propose the voting-based location verification scheme in this paper. This verification scheme cannot only effectively decrease the success probability of attack, but also tolerate attacks to some extend. The analysis shows that SeLoc scheme is robust against location attacks and against other attacks like wormhole attacks, Sybile attacks. Also, comparing with other infrastructure-centric localization schemes, SeLoc scheme is energy saving, economical and secure for WSAN by fully using the features of WSAN

关键词： Wireless sensor networks Communication system security Maximum likelihood estimation Self-organizing networks sensor phenomena and characterization Authentication distributed computing Information filtering Information filters Robustness

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Achieving Load Balancing in Wireless Mesh Networks Through Multiple Gateways

Achieving Load Balancing in Wireless Mesh Networks Through M...

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

作者： Deepti Nandiraju Lakshmi Santhanam Nagesh Nandiraju Dharma P. Agrawal Center for Distributed and Mobile Computing Department of ECECS University of Cincinnati Cincinnati OH USA

Wireless mesh networks (WMNs) are evolving to be the key technology of the future. As the WMNs are envisioned to provide high bandwidth broadband service to a large community of users, the Internet gateway (IGW) which acts as a central point of Internet attachment for the mesh routers, it is likely to be a potential bottleneck because of its limited wireless link capacity. We propose a novel technique that elegantly balances the load among the different IGWs in a WMN. We switch the point of attachment of an active source serviced gateway depending on the average queue length at the IGW. The proposed load balancing scheme includes: an initial gateway discovery module, which determines a primary gateway for a mesh router and a load balancing module that rebalances the load among the gateways. We use ns-2 for evaluating our proposed scheme and we observe that the proposed scheme is able to balance the traffic efficiently

关键词： Load management Wireless mesh networks Web and internet services Switches Traffic control Telecommunication traffic Mobile ad hoc networks IP networks Protocols Mobile computing

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