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检索条件"任意字段=3rd IEEE International Conference on Distributed Computing in Sensor Systems, DCOSS 2007"

共 175 条记录，以下是11-20 订阅

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Passive inspection of sensor networks

引用

3rd ieee international conference on distributed computing in sensor systems

作者： Ringwald, Matthias Roemer, Kay Vitaletti, Andrea ETH Inst Pervas Comp Zurich Switzerland Univ Rome Dept Informat Rome Italy

ISBN: (纸本)9783540730897

Deployment of sensor networks in real-world settings is a labor-inten-sive and cumbersome task: environmental influences often trigger problems that are difficult to track down due to limited visibility of the network state. In this paper we present a framework for passive inspection (i.e., no instrumentation of sensor nodes required) of deployed sensor networks and show how this framework can be used to inspect data gathering applications. The basic approach is to temporarily install a distributed network sniffer alongside the inspected sensor network, with overheard messages being analyzed by a data stream processor and network state being displayed in a graphical user interface. Our tool can be flexibly applied to different sensor network operating systems and protocol stacks, and can deal well with incomplete information.

关键词： Inspection

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Efficient and distributed access control for sensor networks

引用

3rd ieee international conference on distributed computing in sensor systems

作者： Liu, Donggang Univ Texas Sec Lab CSE Dept Arlington TX 76019 USA

ISBN: (纸本)9783540730897

sensor networks are often used to sense the physical world and provide observations for various uses. In hostile environments, it is critical to control the network access to ensure the integrity, availability, and at times confidentiality of the sensor data. This paper develops efficient methods for distributed access control in sensor networks. The paper starts with a baseline approach, which provides a more flexible and efficient way to enforce access control when compared with previous solutions. This paper then extends the baseline approach to enable privilege delegation, which allows a user to delegate its privilege to other users without using a trusted server, and broadcast query, which allows a user to access the network at a large scale efficiently. The privilege delegation and broadcast query are very useful in practice;none of the current solutions can achieve these two properties.

关键词： sensor networks

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Neighbor Collaboration Detection in Wireless sensor Networks

Neighbor Collaboration Detection in Wireless Sensor Networks

引用

3rd international conference on Wireless Communications, Networking and Mobile computing (WiCOM 2007)

作者： Tang Linjun Wang Hanxing Shanghai Univ Coll Sci Shanghai 200436 Peoples R China

ISBN: (纸本)9781424413119

In this paper, we explore two important issues for distributed target detection in wireless sensor network (WSN): (1) How to increase efficient-energy for each sensor;(2) How to improve the detection precision about whether a target is occurring in the event region. We present a neighbor collaboration detection (NCD) scheme that introduces a clustered fusion into target detection process. Based on MAP decision criterion, we propose an optimal fusion decision. We mathematically show that the NCD Scheme vastly improves the target detection precision, when the number of neighbor sensor is large.

关键词： distributed target detection cluster fusion NCD WSN

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A Deterministic distributed TDMA Scheduling Algorithm for Wireless sensor Networks

A Deterministic Distributed TDMA Scheduling Algorithm for Wi...

引用

3rd international conference on Wireless Communications, Networking and Mobile computing (WiCOM 2007)

作者： Wang, Yu Henning, Ian Univ Essex Dept Elect Syst Engn Colchester CO4 3SQ Essex England

ISBN: (纸本)9781424413119

Efficient scheduling of time slots in a time division multiple access scheme (TDMA) is important for low power wireless sensor networks. Existing algorithms are either centralized with poor scalability, or distributed but with high complexity. In this paper, we explain how TDMA could be more energy efficient by careful slot scheduling in wireless sensor networks. Then we propose a deterministic distributed TDMA scheduling algorithm (DD-TDMA). In DD-TDMA, each sensor node schedules its own TDMA slot based on its neighborhood information, and packet collisions are gracefully avoided during scheduling. The experimental results show that compared to other centralized and distributed scheduling algorithms, DD-TDMA achieves better performance in terms of schedule length, running time and message complexity.

关键词： Wireless sensor networks Time division multiple access Scheduling

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A distributed Energy Balance Clustering Protocol for Heterogeneous Wireless sensor Networks

A Distributed Energy Balance Clustering Protocol for Heterog...

引用

3rd international conference on Wireless Communications, Networking and Mobile computing (WiCOM 2007)

作者： Duan, Changmin Fan, Hong Hubei Inst Nationalities Dept Comp Sci Enshi 445000 Hubei Peoples R China Huazhong Univ Sci & Technol Coll Comp Wuhan 430074 Peoples R China

ISBN: (纸本)9781424413119

sensor networks have a wide range of potential, practical and useful applications. However, there are issues that need to be addressed for efficient operation of sensor network systems in real applications. To extend the lifetime of a sensor network, clustering algorithm is a kind of key technique used to reduce energy consumption, which can increase network scalability and lifetime. In this paper, we proposed a distributed Energy Balance Clustering (DEBC) protocol for heterogeneous network. Cluster heads are selected by a probability depending on the ratio between remaining energy of node and the average energy of network. The high initial and remaining energy nodes have more chances to be the cluster heads than the low energy nodes. Simulation result shows that our protocol provides longer lifetime than the existing clustering protocol and uses the best of energy in heterogeneous network.

关键词： Energy balance Clustering Wireless sensor network Heterogeneous network

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Mobile anchor-free localization for wireless sensor networks

引用

3rd ieee international conference on distributed computing in sensor systems, dcoss 2007

作者： Xu, Yurong Ouyang, Yi Le, Zhengyi Ford, James Makedon, Fillia DevLab. Computer Science Department Dartmouth College Heracleia Lab. Univ. of Texas Arlington United States

ISBN: (纸本)3540730893

In this paper, we consider how to localize individual nodes in a wireless sensor network when some subset of the network nodes can be in motion at any given time. For situations in which it is not practical or cost-efficient to use GPS or anchor nodes, this paper proposes an Anchor-Free Mobile Geographic distributed Localization (MGDL) algorithm for wireless sensor networks. Taking advantage of the accelerometers that are present in standard motes, MGDL estimates the distance moved by each node. If this distance is beyond a threshold, then this node will trigger a series of mobile localization procedures to recalculate and update its location in the node itself. Such procedures will be stopped when the node stops moving. Data collected using Tmote Invent nodes (Moteiv Inc.) and simulations show that the proposed detection method can efficiently detect the movement, and that the localization is accurate and the communication is efficient in different static and mobile contexts. © Springer-Verlag Berlin Heidelberg 2007.

关键词： sensor nodes

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Lifetime Maximization in Wireless sensor Networks with Network Coding

Lifetime Maximization in Wireless Sensor Networks with Netwo...

引用

3rd international conference on Wireless Communications, Networking and Mobile computing (WiCOM 2007)

作者： Hong, Yongfa Xu, Juan Jiang, Changjun Tongji Univ Coll Elect & Informat Engn Shanghai 200092 Peoples R China Shandong Univ Sci & Technol Coll Informat Sci & Technol Qingdao Peoples R China

ISBN: (纸本)9781424413119

The lifetime is a critical parameter for wireless sensor networks, which is defined as the maximum time of delivering certain data to the sink node before sensor node runs out of energy under an initial energy is given. In this paper, we propose a distributed algorithm for data gathering in wireless sensor networks with the assistance of network coding, such that the network lifetime is maximized. We prove rigorously that the proposed algorithm converge to the optimal solution of regularized problem.

关键词： network lifetime wireless sensor networks subgradient algorithm distributed algorithm network coding

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Research on Mechanism of Mobile Agent for Wireless sensor Networks

Research on Mechanism of Mobile Agent for Wireless Sensor Ne...

引用

3rd international conference on Wireless Communications, Networking and Mobile computing (WiCOM 2007)

作者： Wang Jietai Xu Jiadong Yang Shaojun Northwestern Polytech Univ Sch Elect & Informat Xian 710072 Peoples R China

ISBN: (纸本)9781424413119

computing model of nodes has an important effect on the network performance and the mobile agent computing model for the next generation network has attracted more and more attentions. The background of mobile agent applied In the wireless sensor network is first analyzed. Then a framework based on mobile agent is proposed from two levels, namely network and nodes. After introducing the basic elements, functional definitions and interfaces of the framework, an implementation mechanism based on directed diffusion for mobile agent is presented in detail.

关键词： Wireless sensor Networks distributed computing Model Mobile Agent

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Adaptive distributed Randomized TDMA Scheduling For Clustered Wireless sensor Networks

Adaptive Distributed Randomized TDMA Scheduling For Clustere...

引用

3rd international conference on Wireless Communications, Networking and Mobile computing (WiCOM 2007)

作者： Li, Shihan Qian, Depei Liu, Yi Tong, Jie Beihang Univ Sino German Joint Software Inst Beijing 100083 Peoples R China

ISBN: (纸本)9781424413119

This paper presents an adaptive distributed TDMA slot assignment algorithm, called A-DRAND, which is an improved version of DRAND in clustered wireless sensor networks where cluster heads need more slots and will be alternated afterwards by other cluster members for energy balance reason. It utilizes cluster info to allocate slots discriminately for different kind of sensor node and adapts its operation depending on the requirements of the application. The overhead is reduced significantly by reserving a special slot number range for slot reassignment. Simulation results show that running time and transmission cost of slot reassignment is only at most 1/m of that of all-participating assignment, where m is the proportion of cluster heads and other sensors with changing slots demanding in the network

关键词： Wireless sensor Networks CSMA TDMA

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Energy-efficient data acquisition using a distributed and self-organizing scheduling algorithm for wireless sensor networks

引用

3rd ieee international conference on distributed computing in sensor systems

作者： Chatterjea, Supriyo Nieberg, Tim Zhang, Yang Havinga, Paul Univ Twente Dept Comp Sci POB 217 NL-7500 AE Enschede Netherlands Univ Bonn Res Inst Discrete Math Bonn 53113 Germany

ISBN: (纸本)9783540730897

Wireless sensor networks are often densely deployed for environmental monitoring applications. Collecting raw data from these networks can lead to excessive energy consumption. Thus using the spatial and temporal correlations that exist between adjacent nodes we appoint a few as representative nodes that perform in-network aggregation. This reduces the total number of transmissions. Our distributed scheduling algorithm autonomously assigns a particular node to perform aggregation and reassigns schedules when network topology changes. These topology changes are detected using cross-layer information from the underlying MAC layer. We also present theoretical performance estimates and upper bounds of our algorithm and evaluate it by implementing the algorithm on actual sensor nodes, demonstrating an energy-saving of up to 80% compared to raw data collection.

关键词： Scheduling algorithms

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