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Medians and Beyond: New Aggregation Techniques for Sensor ...

H.2.4 [Systems]: Distributed databases, Query processing General Terms Algorithms, Performance Keywords Sensor Networks, Aggregation, Approximation Algorithms, Dis-tributed Algorithms ∗The authors were supported by NSF grant IIS-0121562 and Army Research Organisation grant DAAD19-03-D-0004 through the In-stitute for Collaborative Biotechnologies.

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Interplay of processing and routing in aggregate query ...

Interplay of processing and routing in aggregate query optimization for sensor networks Niki Trigoni Alexandre Guitton Antonios Skordylis Computing Laboratory, University of Oxford, Oxford OX1 3QD, UK

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Figure 7 from Processing approximate aggregate queries in ...

Processing approximate aggregate queries in wireless sensor networks @article{Deligiannakis2006ProcessingAA, title={Processing approximate aggregate queries in wireless sensor networks}, author={Antonios Deligiannakis and Yannis Kotidis and Nick Roussopoulos}, journal={Inf. Syst.}, year={2006}, volume={31}, pages={770-792} }

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Efficient Iceberg Query Processing in Sensor Networks ...

The iceberg query finds data whose aggregate values exceed a pre-specified threshold. To process an iceberg query in sensor networks, all sensor data We use cookies to enhance your experience on our website.By continuing to use our website, you are agreeing to our use of cookies.

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Processing Approximate Aggregate Queries in Wireless ...

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): In-network data aggregation has been recently proposed as an e#ective means to reduce the number of messages exchanged in wireless sensor networks. Nodes of the network form an aggregation tree, in which parent nodes aggregate the values received from their children and propagate the result to their own parents.

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Interplay of Processing and Routing in Aggregate Query ...

Interplay of Processing and Routing in Aggregate Query Optimization for Sensor Networks

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A Distributed Spatial Index for Time-Efficient Aggregation ...

Abstract. Many applications using sensing data require the fast retrieval of aggregated information in sensor networks. In this paper, distributed spatial index structure in sensor networks for time-efficient aggregation query processing is proposed.

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Interplay of Processing and Routing in Aggregate Query ...

This paper presents a novel approach to processing continuous aggregate queries in sensor networks, which lifts the assumption of tree-based routing. Given a query workload and a special-purpose gateway node where results are expected, the query optimizer exploits query correlations in order to generate an energy-efficient distributed ...

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Optimized Query Processing for Wireless Sensor Networks

sensor networks is similar to saving and query processing in conventional database. Although infrastructure property and data properties of sensor networks is different with a central database system complementally [1]. We use declarative query in interaction networking. Declarative query playas an interface role. User able

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Research Article AggregateQueriesinWirelessSensorNetworks

of aggregate query processing in wireless sensor networks, this paper proposes Bucket-based Parallel Aggregation (BPA). BPA divides a query region into several cells according to the distribution of sensor nodes and builds a quadtree, and then processes aggregate queries in parallel for each cell region according to routing.

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Processing Multiple Aggregation Queries in Geo-Sensor Networks

To process aggregation queries issued through different sensors as access points in sensor networks, existing algorithms handle queries independently and perform in-network aggregation only at the query time. As a result of ad-hoc and independent execution of queries, no partial result is sharable and reusable among the queries. Consequently, scarce sensor network resources can be easily ...

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Aggregate Queries in Wireless Sensor Networks | Directory ...

However, these aggregate query processing techniques have problems such as high energy consumption in sensor nodes, low accuracy of query processing results, and long query processing time. In order to solve these problems and to enhance the efficiency of aggregate query processing in wireless sensor networks, this paper proposes Bucket-based ...

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TinyCasper: A Privacy-Preserving Aggregate Location ...

niques designed for wireless sensor networks. On the other side, the aggregate query processing module is embedded in-side the server to support aggregate query processing over anonymized locations. TinyCasper system administrators can change the privacy requirement, i.e., k-anonymity re-quirement, at anytime. Finally, system users can issue snap-

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CiteSeerX — Routing and Processing Multiple Aggregate ...

This paper presents a query-driven approach to routing and processing continuous aggregate queries in sensor networks. Given a query workload and a special-purpose gateway node where results are expected, the query optimizer exploits query correlations in order to generate an energyefficient distributed evaluation plan.

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aggregate query processing in sensor networks

Processing approximate aggregate queries in wireless, Abstract In-network data aggregation has been recently proposed as an eective,means to reduce the number of messages exchanged in wireless sensor networks Nodes of .

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REQUEST: Region-Based Query Processing in Sensor Networks ...

Only a few approaches proposed the processing of grouped aggregate queries. However, since groups in their approaches are disjoint, some relevant regions to the query can be missing. In this paper, we propose REQUEST, region-based query processing in sensor networks.

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Medians and Beyond: New Aggregation Techniques for Sensor ...

H.2.4 [Systems]: Distributed databases, Query processing General Terms Algorithms, Performance Keywords Sensor Networks, Aggregation, Approximation Algorithms, Dis-tributed Algorithms ∗The authors were supported by NSF grant IIS-0121562 and Army Research Organisation grant DAAD19-03-D-0004 through the In-stitute for Collaborative Biotechnologies.

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A Privacy-Preserving Location Monitoring System for ...

Index TermsŠLocation privacy, wireless sensor networks, location monitoring system, aggregate query processing, spatial histogram F 1 INTRODUCTION The advance in wireless sensor technologies has resulted in many new applications for military and/or civilian purposes. Many cases of …

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Wireless Network with Privacy Protection and Location ...

Index Terms Location privacy, wireless sensor networks, -location monitoring system, aggregate query processing. I. INTRODUCTION he advance in wireless sensor technologies has resulted in many new applications for military and/or civilian purposes. Many cases of these applications rely on the information of

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aggregate query processing sensor networks

aggregate query processing sensor networks. Get Price And Support. Face Capture and Recognition - ISS SecurOS FACE. SecurOS FACE is a Image Analytics Module for SecurOS and provides Face Capture & Recognition with a high accuracy level in a wide variety of challenging conditions .

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Effective processing of continuous group-by aggregate ...

They classify aggregates in sensor networks and define the structure of aggregates with a merging function f, an initializer i, and an evaluator e to compute aggregate queries in sensor networks. Approximate query processing in sensor networks is very useful due to the property of sensor networks.

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Aggregate Location Monitoring for Wireless Sensor Networks ...

Aggregate Location Monitoring for Wireless Sensor Networks: A Histogram-based Approach Chi-Yin Chow Mohamed F. Mokbel Tian He Department of Computer Science and Engineering, University of ...

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Accuracy Vs Lifetime: Linear Sketches for Appoximate ...

carried toward (aggregate) query processing in sensor networks [20,21,23]. The common approach to query processing in sensor networks has two phases. Users specify queries at the base–station using an SQL–like query language. During the dissemination phase the query layer interacts with the network layer for dissemination of the queries to ...

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aggregate query processing in sensor networks

Approximate Aggregation Techniques for Sensor Databases. tention paid to efficient query processing for aggregate queries [15, 20, 23]. In the TAG system [15], users connect to the sen- …

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Supporting Aggregate Queries Over Ad-Hoc Wireless Sensor ...

Supporting Aggregate Queries Over Ad-Hoc Wireless Sensor Networks ... WMCSA June 21, 2002 Motivation: Sensor Nets and In-Network Query Processing Many Sensor Network Applications are Data Oriented Queries Natural and Efficient Data Processing Mechanism Easy (unlike embedded C code) Enable optimizations through abstraction Aggregates Common Case ...

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