• In Network Aggregation with Grouped Queries in multi-hop

    2004-8-21 · This project is about supporting aggregate queries in wireless sensor networks. Aggregate queries are queries of type MAX MIN AVG and SUM. The wireless sensor network here refers to a set of sensor nodes forming a multi-hop wireless network. Design and develop an algorithm that supports the in-network processing of a standing query of the

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  • Query Processing for Sensor Networkscsrnell.edu

    2002-12-7 · layer for sensor networks we call the component of the system that is located on each sensor node the query proxy. Architecturally on the sensor node the query proxy lies between the network layer and the application layer and the query proxy provides higher-level services through queries. Given the view of a sensor network as a huge dis-

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  • SENSOR Data-Driven Sensor Networks Final Report

    2007-3-5 · on query processing in sensor networks. It is fair to say that the postdoc position helped her to launch a successful academic career since she rst obtained a faculty position at Birkbeck College in London in 2005 and she will join Oxford University in late 2007. 2.1.2 PhD Students This project supported several doctoral students.

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  • aggregate query processing in sensor networks-Yantai

    2020-12-16 · aggregate query processing sensor networks 2016-08-02· Network Aggregate Queries in Wireless Optimizing Abstract—The sensor nodes in a aggregate. The Cougar Approach to In-Network Query Processing in In addition their plan contains an aggregation operator to aggregate data from other sensors. Figure 4 shows the query plan for the

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  • TinyCasper A Privacy-Preserving Aggregate Location

    2009-7-13 · 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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  • Medians and Beyond New Aggregation Techniques for

    2020-8-10 · 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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  • Query Processing for Sensor Networkscsrnell.edu

    2002-12-7 · layer for sensor networks we call the component of the system that is located on each sensor node the query proxy. Architecturally on the sensor node the query proxy lies between the network layer and the application layer and the query proxy provides higher-level services through queries. Given the view of a sensor network as a huge dis-

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  • Query Processing for Sensor Networkscsrnell.edu

    2002-12-7 · layer for sensor networks we call the component of the system that is located on each sensor node the query proxy. Architecturally on the sensor node the query proxy lies between the network layer and the application layer and the query proxy provides higher-level services through queries. Given the view of a sensor network as a huge dis-

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  • Aggregate Threshold Queries in Sensor NetworksIEEE

    2007-3-30 · Abstract An important class of queries over sensor networks are network-wide aggregation queries. In this work we study a class of aggregation queries which we refer to as aggregate threshold queries. The goal of an aggregate threshold query is to continuously monitor the network and give a notification every time an aggregated value crosses a predetermined threshold value.

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  • In-Network Execution of Monitoring Queries in Sensor

    2008-3-15 · works on query processing in sensor networks have focused on aggregate queries such as COUNT SUM and MAX and have developed in-network aggregation techniques that sig-nificantly reduce the amount of data transmission. Some approximate query processing techniques 7 10 6 5 were also proposed to reduce the cost of data collection while

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  • IJA An Efficient Algorithm for Query Processing in Sensor

    2011-1-28 · Accordingly each sensor node in a sensor network is regarded as a distributed database system generating a data stream and has been studied as a sensor database . In query processing of sensor networks the join operation costs much in sensor networks for correlating sensor readings like distributed database environments .

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  • Routing and processing multiple aggregate queries in

    We present 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 evaluation plan.

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  • TinyDB An Acquisitional Query Processing System for

    2020-8-10 · TinyDB An Acquisitional Query Processing System for Sensor Networks R. MADDEN Massachusetts Institute of Technology MICHAEL J. FRANKLIN and JOSEPH M. HELLERSTEIN University of California Berkeley and WEI HONG Intel Research We discuss the design of an acquisitional query processor for data collection in sensor networks. Ac-

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  • Another Outlier Bites the Dust Computing Meaningful

    2009-7-11 · sensor nodes often provide imprecise individual readings after a failure i.e. they tend to fail dirty 10 . Thus data processing applications using sensor networks must deal with information that is at times unreliable and unpredictable. In this paper we present a novel query processing frame-work for aggregate queries over a network

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  • Routing and processing multiple aggregate queries in

    We present 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 evaluation plan.

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  • Query Processing for Sensor Networkscsrnell.edu

    2002-12-7 · layer for sensor networks we call the component of the system that is located on each sensor node the query proxy. Architecturally on the sensor node the query proxy lies between the network layer and the application layer and the query proxy provides higher-level services through queries. Given the view of a sensor network as a huge dis-

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  • Accuracy vs. Lifetime Linear Sketches for Aggregate

    2008-8-1 · 1.1 Query Processing in Sensor Networks Queries are considered a natural way for users to interact with the sensor net-work 37 . Further sensor network applications rely heavily on query processing particularly of aggregate queries. In this paper we are interested in evaluating aggre-

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  • Processing Approximate Aggregate Queries in Wireless

    2007-7-3 · routing 4 26 and in-network query processing 14 15 16 28 . A survey of the applications and the challenges that sensor networks introduce is presented in 10 . For monitoring queries that aggregate the observed values from a group of sensor nodes 14 suggested the construction of a greedy aggregation tree that seeks to maximize the

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  • Processing Approximate Aggregate Queries in Wireless

    2007-7-3 · routing 4 26 and in-network query processing 14 15 16 28 . A survey of the applications and the challenges that sensor networks introduce is presented in 10 . For monitoring queries that aggregate the observed values from a group of sensor nodes 14 suggested the construction of a greedy aggregation tree that seeks to maximize the

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  • TinyCasper A Privacy-Preserving Aggregate Location

    2009-7-13 · 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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  • Robust Management of Outliers in Sensor Network

    2013-9-14 · Sensor networks are increasingly applied for monitoring diverse environments and applications. Due to their unsupervised nature of operation and inexpensive hardware used sensor nodes may fur-nish readings of rather poor quality. We thus need to devise tech-niques that can withstand "dirty" data during query processing. In

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  • Aggregate query processing in the presence of duplicates

    Aggregate query processing in the presence of duplicates in wireless sensor networks. Author links open overlay panel Jun-Ki Min a Raymond T. Ng Jun-Ki Min a Raymond T. Ng

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  • IJA An Efficient Algorithm for Query Processing in Sensor

    2014-6-21 · Thus query processing over the nodes should be constrained because of their limitations. Due to the problems the join operations in sensor networks are typically processed in a distributed manner over a set of nodes and have been studied. By way of example while simple queries such as select and aggregate queries in sensor networks

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  • Privacy-Preserving MAX/MIN Query Processing for WSN -as

    2019-5-22 · The protocol consists of two cooperative query processing algorithms that are deployed in the aggregate sensor and normal sensors. During query processing multiple rounds of secure interactions between sensors are performed. In each round one bit of the query result is determined through cooperation of sensors while the data of sensors

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  • Processing Approximate Aggregate Queries in Wireless

    2007-7-3 · routing 4 26 and in-network query processing 14 15 16 28 . A survey of the applications and the challenges that sensor networks introduce is presented in 10 . For monitoring queries that aggregate the observed values from a group of sensor nodes 14 suggested the construction of a greedy aggregation tree that seeks to maximize the

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  • Robust and Efficient Aggregate Query Processing in

    2008-5-8 · Wireless sensor networks have been widely used in many environmental monitoring applications .In most of these applications aggregate queries such as SUM COUNT AVERAGE (AVG) MIN and MAX are often used as statistics collected from sensors 12 13 22 .However it is known that data collected from sensors are often noisy for various reasons such as sensing device

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  • Aggregate query processing in the presence of duplicates

    2015-3-10 · Abstract. Wireless sensor networks (WSNs) have received increasing attention in the past decade. In existing studies for query processing of WSNs each sensor node measures environmental parameters such as temperature light and humidity around its location. Instead in our work we consider a different type of sensors that detect objects in

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