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aggregate query processing in sensor networks:

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 b Kyuseok Jun-Ki Min a Raymond T. Ng b Kyuseok

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

Aggregate query processing in the presence of duplicates ...

2015-3-10 · In WSNs with such sensors, an object may be detected by several sensor nodes and processing of aggregate queries (such as COUNT, SUM and AVERAGE) becomes problematic since an identical object can be considered redundantly.

Interplay of processing and routing in aggregate query ...

2007-11-1 · 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 Abstract. This paper presents a novel approach to processing continuous aggre-gate queries in sensor networks, which lifts the assumption of tree ...

Aggregate query processing in the presence of duplicates ...

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 ...

Processing Approximate Aggregate Queries in Wireless ...

Processing Approximate Aggregate Queries in Wireless Sensor Networks Antonios Deligiannakisa Yannis Kotidisb Nick Roussopoulosa aUniversity of Maryland bAT&T Labs-Research Abstract In-network data aggregation has been recently proposed as an effective means to reduce the number of messages exchanged in wireless sensor networks.

Assembling Regions for Efficacious Aggregate Query ...

2019-4-10 · Assembling Regions for Efficacious Aggregate Query Processing in Wireless Sensor Networks by Apostolos Fertis Diploma, Electrical and Computer Engineering (2003) National Technical University of Athens Submitted to the Department of Electrical Engineering and Computer Science in partial fulfillment of the requirements of

Effective processing of continuous group-by aggregate ...

2010-12-1 · 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.

Processing approximate aggregate queries in wireless ...

2006-12-1 · Consider a node Root, which initiates a continuous query over the values observed by a set of data sources, and requests that the results of this query be reported to it at regular time periods.The time interval between two such consecutive time periods is referred to as the epoch of the query. The continuous query is disseminated through the network in search of the sensor nodes that collect ...

Interplay of Processing and Routing in Aggregate Query ...

2008-1-5 · 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 ...

Aggregate query processing in the presence of duplicates ...

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 ...

Poster Abstract: Routing and Processing Multiple

2015-10-5 · We present a novel approach to processing continuous aggregate queries in sensor networks, which lifts the as-sumption of tree-based routing. Given a query workload and a special-purpose gateway node where results are ex-pected, the query optimizer exploits query correlations in order to generate an energy-efcient distributed evaluation plan.

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-

Interplay of processing and routing in aggregate query ...

Home Browse by Title Proceedings ICDCN'08 Interplay of processing and routing in aggregate query optimization for sensor networks. Article . Interplay of processing and routing in aggregate query optimization for sensor networks. Share on. Authors: Niki Trigoni.

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.

CAPS: Energy-Efficient Processing of Continuous

2019-12-4 · CAPS: Energy-Efficient Processing of Continuous Aggregate Queries in Sensor Networks Wen Hu University of New South Wales National ICT Australia Limited [email protected] Archan Misra IBMTJWatson Research Center, Next-Gen Web Infrastructure Dept. [email protected] Rajeev Shorey IBM India Research Laboratory [email protected] Abstract

Query Processing in Sensor Networks. - ResearchGate

Two other systems, COUGAR [8] and TinyDB [9] deal with query processing in sensor networks. Cougar and TinyDB are distributed query processors that run on sensor nodes with the TinyOS [10 ...

Query Processing in Sensor Networks | Request PDF

Request PDF | Query Processing in Sensor Networks | Smart sensors are small wireless computing devices that sense information such as light and humidity at extremely high resolutions. A smart ...

Query Processing for Sensor Networks - Cornell University

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-

REQUEST: Region-Based Query Processing in Sensor

2011-4-22 · 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. A region in our approach is defined as a maximal set of nodes located within a ...

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-

Robust and Efficient Aggregate Query Processing in ...

Request PDF | Robust and Efficient Aggregate Query Processing in Wireless Sensor Networks | Wireless sensor networks have been widely used in many applications, such as soil temperature monitoring ...

Effective processing of continuous group-by aggregate ...

Abstract: Aggregate queries are one of the most important queries in sensor networks. Especially, group-by aggregate queries can be used in various sensor network applications such as tracking, mon...

[PDF] Routing and processing multiple aggregate queries

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.

An adaptive in-network aggregation operator for query ...

He is currently master degree student, partici- group. His current research interests include query processing in wireless pating of database research group in UNIFOR. Diorgens works in sensor networks and mobile databases and high performance transaction Brazilian Northeast Bank (BNB), where, from 1984 to 2003, he was systems.

Query Processing for Sensor Networks - Cornell University

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-

Aggregate Location Monitoring for Wireless Sensor

2009-9-29 · location-based query processing in wireless sensor networks. However, since all previous works in this area rely on users’ exact locations and/or identities, none of these works consider query processing over aggregate location data. Spatio-temporal histograms. Research efforts for spatio-temporal histograms aim to provide selectivity ...

TinyCasper: A Privacy-Preserving Aggregate Location ...

2008-10-26 · 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-

IJA: An Efficient Algorithm for Query Processing in

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

Efficient Iceberg Query Processing in Sensor Networks

2015-11-26 · Efficient Iceberg Query Processing in Sensor Networks Heejung Yang and Chin-Wan Chung∗ Department of Computer Science, KAIST, Daejeon 305-701, Republic of Korea ∗Corresponding author: [email protected] The iceberg query finds data whose aggregate values exceed a pre-specified threshold. To process

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