aggregate query processing in sensor networks

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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Routing and Processing Multiple Aggregate Queries in ...

Routing and Processing Multiple Aggregate Queries in Sensor Networks Niki Trigoni Alexandre Guitton Antonios Skordylis Abstract Tree-based routing is an energy-efficient technique for evaluating aggregate queries in sensor networks, since it enables partial aggregation of results in their way to the root. Tree construction is currently performed using simple flooding algorithms, data-centric ...

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Poster Abstract: Routing and Processing Multiple Aggregate ...

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. The proposed algorithms, named STG and STS, iden-tify common query sub-aggregates, and propose common ...

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Aggregate query processing in the presence of duplicates ...

Home Browse by Title Periodicals Information Sciences: an International Journal Vol. 297, No. C Aggregate query processing in the presence of duplicates in wireless sensor networks

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Robust and efficient aggregate query processing in ...

Mobile Networks and Applications. Periodical Home; Latest Issue; Archive; Authors; Affiliations; Home Browse by Title Periodicals Mobile Networks and Applications Vol. 13, No. 1-2 Robust and efficient aggregate query processing in wireless sensor networks Browse by Title Periodicals Mobile Networks and Applications Vol. 13, No. 1-2 Robust and efficient aggregate query

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Aggregate Query Processing in AdHoc Sensor Networks ...

PPT – Aggregate Query Processing in AdHoc Sensor Networks PowerPoint presentation free to download - id: 1299a4-NGIxY The Adobe Flash plugin is needed to view this content Get the plugin now

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Assembling Regions for Efficacious Aggregate Query ...

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 Masters of Science in Computer Science and Engineering at the ...

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Interplay of Processing and Routing in Aggregate Query ...

05/01/2008  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 evaluation plan. The proposed

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aggregate query processing sensor networks

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 . Chat Online; Another Outlier Bites the Dust

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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

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Query Processing in Sensor Networks

Query Processing in Sensor Networks R ecent advances in computing tech-nology have led to the production of a new class of computing devices: the wireless, battery-powered, smart sensor. Traditional sensors deployed throughout buildings, labs, and equipment are passive devices that simply modulate a voltage on the basis of some environmental parameter. These new sensors are active, full ...

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(PDF) Query Processing Systems for Wireless Sensor Networks

We give an overview of three distinct approaches to reducing the cost of processing aggregate queries in sensor networks: i) selection of suitable routes for collecting results of multiple queries ...

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IJA: An Efficient Algorithm for Query Processing in Sensor ...

example while simple queries, such as select and aggregate queries, in sensor networks have been addressed in the literature, the processing of join queries in sensor networks remains to be investigated. Therefore, in this paper, we propose and describe an Incremental Join Algorithm (IJA) in Sensor Networks to reduce the overhead caused by moving a join pair to the final join node or to ...

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aggregate query processing in sensor networks

aggregate query processing in sensor networks. For monitoring queries that aggregate the observed values from a group of sensor nodes suggested the construction of a greedy aggregation tree that seeks to maximize the number of aggregated messages and minimize the amount of the transmitted data To accomplish this nodes may delay sending replies to a posed query in anticipation of replies from ...

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In-Network Execution of Monitoring Queries in Sensor Networks

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 providing high quality query results. However, in ...

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Robust Management of Outliers in Sensor Network Aggregate ...

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 this paper we introduce a robust aggregation framework that can ...

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Accuracy Vs Lifetime: Linear Sketches for Appoximate ...

Query processing in sensor networks is critical for several sensor based monitoring applications and poses several challenging research problems. The in–network aggregation paradigm in sensor networks provides a versatile approach for evaluating simple aggregate queries, in which an aggregation–tree is imposed on the sensor network that is rooted at the base–station and the data

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aggregate query processing in wireless sensor network

Abstract For Aggregate Query Processing In Peer To P. aggregate query processing in wireless sensor network. On. In-Network Aggregation in Wireless Sensor Networks 1 . When compared to local processing of data wireless transmission . A query requesting aggregate data is injected into the sensor network at a host node also. Continuous Multi-dimensional Top-k Query Processing in . query ...

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Aggregate Query Processing In Wireless Sensor Network

2015-11-2returns the nal results of aggregate query processing to the server. TAG reduces overall energy consumption by sensor nodes through processing aggregate queries within the wireless sensor network instead of centralized processing 5, 11. Thus, TAG is ecient when the query region is wide or the number of sensor nodes is large. However ...

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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

Get Price

Poster Abstract: Routing and Processing Multiple Aggregate ...

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. The proposed algorithms, named STG and STS, iden-tify common query sub-aggregates, and propose

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aggregate query processing in wireless sensor network

Aggregate Location Monitoring for Wireless Sensor 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 ...

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

Keywords: Wireless sensor networks; Adaptive in-network aggregation; Query processing in WSNs 1. Introduction having a large number of sensor nodes; (ii) generally using broadcast communication; and (iii) having their location Sensors are devices used to collect data from the envi- frequently changed (Akyildiz et al., 2002). ronment to detect or measure physical phenomena. Sensors A common ...

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Aggregate Query Processing Sensor Networks

Aggregate Query Processing In Sensor Networks Aggregate query processing in sensor sing approximate aggregate queries in wireless sensor networks this is a recursive procedure which ultimately results in the evaluation of the aggregate query at the root waiting for messages from its children nodes the current node computes the new value of the partial aggregate . Robust and Efficient Aggregate ...

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Aggregate Query Processing In Wireless Sensor Networ

30/12/2020  Processing Approximate Aggregate Queries in Wireless Sensor Networks Antonios Deligiannakisa Yannis Kotidisb Nick Roussopoulosa aUniversity of Maryland bATT 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. Nodes of the network form an

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Accuracy Vs Lifetime: Linear Sketches for Appoximate ...

Query processing in sensor networks is critical for several sensor based monitoring applications and poses several challenging research problems. The in–network aggregation paradigm in sensor networks provides a versatile approach for evaluating simple aggregate queries, in which an aggregation–tree is imposed on the sensor network that is rooted at the base–station and the data

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Continuous Quantile Query Processing in Wireless Sensor ...

A major concern when processing queries within a wireless sensor network is to minimize the energy consumption of the network nodes, thus extending the networks lifetime. One way to achieve this is by minimizing the amount of communication required to answer queries. In this paper we investigate exact continuous quantile queries, focusing on the particular case of the median query. Many ...

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aggregate query processing in sensor networks

aggregate query processing in sensor networks aggregate query processing in peer to peer networks. aggregate query processing in peer to peer networks. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including quarry, aggregate, and different kinds of minerals.

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