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

aggregate query processing in sensor networks - lechatbleu.nl

Energy-Efficient Aggregate Query Evaluation in Wireless Sensor Networks aggregate query evaluation problem in group aggregation to reduce the energy . Energy Efficient Routing Algorithms for Wireless Sensor . aggregate query processing in peer to peer networks with syn.

Robust and Efficient Aggregate Query Processing in ...

Wireless sensor networks have been widely used in many applications, such as soil temperature monitoring for plant growth and abnormal event detection of industrial parameters. Among these applications, aggregate queries, such as SUM, COUNT, AVERAGE, MIN and MAX are often used to collect statistical data.

Processing approximate aggregate queries in wireless ...

The development of powerful and inexpensive sensors in recent years has spurred a flurry of research in the area of sensor networks, with particular emphasis in the topics of network self-configuration , data discovery , , distributed data storage , , , energy efficient data …

Aggregate Query Processing in Ad-Hoc Sensor Networks ...

Download Presentation Aggregate Query Processing in Ad-Hoc Sensor Networks An Image/Link below is provided (as is) to download presentation. Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.

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

Poster Abstract: Routing and Processing Multiple Aggregate ...

Sensor networks, Aggregate queries. 1 Introduction Sensors are nodes with communication, computation, storage and sensing capabilities that can be deployed in large areas to monitor the ambient environment. They communi-cate their readings to one or more basestations (referred to as gateways) in a wireless multihop manner. A typical way of extracting information from a sensor network is to ...

On the Use of Histograms for Processing Exact Aggregate ...

On the Use of Histograms for Processing Exact Aggregate Queries in Wireless Sensor Networks Khaled Ammar Mario A. Nascimento Department of Computing Science,

Processing approximate aggregate queries in wireless ...

[14,15] and in-network query processing [2,5,7,16]. A survey of the applications and the challenges that sensor networks introduce is presented in [4]. For monitoring queries that aggregate the observed values from a group of sensor nodes, [5] suggested the construction of a greedy aggrega-tion tree that seeks to maximize the number of

(PDF) Aggregate Queries in Wireless Sensor Networks

Recently as efficient processing of aggregate queries for fetching desired data from sensors has been recognized as a crucial part, in-network aggregate query processing techniques are studied ...

(PDF) Aggregate Queries in Wireless Sensor Networks

In order to solve these problems and to enhance the efficiency of aggregate query processing in wireless sensor networks, this paper proposes Bucket-based Parallel Aggregation (BPA). BPA divides a ...

On the Use of Histograms for Processing Exact Aggregate ...

On the Use of Histograms for Processing Exact Aggregate Queries in Wireless Sensor Networks Khaled Ammar Mario A. Nascimento Department of Computing Science,

Robust and Efficient Aggregate Query Processing in ...

Robust and Efficient Aggregate Query Processing in Wireless Sensor Networks Kebin Liu & Lei Chen & Yunhao Liu & Minglu Li Published online: 8 May 2008

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

Processing approximate aggregate queries in wireless ...

Processing approximate aggregate queries in wireless sensor networks$ Antonios Deligiannakisa, ... and in-network query processing [2,5,7,16]. A survey of the applications and the challenges that sensor networks introduce is presented in [4]. For monitoring queries that aggregate the observed values from a group of sensor nodes, [5] suggested the construction of a greedy aggrega-tion tree …

Poster Abstract: Routing and Processing Multiple Aggregate ...

Poster Abstract: Routing and Processing Multiple Aggregate Queries in Sensor Networks Niki Trigoni Alexandre Guitton Antonios Skordylis Birkbeck College, University of London, London WC1E 7HX, United Kingdom

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.

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. A region in our approach is defined as a maximal set of nodes located within a circle having a diameter specified in the query. To …

Aggregate Location Monitoring for Wireless Sensor Networks ...

Aggregate Location Monitoring for Wireless Sensor Networks: A Histogram-based Approach ... query processing in wireless sensor networks and spatio-temporal histograms. Query processing in sensor networks. Previous related works can be classified by their underlying architecture as centralized and distributed.Thecentralized approach relies on a centralized database server that …

Query Processing for Sensor Networks - infolab.usc.edu

Query Processing for Sensor Networks Yong Yao Johannes Gehrke Department of Computer Science Cornell University Ithaca, NY 14850 {yao,johannes}@cs.cornell.edu Abstract Hardware for sensor nodes that combine phys-ical sensors, actuators, embedded processors, and communication components has advanced significantly over the last decade, and made the large-scale deployment of such sensors a ...

Complex query processing in wireless sensor networks ...

Daniel, TE, Newman, RM, Gaura, E & Mount, SNI 2007, Complex query processing in wireless sensor networks. in PM2HW2N '07 Proceedings of the 2nd ACM workshop on Performance monitoring and measurement of heterogeneous wireless and wired networks.

aggregate query processing in wireless sensor network

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

Aggregate Location Monitoring for Wireless Sensor Networks ...

Aggregate Location Monitoring for Wireless Sensor Networks: A Histogram-based Approach ... query processing in wireless sensor networks and spatio-temporal histograms. Query processing in sensor networks. Previous related works can be classified by their underlying architecture as centralized and distributed.Thecentralized approach relies on a centralized database server that …

In-Network Execution of Monitoring Queries in Sensor Networks

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 …

A Location Based Aggregation Algorithm for Selective ...

sensor networks (SNs) can be significantly reduced by ag- gregating and collecting individual sensor readings over an efficient data collection path. In this work, we focus on se-lective aggregate queries, i.e., queries that aggregate data only from a subset of all network nodes. The task of optimal data collection in such queries is an instance of the NP-hard minimal Steiner tree problem. We ...

Aggregate Query Processing Sensor Networks - anrexim

Robust and Efficient Aggregate Query Processing in Wireless Sensor Networks Kebin Liu & Lei Chen & Yunhao Liu & Minglu Li Published online: 8 May 2008”

Processing approximate aggregate queries in wireless ...

Read "Processing approximate aggregate queries in wireless sensor networks, Information Systems" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Efficient Iceberg Query Processing in Sensor Networks ...

Abstract. The iceberg query finds data whose aggregate values exceed a pre-specified threshold. To process an iceberg query in sensor networks, all sensor data have to be aggregated and then sensor data whose aggregate values are smaller than the threshold are eliminated.

Supporting Spatial Aggregation in Sensor Network Databases

Supporting Spatial Aggregation in Sensor Network ... of traditional aggregate processing for sensor networks, the spatial aggregation operators should beprocessed within the network considering power and memory constraints of the nodes. Two classes of spatial interpolation methods have been proposed in the fields of spatial statistics and computational geometry. The global methods use the ...

Accuracy Vs. Lifetime: Linear Sketches for Approximate ...

Sensor Networks, In{network Aggregation, Linear Sketch- ing, Approximate Query Answering Permission to make digital or hard copies of all or part of this work for

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