Customer case aboutaggregate query processing in wireless sensor networ

aggregate query processing in wireless sensor networ

aggregate query processing in wireless sensor networ

This study proposes a method of in-network aggregate query processing to reduce the number of messages incurred in a wireless sensor network. When aggregate queries are issued to the resource-constrained wireless sensor network, it is important to efficiently perform these queries. Given a set of multiple aggregate queries, the proposed approach shares intermediate results among queries to

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Robust and Efficient Aggregate Query Processing in

2008-5-8  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 Among these applications, aggregate queries, such as SUM, COUNT, AVERAGE, MIN and MAX are often used to collect statistical data.

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Processing Approximate Aggregate Queries in Wireless

2007-7-3  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.

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Aggregate query processing in the presence of

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.

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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

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Optimizing Multiple In-Network Aggregate Queries in

2007-6-29  in-network query processing for power saving in wireless sensor networks [3][5][6]. Prior works [2][6] explore the feature of in-network aggregation in which sensor nodes in a routing tree are able to perform aggregate operators. The authors in [1] proposed in-network materialized view that could be shared by multiple

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Optimizing in-network aggregate queries in wireless

When aggregate queries are issued to the resource-constrained wireless sensor network, it is important to efficiently perform these queries. Given a set of multiple aggregate queries, the proposed approach shares intermediate results among queries to reduce the number of messages. When the sink receives multiple queries, it should be propagated these queries to a wireless sensor network via existing

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Approximate in Wireless Sensor cs.cityu.edu.hk

2014-5-29  Keywords: Wireless sensor network, aggregate query evaluation, network lifetime, snapshot-based query, correlated data gathering, representative routing tree. I. INTRODUCTION Sensor networks have been used for environmental mon-itoring purposes [10]. During this course, the large volume of sensed data generated by sensors is needed to be either

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Reliable spatial window aggregation query processing

2012-9-1  After wireless sensor network is deployed, users often submit spatial window aggregation queries to obtain statistical information of the regions of interest, such as maximum temperature, average humidity etc. Existing spatial window aggregation query processing algorithms are based on the assumption that the communication links are ideal which means there are perfect communication links

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KNN Query Processing in Wireless Sensor and Robot

2017-1-31  KNN Query Processing in Wireless Sensor and Robot Networks Wei Xie Thesis submitted to the Faculty of Graduate and Postdoctoral Studies In partial fulfillment of the requirements For the Master of Electrical and Computer Engineering degree Ottawa-Carleton Institute for Computer Science School of Information Technology and Engineering (SITE)

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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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Optimizing Multiple In-Network Aggregate Queries in

2007-6-29  in-network query processing for power saving in wireless sensor networks [3][5][6]. Prior works [2][6] explore the feature of in-network aggregation in which sensor nodes in a routing tree are able to perform aggregate operators. The authors in [1] proposed in-network materialized view that could be shared by multiple

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Energy-Efficient Multiple Routing Trees for Aggregate

2014-5-29  In wireless sensor networks, each sensor periodically measures the physical en- Such data gathering query processing is referred to as in-network processing, query, which is also called fully aggregate query in [10]. Such aggregate queries in databases include the popular operations AVG, MIN, MAX, COUNT,etc.

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Optimizing in-network aggregate queries in wireless

[[abstract]]This study proposes a method of in-network aggregate query processing to reduce the number of messages incurred in a wireless sensor network. When aggregate queries are issued to the resource-constrained wireless sensor network, it is important to efficiently perform these queries. Given a set of multiple aggregate queries, the

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TinyCasper: A Privacy-Preserving Aggregate Location

2016-5-21  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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Query Processing for Sensor Networks

2002-12-7  the client. Sophisticated catalog management, query optimization, and query processing techniques will ab-stract the user from the physical details of contact-ing the relevant sensors, processing the sensor data, and sending the results to the user. Thus one of the main roles of the query layer is to process declarative queries.

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KNN Query Processing in Wireless Sensor and Robot

2017-1-31  In Wireless Sensor and Robot Networks (WSRNs), static sensors report event information to one of the robots. In the k nearest neighbour query processing problem in WSRNs, the robot receives event report needs to find exact k nearest robots (KNN) to

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Area Query Processing Based on Gray Code in Wireless

2018-4-18  The existing techniques of in-network query processing suppress and aggregate sensed values to save energy. Nevertheless, these methods do not consider sensor coverage area as part of the results. Consequently, a new in-network area query processing technique is necessary. Due to inherent limitations of wireless sensor

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Query Privacy Preserving for Data Aggregation in

2020-2-24  Wireless Sensor Networks (WSNs) are increasingly involved in many applications. However, communication overhead and energy efficiency of sensor nodes are the major concerns in WSNs. In addition, the broadcast communication mode of WSNs makes the network vulnerable to privacy disclosure when the sensor nodes are subject to malicious behaviours.

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Optimizing Multiple In-Network Aggregate Queries in

2007-6-29  in-network query processing for power saving in wireless sensor networks [3][5][6]. Prior works [2][6] explore the feature of in-network aggregation in which sensor nodes in a routing tree are able to perform aggregate operators. The authors in [1] proposed in-network materialized view that could be shared by multiple

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aggregate query processing in sensor networks

2019-6-2  an aggregate query processing system for wireless network. Query Processing in Sensor Networks. and processing. Because of limitations imposed by this impoverished computing environment, data collection systems in sensor net works must support an unusual Distributed in network query processor. 3. TinyDB or Cougar.

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1 Robust Computation of Aggregates in Wireless Sensor

2007-2-9  For cooperative processing in a sensor network, the information of interest is not the data at an individual sensor node, but the aggregate statistics (aggregates) amid a group of sensor nodes [19], [15]. Possible applications using aggregates are the average temperature, the average gas

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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

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Complex query processing in wireless sensor networks

Complex query processing in wireless sensor networks. Madden, S., Szewczyk, R., Franklin, M. J. and Culler, D. (2002) 'Supporting Aggregate Queries Over Ad-Hoc Wireless Sensor Networks.' In Proceedings IEEE Workshop on Mobile Computing Systems and Applications, 49--58.

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Supporting Spatial Aggregation in Sensor Network

2016-5-21  network processing of the aggregation queries on the data generated in the sensor network. We use the ad-hoc query routing algorithm of TAG to disseminate our query into the network. Our spatial aggregate operators are compatible with the aggregate processing of TAG and easily portable to TinyDB. Zhao et al. in [9] introduce an architecture for

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Query Processing for Sensor Networks

2002-12-7  the client. Sophisticated catalog management, query optimization, and query processing techniques will ab-stract the user from the physical details of contact-ing the relevant sensors, processing the sensor data, and sending the results to the user. Thus one of the main roles of the query layer is to process declarative queries.

get price

Area Query Processing Based on Gray Code in Wireless

2018-4-18  The existing techniques of in-network query processing suppress and aggregate sensed values to save energy. Nevertheless, these methods do not consider sensor coverage area as part of the results. Consequently, a new in-network area query processing technique is necessary. Due to inherent limitations of wireless sensor

get price

KNN Query Processing in Wireless Sensor and Robot

2017-1-31  In Wireless Sensor and Robot Networks (WSRNs), static sensors report event information to one of the robots. In the k nearest neighbour query processing problem in WSRNs, the robot receives event report needs to find exact k nearest robots (KNN) to

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Opportunistic sampling-based query processing in

2015-1-4  Geoinformatica (2013) 17:567–597 DOI 10.1007/s10707-012-0170-y Opportunistic sampling-based query processing in wireless sensor networks Muhammad UmerEgemen TaninLars Kulik Received: 2 November 2010 / Revised: 13 August 2012 /

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