aggregate query processing sensor networks
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aggregate query processing 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 Jun-Ki Min a

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Aggregate query processing in the presence of duplicates ...

Mar 10, 2015  In addition, when the sensing areas of sensor nodes are disjoint, the coordinator of each sensor becomes itself and we perform traditional aggregate query processing. Thus, the problem we are considering is a generalization of the traditional in-network aggregation problem.

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Robust and Efficient Aggregate Query Processing in ...

May 08, 2008  高达10%返现  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

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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

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

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(PDF) Aggregate Queries in Wireless Sensor Networks

Wen-Chih Peng. 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

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Interplay of Processing and Routing in Aggregate Query ...

The TinyDB [8,9] and Cougar [14,15] projects investigate tree-based routing and scheduling techniques for processing aggregate queries like avg, count, sum, min and max in sensor networks. The concept of semantic routing trees (SRTs) [9] is used to forward queries only to children that satisfy the query

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Processing Approximate Aggregate Queries in Wireless ...

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 ...

May 08, 2008  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

Read More
(PDF) Aggregate Queries in Wireless Sensor Networks

Wen-Chih Peng. 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

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Query Processing for Sensor Networks

we introduce our model of a sensor network, sensor data, and the class of queries that we consider in this paper. We then demonstrate our algorithms to process simple aggregate queries with in-network aggregation (Section 3), and investigate the interaction between the routing layer and the query

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Processing Approximate Aggregate Queries in Wireless ...

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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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

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Optimized Query Processing for Wireless Sensor Networks

sensor networks is similar to saving and query processing in conventional database. Although infrastructure property and data properties of sensor networks is different with a central database system complementally [1]. We use declarative query in interaction networking. Declarative query playas an interface role. User able

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Energy-Efficient Multiple Routing Trees for Aggregate Query ...

Aggregate Query Evaluation in Sensor Networks Yuzhen Liu and Weifa Liang Department of Computer Science, The Australian National University Canberra, ACT 0200, Australia {yliu,wliang}@cs.anu.edu.au Abstract. In this paper we consider the problem of finding multiple routing trees in sensor networks for the evaluation of a class of aggre-

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Optimizing in-network aggregate queries in wireless sensor ...

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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an aggregate query processing system for wireless network ...

Aggregate query processing in the presence of dupli es . 3/10/2015 0183; 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 lo ion.Cited by: 6. Get Price

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Aggregation in sensor networks with a user-provided ...

Significant research has been devoted to aggregation in sensor networks with the purpose of optimizing its performance. Existing research has mostly concentrated on maximizing network lifetime with...

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CAPS: energy-efficient processing of continuous aggregate ...

Mar 17, 2006  In this paper, we design and evaluate an energy efficient data retrieval architecture for continuous aggregate queries in wireless sensor networks. We show how the modification of precision in one sensor affects the sample-reporting frequency of other sensors, and how the precisions of a group of sensors may be collectively modified to achieve the target quality of information (QoI) with ...

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Robust Aggregation in Sensor Networks

on sensor networks has been advocated [24, 29], with particular attention paid to efficient query processing for aggregation queries [24, 29, 31]. In the TAG system [24], users connect to the sensor network using a workstation or base station directly connected to a sensor designated as the sink. Aggregate queries over the sensor data are ...

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Approximate Monitoring in Wireless Sensor Networks

sensor network. A large class of sensor network appli-cations are primarily designed to monitor the physical world; continuous queries are a natural fit in this sce-nario. The goal of this paper is to devise techniques and protocols for adapting the processing of aggregate mon-itoring queries in a sensor network in order to (a) satisfy

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big data analytics reference architecture

Lower priority jobs and ad hoc analysis jobs are executed in Ad hoc Hive-Hadoop cluster. Data is replicated from the Production cluster to the Ad hoc cluster. The data analytics infrastructure at LinkedIn has been given below. Big Data Analytics Reference Architectures â Big Data on Facebook, LinkedIn and Twitter Big Data is becoming a new technology focus both in science and industry, and ...

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Query Processing for Sensor Networks

we introduce our model of a sensor network, sensor data, and the class of queries that we consider in this paper. We then demonstrate our algorithms to process simple aggregate queries with in-network aggregation (Section 3), and investigate the interaction between the routing layer and the query

Read More
(PDF) Aggregate Queries in Wireless Sensor Networks

Wen-Chih Peng. 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

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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.

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[PDF] 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. The proposed algorithms, named STG and STS ...

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Robust Aggregation in Sensor Networks

on sensor networks has been advocated [24, 29], with particular attention paid to efficient query processing for aggregation queries [24, 29, 31]. In the TAG system [24], users connect to the sensor network using a workstation or base station directly connected to a sensor designated as the sink. Aggregate queries over the sensor data are ...

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Optimizing in-network aggregate queries in wireless sensor ...

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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aggregate query processing in sensor networks-Yantai ...

Dec 16, 2020  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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TinyDB: An Acquisitional Query Processing System for ...

Acquisitional Query Processing In Sensor Networks • 125 Section 6 discusses our adaptive, power-sensitive model for query execution and result collection. 2. SENSOR NETWORK OVERVIEW We begin with an overview of some recent sensor network deployments, and then discuss properties of sensor nodes and sensor networks in general, provid-

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TinyCasper: A Privacy-Preserving Aggregate Location ...

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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REQUEST: Region-Based Query Processing in Sensor Networks ...

Apr 22, 2011  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 ...

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an aggregate query processing system for wireless network ...

Aggregate query processing in the presence of dupli es . 3/10/2015 0183; 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 lo ion.Cited by: 6. Get Price

Read More
Aggregation in sensor networks with a user-provided ...

Significant research has been devoted to aggregation in sensor networks with the purpose of optimizing its performance. Existing research has mostly concentrated on maximizing network lifetime with...

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Accuracy Vs Lifetime: Linear Sketches for Appoximate ...

1.1 Query Processing in Sensor Networks From databases perspective, in–network aggregation is a mode for evaluating aggregate queries over the sensor network. Sensor network applications rely heavily on aggregate queries. Queries are also considered a natural way for users to interact with the sensor network [23]. Therefore, several studies ...

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Synopsis Diffusion for Robust Aggregation in Sensor

Sensor Networks, Synopsis Di usion, Query Processing 1. INTRODUCTION In a large sensor network, aggregation queries often as-sume greater importance than individual sensor readings. Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are

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