Aggregate Quarry Processing Sensor Networks
Effective processing of continuous group-by aggregate queries in sensor
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, monitoring, and event detection. However, most research has focused on aggregate queries without a group-by clause.
Sensor Networks, Wireless Sensor Network Management
Transport network independence: Customizable network geography and topology visualization: Data aggregation and fusion: Excellent support for heterogeneous nodes: Fault-tolerance, graceful processing of unreliable sensor connections: Unattended operation and interactive workflows for incident remediation: Scalability to millions of …
Interplay of Processing and Routing in Aggregate Query
This paper presents a novel approach to processing continuous aggregate queries in sensor networks, which lifts the assumption of tree-based routing. ... The Cougar approach to in-network query processing in sensor networks. SIGMOD Record 31(3), 9–18 (2002) Article Google Scholar Yao, Y., Gehrke, J.: Query processing in sensor …
Assembling regions for efficacious aggregate query processing in
The field of sensor networks is rapidly developing enabling us to deploy them to an unpredictable environment and draw diverse and interesting information from it.
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 for plant growth and abnormal event detection of industrial parameters. ... Robust and efficient aggregate query processing in wireless sensor networks. Authors: Kebin Liu, Lei Chen, Yunhao Liu, and Minglu Li Authors Info & …
Effective processing of continuous group-by aggregate …
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 …
Robust and Efficient Aggregate Query Processing in Wireless Sensor Networks
This work proposes a PCM-based data transmission scheme to "make up" the possibly lost data, and designs an intelligent path selection algorithm for this scheme that outperforms its counterparts under various sensor network conditions. Wireless sensor networks have been widely used in many applications, such as soil temperature …
Aggregate Query Processing in Ad-Hoc Sensor …
Aggregate Query Processing in Ad-Hoc Sensor Networks. Yong Yao Database lunch, Apr. 15th. Outline. Motivating Example Sensor and Sensor Network Query Model In-Network Aggregates Routing …
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 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. Due to the low …
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 for plant growth and abnormal event detection of industrial parameters. Among these applications, aggregate …
Processing approximate aggregate queries in wireless sensor networks
At each epoch, each sensor node N i calculates the partial aggregate corresponding to the query result produced by measurements obtained by sensor nodes in the subtree of N i.This calculation is performed bottom-up, where each node first waits to receive any updated partial aggregate values from its children nodes (in the aggregation …
Aggregate query processing in the presence of duplicates …
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.In this paper, we propose efficient algorithms for processing aggregate queries as well as sliding …
Routing and processing multiple aggregate queries in sensor networks …
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.
CAPS: energy-efficient processing of continuous aggregate …
Abstract: 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 …
Aggregate Queries in Wireless Sensor Networks
Conventional centered aggregate query processing techniques have the problem of high energy consumption by the sensor nodes. Thus, in order to reduce the energy consumption of sensor …
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The direct method includes sieve analysis while the indirect method involves observational, empirical and digital image processing methods. The digital image processing method with the aid of Split Desktop software was used in this study, to analyze the size of fragmentation in Obajana limestone quarry.
Assembling Regions for Efficacious Aggregate Query …
Sensor networks answer queries by finding the nodes which collect the relevant information and by combining their observations. This requires that data has to be …
Robust and Efficient Aggregate Query Processing in …
briefly overviews previous work on aggregate queries over the sensor network and Section 9 concludes this work. 2 Related work There are many works that have been …
Interplay of processing and routing in aggregate query …
This paper presents a novel approach to processing continuous aggregate queries in sensor networks, which lifts the assumption of tree-based routing. ... The Cougar approach to in-network query processing in sensor networks. SIGMOD Record 31(3), 9-18 (2002). Digital Library. Google Scholar [15] Yao, Y., Gehrke, J.: Query processing in …
Supporting Aggregate Queries Over Ad-Hoc Wireless Sensor Networks
A wireless sensor network (WSN) consists of a large number of sensor nodes that can measure and process data while communicating through wireless channels. In this paper, we propose a hybrid query processing …
Assembling regions for efficacious aggregate query …
The field of sensor networks is rapidly developing enabling us to deploy them to an unpredictable environment and draw diverse and interesting information from it. Their …
Routing and processing multiple aggregate queries in sensor networks …
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 …
Processing approximate aggregate queries in wireless sensor networks
Request PDF | Processing approximate aggregate queries in wireless sensor networks | Abstract In-network data aggregation has been recently proposed as an eective,means to reduce the number of ...
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 # Springer Science + Business Media, LLC 2008 ... applications, aggregate queries, such as SUM, COUNT, AVERAGE (AVG), MIN and MAX, are often used as statistics collected from sensors …
Effective processing of continuous group-by aggregate queries in sensor
Effective processing of continuous group-by aggregate queries in sensor networks
Rapid quality control for recycled coarse aggregates (RCA) …
The sensor-based quality control system depicted in Fig. 3 begins with the process of transporting the to-be-inspected objects via a feeder to the conveyor belt, which then …
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 # Springer Science + Business Media, LLC 2008 Abstract Wireless sensor networks have been widely used in many applications, such as soil temperature monitoring
A new certificate-based aggregate signature scheme for wireless sensor
Download Citation | A new certificate-based aggregate signature scheme for wireless sensor networks | Data transmission is one of the important basic technologies in wireless sensor networks (WSN).
Routing and processing multiple aggregate queries in sensor networks
A novel approach to processing continuous aggregate queries in sensor networks, which lifts the assumption of tree-based routing and proposes common routing structures to share the sub-aggregates at an early stage, thus further reducing the communication cost of result propagation. We present a novel approach to processing …
Interplay of Processing and Routing in Aggregate Query …
cessing aggregate queries in sensor networks [6,8]. Tree construction is performed using simple flooding algorithms [8], data-centric reinforcement strategies [6] or energy-aware …
Robust and Efficient Aggregate Query Processing in Wireless Sensor Networks
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 …
CAPS: Energy-efficient processing of continuous aggregate …
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 ...
(PDF) Interplay of Processing and Routing in Aggregate …
Interplay of Processing and Routing in Aggregate Query Optimization for Sensor Networks
Processing approximate aggregate queries in wireless sensor networks …
As we will demonstrate in this paper, the algorithms in [8] cannot be directly applied to monitoring applications over sensor networks. While the nodes in sensor networks form an aggregation tree where messages are aggregated and, therefore, the number of transmitted messages depends on the tree topology, [8] assumes a flat setup …
(PDF) Interplay of Processing and Routing in Aggregate …
Many of the WSN (wireless sensor network) techniques designed to extend the network lifetime are concentrated on modified routing protocols456, in-network processing [7, 8], node sleep scheduling ...