Query Processing for Sensor Networks - Cornell University
between sensor networks and traditional distributed database systems. Most related is work on distributed aggregation, but existing approaches do not consider the physical limitations of sensor networks [33, 38]. Aggregate operators are classified by their properties by Gray et al. [10], and an extended classification with
aggregate query processing in sensor networks
20151116&ensp·&enspworks on query processing in sensor networks have focused on aggregate queries such as COUNT, SUM and MAX, and have developed innetwork aggregation techniques that significantly reduce the amount of data transmission.
Aggregate query processing in the presence of duplicates ...
Sliding Window Aggregate Queries: A sensor network can be considered as a source of stream data. Then, the stream data can be broken into possibly overlapping partitions by specifying a window and computation can be carried out in each partition.
Aggregate Query Processing In Wireless Sensor Network
Aggregate Query Processing In Wireless Sensor Network An adaptive in-network aggregation operator for query. A wireless sensor network (WSN) is composed of tens or hundreds of spatially distributed autonomous nodes, called sensors.
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 ...
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 other queried nodes.
Processing approximate aggregate queries in wireless ...
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 aggregation tree, in which parent nodes aggregate the values received …
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...
Processing approximate aggregate queries in wireless ...
The majority of these efforts focuses on answering aggregate queries, which are of great importance to surveillance applications, and on enabling in-network processing by combining individual...
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 stone presents a novel approach to processing continuous aggre-
Routing and Processing Multiple Aggregate Queries in ...
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 reinforcement strategies or energy-aware route selection schemes.
Processing Approximate Aggregate Queries in Wireless ...
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 aggregation tree, in which parent nodes aggregate the values received from their children and propagate the result to their
Assembling Regions for Efficacious Aggregate Query ...
1.1 Query answering in sensor networks 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 propagated to the node, which will produce the answer.
(PDF) Processing approximate aggregate queries in wireless ...
Processing approximate aggregate queries in wireless sensor networks
Processing approximate aggregate queries in wireless ...
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