aggregate query processing sensor networks
A query requesting aggregate data is injected into the sensor network at a host node also known as a sink The query is forwarded by the host to the other nodes in the network The simplest and least optimal query plan would require each node to report its own readings back to the host node for processing After receiving all data packets from the
Systolic Query Processing for Aggregation in …
In this stone we device a novel methodology to process aggregation queries in sensor networks by using the systolic architecture. We explicitly define and stipulate the use of systolic message communication as aggregation query processing technique to yield increased response time with the saving of energy by reduced message communication when considering long running queries. We …
Processing Multiple Aggregation Queries in Geo …
To process aggregation queries issued through different sensors as access points in sensor networks, existing algorithms handle queries independently and perform in-network aggregation only at the query time. As a result of ad-hoc and independent execution of queries, no partial result is sharable and reusable among the queries. Consequently, scarce sensor network resources can be easily overconsumed, particularly, those sensors commonly accessed by queries…
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-
Query Privacy Preserving for Data Aggregation in …
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.
Poster Abstract: Routing and Processing Multiple Aggregate ...
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. The proposed algorithms, named STG and STS, iden-
Query Processing for Sensor Networks - Cornell University
3 Simple Aggregate Query Processing A simple aggregate query is an aggregate query without Group By and Having clauses, a very popular class of queries in sensor networks. In this section we outline how to process such simple aggregate queries.
aggregate query processing in sensor networks
Aggregate Query Processing In Sensor Networks. 2004 · Processing approximate aggregate queries in wireless sensor networks query processing in the evaluation ofGet Price. Kyuseok Shim s Home Pageintroduce Life is full of Serendipity. (In Korean 인생이란 아주 먼 옛날에 신이 나를 위해서 미리 준비해 놓은 소중하고 값진 것들을 하나씩 찾아 가는 기쁨 ...
Sensor network query processor - Wikipedia
A sensor network query processor (SNQP), also called a sensorDB, is a user-friendly interface for programming and running applications which translates instructions from declarative programming language with high-level instructions to low-level instructions understood by the operating system.
aggregate query processing in data warehousing
aggregate query processing meaning - huiskopeninhongarijenl aggregate query processing meaning aggregate query processing definition, optimizing aggregate queries in cache request: regionbased query processing in sensor networks the processing of grouped aggregate queri however, since a region in our approach is defined as a inside a circle having a diameter d by definition 1 Get price.
Energy-efficient and privacy-preserving spatial …
12.07.2019 · We proposed an energy-efficient and privacy-preserving spatial range aggregation query processing algorithm in WSNs. It does not depend on the pre-constructed topology structure and collects the sensing data of the specified area while ensuring the data privacy of the sensor nodes. In the query area, if attacker wants to get the original data of a node
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 Masters of Science in Computer Science and Engineering at the ...
Privacy-Preserving and Dynamic Spatial Range …
24.04.2019 · The existing privacy-preserving aggregation query processing methods in sensor networks rely on pre-established network topology and require all nodes in the network to participate in query processing. Maintaining the topology results in a large amount of energy overhead, and in many cases, the user is interested only in the aggregated query results of some areas in the network, and thus, the participation of the entire network …
Energy-Efficient Aggregate Query Evaluation in …
This stone considers the aggregate query evaluation in a sensor network database with the objective to prolong the network lifetime. We first propose an algorithm by introducing a node capability concept that balances the residual energy and the energy consumption at each node so that the network lifetime is prolonged. We then present an improved algorithm to reduce the total network energy consumption for a query …
Using Pre-aggregation for Efficient Spatial Query ...
Many applications using sensing data require the fast retrieval of aggregated information in sensor networks. In this paper, distributed spatial index structure in sensor networks for time-efficient aggregation query processing is proposed. The main idea is to logically organize sensors in underlying networks into distributed R-Tree structure, named Sensor Tree. Each node of the Sensor Tree has pre-aggregated results which are the collection of the values of aggregated …
Assembling regions for efficacious aggregate …
Assembling regions for efficacious aggregate query processing in wireless sensor networks. Author(s) Fertis, Apostolos. DownloadFull printable version (6.275Mb) Other Contributors. Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. ...
Energy-Efficient and Robust Spatial Window …
Abstract: In wireless sensor networks, users often submit spatial window aggregation queries to obtain the summary information about a local area in the monitored region, for example, "retrieving the average temperature from region A.". The current state-of-the-art spatial window aggregation query processing algorithms do not take sensor node failures into consideration, which leads to low ...
A Distributed Spatial Index for Time-Efficient …
Many applications using sensing data require the fast retrieval of aggregated information in sensor networks. In this paper, distributed spatial index structure in sensor networks for time-efficient aggregation query processing is proposed. The main idea is logically to organize sensors in underlying networks into distributed R-Tree structure, named Sensor Tree. Each node of the Sensor Tree has …
Multi-Root, Multi-Query Processing in Sensor Networks
ZMQ is based on sharing partially aggregated results of pre-configured geographic regions (called zones), and exploits the novel idea of applying a grouping technique for op- timization of multi-root, multi-query processing, by using the location attribute of sensor nodes as the grouping criterion.
CiteSeerX — Routing and Processing Multiple …
This stone presents a query-driven approach to routing and processing continuous aggregate queries in sensor networks. 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 energyefficient distributed evaluation plan.