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 Raymond T. Ng b Kyuseok Shim c. 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

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  • Processing approximate aggregate queries in wireless

    Processing approximate aggregate queries in wireless sensor networks This is a recursive procedure which ultimately results in the evaluation of the aggregate query at the Root node. After waiting for messages from its children nodes, the current node computes the new value of the partial aggregate based on the most current partial

  • Cited by: 55
  • Aggregate Query Processing In Sensor Networks

    11 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,Aggregate query processing in sensor networks.

  • 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 [21]. In this section we outline how to process such simple aggregate queries. Query processing strategies for more general queries are discussed in Section 5. 3.1 In-Network

  • (PDF) Aggregate Queries in Wireless Sensor Networks

    Recently as efficient processing of aggregate queries for fetching desired data from sensors has been recognized as a crucial part, in-network aggregate query processing techniques are studied

  • 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.

  • Robust and Efficient Aggregate Query Processing in

    Robust and Efficient Aggregate Query Processing in Wireless Sensor Networks Article in Mobile Networks and Applications 13(1-2):212-227 · April 2008 with 37 Reads How we measure 'reads'

  • 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

  • Processing approximate aggregate queries in wireless

    Processing approximate aggregate queries in wireless sensor networks Article in Information Systems 31(8):770-792 · December 2006 with 56 Reads How we measure 'reads'

  • Routing and Processing Multiple Aggregate Queries in

    This paper 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.

  • 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

    Processing approximate aggregate queries in wireless sensor networks. Authors: Antonios Deligiannakis: University of Maryland: Yannis Kotidis: Departrnent of Information Systems and Analysis, AT&T Labs-Research, NI: Nick Roussopoulos: University of Maryland: Published in: · Journal:

  • Processing approximate aggregate queries in wireless

    Dec 01, 2006· Read "Processing approximate aggregate queries in wireless sensor networks, Information Systems" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • Query Privacy Preserving for Data Aggregation in Wireless

    Finally, the nodes aggregate multiple replies into a single packet which is transmitted to BS hop-by-hop. “SafeQ: secure and efficient query processing in sensor networks,” in Proceedings of the International Conference on Information Communications, pp. 2642–2650, San Diego, CA,

  • Processing Approximate Aggregate Queries in Wireless

    Processing Approximate Aggregate Queries in Wireless Sensor Networks Antonios Deligiannakisa Yannis Kotidisb Nick Roussopoulosa aUniversity of Maryland bAT&T 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.

  • Interplay of Processing and Routing in Aggregate Query

    Interplay of Processing and Routing in Aggregate Query Optimization for Sensor Networks

  • Aggregate Location Monitoring for Wireless Sensor Networks

    location-based query processing in wireless sensor networks. However, since all previous works in this area rely on users’ exact locations and/or identities, none of these works consider query processing over aggregate location data. Spatio-temporal histograms. Research efforts for spatio-temporal histograms aim to provide selectivity

  • (PDF) Processing approximate aggregate queries in wireless

    Processing approximate aggregate queries in wireless sensor networks

  • Accuracy Vs Lifetime: Linear Sketches for Appoximate

    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 have been carried toward (aggregate) query processing in sensor networks [20,21,23]. The common approach to query processing in sensor networks has two phases.

  • TinyDB: An Acquisitional Query Processing System for

    TinyDB: An Acquisitional Query Processing System for Sensor Networks1 SAMUEL R. MADDEN of the power utilization of major elements of sensor network query processing; the results of this study are given in Appendix A. In short, we found that in a typical data collection When processing aggregate queries, some care must be taken to

  • TinyCasper: A Privacy-Preserving Aggregate Location

    This demo presents a privacy-preserving aggregate location monitoring system, namely, TinyCasper,inwhichwecan monitor moving objects in wireless sensor networks while preserving their location privacy. TinyCasper consists of two main modules, in-network location anonymization and aggregate query processing over anonymized locations.Inthe

  • Energy-Efficient Data Organization and Query Processing

    Recent sensor networks research has produced a class of data stor-age and query processing techniques called Data-Centric Storage that leverages locality-preserving distributed indexes to efficiently answer multi-dimensional range and range-aggregate queries. These distributed indexes offer a rich design space of a) logical decompo-sitions of

  • IJA: An Efficient Algorithm for Query Processing in Sensor

    Thus query processing over the nodes should be constrained because of their limitations. Due to the problems, the join operations in sensor networks are typically processed in a distributed manner over a set of nodes and have been studied. By way of example while simple queries, such as select and aggregate queries, in sensor networks

  • TinyDB: An Acquisitional Query Processing System for

    TinyDB: An Acquisitional Query Processing System for Sensor Networks1 SAMUEL R. MADDEN of the power utilization of major elements of sensor network query processing; the results of this study are given in Appendix A. In short, we found that in a typical data collection When processing aggregate queries, some care must be taken to

  • TinyCasper: A Privacy-Preserving Aggregate Location

    This demo presents a privacy-preserving aggregate location monitoring system, namely, TinyCasper,inwhichwecan monitor moving objects in wireless sensor networks while preserving their location privacy. TinyCasper consists of two main modules, in-network location anonymization and aggregate query processing over anonymized locations.Inthe

  • CiteSeerX — Multi-query optimization for sensor networks

    In this paper we consider multi-query optimization for aggregate queries on sensor networks. We develop a set of distributed algorithms for processing multiple queries that incur minimum communication while observing the computational limitations of the sensor nodes.

  • 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-

  • Poster Abstract: Energy›Efcient Data Organization and

    Recent sensor networks research has produced a class of data stor-age and query processing techniques called Data-Centric Storage that leverages locality-preserving distributedindexes like DIM,DIFS, and GHT to efciently answer multi-dimensional range and range-aggregate queries. These distributed indexes offer a rich design

  • Aggregate Query Processing In Sensor Networks

    11 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,Aggregate query processing in sensor networks.

  • REQUEST: Region-Based Query Processing in Sensor Networks

    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.

  • Routing and Processing Multiple Aggregate Queries CORE

    This paper 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.

  • Processing approximate aggregate queries in wireless

    Processing approximate aggregate queries in wireless sensor networks. Authors: Antonios Deligiannakis: University of Maryland: Yannis Kotidis: Departrnent of Information Systems and Analysis, AT&T Labs-Research, NI: Nick Roussopoulos: University of Maryland: Published in: · Journal:

  • Secure pattern based aggregation using query processing

    Abstract: Data aggregation is the technique used togather the sensor data to reduce the duplicate data transmission. It is an effectual approach for Wireless Sensor Networks (WSNs) to save energy and prolong network life time. Existing Reliable Spatial Window Aggregation (RESA) query processing algorithm proposed to reduce packet loss rate during data communication and balance the load of

  • IJA: An Efficient Algorithm for Query Processing in Sensor

    Thus query processing over the nodes should be constrained because of their limitations. Due to the problems, the join operations in sensor networks are typically processed in a distributed manner over a set of nodes and have been studied. By way of example while simple queries, such as select and aggregate queries, in sensor networks

  • K.: Asynchronous in-network prediction: Efficient

    CiteSeerX Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Given a sensor network and aggregate queries over the values sensed by subsets of nodes in the network, how do we ensure that high quality results are served for the maximum possible time? The issues underlying this question relate to the fidelity of query results and lifetime of the net-work.

  • Processing Approximate Aggregate Queries in Wireless

    Processing Approximate Aggregate Queries in Wireless Sensor Networks Antonios Deligiannakisa Yannis Kotidisb Nick Roussopoulosa aUniversity of Maryland bAT&T 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.

  • 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