1. New

    Opportunistic sampling-based query processing in wireless ...

    Localized information processing is a hallmark of wireless sensor network (WSN) technology. In the face of growing deploymentsizes and need for higher sensing res-olution, localized information processing techniques attempt to fill the gap between user expectations and technological limitations of WSN hardware. These techniques

  2. New

    Efficient Aggregation Processing in the Presence of ...

    Under such an environment, an object without an identifier can be detected by several sensor nodes. However, existing studies for query processing in WSNs simply assume that the sensing regions of sensors are disjoint. Thus, for query aggregation processing, effective deduplication is vital.

  3. New

    CiteSeerX — In-network Query for Wireless Sensor Networks

    CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Recently, in-network aggregate query processing techniques have problems such as high energy consumption in sensor nodes, low accuracy of query processing results, and long query processing time. In order to solve these problems and to enhance the efficiency of aggregate query processing in wireless sensor networks ...

  4. New

    On the Use of Histograms for Processing Exact Aggregate ...

    On the Use of Histograms for Processing Exact Aggregate Queries in Wireless Sensor Networks Khaled Ammar Mario A. Nascimento Department of Computing Science, University of Alberta, Canada {kammar, mn}@cs.ualberta.ca ABSTRACT Wireless Sensor Networks (WSNs) are typically used to col-lect values of some phenomena in a monitored area. In many

  5. New

    aggregate query processing sensor networks

    On the Use of Histograms for Processing Exact Aggregate ... On the Use of Histograms for Processing Exact Aggregate Queries in Wireless Sensor Networks Khaled Ammar Mario A. Nascimento Department of Computing Science, University of Alberta, Canada {kammar, mn}@cs.ualberta.ca ABSTRACT Wireless Sensor Networks (WSNs) are typically used to col-lect values of some …

  6. New

    aggregate query processing in wireless sensor network

    aggregate query processing in wireless sensor network. Aggregate Queries in Wireless Sensor Networks 25 Jun 2012 , In order to solve these problems and to enhance the efficiency of aggregate query processing in wireless .

  7. New

    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.

  8. New

    Assembling regions for efficacious aggregate query ...

    Assembling regions for efficacious aggregate query processing in wireless sensor networks ... In many cases, the whole set of values that are measured is not required by the query which is submitted to the network. The query asks for an aggregate over the measurements. The propagation of all measured values to a central computation point is ...

  9. New

    Area Query Processing Based on Gray Code in Wireless ...

    The existing techniques of in-network query processing suppress and aggregate sensed values to save energy. Nevertheless, these methods do not consider sensor coverage area as part of the results. Consequently, a new in-network area query processing technique is necessary. Due to inherent limitations of wireless sensor networks, designing an in ...

  10. New

    Aggregate Query Processing In Wireless Sensor Network

    Processing Area Queries in Wireless Sensor Networks. Processing Area Queries in Wireless Sensor Networks . techniques of in-network query processing suppress and aggregate sensing values to save energy. However, these methods cannot merge adjacent sensor coverage areas in dis-tributive manner, which is the key to area query processing.

  11. New

    Processing approximate aggregate queries in wireless ...

    Processing approximate aggregate queries in wireless sensor networks ... While the nodes in sensor networks form an aggregation tree where messages are aggregated and, therefore, ... Y. Yao, J. GehrkeThe Cougar approach to in-network query processing in sensor networks.

  12. New

    aggregate query processing sensor networks

    aggregate query processing sensor networks - machiibe. aggregate query processing sensor networks Mining is the extraction of valuable minerals or other geological materials from the earth, from an orebody, lode, vein, (coal) seam or reef, which forms the Contact Supplier; Aggregate Queries in Wireless Sensor Networks

  13. New

    Aggregate Location Monitoring for Wireless Sensor Networks ...

    components, wireless sensor network and aggregate query processor. A third major component that is not shown in the figure is a resource-efficient sensor scheduler that is responsible on tuning a trade-off between energy and bandwidth consumption of the wireless sensor network and the accuracy of the answers provided by the aggregate query ...

  14. New

    Query Processing in Sensor Networks

    Queries Data Distributed in network query processor 3 TinyDB or Cougar Wireless sensor network Query input Result collection 2 Query parsing Query optimization 1 Query result storage and display Figure 1. Architecture of a sensor network query processor. Numbers indicate the sequence of steps involved in processing a query.

  15. New

    TinyQP: A Query Processing System in Wireless Sensor ...

    In this demo we show a Query Processing system based on TinyOS in WSNs, which is called TinyQP. TinyQP provides the in-network processing of several complex queries including real time query, historical query, event detection, aggregate query, top-k query, etc. TinyQP displays the network topology in a graphical way.

  16. New

    Data Aggregation and Query Processing in WSN - IJSER

    Data Aggregation and Query Processing in WSN Ayoni Mukherjee , Sanjit Setua Abstract - A wireless sensor network (WSN) has a wide range of important applications such as remote environment monitoring , target tracking etc. This has been enabled by the availability of sensors that are smaller, cheaper and intelligent.

  17. New

    Aggregate Location Monitoring for Wireless Sensor …

    components, wireless sensor network and aggregate query processor. A third major component that is not shown in the figure is a resource-efficient sensor scheduler that is responsible on tuning a trade-off between energy and bandwidth consumption of the wireless sensor network and the accuracy of the answers provided by the aggregate query ...

  18. New

    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

  19. New

    Processing Approximate Aggregate Queries in Wireless ...

    CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): In-network data aggregation has been recently proposed as an e#ective 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 own …

  20. New

    Location-integrated Indexing and Query Processing in ...

    Query processing on mobile sensor networks requires efficient indexing and partitioning of the data space to support efficient routing as the network scales up. Building an index structure in an ad hoc manner requires two operations: localization to discover the sensor’s position; and assignment to each sensor of the appropriate

  21. New

    Curve Query Processing in Wireless Sensor Networks - IEEE ...

    Nov 26, 2014· Abstract: Most existing query processing algorithms for wireless sensor networks (WSNs) can only deal with discrete values. However, since the monitored environment always changes continuously with time, discrete values cannot describe the environment accurately and, hence, may not satisfy a variety of query requirements, such as the queries of the maximal, minimal, and inflection …

  22. New

    aggregate query processing in sensor networks

    Aggregate Query Processing in Ad-Hoc Sensor Networks ... 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 and Aggregation …

  23. New

    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

  24. New

    An adaptive in-network aggregation operator for query ...

    In this paper, we propose an adaptive in- network aggregation operator for query processing in sensor nodes of a WSN, called ADAGA (ADaptive AGgregation Algorithm for sensor networks). The ADAGA adapts its behavior according to memory and energy usage by dynamically adjusting data-collection and data-sending time intervals.

  25. New

    Continuous Quantile Query Processing in Wireless Sensor ...

    A major concern when processing queries within a wireless sensor network is to minimize the energy consumption of the network nodes, thus extending the networks lifetime. One way to achieve this is by minimizing the amount of communication required to answer queries. In this paper we investigate exact continuous quantile queries, focusing

  26. New

    Query Processing for Sensor Networks - Cornell University

    layer for sensor networks; we call the component of the system that is located on each sensor node the query proxy. Architecturally, on the sensor node, the query proxy lies between the network layer and the application layer, and the query proxy provides higher-level services through queries. Given the view of a sensor network as a huge dis-

  27. New

    Processing approximate aggregate queries in wireless ...

    Request PDF on ResearchGate | Processing approximate aggregate queries in wireless sensor networks | Abstract In-network data aggregation has been recently proposed as an eective,means to …

  28. New

    The Research on Efficient Data Aggregation Process in ...

    The Research on Efficient Data Aggregation Process in Wireless Sensor Networks Abstract A Wireless Sensor networks are characterized by restricted energy, processing power, and normally limited in communication bandwidth capabilities.

  29. New

    1 Robust Computation of Aggregates in Wireless Sensor ...

    Robust Computation of Aggregates in Wireless Sensor Networks: Distributed Randomized Algorithms and Analysis Jen-Yeu Chen, Gopal Pandurangan, Dongyan Xu Abstract A wireless sensor network consists of a large number of small, resource-constrained devices and usually operates in hostile environments that are prone to link and node failures.

  30. New

    TinyCasper: A Privacy-Preserving Aggregate Location ...

    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 anonymizedlocations. Inthe rst module, trusted wireless sensor nodes collaborate with each other to anonymize users’ exact locations by a cloaked

  31. New

    (PDF) Aggregate Queries in Wireless Sensor Networks

    PDF | 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 ...

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