Aggregate Query Processing Sensor Networks - anrexim.in

Robust and Efficient Aggregate Query Processing in Wireless Sensor Networks Kebin Liu & Lei Chen & Yunhao Liu & Minglu Li Published online: 8 May 2008"

TinyCasper: A Privacy-Preserving Aggregate Location ...

Monitoring System in Wireless Sensor Networks Chi-Yin Chow Mohamed F. Mokbel Tian He Department of Computer Science and Engineering, University of Minnesota, Minneapolis, MN fcchow, mokbel, [email protected] ABSTRACT This demo presents a privacy-preserving aggregate location monitoring system, namely, TinyCasper, in which we can monitor moving objects in wireless sensor networks …

Data Aggregation and Query Processing in WSN - IJSER

Abstract - A wireless sensor network (WSN) ... approach of cluster based data aggregation and processing of various aggregation queries in WSN. The aggregation operations in WSN is an attractive research topic now -a- days. We have considered variety of queries involving aggregate functions and proposed an algorithm to calculate the 'MAX' aggregate function .Our algorithm …

Aggregate Location Monitoring for Wireless Sensor Networks ...

3. System Model Figure 1 depicts the system architecture of our aggre-gate location monitoring system that consists of two major components, wireless sensor network and aggregate query

Processing approximate aggregate queries in wireless ...

Abstract In-network data aggregation has been recently proposed as an eective,means to reduce the number of messages exchanged in wireless sensor networks. Nodes of the network form an aggregation ...

Query Processing for Sensor Networks - Catch-all site

Query Processing for Sensor Networks Yong Yao Johannes Gehrke Department of Computer Science Cornell University Ithaca, NY 14850 {yao,johannes}@cs.cornell.edu Abstract Hardware for sensor nodes that combine phys-ical sensors, actuators, embedded processors, and communication components has advanced significantly over the last decade, and made the large-scale deployment of such sensors a ...

Processing Approximate Aggregate Queries in Wireless ...

routing [4, 26] and in-network query processing [14, 15, 16, 28]. A survey of the applications and A survey of the applications and the challenges that sensor networks introduce is presented in [10].

Location Monitoring System in Wireless Sensor Networks ...

In the wireless sensor network, Cricket [2] is the only privacy-aware location system that provides a decentralized positioning service for its users where each user …

Supporting Spatial Aggregation in Sensor Network Databases

Supporting Spatial Aggregation in Sensor Network ... Meanwhile, theresearch work onaggregate processing in wireless sensor networks is orthogonal to our work on spatial aggregate processing. We can utilize any energy-efficient av- erage aggregate processing algorithm to process our spatial average operators. Intanagonwiwat et al. in [3] discuss direct diffusion, a set of novel techniques to ...

(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 ...

Query Processing in Sensor Networks

Query Processing in Sensor Networks R ecent advances in computing tech-nology have led to the production of a new class of computing devices: the wireless, battery-powered, smart sensor. Traditional sensors deployed throughout buildings, labs, and equipment are passive devices that simply modulate a voltage on the basis of some environmental parameter. These new sensors are active, full ...

aggregate query processing sensor networks - …

Aggregate query processing in the presence of. Aggregate query processing in the presence of duplicates in wireless sensor networks. Max regional aggregate over sensor networks, in:

Curve Query Processing in Wireless Sensor Networks - …

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

Wireless sensor network - Wikipedia

Wireless sensor networks are also used for the collection of data for monitoring of environmental information, this can be as simple as the monitoring of the temperature in a fridge to the level of water in overflow tanks in nuclear power plants.

Sensor Scheduling for Aggregate Monitoring in Wireless ...

Sensor Scheduling for Aggregate Monitoring in Wireless Sensor Networks Xingbo Yu, Sharad Mehrotra, Nalini Venkatasubramanian School of Information and Computer Science, University of California Irvine, CA 92697, USA f xyu, sharad, nalini g @ics.uci.edu Abstract Wireless sensor network is characterized by their capa-bility of generating, processing, and communicating data. They are …

aggregate query processing sensor networks

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,...

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. Sensors are devices used to collect data from the environment related to the detection or measurement of physical phenomena.

Aggregate query processing in the presence of duplicates ...

Wireless sensor networks (WSNs) have received increasing attention in the past decade. In existing studies for query processing of WSNs, each sensor node measures environmental parameters such as temperature, light and humidity around its location.

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. Therefore, a new in-network area query processing technique is necessary. The first challenge of in-network ...

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

Energy-Efficient and Robust Spatial Window Aggregation ...

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 approximate aggregate queries in wireless ...

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.

Processing Approximate Aggregate Queries in Wireless ...

Abstract. In-network data aggregation has been recently proposed as an e#ective means to reduce the number of messages exchanged in wireless sensor networks.

Robust and Efficient Aggregate Query Processing in ...

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].

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)

aggregate query processing in sensor networks

Processing Precision-Constrained Approximate … Processing Precision-Constrained Approximate Queries in Wireless Sensor Networks ... top-k, and aggregate queries) ...

Histogram and Other Aggregate Queries in Wireless Sensor ...

1 Histogram and Other Aggregate Queries in Wireless Sensor Networks Khaled Ammar and Mario A. Nascimento Department of Computing Science, University of Alberta, Edmonton, Canada