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Wireless sensor networks query processing is useful for sensing systems, such as environmental monitoring. Innetworks query processing is attracted by researchers to develop user-friendly sensing systems. Due to the sensors considered as a limited resource and battery powered devices, more robust features are recommended to limit the communication access to the sensor nodes for maximizing the sensor...
Tracking and classification application are among the most important applications for wireless sensor networks. To further enhance the tracking accuracy and reduce the conserved power, multiple targets tracking at the same time should be considered. This paper addresses the problem of dynamically query sensors, route data from multiple moving targets in a network so that the information gain is maximized...
In this paper, effective Machine-to-Machine (M2M) gateway selection algorithms for geographical region-based query are considered. Four feasible algorithms which can be used to select the M2M gateway list are proposed. The performance evaluation results of proposed algorithms are also provided.
The focus of this work is to adaptively optimize continuous queries in a wireless sensor network. Therefore, we analyze and categorize the different types of queries used by wireless sensor applications. We present a short survey on the existing algorithms that can be adapted and used to optimize the different types of queries. We present their strengths and their drawbacks and identify that continuous...
We present an optimal distributed algorithm to adapt the placement of a single operator in high communication cost networks, such as a wireless sensor network. Our parameter-free algorithm finds the optimal node to host the operator with minimum communication cost overhead. Three techniques, proposed here, make this feature possible: 1) identifying the special, and most frequent case, where no flooding...
The following papers are dealt with: software component verification; decision support system; web service; ERP; SQL; semantic data gathering; network security; software development; knowledge-based environmental information system; artificial neural network based radial bending; graph theory model; ontology-based process model; data mining; rough-neuro fuzzy network; feature extraction; query processing;...
With the further development of sensor techniques in wireless sensor networks (WSNs), it is becoming urgent that they should be able to support complicated queries like skyline query for multi-preference and decision making. In this paper, we consider skyline query evaluation in WSNs by devising evaluation algorithms for finding skyline points on a dataset progressively. The core techniques adopted...
The performance of data query processing in wireless sensor networks is greatly affected by routing protocol. Currently available data query systems usually use one routing protocol to deal with all kinds of queries. This work demonstrates that properly selecting routing protocol according to different kinds of queries can improve the performance of query processing. We propose a dynamic routing layer...
This work aims at minimize the cost of answering snapshot multi-predicate queries in high-communication-cost networks. High-communication-cost (HCC) networks is a family of networks where communicating data is very demanding in resources, for example in wireless sensor networks transmitting data drains the battery life of sensors involved. The important class of multi-predicate queries in horizontally...
Wireless sensor networks with multiple users extracting data directly from nearby sensors have many potential applications. An important problem in such a network is how to allocate the multi-hop query range for each user such that a certain global optimality is achieved. We introduce this problem and show it is NP-complete in its generic form. Distributed heuristic is proposed and evaluated with...
Service-oriented wireless sensor network (WSN) has been recently proposed as an architecture to rapidly develop applications in WSNs. In WSNs, a query task may require a set of services and may be carried out repetitively with a given frequency during its lifetime. A service composition solution shall be provided for each execution of such a persistent query task. Due to the energy saving strategy,...
Sensor networks are a sort of wireless networks; monitoring and collecting data about the natural phenomena. These sensor data behave very differently from traditional database sources: they are continuous arrival in multiple, rapid, time varying, possibly unpredictable, unbounded streams, and keeping no record of historical information. Continuous-query processing for these data streams must be run...
In this paper, we study the maximization problem of network lifetime for answering a sequence of aggregate queries based on snapshot data. We build a series of nearly optimal representative routing trees for query evaluation, where a representative routing tree is such a tree rooted at the base station that each node in it represents a set of non-tree nodes by holding their historical data (snapshot...
Recent years have seen the emergence of wireless sensor network systems that must support the real time query with the high data rate. Sensor top K query plays a critical role for energy efficient of wireless sensor system. In this paper we present the Filter based Top query monitoring system, which is an efficient and dynamic TOP query processing algorithm for distributed sensor networks. The objective...
This paper presents a threshold based query processing method for continuous data gathering in sensor networks. The method is based on the flexible setting of thresholds and the analysis on the content to be sent over the network. Thresholds represent the accuracy requirement of the application issuing the queries. Thus at each single sensor node, instead of direct delivery of each result data, data...
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