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2002 Prior systems however tend to view query processing in sensor networks simply as a powerconstrained version of traditional query processing given some set of data they 1This is a preliminary release of an article accepted by ACM Transactions on Database Systems The definitive
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2002 Prior systems however tend to view query processing in sensor networks simply as a powerconstrained version of traditional query processing given some set of data they 1This is a preliminary release of an article accepted by ACM Transactions on Database Systems The definitive
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Dec 01 2006 · Consider a node Root which initiates a continuous query over the values observed by a set of data sources and requests that the results of this query be reported to it at regular time time interval between two such consecutive time periods is referred to as the epoch of the query The continuous query is disseminated through the network in search of the sensor nodes that
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two main modules innetwork 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 spatial region that satis es a prespeci ed privacy requirement On the other side the aggregate query processing
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Jul 01 2011 · Previous studies propose innetwork aggregate query processing in which sensor nodes use aggregate operators to reduce the number of messages thereby conserving energy When multiple aggregate queries are submitted to wireless sensor networks it is possible to generate the intermediate results of these queries
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Location monitoring systems are used to detect human activities and provide monitoring services eg aggregate queries In this paper we consider an aggregate location monitoring system where wireless sensor nodes are counting sensors that are only capable of detecting the number of objects within their sensing areas As traditional query
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The results show that our system provides highquality location monitoring services for system users and guarantees the location privacy of the monitored persons Index TermsLocation privacy wireless sensor networks location monitoring system aggregate query processing spatial histogram Ç 1
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On the other side the aggregate query processing module collects and analyzes the cloaked spatial regions reported from the wireless sensor nodes to support aggregate and alarm queries over anonymized locations The prototype of TinyCasper is implemented on a physical testbed on the TinyOSMote platform with 39 MICAz motes
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Cryptanalysis of a Certificateless Aggregate Signature Scheme for Healthcare Wireless Sensor Network Yu Zhan 1 and Baocang Wang 1 2 3 1 The State Key Laboratory of Integrated Service Networks Xidian University Xi’an 710071 China
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Dec 01 2006 · Consider a node Root which initiates a continuous query over the values observed by a set of data sources and requests that the results of this query be reported to it at regular time time interval between two such consecutive time periods is referred to as the epoch of the query The continuous query is disseminated through the network in search of the sensor nodes that
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This demo presents a privacypreserving aggregate location monitoring system namely TinyCasper in which we can monitor moving objects in wireless sensor networks while preserving their location sper consists of two main modules innetwork location anonymization and aggregate query processing over anonymized the first module trusted wireless sensor nodes
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High resolution sampling of physical phenomenon is a prime application of large scale wireless sensor networks WSNs With hundreds of nodes deployed over vast tracts of land monitoring data can now be generated at unprecedented spatiotemporal scales However the limited battery life of individual nodes in the network mandates smart ways of collecting this data by maximizing localized
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This demo presents a privacypreserving aggregate location monitoring system namely TinyCasper in which we can monitor moving objects in wireless sensor networks while preserving their location privacy TinyCasper consists of two main modules innetwork location anonymization and aggregate query processing over anonymized locations
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2002 Prior systems however tend to view query processing in sensor networks simply as a powerconstrained version of traditional query processing given some set of data they 1This is a preliminary release of an article accepted by ACM Transactions on Database Systems The definitive
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query execution plans with innetwork processing which can significantly reduce resource requirements We examine the main architectural components of such a query layer concentrating on innetwork aggregation interaction of innetwork aggregation with the wireless routing protocol and distributed query processing
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Jun 01 2018 · An aggregate signature scheme is a many to one map which maps different signatures on different messages to a single signature This feature is very beneficial in an environment which is constrained by limited bandwidth and low computational timeeffort such as wireless sensor network vehicular adhoc network and Internet of things
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rangeaggregate query processing within our system Our system compiles an SQL query at the query issuer and constructs an efcient query plan that includes an optimal join order using only locally available information in the form of a histogram We argue that it is important to choose a good join order during query optimization and
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The Cougar Approach to InNetwork Query Processing in Sensor Networks SIGMOD Record Vol 31 No 3 September 2002 pp 918 6 Yong Yao and Johannes Gehrke Query Processing for Sensor Networks In Proceedings of the 1st Biennial Conference on Innovative Data Systems Research CIDR Asilomar California USA January 58 2003
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In the TinyDB system Madden et al 2002 2003 2005 users connect to the sensor network using a workstation or base station directly connected to a sensor designated as the sink Aggregate queries over the sensor data are formulated using a simple SQLlike language then distributed across the network Aggregate results
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Information is obtained from a database based on a query from a wireless subscribers device that does not support direct communications with the database A first email message containing the first query is received at a workstation Determined from the first email message are the address of the first subscriber whether the subscriber has a limited bandwidth capability and the requested
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Aug 15 2006 · In this paper we developed an optimized multiquery processing paradigm for aggregate queries we proposed an equivalence class based merging algorithm for innetwork merging of partial aggregate values of multiqueries and an adaptive fusion degree based routing scheme as a crosslayer designing technique
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properties of the network when tasking the sensors Such a sensor database system sends event data from source nodes to selected storage nodes called view nodes where the data is collected for further innetwork processing Many such sensor networks have strong constraints on their energy usage to maximize network lifetime A significant
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The query is then delegated to only those gateways that aggregate sensor readings for the particular variable in question Finally the queried gateway aggregates all the data obtained from peer gateways that satisfy thequery criteria before returning results to the client Also our gateways were deployed in a WiFi 80211g network through
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