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Wireless sensor networks have various applications, such as environmental monitoring, forest fire detection, pollution monitoring and so on. Sensor database systems serve the applications by querying the sensor nodes and collecting sensory data from the sensor network in ways facilitated by a query language. In this paper, we introduce some advanced querying facilities as an addition to our previous...
A sensible and foresighted planned routing protocol has a vital role to add life to the sensor network. Concentrated and iterative path routing, unbalanced load emphasizing, non-scalability property and frequent beacon exchange squeezes the life of stringent energy constraint Wireless Sensor Network. WSN is a special type of Adhoc network with energy, memory and processing constraint factors for sensing...
Sensor networks are large scale networks of low power devices that collaborate in order to perform a given task. The sensors are limited in battery energy, capacity and computational power. In recent years, researcher have proposed several protocols for such sensor networks assuming that all sensors belong the same authority. In this paper, we introduce the concept of multi-domain sensor networks...
In the on-demand information retrieval from sensor network, it is difficult to utilize data collection infrastructures such as clusters and grid, which are mainly used in the proactive (continuous) information retrieval. A sink node plays an essential role to serve as on-demand query broadcaster and data collector, becoming a traffic bottleneck in the network. In this paper, we study the distribution...
Duty cycling is an important method for energy constrained sensor networks to prolong its lifetime. Current researches on duty cycling are often based on such assumption that all the sensory coverage should be maintained while some nodes are sleeping. For the applications of target monitoring, however, it is not necessary anymore to keep the whole sensory coverage of the sensor networks. It only needs...
In data-centric wireless sensor networks, the malicious nodes may selectively drop some crucial data packets, which seriously destroy the network's data collection and decrease the availability of sensor services. In this paper, we present a lightweight defense scheme against selective forwarding attacks. According to characteristics of easy positioning the nodes around transmission paths in a structured...
We present the architecture, design, and preliminary evaluation of ACme, a wireless sensor and actuator network for monitoring AC energy usage and controlling AC devices in a large and diverse building environment. The ACme system consists of three tiers: the ACme node which provides a metering and control interface to a single outlet, a network fabric which allows this interface to be exported to...
The usage of sensor network is rapidly growing, and monitoring mobile object is one of important applications of sensor network. A sensor node in the network has limited energy, and thus one key issue here is energy efficiency to prolong the network lifetime. In this paper we propose a new scheme minimizing the energy consumed for handling the path loss problem occurring between the tracking sensor...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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