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This paper presents a novel scheme for avoiding congestion in the field of wireless sensor networks. Our new scheme provides a priority based approach for wireless sensor cluster network to reduce traffic load using congestion aware routing (CAR). It proposes the new mechanism for the purpose of mitigating congestion which enhances the performance of the network. The proposed mechanism uses congestion...
The energy problem in wireless sensor networks (WSN) remains one of the major barriers preventing the complete exploitation of this technology. Sensor nodes are typically powered by batteries remains a limited resource to be consumed judiciously. Efficient energy management is thus a key requirement for optimal utilization of the sensor network technology. In this work we propose a novel method to...
Key management for wireless sensor networks meets new challenges due to its special properties. However, key distribution is a key problem for wireless sensor networks key management. In this paper, literature researches on WSN key distributions are reviewed at first, and the popular key pre-distribution schemes and protocols are analyzed. Then, a new key management scheme based on the novel cryptographic...
The accuracy of the control data from different sensors in a system is evaluated by embedding a recurrent neural network with layer feedback for each sensor. The accuracy of the sensor output is calculated by comparing the values from neighboring sensor output. Here non-linear sensor model using Hammerstein-Wiener was used and the amount of sensor data fault is estimated by using kalman filter. This...
This paper presents a study of a battlefield simulation platform with consideration of sensor network and optimal resources management. This development is mainly based on two public ally available software - GECCO and REPAST. The platform allows integration with a user developed optimization engine for optimal battlefield management. A simulation example was presented to show the application to a...
Routing in a wireless sensor network field requires significant resources. Computing optimal routes using graph theoretic algorithms becomes intractable as number of nodes become very large. In this paper, authors propose an alternative using a continuous function approximation for path cost. It is based on a fluid type approximation in which the whole network is replaced by a continuum plain - where...
In this work, we carry out a comparison evaluation for mobile and static sensor nodes in Wireless Sensor Networks (WSNs) using TwoRayGround propagation model and different protocols. We consider packet-loss and delay metrics to evaluate the performance of WSN. The simulation results have shown that for WSN with mobile sensor nodes, the delay is better than static sensor nodes. In case of static sensor...
In WSN (Wireless Sensor Network), the sensor nodes may become faulty due to low battery power or some other physical defects. The faulty nodes may badly affect the network performance while trying to reach an agreement on an event. This effectively leads to deviation from the desired outcome, ineffective utilization of network bandwidth and unproductive computational overhead. In this work, we propose...
The growing popularity of sensor networks has resulted in the creation of various MAC protocols, each optimized for a different set of application requirements. However, all of these heterogeneous MAC protocols are designed under the assumption that all nodes in the wireless environment use a common MAC protocol. When multiple sensor networks are deployed in the same wireless environment, this assumption...
The task of monitoring and controlling power distribution networks is very challenging given the huge number of assets involved and their wide geographic distribution; this frames a role for wireless sensor network (WSN) applications. This paper provides an overview of the highlights from a comprehensive survey commissioned by Eskom regarding the feasibility of WSNs on the transmission and distribution...
With the advent of the low complexity wireless technology Zigbee, different cheaper and more energy efficient wireless transceivers became available on the market. These chipsets are gradually introduced in different small scale wireless applications. Especially in cases of wireless sensor networks, the low energy consumption and cost efficiency are a real gain. As such it is often used in small non-critical...
In this paper, we propose a distributed traffic-aware routing system for wireless sensor networks with multiple sinks. In multisink networks, traffic moving toward one sink may congest that moving toward others. The algorithm presented here considers the traffic of surrounding neighbors before jumping to any sink. We accomplish this by building, for each single sink, a gradient field and using gradient...
In this paper we present a data-driven approach for the problem of approximate data collection in sensor networks within the disjoint clique framework. The objective is to obtain estimations of attribute values from sensor nodes within certain error bounds while spending minimal amount of energy. Chu et al.~\cite{chu-icde06} showed that a disjoint clique model is a natural and effective way of exploiting...
In this paper, we propose a Kalman filter (KF) based tracking approach to track a target node with the assistance of anchors in an asynchronous network with clock offsets. We employ the asymmetric trip ranging (ATR) protocol to obtain TOA measurements and facilitate clock offset cancellation, and further derive a linear measurement model from the TOA measurements. Thus, the KF based on this linear...
In this paper, we evaluate the performance of WSNs for single and multi mobile events using Two Ray Ground radio model and AODV protocol. We consider good put and routing efficiency metrics to evalute the performance of WSN. The simulation results have shown that for single mobile event, the good put is better than multi mobile events when the number of sensor nodes is higher. In case of boids model,...
Most wireless sensor networks require that every large enough node contain certain properties. By using the Szemeredi's regularity lemma, one can approximate a complex network by a much simpler object in such a way that the approximation is "regular" for most pairs of partitions of this network. After obtaining a more traceable network, we establish bounds for the probability of the property...
Energy limitation is one of the most critical challenges in the area of sensor networks. Sleep scheduling mechanisms can reduce the energy consumption. Coverage mechanisms attempt to cover the area with the minimum possible number of sensors. There are many area coverage approaches which also consider the connectivity problem. However, in the area of point coverage, there are limited mechanisms that...
In a relay based two-tier sensor network the individual sensor nodes, constituting the lower tier of the network, are partitioned into clusters and transmit their data directly to their respective cluster heads. Higher-powered relay nodes act as cluster heads and form the upper tier of the sensor network, that communicates received data to the base station. In this model, if a relay node becomes faulty,...
Sensor network is a novel technology about acquiring and processing information. One fundamental issue in sensor network is the sensor placement issue, which affects the performance and lifetime of the network. Aiming at the coverage problem which is mainly considered in sensor node placement, this paper proposes an optimal sensor node placement algorithm which meets different requirements of coverage...
This paper presents a new approach to clustering wireless sensor networks and determining cluster heads. Here we apply evolutionary algorithms in centralized clustering. LEACH-C is one of the effective (basic) parameters in network life time based on energy consuming value protocol. In suggested evolutionary algorithm, through proper application of evolutionary operators, we search for efficient clustering...
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