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With a wide scope to explore and harness the oceanic sources of interest, the field of underwater wireless sensor networks (UWSNs) is attracting a growing interest of researchers. Owing to the real-time remote data monitoring requirements, underwater acoustic sensor networks (UASNs) emerged as a preferred network to a great extent. In UASN, the limited availability and non-rechargeability of energy...
Providing complete coverage of sensing field as long as possible and maintaining the connectivity between the nodes is the main motto of the Wireless Sensor networks. The proposed system is implemented to provide maximum connectivity and extension in network-lifetime along with providing secured data transmission which is required for many applications. Maximum connected load balance cover tree algorithm...
Directional Sensor Network (DSNs) being a subdivision of WSN has attracted researchers a lot due to its wide deployment in visual monitoring applications as the continuous technical advancements have enabled us making use of low-cost camera sensors. But because of the inherent random deployment of these camera sensors, the effective area coverage is reduced. Therefore, the effective area coverage...
Amounts of data increases perform data overload is a critical issue in IT organizations. Therefore, clustering techniques are proposed for reducing the size of data to keep the performance of the entire system by selecting groups of data that is depend on their similarity. According to this k-means and hierarchical clustering techniques have been designed. The well-known techniques are clustering...
This research expands the scope of wireless sensor network (WSN) optimization from single objective to multi objective optimization. It introduces a WSN's energy-aware and coverage preserve hierarchal clustering and routing model based on multi-objective bat swarm optimization algorithm. Two objectives are taken into consideration; coverage and nodes residual energies. The proposed model optimizes...
Based on the Bounded Delaunay Triangulation, Sink nodes' optimal mobile path was designed using Calculating Algorithm of Collecting Blind Area. And there movement is optimized by Hierarchical Clustering Algorithm. Sink nodes' movement is controlled in dominant regions to partially receive information from S nodes, which can reduce the expense of maintenance transmission path, and guarantee the reliability...
One of the fundamental design issues in mobile wireless sensor networks is how to design efficient movement-assisted sensor deployment algorithms that relocate the sensor nodes in order to meet the desired performance goals. This survey focuses on a variety of movement-assisted sensor deployment algorithms that have been proposed and studied by researchers and highlights their strengths and limitations...
Clustering sensor nodes is an effective method to enhance network coverage and prolong network lifetime. In this paper we propose EAAFC (Energy Aware and Address Free Clustering), a clustering mechanism that analyses communication energy consumption and the impact of node failures on networks with different densities. The proposed algorithm aims at clustering nodes into groups with minimum number...
Wireless Sensor Networks (WSNs) consume a lot of energy in infrastructure creation and maintenance which also include topology control, i.e., coverage and connectivity. Several sleep-based topology control protocols have been proposed for better performance. While the existing protocols serve their purpose, they still consume high energy. We propose an energy-efficient protocol for Coverage, Connectivity...
One of the fundamental challenges in Wireless Sensor Networks (WSNs) is the coverage problem that consists in observing continuously and effectively a geographical area. To solve this problem, several protocols use the sensor activity scheduling mechanism that consists on turning off redundant sensors while maintaining coverage by the remaining active nodes. In this paper, we propose an efficient...
R-tree is a crucial technique for spatial index. However, coverage and overlap produced by traditional methods are big side effects. In order to minimize the overlap and reduce the coverage, this paper proposes a new R-tree construction method based on clustering algorithm which can minimize the overlap and reduce the coverage to a great extent. This method resolves effectively the clustering storage...
Mobile sensors are a viable choice for providing monitoring service on a set of Points of Interest (PoIs) in a large sensing field. In some applications, each PoI should be covered periodically (sweep coverage), and the collected data should be delivered to the sink node timely (timely transmission), namely both the sensing and transmission delay constraints for each PoI should be satisfied, which...
The positioning of sensors in Wireless Sensor Networks WSNs affect coverage, communication cost and resource management. The effectiveness of these networks is determined to a large extent by the coverage provided by the sensor deployment. Coverage is an important optimization objective in WSN deployments. Sensor positioning alludes to the capabilities of WSNs to ‘adapt’ and ‘respond’, in order to...
This paper presents a methodology for the automatic detection of sub-optimal performance in UMTS networks based on drive-test measurements. The proposed methodology can be seen as a first step towards the more ambitious objective of implementing Self-Organising Network (SON) concepts in future wireless networks. In fact, the lessons learnt from real UMTS case studies enable the identification of key...
Wireless sensor networks have become one of the most tempting networking technologies since it can be deployed without the need of a communication infrastructure. In general, there are some major concerns with this technology. That is, sensor node should have a long lasting system lifetime. And the system should keep the livability of nodes in a received level during the using process. In such systems...
Deployment problem is how to deploy a number of nodes in the area of the network so that the covered area is maximized. In this paper we consider the problem of self-deployment of a mobile sensor network. Such networks with locomotion capability are able of self-deployment; i.e., starting from some random initial configuration, the nodes in the network can distribute such that the area `covered' by...
Security plays an important role in the ability to deploy and retrieve trustworthy data for a wireless sensor network. Secure coverage is an effective defense against attacks which take advantage of a lack of deployment information. In this work, on the basis of improved genetic algorithm, a novel algorithm is proposed to guarantee the effect of secure surveillance. Comparison and simulation results...
In the field of wireless sensor network, it is one of the hottest issues of current research that how to maintain the quality of network coverage and balance nodes' energy consumption to optimize the network lifetime. This paper analyzed LEACH (low energy adaptive clustering hierarchy) and proposed an energy-efficient distributed clustering algorithm on coverage (ECAC). In the algorithm, the redundancy...
The recent advances in radio and embedded system technologies have enabled the proliferation of wireless microsensor networks. Such wirelessly connected sensors are released in many diverse environments to perform various monitoring tasks. The effectiveness of these networks is determined to a large extent by the coverage provided by the sensor deployment. The positioning of sensors affect coverage,...
Wireless sensor networks in the cluster algorithm use multi-hop style of communication, close to the sink node of the cluster head node transmit a lot of data which led to excessive energy consumption, the node is easily failure, finally network partitioning. This paper introduces the concept of the node load index and presents a demand-based load balancing algorithm for wireless sensor networks for...
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