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Considerable efforts have been expended on the centralised administration of WSNs. However, only very small functions, such as processing, memory, battery unit, and communication ability, can be configured using WSN nodes due to the associated resource restrictions. Moreover, unbalanced cluster construction and unbalanced energy dissipation can reduce network lifespan by a large extent. Therefore,...
Wireless Sensor Networks (WSNs) is one of the front and research hotspot in the world, and it has been used more and more widely. But in the ground location, NLOS error which reduces the localization accuracy seriously has not been well-resolved. For this, a method based on K-means clustering algorithm and improved SA algorithm is proposed in this paper. The position function of unknown node based...
Wireless sensor networks (WSNs) usually build from huge number of randomly deployed sensor nodes in certain area. The sensors are mainly utilized to monitor physical and environmental conditions, gather information, process this data locally and transfer the sensed data back to the Base Station (BS). The main objective of this paper is to simulate, evaluate and observe the behavior of developed clustering...
Appropriate cluster head selection process in hierarchical cluster based routing algorithms is vital to make the wireless sensor networks energy efficient. This paper suggests a hybrid cluster head selection method with the parameters Location centrality and Nodes' lingering energy on the fixed clusters. The simulation outcome illustrates that the proposed algorithm is good at load balancing with...
The node localization technique as a crucial technique that affects practicality, accuracy and effectiveness of the wireless sensor networks (WSNs). Sensor nodes are often deployed nonuniformly in anisotropic WSNs with holes in many applications. The existence of holes will affect the shortest distance between nodes and result in low accuracy of node localization. In this paper, an Extended Kalman...
Energy efficiency is an active research area in WSNs technology. There is an extensive research work going towards this direction and existing mechanisms fail to address the problem completely due to its limited specificity. This work focuses on the idea of enhancing the network lifetime on the basis of cluster-heads (CHs) remaining energy levels. Thus, instead of changing CHs at every round for dynamic...
In this paper, we propose a hierarchical decision fusion scheme to improve network wide detection probability for wireless sensor networks. In the proposed scheme, each sensor first makes its own local decision, and then adjusts its decision based on the decision results of its neighbors. Finally, a network wide decision fusion is applied to obtain the final decision result. Our simulation results...
Energy consumption is an important issue in the design of Wireless Sensor Networks (WSNs) which typically are powered by limited energy. A suitable clustering algorithm for grouping sensor nodes can raise energy efficiency for WSNs. However, there exist some overheads for clustering, such as cluster-head selection, assignment, and cluster construction. In this paper, we propose a new regional energy...
Many applications of Wireless Sensor Networks (WSN) require to achieve the positions of the sensor nodes within a given time bound. In this paper we study the relative and physical localizability of WSN in a given time bound. We propose a new distributed and time bounded localization algorithm based on Multidimensional Scaling (MDS) method in WSN called D-MDS localization time algorithm. We compare...
Wireless Sensor Networks (WSN) that operate unattended in harsh environments are susceptible to large scale damage, where many nodes fail simultaneously and the network gets partitioned into several disjoint segments. Restoring connectivity of structurally damaged WSN's segments may be urgent considering that they are employed to assist in risky missions. To deal with these scenarios, Mobile Data...
A consensus approach can be exploited in order to maintain a desirable performance in ad-hoc networks which require low-power consumption. We show effects of interference on the consensus scheme for ad-hoc networks in terms of BER in this paper.
Traditional clustering methods mostly concentrate on how to choose nodes to serve as cluster heads. As for cluster formation, most papers assume that a normal node joins a nearest cluster head. However, this is not an optimal solution to form a good cluster. It is shown in this paper that a cluster member may not response to the advertisement of the closest cluster head but join a farther cluster...
Wireless sensor nodes are battery-powered communication devices. Their limited capabilities have imposed various constraints to the system design of wireless sensor networks (WSNs). These constraints are interrelated, and are usually in conflict with each other. Clustering is often used to reduce energy consumption in WSNs. However, an arbitrary selection of clustering parameters may lead to severe...
Cluster formation and cluster head selection are important problems in sensor network applications and can drastically affect the network's communication energy dissipation. However, selecting the cluster head is not easy in different environments which may have different characteristics. In order to deal with this problem, we have proposed an algorithm for controlling sensor speed in wireless Sensor...
In wireless self-organized network (WSON), AOW clustering algorithms can achieve better performance and high adaptability, but having limitations in certain circumstances. In this paper, working procedure and shortcomings of AOW are introduced and analyzed firstly. Then, several modified algorithms based on AOW are designed according to system requirements. Simulation experiments are conducted to...
Clustering routing algorithm is an important and widely used method, which can prolong the lifecycle of WSN. Existing clustering algorithm due to the randomness of selecting the cluster head, it is inevitable that the agreement exists choosing cluster head unreasonable, node energy consumption unbalanced. To address the above issues, this paper presents an improved clustering routing algorithm LEACH-KED...
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...
Cluster formation and cluster head selection are important problems in sensor network applications and can drastically affect the network's communication energy dissipation. However, selecting the cluster head is not easy in different environments which may have different characteristics. In order to deal with this problem, we have proposed a power reduction algorithm for sensor networks based on...
This paper presents a clustering hierarchy protocol based on Energy Efficient Cluster Head Selection (EECHS), which aims to reduce energy consumption within the wireless sensor network and prolong the lifetime of the network. Simulation result shows that the proposed protocol (EECHS) has better performance than Based Energy Clustering (BEC) protocol in reducing energy consumption and prolonging lifetime...
The deployment of wireless sensor networks in many application areas requires self organization of the network nodes into clusters. The clustering Algorithm is a kind of key technique used to reduce energy consumption. Efficient way to enhance the lifetime of the system is to partition the network into distinct clusters with a high energy node as cluster head. The different methods of node clustering...
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