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Sweeps is a well-known localization algorithm based on the consistent connection constraints in WSN, and utilizes the concept of finite localization to relax the constraint conditions from trilateration to bilateration. In this paper, we deeply analyze the finite localization in various localization environments, and uniquely localize the finitely localized node without flip ambiguities using iterative...
The wireless sensor network node positioning is critical and has a broad prospect in military and civilian fields. The current localization algorithm is mainly divided into two types, namely localization algorithm based on distance and distance irrelevant localization algorithm. The two types of algorithms have their own advantages and disadvantages. Consider the advantages and disadvantages of the...
Aiming at the problem in the DV-hop localization algorithm that there is a large error in the process of unknown nodes to obtain the average hop distance from the beacon node. In this paper, we analyze the influence factors of the node communication radius on the average hop distance, proposed a DV-hop algorithm Based on Hierarchical Processing of average hop distance. By studying the relationship...
The paper proposes a new clustering approach based on genetic algorithms (GA) and devoted to improving energy efficiency in ad-hoc wireless sensor networks (WSN). A special designed MATLAB framework operates as test bench to evaluate different implementations. The solutions of the optimization algorithms provide the number of clusters along with the cluster structures. Real-time implementations of...
The link of wireless sensor networks used in home automation may be instable due to the effects of shadow fading. Designing a suitable routing algorithm to improve the packet delivery ratio and reduce the delay in shadow fading environment is strongly required, and therefore the Link-State-Aware Routing for Wireless Sensor Network in Home Automation (LSAR-WSNHA) algorithm is proposed. However, when...
Advance clustering techniques have been widely used in Wireless Sensor Networks (WSNs) since they can potentially reduce latency, improve scheduling, decrease end-to-end delay and optimise energy consumption within a dense network topology. In this paper, we present a novel clustering algorithm for high density IEEE 802.15.4-2015 Time-Slotted Channel Hopping (TSCH). In particular, the proposed methodology...
Wireless sensor networks are often placed in hostile and unattended areas, making the nodes exposed to many attacks. Node capture is one of the prominent attack in such networks. Whenever, a node is captured, its keys have to be revoked from the network by means of rekeying. We aim to optimize the problem of key revocation and rekeying by reducing the communication and computation overhead. An attack...
To improve the localization accuracy of wireless sensor networks (WSNs) node for underground tunnel monitoring, we propose a method to improve the localization accuracy of Received Signal Strength Indication by using the anchor node selection mechanism, which is based on the three-dimensional space characteristics of the mine and the choice of the wireless communication frequency. Firstly, we sort...
Aiming at the problem that the 3D DV-Hop localization algorithm has great error in the location of coal mine roadway, an improved three-dimensional DV-Hop fixed node location method is proposed based on the relationship between the geometric model of coal mine roadway and the sensor node. Based on the traditional 3D DV-Hop calculation hops and the lack of distance between nodes, the difference method...
In three-dimensional space, the traditional algorithm of virtual force applies to continuous target tracking process is prone to problems of distraction and short time in keeping tracking of the target in the process of. This paper proposed a three-dimensional space deployment algorithm applies to continuous target tracking to solve these problems. The combine virtual force in this algorithm is generated...
The paper will develop a wireless sensor network suitable for the medical scene of smart community for the elderly in the community to provide quality health care services for the elderly. The project will improve positioning accuracy of the elderly in the smart community through the study of positioning algorithm. Meanwhile, the project will design a routing protocol most appropriate for medical...
Aiming at the problem that the node energy is limited, the network cycle is short and the throughput is low in the wireless sensor network, Dynamic Routing Protocol Based on Clustering was proposed known as KACO (K-means and Ant Colony Optimal). At the beginning it employs ant colony optimal and k-means algorithm to form cluster, and the novel method which consider the energy ratio, node location...
A belt region is said to be k-barrier covered by a set of sensors if all paths crossing the width of the belt region intersect the sensing regions of at least k sensors. Barrier coverage can be achieved from a random initial deployment of mobile sensors by suitably relocating the sensors to form a barrier. Reducing the movement of the sensors is important in such scenarios due to the energy constraints...
This paper is aimed at solving the problem in the data acquisition process of WSN network, such as energy problem, the correlated problem of data acquisition and the dynamic problem of network topology. An efficient data collection solution based on TRIZ contradiction matrix and innovation principle is presented in the paper. Firstly, the contradiction matrix is used to obtain the corresponding principle,...
In this poster, we investigate the problem of scheduling mobile chargers in roadside wireless rechargeable sensor network. Taking mobility constraints caused by city topological graph into consideration, we aim at optimizing the traveling path for chargers to minimize the traveling cost. erefore, the scheduling problem is converted into edge coverage problem, which is substantially dierent from the...
Fast data collection is one of the most important research issues for wireless sensor networks (WSNs). In this paper, a time-division-multiple-access-based energy consumption balancing algorithm is proposed for the general $k$-hop WSNs, where one data packet is collected in one cycle. The optimal $k$ that achieves the longest network life is obtained through our theoretical analysis. Required timeslots...
The lifetime of Wireless Sensor Networks (WSNs) is significantly shortened by the energy hole problem that is caused by the many-to-one communication pattern adopted by most WSNs. Various approaches have been designed to solve the energy hole problem, and this paper considers improving the energy efficiency by deploying additional relays, which is called the Lifetime Constrained Relay Node Placement...
Recently, wireless sensor in the video surveillance system plays an important role, but the sensor operation is limited by battery capacity. Obviously, the technique to reduce power consumption is necessary. In this paper, a novel lossless embedded compression (EC) algorithm is proposed to reduce the memory bandwidth in video coding. It comprises two core techniques of Multi-directional Gradient Detection...
Many exist localization algorithms are unbiased estimators. However, the estimation performance presents biased feature in the real location systems. On the other hand, many biased location estimators show advantages that unbiased estimators can not achieve, e.g., robust to the noise, more accurate estimation and low complexity. In this paper, we propose a biased localization estimator and a hybrid...
This work presents an overboard localization system based on measuring the received signal strength indicator (RSSI) between smart lifejacket tags and one interrogator station mounted inside an unmanned aerial vehicle (UAV). Localization is based on weighted least mean squares (LMS) algorithm. Simulations that study the effect of the UAV search path on the localization accuracy are presented and it...
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