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Wireless Sensor Network (WSN) is an emerging area of research in the field of communication. With the explosive growth of its applications, WSN goes through various challenges. One of the important challenges is to maintain both coverage and connectivity in WSN. In this paper, we address the issue of maintaining sensing coverage and network connectivity in WSN by keeping a minimal number of sensor...
An important practical application of secure sensor networks is to monitor an area that may be divided into a square grid, where the sensor devices may be placed at the points of intersection with reasonable precision. In this paper, a simulation method to analyze and design such a network is discussed. The use of simulation technique is essential to determine the robustness (in terms of connectivity...
Mobile sensor nodes should be well deployed so that they maximize the area coverage with the constraint that each node has at least K neighbours, where is a user-specified parameter. The MSNS (mobile sensor node simulator) designed in this paper visualizes the real map objects created by a GML, and the movement of each sensor node which autonomously extends the constrained coverage introduced by....
The wireless sensor network is characterized by its density in number of deployed sensors. In reality, sensors in the same region collect and forward, in general, the same information. In order to conserve nodes energy, it is necessary to keep active a set of nodes while others can sleep. In this paper, we present a new topology control protocol (GECP) for wireless sensor network that extends the...
Random geometric graphs are widely-used for modelling wireless ad hoc networks, where nodes are randomly deployed with each covering a finite region. The fundamental properties of random geometric graphs are often studied in the literature, such as the probability of connectivity and random coverage area. While there are numerous asymptotic results that concern the related scaling laws in very large...
Sensing coverage and network connectivity are two fundamental issues in wireless sensor networks (WSNs). Due to resource constraints of sensor nodes, it may not be possible, or necessary, to provide full coverage and/or connectivity in WSNs. Under a certain coverage and connectivity requirement, the node deployment strategy becomes a challenging issue in randomly deployed networks. In this paper,...
Wireless sensor networks (WSN) have attracted a lot attention recently. How to maintain the properties of both the full coverage and the connectivity is a hot research topic. The current research results proved that a WSN is connected when the target area is fully covered and Rc (sensor's transmission radius) is larger than twice of Rs (sensor's sensing radius). In this paper, we propose a new concept...
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