Based on the area problem of coverage hole and the complete coverage range in wireless sensing networks, in this paper, First, the expression of node coordinates is given; Second, the node deployment based on the united expression of the node coordinates is described. Third, an algorithm is programmed to calculate the area of coverage hole and the total coverage range. At last, the numerical ex...

Wireless networks are present everywhere but their management can be tricky since their coverage may contain holes even if the network is fully connected. In this paper we propose an algorithm that can build a communication tree between nodes of a wireless network with guarantee that there is no coverage hole in the tree. We use simplicial homology to compute mathematically the coverage, and Pr...

The emerging technology of wireless sensor network (WSN) is expected to provide a broad range of applications, such as battlefield surveillance, environmental monitoring, smart spaces and so on. The coverage problem is a fundamental issue in WSN, which mainly concerns with a fundamental question: How well a sensor field is observed by the deployed sensors? Mobility is exploited to improve area ...

Wireless Sensor Network (WSN) has become one of the current technologies in the world of information technology. Coverage and connectivity are the main requirement that reflects the performance and quality of services in WSN applications. In WSN applications with a large scale area, the sensor nodes are deployed randomly in a noninvasive way. The deployment process will cause some issues such a...

In wireless sensor networks, one of the fundamental issues is the coverage problem. This is, whether a given region can be sufficiently covered by sensing disks of sensors? In this paper, we discuss the coverage-hole problem by using a sensing topology. From the sensing topology, we figure out the relation between the graph Gn,n+i and coverage holes, and obtain that if m <3n/2-(5-(-1)n)/4, ther...

Wireless sensor network is the area where many researchers are focusing. The emerging technology of WSN is expected to provide a broad range of applications, such as battlefield surveillance, environmental monitoring and smart space and so on. Coverage is the important quality of service which is provided by the wireless sensor network. The coverage hole problem is a fundamental issue in WSN. T...

A Wireless Sensor Network (WSN) consists of a large number of randomly deployed sensor nodes. These sensor nodes arrange themselves into a cooperative network and perform the three basic functions of sensing, computations and communications. Wireless sensor networks (WSNs) are increasingly being used to track objects and monitor various phenomena or region of interest (RoI), where the main task...

Coverage is a key and fundamental problem in wireless sensor networks. To provide high quality of service, high coverage ratio of sensor nodes in monitored area should be assured. Coverage holes may lead to routing failure and degrade the quality of service. A novel coverage hole discovery algorithm, VCHDA, is proposed for wireless sensor networks in this paper. The proposed algorithm is based ...

Sensor random locations and sensor failures can cause coverage holes, routing voids and disconnections and thus degrade sensor network performance. In this paper, we present a self-healing approach that utilises a few mobile sensors to deal with the problems. A mobile sensor can move to an area with a coverage hole or routing void and significantly improve network performance. We design distrib...