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Topology control is one of the most fundamental problems in wireless sensor networks (WSNs). It is of great importance for prolonging network lifetime, reducing radio interference and energy consumption, increasing the efficiency of media access control (MAC) protocols and routing protocols, among other things. In this paper, the problem is transformed into a model of multi-criteria degree constrained...
We introduced the localization algorithm to find the coordinates of nodes in WSN. The proposed algorithm starts at measuring the angle and distance at the landmark and their neighbors and then finding their azimuths and incident angles. In this paper, four kinds of the method to calculate and update the coordinates of nodes are proposed. The simulation results show that to utilize more data obtained...
In this study, we propose an efficient localization scheme in wireless sensor networks. The proposed scheme utilizes mobile anchors and is based on ring overlapping. In a wireless sensor network, there are some nodes knowing their locations, which are called the reference nodes, and the other nodes without the knowledge of their locations are called the blind nodes. Based on the relative RSSI (Received...
In recent, due to convenient and inexpensive installations, flexibility, and scalability, the interests in wireless AMR are being increased more and more. However, the wireless AMR network, which generally covers large areas, may create energy wastage problem and high interference hazard due to a large amount of concurrent-intensive metering data in the network. In this paper, in order to improve...
Using multimedia sensor nodes can enhance the capability of wireless sensor networks (WSNs) for event description. In some scenarios, e.g., an erupting volcano, the WSNs are not deployed to work for long time. Instead, the WSNs aim to deliver continuous and reliable multimedia data as much as possible within an expected lifetime. In this paper, we focus on the efficient multimedia data gathering in...
Investigating realistic simulations in wireless sensor networks has been an area which has drawn a lot of research interest. These simulations are used to predict the lifetime of wireless sensor networks, evaluation of network performance and data dissemination algorithms. A discrete radio model can be used for calculating more realistic power consumption and determining which links between sensor...
Wireless sensor networks (WSNs) are used for various pervasive and ubiquitous applications. As WSNs consist of a large number of nodes that are deployed in remote and inaccessible places, there is a need for realistic power consumptions model that can be used to estimate the network life time, connectivity, and coverage. In this work, a discrete radio model is used to calculate more realistic power...
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