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In the previous work, we propose a node localization scheme based on three dimensional optimum space step distance in wireless sensor networks (WSNs) which is called 3D-OSSDL for short. By optimizing distances from the network model, the optimum space step distance from nodes to anchors is obtained and the coordinates of unknown nodes are derived finally. In this paper, in order to overcome the defects...
The recent advances in radio and embedded system technologies have enabled the proliferation of wireless microsensor networks. Such wirelessly connected sensors are released in many diverse environments to perform various monitoring tasks. The effectiveness of these networks is determined to a large extent by the coverage provided by the sensor deployment. The positioning of sensors affect coverage,...
Evolving networks of ad-hoc, wireless sensing nodes rely heavily on the ability to obtain position information. In this paper we first briefly analyze the theory of DV-hop algorithm. And with simulation results, we realize that the high anchor node ratio and node deployment density can improve the localization precision in random wireless sensor networks. However, this will increase the hardware cost...
This work presents an optimization approach for the broadcast operation in MANETs based on the DFCN protocol. Such approach involves a multi-objective optimization that has been tackled through the cooperation of a team of evolutionary algorithms. The proposed optimization model is a hybrid algorithm that combines a parallel island-based scheme with a hyperheuristic approach. The model includes an...
The localization algorithm in wireless sensor network is always a hot spot. Information collected by the sensors is meaningless without the position of the sensors. Now, paying little attention to 3-D space, most of the algorithms are for 2-D space. In this paper we introduce a novel algorithm for 3-D space called OBS (Optimal Beacon Selection) algorithm. In this algorithm we launched the concept...
A principal factor in sensor network design is energy efficiency. In this work, we propose to extend the lifetime of sensor networks using appropriate choice of sensor node distribution. The key idea of our scheme is to deploy more nodes in areas of extensive energy usage. Using this scheme of sensor node distribution, we use probabilistic angular routing to route data packets from the sensor nodes...
In this paper, we address the issue of transmission power control (TPC) in wireless ad hoc networks. Power control plays an important role in energy saving and network performance enhancement. However, the existing TPC schemes either face the problem of hidden and exposed terminal or have additional hardware requirements. We propose a novel distributed power control protocol, called Receiver Initiated...
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