Investigation of Close-to-wall Wireless Sensor Deployment Using 2d Finite-difference Time-domain Modelling
نویسندگان
چکیده
When Wireless Sensor Networks (WSNs) are deployed in a railway tunnel environment, the available deployment positions and equipment size are restricted by regulations from the infrastructure owners in order to maintain the loading gauge. As we have discovered in the Aldwych tunnel [1], antennas mounted near to the tunnel wall worsens the path loss (PL) performance at 868MHz and 2.45GHz. However, no literature exists concerning the detailed effects of close to wall antenna mounting and its impact on wireless sensor deployment. Currently, 2.4GHz is the preferred operating frequency, since it is employed by many of the existing commercially available low power wireless communication systems. In this paper, the Finite-Difference Time-Domain (FDTD) method [2] has been used to analytically explore the radiation patterns (RPs) of a 2.4GHz antenna mounted at different distances away from a tunnel wall constructed from different materials, i.e., cast iron, concrete and polythene.
منابع مشابه
Modified 2D Finite-Difference Time-Domain Based Tunnel Path Loss Prediction for Wireless Sensor Network Applications
To effectively deploy wireless sensor networks (WSNs) for monitoring and assessing the condition of tunnels, a Propagation Path Loss (PL) Model, which describes the power loss versus distance between the transmitter and the receiver for the tunnel environment is required. For most of the existing propagation measurements that have been conducted in tunnels, the antennas have been positioned alo...
متن کاملModified 2d Finite-difference Time-domain Technique for Tunnel Path Loss Prediction
To effectively deploy wireless sensor networks (WSNs) for monitoring and assessing the condition of tunnels, a Propagation Path Loss (PL) Model, which describes the power loss versus distance between the transmitter and the receiver in a specific environment, is required. For most of the existing propagation measurements conducted in tunnels, the antennas have been positioned along the central ...
متن کاملDesign and evaluation of two distributed methods for sensors placement in Wireless Sensor Networks
Adequate coverage is one of the main problems for distributed wireless sensor networks and The effectiveness of that highly depends on the sensor deployment scheme. Given a finite number of sensors, optimizing the sensor deployment will provide sufficient sensor coverage and save power of sensors for movement to target location to adequate coverage. In this paper, we apply fuzzy logic system to...
متن کاملDesign and evaluation of two distributed methods for sensors placement in Wireless Sensor Networks
Adequate coverage is one of the main problems for distributed wireless sensor networks and The effectiveness of that highly depends on the sensor deployment scheme. Given a finite number of sensors, optimizing the sensor deployment will provide sufficient sensor coverage and save power of sensors for movement to target location to adequate coverage. In this paper, we apply fuzzy logic system to...
متن کاملWireless sensor network design through genetic algorithm
In this paper, we study WSN design, as a multi-objective optimization problem using GA technique. We study the effects of GA parameters including population size, selection and crossover method and mutation probability on the design. Choosing suitable parameters is a trade-off between different network criteria and characteristics. Type of deployment, effect of network size, radio communication...
متن کامل