The Track Characteristics and The Propagation Model in Train Traffic For Automatic Traffic Door System

Wireless Sensor Network (WSN) is one type of distributed wireless network consisting of a set of sensor nodes for the process of sensors, monitoring, sending data and information to users through internet communication without usicables. The Process of propagating data transmission between on WSN is strongly influenced by the condition of the media being passed. Media open space conditions without obstruction is of course different from the conditions there are obstacles (in forms such as buildings, surrounding signal interference, vehicle traffic and so on). In this study we will observe the characteristics of propagation that occur on the railroad track, when there is a train passing or not crossing. The propagation characteristics observed were pathloss and fading. Pathloss is a signal attenuation that result in the loss of the amount of power in a certain distance, while fading is a change in phase, the polarization of a signal against time. The purpose of the research that will be carried out is to analyze the characteristics of propagation in WSN data that occurs along the railroad tracks when there is / does not pass trains. The results will be compared with the characteristics of the propagation model in open space without obstacles and the formulation theory of propagation characteristics. The research method created is to create a system design to be able to know RSSI data along the railroad track from the data obtained will be analytic analysis to find the magnitude of pathloss and fading. From the simulation and analytic results the propagation model will be reduced along the railroad track.