Modelización del canal inalámbrico para enlaces punto a punto empleando tecnología Zigbee en entornos exteriores - On Modeling Wireless Channel for point to point links by using Zigbee technology in Outdoors Scenarios.
DOI:
https://doi.org/10.32870/recibe.v6i1.76Keywords:
ZigBee, RSSI, modelización, canal inalámbricoAbstract
En el presente trabajo se realiza el modelización del canal de propagación para una red de comunicación punto a punto (PtP, del inglés Point-To-Point) entre dispositivos que utilizan tecnología ZigBee en entornos suburbanos a 2.4GHz, para poder brindar a la comunidad científica encargada de la planificación y dimensionamiento de redes, un modelo ajustado específicamente a redes con estas características que permitirá aumentar la eficiencia y disminuir los costos implícitos de las mismas. El modelo presentado fue obtenido al interpolar las mediciones de la potencia recibida (RSSI, del inglés Received Signal Strength Indicator) durante el despliegue de una red PtP de longitud variable de 2 a 160 metros, modificando la altura de los dispositivos en intervalos de 25 centímetros y ajustando las curvas resultantes a modelos matemáticos conocidos. En contraposición a diversos artículos de la literatura, nuestro modelo hace énfasis en el efecto causado por la altura de los dispositivos sobre la distancia a la cual se genera discontinuidad en el modelo de propagación, encontrándose que dicha discontinuidad describe un comportamiento exponencial decreciente donde a medida que la altura aumenta, la discontinuidad se aproxima al transmisor, hasta una distancia límite de 60 metros, a partir de la cual la altura de los dispositivos deja de influir en la distancia donde se produce la discontinuidad.Abstract: In the present work we are modeling a propagation channel for a point-to-point (PtP) communication network between devices, using ZigBee technology in 2.4 GHz and suburban environments, in order to provide tools for the scientific community that manage planning and sizing of networks, a model is adjusted specifically to networks with these characteristics that will allow to increase the efficiency and to reduce the implicit costs. The model presented is obtained by interpolating the Received Signal Strength Indicator (RSSI) during the deployment of a PtP network of variable length from 2 to 160 meters, modifying the height of the devices in intervals of 25 centimeters and adjusting the resulting curves to known mathematical models. In contrast to several articles in the literature, our model emphasizes the effect caused by the height of the devices over the distance to which discontinuity is generated in the propagation model, and it was found that this discontinuity describes a decreasing exponential behavior in the measure. And that the height increases, the discontinuity approaches the transmitter, up to a limit distance of 60 meters, from which the height of the devices ceases to influence the distance when the discontinuity occurs.Keywords: ZigBee, RSSI, modeling, wireless channelReferences
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