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Coexistence for LTE-Advanced and FSS Services in the 3.5GHz Band in Colombia

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Coexistence for LTE-Advanced and FSS Services in the 3.5GHz Band in Colombia.pdf (548.5 KB)
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Castellanos, German
Teuta Gomez, Guillermo
Joseph, Wout
Paz Penagos, Hernán
Abstract (Spanish)
La banda de 3,5 GHz es una candidata óptima para las redes 5G por sus características de propagación y su enorme ancho de banda. Sin embargo, servicios como el Servicio Fijo por Satélite (SFS) están utilizando esta banda en varios países. Por lo tanto, este trabajo presenta un estudio de coexistencia de los servicios Long Term Evolution - Advanced (LTE-A) y FSS en los 3500-3700 MHz en Colombia. Se realizaron simulaciones en escenarios realistas en la ciudad de Bogotá, Colombia. Los resultados preliminares muestran que los escenarios críticos son los que van desde los nodos LTE eNodeB (eNB) y Users Equipment (UE) hasta las estaciones terrenas FSS. El estudio incluye el análisis de las Bandas de Guarda (GB) y los ángulos de llegada a las Distancias de Protección (PD). Los resultados muestran que la PD depende en gran medida del ángulo de la señal interferente y de la GB utilizada. La DP para una interferencia cocanal en un escenario suburbano es superior a 250 km, en el peor de los casos, y podría reducirse hasta 17,5 km si se incluye una GB de 25 MHz y la diferencia angular de la señal LTE-A interferente es del 42⁰. Además, nuestros resultados muestran que las PD necesarias para la interferencia de los UE son 100 veces menores que las de los eNB.
Abstract (English)
The 3.5GHz band is an optimal candidate for 5G networks due to its propagation characteristics and massive bandwidth. However, services like the Fixed Satellite Service (FSS) are using this band in several countries. Therefore, this paper presents a coexistence study of the Long Term Evolution - Advanced (LTE-A) and FSS services in the 3500-3700 MHz in Colombia. Simulations were done in realistic scenarios in the city of Bogota, Colombia. Preliminary results show that critical scenarios are the ones from the LTE eNodeB (eNB) and Users Equipment (UE) nodes to the FSS earth stations. The study includes the analysis of Guard Bands (GB) and arrival angles into the Protection Distances (PD). Results show that the PD is highly dependent on the angle of the interfering signal and the GB used. The PD for a cochannel interference in a suburban scenario is higher than 250km, in the worst-case scenario, and could be reduced down to 17.5 km if a 25 MHz GB is included and the angular difference of the interfering LTE-A signal is 42⁰. Moreover, our results show that the PD needed for interference from UE are 100 times less compared to the eNB ones.
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7 páginas
URI: https://repositorio.escuelaing.edu.co/handle/001/2222
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