DOI:
https://doi.org/10.14483/22484728.14801Publicado:
2018-06-29Número:
Vol. 12 Núm. 1 (2018)Sección:
Visión InvestigadoraAnálisis de ocupación espectral banda GSM 850 en Bogotá
Spectrum occupancy analysis over band GSM 850 on Bogotá
Palabras clave:
BSIC, BCCH, spectrogram, GSM, Qualipoc (en).Palabras clave:
BSIC, BCCH, espectrograma, GSM, Qualipoc (es).Descargas
Resumen (es)
Este artículo presenta un análisis de uso de canales y la medición de ocupación espectral sobre la banda GSM-850 para el enlace downlink mediante dos escenarios de medición; Se definió un sector de Bogotá, Zona norte, sobre el cual se trazó una trayectoria de sensado; identificando parámetros como BSIC, NCC, LAI, MNC, LAC, CI, canal BCCH, frecuencia Uplink, nivel de potencia entre otros; a través del equipo Qualipoc. Se evidenció una cobertura con 17 celdas a lo largo del recorrido de 2.96 Km, con reconexión en dos de las celdas identificadas, resaltando la modulación GMSK como predominante y niveles de potencia aceptables para las estaciones móviles según la norma 3GPP GSM05.05. Posteriormente se realizó la captura del espectrograma en esta misma banda identificando la convivencia de diferentes tecnologías de telefonía móvil y el uso de GSM en varios canales de frecuencias y espacios temporales, con ocupación espectral del 95.2%
Resumen (en)
This paper evidence a channels use analysis and the spectral occupancy measurement for the downlink in Bogota, Colombia, over GSM-850 band. Two test scenarios are defined. First, we select a path of 2.96 Km over North Zone Bogotá to realize the channels search and spectrum detection. The results show parameters like: BSIC, NCC, LAI, MNC, LAC, CI, BCCH channel, uplink frequency, power level received for a mobile telephony operator. Rohde & Schwarz Qualipoc was used to perform the measurements. The Qualipoc equipment found a coverage of 17 cells on the path with a reconnection state in two cells previously identified. After the analysis, we concluded that the GMSK modulation is the most used, reporting stable power level for mobile stations as specified in 3GPP GSM05.05 statement. Finally, the spectrogram measurement indicated the coexistence of different mobile technologies, and the GSM use in several frequency channels and temporal spaces, with 95.2% spectrum occupancy
Referencias
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