Date post: | 11-May-2015 |
Category: |
Technology |
Upload: | carlos-yanez |
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Coverage Extension and savings in cellular infrastructure
a Solution with the VEGA antenna In Miramar – Cordoba, Argentina
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Case: Miramar – Argentina (GSM 900)
RBS Miramar-CO043The BTS CO043 nearby Miramar approximately3.8 Km distant
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Former Situation
CO043-Sector 1
Problems:Low coverage in Miramar (Cordoba)Argentina, that does not guarantee indoor service (see upper plot)
There is no leading signal. There exist3 – 4 dominant signals. ( see lower plot)The nearest BTS is CO 043 located about4 Kms. from Miramar.
The sector (CO 043 – 1)antenna aimed at the Community has the following Configuration; Antenna DB858DG65ESXAzimuth 20° tilt 1° height aprox. 90 m.
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Coverage Improvement Alternatives
Change of Antennas from Enlarging Cellular infrastructure (2 – 3 sectors) $$$$
Signal Amplifiers, Repeaters $$$
Implementation of special features,(smart radio concept, antenna hoping,Intelligent downlink diversity) $$
Use of very high gain narrow beamdual polarization antennas $
To
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The VEGA Antenna Solution
Advantages – The VEGA antenna has more than 5 dB gain and More than double the power over the existing panel antenna.
Risk – The narrow horizontal beam of the VEGA is able to reduceLateral coverage
The Best Solution – the two panel antennas DB858DG65ESX withTwo VEGA CC-12 antennas (see photo)
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Los mejores servidores por rango:Frec. 242: 94.15% de muestrasFrec. 241: 3.38% de muestrasFrec. 224: 1.85% de muestras
Los mejores servidores por rango:
Frec. 242: 48.7% de muestras
Frec. 219: 35.2% de muestras of samples
Frec. 218: 6.03% de muestras
Plots of Best Server by Sector
afterbefore
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Mejoras en niveles superiores a 15 dB. Nuevos niveles garantizan un servicio indoor You improve in levels over 15 dB. New levels guarantee a service indoor
Los niveles era inferiores a – 93 dBm con lo cual no se garantizaba cobertura indoor The levels was lower to – 93 dBm with which not cover was guaranteed indoor
Plots de Best Server por Fuerza de señaltodos los sitios Plots of Best Server by force of the places
afterbefore
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The propagation of the VEGA antenna has had a notable improvement as is observed in the coverage distribution ranks.
Plots de Propagación Frec. 242
afterbefore
% de Muestras de Propagación Frec. 242Rangos de Nivel de Señal en dBm
0.00%
10.00%
20.00%
30.00%
40.00%
50.00%
60.00%
70.00%
>71
71-8
3
83-9
3
93-1
04
Rangos
Después Antes
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Conclusions & Recommendations• La antena VEGA mejoró notablemente la cobertura y el servicio del sector 1 de CO043.• The VEGA antenna improved notably the coverage and the service of the sector 1 of CO043
• Se debe verificar que el aumento de tráfico no exceda el dimensionamiento actual de Radios del sector.
• It should be verified that the increase of traffic exceed not the dimensionamiento present of Radios of the sector .
• Si esto sucede sería recomendable aumentar un sector adicional en el sitio para distribuir el tráfico con el sector de servicio actual.
• If this happens it would be recommendable to enlarge an additional sector in the place to distribute the traffic with the sector of present service.
• Este nuevo sector debe disponer de un traslape suficiente con el sector actual de servicio para poder utilizar features como el Directed Retry para equilibrar la carga.
• This new sector should have enough overlay with the current sector in order to use features such as directed retry. This feature will contribute to balance the traffic load
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