cti movil argentina 12.06

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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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