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What is the accurate way of setting the RxLevAccessMin parameter

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RxLevAccessMin Parameter is decide to allow mobile to access Network.its also used to reduce access on any BTS.

RxLevAccessMin = Mobile Sensitivity + Body loss + Multipath loss + Interference Margin

Mobile Sensitivity = -104 for GSM900 and -102 for DCS1800

Body loss :

= 3 dB recommended by ETSI and 5 dB for GSM 900 by Various Vendor

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= 3 dB recommended by ETSI and 3 dB for DCS 1800 by Various Vendor

Multipath loss = Signal loss from base station due to reflection by buildings, etc before reaching mobile.

Normally the Multipath loss is around 3 dB but can be overcome by Antenna Diversity which has gain around 3 dB too.

(Space diversity = 3 dB, 90 degrees polarized diversity = 3 dB, 45 degrees slant polarized diversity = 4.5 dB)

Interference Margin = Margin allocated to overcome C/I and C/N, the recommended value is 2 dB

RxLevAccessMin = Mobile Sensitivity + Body loss + Multipath loss + Interference Margin

RxLevAccessMin = -104 + 3 + 0 + 2 (for GSM 900 with ETSI standard)

= – 99 dBm

RxLevAccessMin = -104 + 3 + 0 + 2 (for DCS 1800)

= – 99 dBm

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