 the correction factor table in the network dimensioning section: 0 dB for urban, -7 dB for suburban and - 16 dB for rural. The ETSI recommended values for GSM 900 are used for the building penetration loss, which are 18 dB for urban+suburban and 10 dB for rural. The standard deviation is 7 dB and the BPL deviation is 10 dB. The outdoor coverage thresholds with % location probability are the same in urban, suburban and rural areas: -95.5 dBm. The indoor coverage thresholds with 90 % location probability in urban, suburban and rural areas are accordingly -74.2 dBm, -74.2 dBm and 82.2 dBm, the maximum cell ranges for outdoor coverage in urban, suburban and rural are 5 km, 7.89 km and 14.22 km and for indoor coverage are 1.24 km, 1.96 km and 5.96 km respectively. As shown in the equations above, the point location probability is normally calculated for the cell edge. From this an equation can be derived for the area location probability, which can be used for calculation of the cell coverage area probability. Parameter F defines the part of the useful service area when R is the radius for the whole are a with at least a certain threshold x0. Parameter r is again the received signal and Pxo the probability that the received signal exceeds the threshold X0 inside area dA. The equation for the useful service area is (2.42) The mean value of the received signal strength r can be expressed as r = Po - 10y log d (2.43) for d in connection with R, as shown in Figure 2.15. The average received carrier-to-interference ratio (CIR) is Fm = a - 10y log d (2.44) where a represents the average received CIR at the distance R. The equation for the cell area location probability is (2.45) Table 2.9 Cell size and coverage threshold calculations RADIO LINK POWER BUDGET MS CLASS: GENERAL INFORMATION Frequency [MHz]: System: Receiving end Unit BS RX RF input sensitivity (TU50, R) dBm 106.00 -102.00 (Additional) fast fading margin Cable loss + connector RX antenna gain 18.00 Diversity gain Isotropic power dBm 122.50 -100.00 F=AB+C-D-E Fi