Antenna Heights   City of London

30

120.00%

25

100.00%

n

20

80.00%

tio

s

u

ite S

istrib

Frequency of Height

 of 15

60.00%

 D

erb

tive

Cumulative Distribution

m

la

u

u

N

mu

10

40.00%

C

5

20.00%

0

0.00%

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

Antenna Height

Figure 3.13:  Analysis of the Base Station Antenna Heights in the City of London  

3.2.2.6  Erlangs per MHz per Sq. Kms in Europe for GSM networks 

GSM networks in major cities in Europe have achieved between 8.35 

Erlang/km

2

/MHz to in excess of 100 Erlang/ Sq. km/MHz but the actual 

efficiency depends on the geographic area considered, density of the 

population in that area and typical busy hour. 

3.2.2.7 CDMA 

networks 

The utilisation of the CDMA networks for a few networks is shown in Figure 

Figure 3.14.  For the CDMA networks the Erlangs per MHz per Sq. Kms was 

calculated. Primary analysis suggests good utilisation figures. Also, the 

networks were not found to be congested at the current traffic levels. This is 

clearly seen from the table below: 

Erlang Density (carried & equipped) in Erlangs per Mhz per Sq Km

Erlang density

Erlang density (capacity planned)

120

100

s)

m K

/Sq.

80

hz/M

60

ity (Erlangs

40

 Dens

Erlang

20

0

Ne tw orks

Figure 3.14:  Relative spectrum utilisation of CDMA 2000 1x networks 

36