5/1531-ANF 901 14 Uen D3 2013-11-28
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B
ASE
STATION
PLANNING
–
Determine the edge of the cell by means of the limit warning
tone. Optionally use the site survey tool and verify the sound
quality and/or the link information to define the typical cell size.
–
Do the same in the opposite direction.
•
Measure the horizontal range on the floor above, see figure 12
Measurement of a typical cell size. on page 23. Go to the floor
above or below, leaving the base station on its current location and
measure the horizontal coverage again.
In this way the horizontal and vertical coverage of a single base
station in a typical area is found. The cell size found can be taken
as an average, used to calculate the total number of base stations.
Depending on the size of the building and the type of construction,
one or two more random checks in typical areas can be done to
verify the first measurement. The typical cell size is then found by
averaging the values.
•
If the measurements does not give a satisfactory coverage,
consider using non-standard antennas. Consider the area a base
station can cover see chapter 3.4 Total area coverage on page 12.
Figure 12:Measurement of a typical cell size.
•
Making a plan with the typical cell found, start by making a sketch
of all base station positions on the ground plan. They indicate the
expected coverage for each base station on the map.
–
Verify with the site survey tool if the real coverage is as
expected from the map.
–
Especially verify coverage in difficult areas such as elevators,
stair ways and discontinuity in construction.
–
If weak areas are found, try if re-positioning a base station
solves it, otherwise plan for an extra base station.
Top floor
3:rd floor
2:nd floor
Ground floor
Base
station
