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C
P
ORDLESS
HONE
3.9.1
3.9.2
22
Expanded LA makes for less roaming and hand over load as well as less
complex radio environment.
Note: A new site survey should be made after physical changes in the
location area, for example, added or removed walls affect the
coverage from nearby base stations, or open up a pass way thus
creating possibility for new movement patterns.
Note: A new site survey should be made after adding or reducing the
number of ELU31 boards
Note: When adding or removing number of base station connected to
the ELU31 must a new site survey be performed.
Note: A site survey is something that often needs to be re-performed on
a site. Due to reorganizations, physical change in the building,
changed usage of certain areas or changed movement patterns.
Site survey tool
The Site Survey tool LTT 999 05/1 helps technical personnel to get a
survey of where to mount base stations to get an optimum coverage.
This can be done by placing the site survey tool/base station in a typical
position and then walking around with a portable. By setting the PP in
site survey mode an listening to the sound quality of the portable and
looking at its display, the coverage area of a radio cell can often be
found.
Site survey execution
The principle of a site survey is as follows:
•
Observe the building to find a typical area. Modern buildings usually
have standard constructions. In older buildings, due to renovations
or expansions, areas with different structures may exist. However,
inside these areas a uniformity in structure can be found again.
Find an area with a typical structure for the building and of about
the expected cell size. This area will be used to determine the
typical cell size. When having a building with different structures, do
so for each of those areas, so that differences in a typical cell size
can be detected.
•
Measure the horizontal cell size on the second floor, see figure 12
Measurement of a typical cell size. on page 23. The cell size can be
determined as follows:
–
Install the site survey base station in the middle of the typical
area. Walk away from the base station with the portable. Also
walk into rooms on the left and the right side.
5/1531-ANF 901 14 Uen D3 2013-11-28
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