Table of Contents
Advertisement
Part 1: Site Survey and Overview of DECT Systems
Site Survey Procedure
Before you start cell planning, the coverage estimation for the site should be com-
pleted and the possible Base Station locations indicated on the site map. Cell plan-
ning is done as follows:
1. At a selected Base Station location, set up the survey kit.
2. Place the Base Station near the ceiling or at a height of about 2.5m.
3. Press * 99989 * on the handset.
The handset displays the RSSI and Q values of the Base Station.
4. Move away from the Base Station and check the RSSI and Q values until they read the mini-
mum (RSSI=65, Q=52). Stop and mark this as the border of the cell on the map. Note that:
When measuring RSSI and Q values, hold the handset close to your body or shield the
aerial with the handset with your hand, pause for 2–3 seconds, take a reading and move
on.
To avoid confusion, different cell boundaries should be marked with different line patterns,
e.g. dashed line, dotted line, etc. Do not use colours as these may be lost when photo-
copying.
For a multi-storey building it must be clear on what floor the Base Station was positioned
and that the result may be several cell contours on different floors.
5. Using the following numbering conventions, name the Base Stations and cells and mark
them on the map.
xRyy : refers to the identity of the Base Station, where
x is the level (-1 is basement, 0 is ground, 1 is the 1st floor, etc)
R means this is a Base Station
yy is the Base Station position number. This number should be unique.
For example, a Base Station on the 2nd floor and with position number 4 is identified as
2R04.
xCyy : refers to the identity of the cell, where
x is the level at which the measurement was made (-1 is basement, 0 is ground, 1
is the 1st floor, etc)
C means this is a cell
yy is the position number of the Base Station being measured
For example, if measurement is made on the 2nd floor and the measured Base Station
position number is 4, the identity of the cell is 2C04.
.
6
Repeat steps 1–5 for the remaining planned Base Station positions.
7. At this stage, it may be necessary to move some of the planned Base Station positions or
add new ones to eliminate shadows or optimise cell size. If so, it may also be necessary to
do additional measurements to check that the new Base Station positions do not create
other problems.
.
5
Advertisement
Table of Contents
