Preparing The Measurements; Handover Overlap Areas-> Base Stations Synchronisation - Aastra DECT EMEA User Manual

Measurement/Planning

Preparing the Measurements

Drawing up a situation plan:
• The situation plan records approximately the number and size of the coverage ranges required.
• The measurements provide the ideal locations for the base stations.
Radio coverage and area determination
• Make a note of the connection capacity required (number of simultaneous calls) for each area to
determine the number of base stations.
Global coverage in the supply range
First, ensure that the surface area of the planned supply range is satisfactorily covered.
The ideal locations for the base stations are determined using practical measurements.
Handover overlap areas-> Base stations synchronisation
U-Base stations
• To guarantee a clean handover, the base stations should be fitted in such a way that the -70dBm
limits are at least in contact.
• When conducting survey measurements in unfinished buildings, the limits should be increased by
10dBm.
IP-Base stations
• To guarantee synchronisation, you need to arrange the base stations of a cluster (group of RFPs
which synchronise among themselves and among which a handover is possible; 256 clusters can
be set up for each system) in such a way that there is at least one other base station within the -70
dBm limit! Aim to achieve an overlap with other base stations (fail-safe setup).
47