User's Manual
1. Cell centres are too close on page 105
2. Cell centres are too far apart on page
105
3.
Too many cell centres on page 105
Cell centres are too close
If cell centres are deployed less than 10 metres apart, the handsets can initiate unnecessary
hand over. Unnecessary hand over result in excessive internal messaging and degraded
speech quality.
Cell centres are too far apart
If cell centres are deployed too far apart, the edge of a cell does not overlap the coverage from
another cell.
Cell centres must be located within the edge of other cell centres to provide satisfactory
overlap.
Overlap can be difficult to achieve where coverage is received from the floor above or the floor
below. Internal structures can cause overlap deficiencies.
It is not necessary that the cell centre be on the same floor or an adjacent floor of the area that
it is covering. It is only necessary to be within the cell boundary, as indicated by the deployment
tool.
The installation of basestations in places other than the location shown on the plan can cause
coverage problems; for example, if the basestation is mounted on the opposite side of a wall
from its planned location.
Consider the following when choosing basestation locations:
• Choose locations only where it is possible to mount basestations.
• Install basestations as close as possible to planned locations.
• Follow safety codes or aesthetic considerations.
• Allow sufficient access for installation of basestations.
• Provide clear installation instructions.
• Test the coverage during post-deployment checks.
Too many cell centres
The primary concern with deploying too many cell centres is cost. To deploy the correct number
of cell centres and reduce cost, do the following:
• Check the coverage and traffic volume before adding additional cells.
• Remove a cell served by other cells unless it is required for high handset density.
• Check the coverage area of each cell.
• Verify that there is at least one area that each cell serves that is not served by another
cell.
In the example shown in Figure 65: Locating redundant cells on page 106
, cell 1C3 is
redundant unless required for high handset density.
Single and multiple floor deployment
DMC DECT Fundamentals August 2012 105