Avaya CS 1000, Fundamentals

Page: 61 / 270

Cell centers are too close
If you deploy cell centers less than 10 metres apart, the handsets can initiate unnecessary
handover. Unnecessary handover results in excessive internal messaging and degraded
speech quality.
Cell centers are too far apart
If you deploy cell centers too far apart, the edge of a cell does not overlap the coverage from
another cell.
Cell centers must be within the edge of other cell centers 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.
Place cell centers 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 for basestation locations.
• Choose locations where you can easily mount basestations.
• Install basestations as close as possible to planned locations.
• Follow safety codes, and be aware aesthetics.
• Allow sufficient access to install basestations.
• Provide clear installation instructions.
• Test the coverage during post-deployment checks.
Too many cell centers
The primary concern with deploying too many cell centers is cost. To deploy the correct number
of cell centers and minimize cost, perform the following steps:
• Verify the coverage and traffic volume before you add additional cells.
• Remove a cell served by other cells unless it is required for high handset density.
• Verify the coverage area of each cell.
• Verify that at least one area that each cell serves is not served by another cell.
In the example in Figure 32: Locating redundant cells on page 62, cell 1C3 is redundant
unless required for high handset density.
System deployment
SIP DECT Fundamentals October 2012 61