DAP deployment rules and requirements 27
6 Ask about and record the mobility of the users. For example,
do the users move from cell to cell, or is the area of movement
restricted, such that the users remain within one cell?
--End--
DAP deployment rules and requirements
Use the information in this section to plan the deployment of a SIP DECT
system, including the locations of basestations and cells. The deployment
process consists of the following.
•
“Radio synchronization” (page 27)
• “IP network configuration” (page 31)
•
“DAP power configuration” (page 34)
• “Initial critical points on the floor plan to identify” (page 34).
•
“Rules and guidelines to locate cell centers” (page 35).
•
“Determine cell boundaries” (page 38).
•
“Identify critical points and cell boundaries” (page 39).
•
“Mark the points, centers, and boundaries on the floor plan” (page 40).
Radio synchronization
The radio network structure supports seamless hand over of existing calls.
This means that, during a call, if a handset moves from the coverage area
of one DAP into the coverage area of another DAP, the new DAP can take
over the call. The call is not interrupted, and you are not aware of the hand
over. Supporting hand over requires an accurate synchronization of the
radio signals in the air. You use radio signals, rather than over the wired
network, to perform the synchronization.
ATTENTION
DAPs must be able to receive synchronization signals from at least one other
DAP. If not, the DAP operates in single cell mode and hand over to other DAPs
is not possible.
Figure 5 "DAP radio signal synchronization" (page 28) shows two circles
around the DAP.
• an inner circle in which there is sufficient radio signal strength for
acceptable voice quality
• an outer circle in which there is sufficient signal strength for
synchronization, but not enough for acceptable voice quality
Nortel Communication Server 1000
SIP DECT Fundamentals
NN43120-123 01.07
6 January 2009
Copyright © 2008-2009 Nortel Networks
.
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