User's Manual

SME VoIP System Guide, Version 1.5
Proprietary and Confidential
Chapter: SME VoIP Network Planning/Optimization
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4.3.3 Handover Mechanics/Planning
Handsets should seamlessly move between coverage areas. In other words, handset should be able to
move in a multi-cell setup of base stations and/or repeaters from one base station to another without
terminating or causing hindrance while receiving continuous service and maintaining call-sessions in
progress.
For efficient handover of conversations between Base stations in multi-cell setup, deploy Base stations with
wide overlap between them (i.e., plan for some areas to be covered by more than one Base station).
Overlaps are necessary to maintain seamless handover and to establish synchronization chains. A good
example may be a cafeteria during lunch hour where temporary concentrations of handsets may occur. The
overlap carries the excess call load to adjacent Base stations to provide uninterrupted services to
subscribers.
4.4 Cell Coverage / Capacity Planning
4.4.1 Cell Coverage
Due to the unexpected nature of RF propagation in an indoor environment, an actual on-site test must be
performed before the deploying and/or installing core network elements. An extensive guide to effective
RF coverage planning is outside the scope of this document. This should be noted:
The Base stations provides typical RF coverage of up to 50 meters/164 feet in a typical indoor office
environment and up 300 meters/984 feet in an open area (line-of-sight-LOS), extending in all directions
from the Base stations (i.e. Omni directional). The exact coverage range depends on the building
architecture, wall material and surroundings. The figure below show the correct installation of base stations
spaced at the recommended distances from each other: