Expert Documentation

Chapter 5
AVAILABLE FEATURES
Mobility management
- roaming
- intracell handoff (on the same base station)
- intercell handoff (between base stations).
System access and dynamic channel selection
Before making or receiving calls, the handset must obtain information about the environment in
which it is being used to ensure that it does in fact have access to the system.
To enable the handset to synchronize itself with the system, each base station is always active
on at least one radio channel (the dummy bearer), broadcasting information concerning the
system and its identity.
Any handset will thus be able to recognize the system coverage area in which it is working.
When on standby, each handset is tuned to the nearest base station, receptive to search
messages indicating an incoming call.
Channels are assigned dynamically when requested by the handset. Once synchronized with
the system, the handset decides on the most appropriate channel for a call. It chooses the
least disrupted of the free channels.
Inter- and intra-cell handoff procedures
5-2