C
ORDLESS
P
HONE
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5/1531-ANF 901 14 Uen D3 2013-11-28
Figure 16:System with three on-going traffic.
5.2
Continuous Base Station Broadcast (Dummy
Bearer)
A base station continuously transmits one or two, depending on imple-
mentation, so called dummy bearer when idle (i.e. when no calls or data
are transmitted to or from the base station). The reason for continuously
transmitting the dummy bearer is due to that the portable device listens
to one dummy bearer and uses the information to lock-on to the system;
synchronize, check base station identity, system capabilities, status and
paging information for incoming voice and data call set-ups as well as for
preparing hand over, call setups etc.
This means that a base station is always transmitting information regard-
less of which type, residential or multiple base station system. Note: The
dummy bearer is only transmitted in the base station to portable device
direction.
