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14
2.3
MASTER/SLAVE ROLE SELECTION
The device role is automatically assigned. When a device is under the
“undefined”
state, it starts the role selection algorithm:
1. A
random
wait time
is calculated, greater enough than the master notification
sending time.
2. The device remains waiting during the above time.
a. If nothing is received, it adopts the
master role
and starts sending the
master notification object.
b. If before the end of the time count any value is received through the
master notification object, the device adopts the
slave role
and starts
sending the slave notification object.
Figure 5
Role selection.
Device 1
Device 2
t
t
Download
t
selection
t
selection
Download
