Bluetooth Architecture & Layers of Bluetooth Video Lecture - Computer Science Engineering (CSE)

aspects Bluetooth Network there are two
types of Bluetooth Network Pico nets
scatter nets Pico Nets the first type of
Bluetooth network is called as a pic net
or a small net
can have it the most eight stations one
of them is called as a master and all
others are called as slaves all the
slave stations are synchronized in all
aspects with the master a pic net can
have only one master station shows pic
Annette a master can also be called as a
primary station and slaves are the
secondary station pic Annette
architecture Bluetooth architecture the
communication between a master and
slaves can be one-to-one or one-to-many
note that the communication takes place
between the master and slaves but no
direct note the communication takes
place between the master and slaves but
no direct communication takes place
between slaves the formation of a pic
Annette is governed by two factors
address of each Bluetooth device clock
associated with each device every device
in a pic Annette has been assigned with
a 48-bit address which is similar to an
Ethernet address the address field is
divided into three parts in the lower
address part lap is used for the purpose
of pic Annette identification error
checking and security checks every
device has a 28 bit clock which is
called as a native clock its frequency
is 3,200 pulses per second ie once and
3.12 us because this is exactly twice
the normal hopping rate of 1600 hops /
second a pic Annette can have up to
seven active slaves at any given instant
of time in order to identify a slave
each one is assigned a locally unique
active member address M address if a
Bluetooth device is not associated with
any pic annette then it is said to be in
standby mode scatter nets many Pico nets
may exist simultaneously in a given area
and they may even overlap each other a
scatter net is obtained by combining
Pico nets as shown in fig the fig shows
a scatter net consisting two pico nets a
slave in the first pic annette can act
as a master in the second pic annette it
will receive the messages from the
master in the first pic annette by
acting as a slave and then delivers the
message to the slaves in the second
Anette as shown in the figure so the
number of Pico nets the possibility of
collisions increases this will result in
degradation of performance therefore a
device can participate in two or more
Pico nets by means of the time sharing
the process to do so it must use the
Associated masters address and proper
clock offset a Bluetooth architecture
device can act as a scat turnitin that
the utilization of bandwidth is not
optimal
this happens because a device changes
its role and takes part in different
pico nets another important issue is the
timing that a device would be missing
when it participates in more than one
Pico nets if a master of one pick a net
temporarily becomes a slave in some
other pick a net then it will be missing
from its own pic net for that much time
this reduces the quality of the
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