2. WHAT IS BLUETOOTH ?
• Bluetooth is a different kind of wireless technology standard for
transmitting fixed and mobile electronic device data over short
distances. Bluetooth was introduced in 1994 as a wireless
substitute for RS-232 cables.
• It is sometimes referred to as personal area network(PAN)
operating within the unlicensed 2.4 GHz band.
4. WHY THE NAME “BLUETOOTH ?
• The name “Bluetooth” is taken from Viking king Harald Blaatand
• Jim Kardach, an engineer who was working at Intel during the
mid-1990s was tasked with bringing together several tech
companies from the PC and cellular industries, Intel, Ericsson
• Jim's mission was to try and mediate an industry-wide standard
for short-range wireless connectivity. These tech leaders would
go on to form the Bluetooth SIG (Special Interest Group).
5. WHY THE NAME “BLUETOOTH ?
• During this period, Jim was reading a book about Vikings (The
Vikings by Gwyn Jones) which featured tales of King Harald
Bluetooth. King Harald was known for bringing together
Denmark and Norway, and Jim thought this reflected his efforts
in trying to unite these tech companies in a common purpose.
• In fact, the Bluetooth logo is actually a combination of the
initials H and B (Harald Bluetooth) written in ancient Viking
6. BLUETOOTH TECHNOLOGY
• Bluetooth technology uses radio waves for
communication purpose in its wireless network.
• The effective range between Bluetooth devices is 10
• The IEEE based its wireless personal area network 802.15
• Bluetooth supports wireless point-to-point and point-to-
multiple devices in Pico net.
7. BLUETOOTH TECHNOLOGY
• Point-to-point link has a master and slave relation and
Bluetooth function is also same like a master and slave; the
figure below shows the master and slave relation.
• Point-to-multiple point links functions like a master-to-one
or more slaves. But, the maximum number of slaves is 7.
9. HOW BLUETOOTH WORK ?
• Here, the data/audio is continuously transferred from a paired
Bluetooth transmitter to a paired receiver.
• Pairing is just the bonding procedure between devices so that
you don't have to enter passwords or passkeys, each time the
devices need to establish a connection.
• Once a secure connection is established between a
transmitter and receiver, data is split into small packets, which
are then transferred at alternating frequencies.
10. HOW BLUETOOTH WORK ?
• Slave devices are required to synchronize their
transmit/receive timing with that of the masters.
• The frequency hopping sequence is defined by the Bluetooth
device address (BD_ADDR) of the master device. The master
device first sends a radio signal asking for a response from
the particular slave devices within the range of addresses.
• The slaves respond and synchronize their hop frequency as
well as the clock with that of the master device.
15. POWER CLASSES OF BLUETOOTH
• Bluetooth technology is not limited to short-range
• It is offering three ranges of standard range connectivity.
• No line of site restrictions.
• Low power consumption makes integrated in battery
powered devices very practical.
• 2.54 GHz radio frequency ensures worldwide operability.
• Tremendous momentum not only within computer industry
but other industries like cellular telephones and
17. BLUETOOTH APPLICATIONS
• The transfer of files like images, mp3 audio is very easy
in the mobile phones.
• A little amount of bandwidth is needed for the wireless
networking between the laptops and desktop
• All the peripheral devices like mouse, keyboard,
printers, speakers, etc. are connected to the PC