Origin of the Bluetooth name
Symbol of Bluetooth
Bluetooth Protocol Stack
How Bluetooth works?
Advantages and disadvantages of
• Wireless technology
• Used to transfer data between different
• Distance of data transmission - Small
(Compare to other modes of wireless
• Eradicates - Wires, Cables,
• 1994 – Ericsson
Telecommunication (main idea).
• Objective – eliminate the
cables between the mobile
telephones and the desktop
devices, headset, etc..,
• In February, 1998 – (Ericsson,
Nokia , IBM , Toshiba and Intel)
- SPECIAL INTEREST GROUP.
• Now , Bluetooth is managed by
the Bluetooth Special Interest
Group.( more than 19,000
companies) in the areas of
computing , networking and
SPECIAL INTEREST GROUP
• From an article EE Times: Jim Kardach , an Intel Engineer.
• The name was taken from the 10th century, Second king of
Denmark, “King Harald Bluetooth” who was famous for
uniting Scandinavia (just as them, to unite the PC and
cellular Industries with a short range of wireless link).
• By February 1997, SIG formed developing the official name.
• The top two names were “Radiowire” and “PAN”.
• In April, SIG board meeting voted for “PAN”.
• A search showed that the name was already in use.
• As launch date neared, running out of time , the SIG team had no
other alternative than to adopt “Bluetooth” as the official name.
• Harald (transcribed by H) and Bluetooth
(transcribed by B)
Host Controller Interface (HCI)
Bluetooth Core Protocol
Cable Replacement Protocol
Bluetooth Radio : specifics details of the air interface,
including frequency, frequency hopping, modulation
scheme, and transmission power.
Baseband: concerned with connection establishment
within a piconet, addressing, packet format, timing and
Link manager protocol (LMP): establishes the link setup
between Bluetooth devices and manages ongoing links,
including security aspects (e.g. authentication and
encryption), and control and negotiation of baseband
packet size .
Logical link control and adaptation protocol (L2CAP): adapts
upper layer protocols to the baseband layer. Provides both
connectionless and connection-oriented services.
Service discovery protocol (SDP): handles device information,
services, and queries for service characteristics between two
or more Bluetooth devices.
Host Controller Interface (HCI): provides an interface
method for accessing the Bluetooth hardware capabilities. It
contains a command interface, which acts between the
Baseband controller and link manager .
TCS BIN (Telephony Control Service): bit-oriented protocol
that defines the call control signaling for the establishment
of voice and data calls between Bluetooth devices.
OBEX(OBject EXchange) : Session-layer protocol for the
exchange of objects, providing a model for object and
RFCOMM: a reliable transport protocol, which provides
emulation of RS232 serial ports over the L2CAP protocol
WAE/WAP: Bluetooth incorporates the wireless application
environment and the wireless application protocol into its
• ISM band ranges between 2.400 GHZ to 2.483
•BWT enabled devices uses a technique called
FREQUENCY HOPPING .
• Data is divided into small pieces called Packets.
•Transmitter and receiver exchange a data packet at one
frequency to exchange, and then they hop to another
frequency to exchange another packet.
•They repeat this process until all the data is transmitted.
BWT devices randomly hop between frequencies up to 1600
times per second, much faster than other types of
devices that use the ISM band.
•BWT enabled devices form network topologies called
Piconets and Scatternets.
- consists of up to eight BWT enabled devices.
- when a piconet is established, one device (primary
device/ master) sets the frequency – hopping
pattern and the other device (secondary device /
slave) synchronize their signals to the same
- in which two or more piconets connected by a
Bluetooth devices are wireless.
Bluetooth technology is inexpensive.
Bluetooth is Automatic.
Low energy consumption.
Share voice and data.
Bluetooth devices can not be
connected with more than one device
at a time, as it finds problem in
discovering the intended device.
Bluetooth has a low data rate
(i.e 1 MB ps) in comparison to infra-
red (i.e 4 MB ps).
Simple Choice for Convenient, wire-free,
short range communication between devices.
Bluetooth enabled products do not need to
install driver software.
Latest- This technology is now available in
Fourth version – low power, low cost, built –
in-security, robustness , ease of use and
ad-hoc networking abilities.
Shipping over 5 million units every week.
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