This Presentation is prepared by the higher authority of polite group under the supervision of Syed Mubashair Abid and other members are Ch.Junaid Arshad and Muhammad Aftab Mustafa

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Bluetooth in wireless
Communication

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Group#4
Group Members
Polite Group
M.Aftab
Mustafa
Junaid Arshad
Syed Mubashir
Abid

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Polite Group
Contents
Overview1
Why Bluetooth2
Features3
Classes of bluetooth4

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Polite Group
Contents
Bluetooth topology1
Security of Bluetooth2
Bluetooth Protocol stack3
Application/Advantages/Disadvantages4

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Polite Group
Over View
Introduction
Bluetooth is short range
wireless communication
technology
Bluetooth SIG.
Over View
.
History
The Bluetooth name came
from Danish king Harald
Blatand
This technology was born in
1994
First version was release in
1999

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LOGOIntroduction
Bluetooth is a short range low power
wireless technology standard for
exchanging data over short distances.
 Bluetooth is a wireless technology for
creating personal networks operating in the
2.4 GHz unlicensed band, with a range of 10
meters
 Networks are usually formed ad-hoc from
portable devices such as cellular phones,
handhelds and laptops.
Polite Group

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LOGOWhy Bluetooth
 Cable replacement between devices
 Supported by major companies
 Open specification
 Capable handling of both voice and data
simultaneously
 Low power consumption and Slow
transmission rate
 Connection can be initiated without user
interaction
 Devices can be connected to a multiple
devices at the same time
Polite Group

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Technical Features
Connection Type Spread Spectrum and
time division duplex
Frequency Band 2.4GHz
Data rate per channel 1 to 3 Mb/sec
Network Topology Star
Transmission Power 1mw-100mw
Range 30ft
Supporting Station 8 devices
Data security-
Authentication Key
128 bit key
Data security-Encryption
key
8-128bits
Module size 9x9 mm

9. COMPANY
LOGO
Polite Group
Features of Bluetooth
 Broadcast channel
Enable Bluetooth information points that will drive the adoption of
Bluetooth into the cell phones and enable advertising model based around
user pulling information
 Topology management
Enable automatic configuration of points
Automatic configuration of Bluetooth topology
 Alternative MAC PHY
For transporting Bluetooth profile data
For sending lots of data at high speed
 QOS Improvement
Transmission at higher quality
Enable the use of alternative MAC and PHY’s for transporting Bluetooth
profile data

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LOGOClasses of Bluetooth
Bluetooth devices are classified in
three different power classes as
shown in the following table
Polite Group
Class Maximum
parameter power
(mW)
Range
(approximately)
Class1 100mW 100 meter
Class2 2.5mW 10 meter
Class3 1mW 1 meter

11. COMPANY
LOGOApplication Areas
Data and Voice Access points
Real time voice and data transmission
 Cable Replacement
Eliminates need for numerous cable
attachment for connection
 Ad-Hoc Networking
Device with Bluetooth radio can
establishment connection with another when in
range
Polite Group

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LOGO
Polite Group
Bluetooth Topology
Piconets
 A set of Bluetooth devices sharing a common channel is called a
piconets.
Scatternets
 Scatternets are two or more independent and non-synchronized
piconets that communicate with each other by making bridge
node

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LOGO
Polite Group
Bluetooth security
Safer Transmission of data in Bluetooth 2.0 and late version
1. Bluejacking
Bluejacking is the sending of unsolicited messages over Bluetooth to
Bluetooth-enabled devices such as mobile phones
2. Bluesnarffing
Bluesnarfing is the unauthorized access of information from a wireless
device through a Bluetooth connection, often between
phones, desktops, laptops, and PDAs. This allows access to a
calendar, contact list, emails and text messages, and on some phones
users can copy pictures and private video
Bluetooth error correction scheme
1. FEC(forward error correction)
The sender encodes the data using an error-correcting code (ECC) prior to
transmission.
2. ARQ unnumbered scheme(Automatic repeat request)
• Blocks of data are verified using the error detection code
• Receiver requests for retransmission of erroneous data.

14. COMPANY
LOGOFHSS
 Frequency-hopping spread spectrum (FHSS) is a method of transmitting
radio signals by rapidly switching a carrier among many frequency channels,
using a pseudorandom sequence known to both transmitter and receiver. It
is utilized as a multiple access method in the frequency-hopping code
division multiple access (FH-CDMA) scheme
 Bluetooth devices use a protocol called (FHHS) Frequency-Hopping
Spread Spectrum .
 Uses packet-switching to send data.
 Bluetooth sends packets of data on a range of frequencies.
 In each session one device is a master and the others are slaves.
 The master device tells the slaves at what frequency data will be
sent.
 This technique allows devices to communicate with each other more
securely.
Polite Group

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LOGOBluetooth Protocol Stack
Polite Group

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LOGOBluetooth Protocol Stack
 RF Layer
The Radio (layer) is the lowest defined layer of the Bluetooth
specification.
It defines the requirements of the Bluetooth transceiver device operating
in the 2.4GHz ISM band
It uses a packet switching protocol
 Baseband layer
This layer defines the timing, framing, packets and flow control on the
link.
 Link Manager
Responsible for managing connection states(authentication & encryption),
enforcing fairness among slaves & power management
 Logical Link Layer
Handles multiplexing, segmentation and reassembly of large packets and
device discovery.
Polite Group

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LOGOBluetooth Protocol Stack
 Logical link control and adaptation protocol
L2CAP is used within the Bluetooth protocol stack. It passes packets to
either the Host Controller Interface (HCI) or on a hostelss system, directly
to the Link Manager/ACL link.
L2CAP's functions include:
 Multiplexing data between different higher layer protocols.
 Segmentation and reassembly of packets.
 Providing one-way transmission management of multicast data to a group
of other Bluetooth devices.
 Quality of service (QoS) management for higher layer protocols
 Service discovery protocol (SDP)
Used to allow devices to discover what services each other support, and
what parameters to use to connect to them
 Telephony Control Protocol Specification
TCS defines the call control signaling that is used by Bluetooth devices
for the establishment of speech and data calls
Polite Group

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Polite Group
Diagram
DisadvantagesAdvantages
Health concernApplications
Bluetooth

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LOGOAdvantages
 Eliminates wire
 Facilitate data and voice communication
 Offer formation of Ad-Hoc network
 Standardized Protocols
 Free of charge
 Easy to use
 Low power consume battery less
 Bluetooth technology is inexpensive
Polite Group

20. COMPANY
LOGODisadvantages
Relatively short range
Less secure
Interference with other devices
Medicore data rates
Bluetooth internet connection gets
slow sometimes
Polite Group

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LOGOHealth Concern
 The carrier wave use by Bluetooth transmitter is the same
frequency range of microwave oven
 The transmitting power is far to weak to be noticeable for humans
 The radiation output power is Bluetooth devices is low so it is
assumed that the potential for health risk are lower
Polite Group

22. COMPANY
LOGOApplication
Polite Group

23. COMPANY
LOGORefrences
 http://www.slideshare.net/guest664c3f/bluetooth-presentation-
2562337#btnNext
 http://en.wikipedia.org/wiki/Bluetooth
 Stalling,W(2007) Wireless Communication and Network 2nd
Edition PP 463-509
Polite Group

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