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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
Bluetooth in wireless Communication
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Group#4Group 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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Contents
Bluetooth topology1
Security of Bluetooth2
Bluetooth Protocol stack3
Application/Advantages/Disadvantages4
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Over View
IntroductionBluetooth is short range
wireless communication technology
Bluetooth SIG.
Over View
.HistoryThe Bluetooth name came
from Danish king Harald Blatand
This technology was born in 1994
First version was release in 1999
COMPANYLOGOIntroduction
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.
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COMPANYLOGOWhy 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
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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
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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
COMPANYLOGOClasses of Bluetooth
Bluetooth devices are classified in three different power classes as shown in the following table
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Class Maximum parameter power (mW)
Range(approximately)
Class1 100mW 100 meter
Class2 2.5mW 10 meter
Class3 1mW 1 meter
COMPANYLOGOApplication 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
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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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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 scheme1. 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.
COMPANYLOGOFHSS
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.
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COMPANYLOGOBluetooth Protocol Stack
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COMPANYLOGOBluetooth 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.
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COMPANYLOGOBluetooth 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
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Diagram
DisadvantagesAdvantages
Health concernApplications
Bluetooth
COMPANYLOGOAdvantages
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
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COMPANYLOGODisadvantages
Relatively short range
Less secure
Interference with other devices
Medicore data rates
Bluetooth internet connection gets slow sometimes
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COMPANYLOGOHealth 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
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COMPANYLOGOApplication
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COMPANYLOGORefrences
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
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