Seminar on
BLUETOOTH
Presented By:
Abinash Ojha
Reg. No.-0501206108
Branch-ENTC
Ajay-Binay Institute Of Technology,CTC
CONTENTS
Introduction
What is Bluetooth?
Origin of the name
Technology Of Bluetooth
Network Arrangement
How it Works?
Connection Protocol
Connection Control
Data Transmission
Packets
Transmission types and rates
Power Class
Control of link Connection
Hardwire Architecture
Radio Frequency
Baseband
Error Correction and Security
Future of Bluetooth
Conclusion
Introduction
Bluetooth is a revolutionary device
launched by two L.M. Ericsson
Telephone Employees the Swedish born
Sven Mattisson and his Dutch colleague,
Jaap Haartsengy in 1994.
Origin of the name Bluetooth
The name “Bluetooth” comes from
a tenth century Danish king,
“Harald Bluetooth Blatand”
What is Bluetooth?
Bluetooth is a low cost, world wide wireless
transferring technology that enables short-range wireless
connections between desktop and laptop computers,
personal digital assistants (PDAs), cellular phones,
printers, scanners, digital cameras, keyboard, mouse and
even home appliances. It delivers opportunities for rapid
ad-hoc connections.
The Bluetooth wireless technology comprises
hardware, software and interoperability requirements.
Bluetooth is actually a standard for wireless
communications between devices in a Personal Area
network (PAN) using radio frequency. Since Bluetooth
utilizes a radio-based link, even if the devices are not in
line of sight they can communicate with each other.
How Bluetooth Work?
Does not require line-of-sight positioning of connected units.
Uses modifications of existing wireless LAN techniques
The circuits are contained on a circuit board 0.9cm square.
They can then establish a 1 megabit/s link.
The protocols will handle both voice and data.
It uses tiny, inexpensive, short-range transceivers
Operates on the radio band 2.4 GHz
Bluetooth modules in a PC can be built in as a PC card or
externally attached via the USB port.
The maximum range is 10 meters .
Protected from radio interference by frequency hopping.
Bluetooth radio typically hops faster and uses shorter packets.
A master unit can communicate with up to seven slave units.
Each device has 48-bit address
Connection Protocol
Bluetooth connections are established via
the following techniques:
Standby
Page/Inquiry
Active
Hold
Sniff
Park
Connection Control
Data transmission
Data can be transmitted both
synchronously and asynchronously
The Synchronous Connection
Oriented(SCO) method is used
primarily for voice.
The Asynchronous Connection Less
(ACL) is primarily for data.
Transmission types and Rates
The baseband (single channel per line)
protocol combines circuit and packet
switching.
Circuit switching can be either
asynchronous or synchronous .
Each synchronous channel can support a
64 Kb/s transfer rate
An asynchronous channel can transmit
as much as 721 Kb/s in one direction
and 57.6 Kb/s in the opposite direction.
Packets
Each packet has 72-bits access code, 54-bits
header and payload of variable size.
Power Class
Power Class Power Range
1 100 mW 100m
2 2.5 mW 20m
3 1 mW 10m
Control of link connections
Controller
•Sending and receiving data.
•Paging and inquiries.
•Setting up connections.
•Authentication.
•Determining SCO or ACL.
•Determining the frame type of each packet.
Future for Bluetooth
The report from In-Stat Group says
shipments of Bluetooth chips have
surpassed 50 million in 2002.By 2009
In-Stat expects more than 670 million
Bluetooth chipsets to be shipped.
Conclusion
It has to go for some improvement. Because,
as we have discussed the range is very small.
Data rate is only 1 mbps. So these have to go for
improvement. It has to accommodate real-time
video.
Reference
s
www.bluetooth.org
www.howstuffworks.com
www.google.com
www.palowireless.com
