Bluetooth Technoloty

1. Bluetooth
Zahra Sadeghi

2. Name
The system is named after a Danish
king Harald Blåtand (Harold Bluetooth in
English), King of Denmark and Norway
from 935 and 936 respectively, to 940
known for his unification of previously
warring tribes from Denmark, Norway and
Sweden. Bluetooth likewise was intended
to unify different technologies like
computers and mobile phones.

3. Special Interest Group(SIG)
Ericsson
IBM
Intel
Nokia
Toshiba
1. connectionless short distance radio
device.
2. A defacto standard

4. Schedule
In the beginning of 1997: Ericsson starts
recognising the interest for a wireless solution
among other companies.
February 1998: The five original companies
formed the beginning of the SIG-group.
May 20 1998: The Bluetooth consortium
announced itself to the public. Other companies
start joining the SIG.
October 1998: The 0.8 version of the
specification is announced in the first Bluetooth
Conference.

5. December 1998: Over 150 companies have
joined the SIG.
Beginning of March 1999: Over 200 companies
in the SIG.
End of June 1999: Version 1.0 of the Bluetooth
specification should be ready.
August 1999: The first series of functional
products arrives the market.
January 2000: Large manufacturing of devices.
Prices should go down.

6. introduction
It is a wireless radio standard primarily
designed for low power consumption, with
a short range (from 10 up to 100 meters)
and with a low-cost transceiver microchip
in each device.
Bluetooth provides a way to connect and
exchange information between devices like
personal digital assistants (PDAs), mobile
phones, laptops, PCs, printers and digital
cameras via a secure, low-cost, globally
available short range radio frequency.

7. lower in cost than alternative wireless standards
and will also often allow a lower cost replacement
for cables and connectors, particularly when
accounting for installation and maintenance .

8. Practical examples
robotics,
within the home,
ease the use of digital cameras and MP3s,
be used in vending machines,
act as a headset that communicates with a
mobile phone in your pocket,
within audio speakers,
a refrigerator automatically ordering over
the internet the weeks shopping.
Send photos and video clips instantly from
any location

9. Conversation of devices
Wires
1. Serial connection:1 1 bit at a time
2. Parrallel connection:8 to 16 bits at a time
Wireless
1. IrDa(Infrared Data Association)
2. Radio waves

10. Infrared data association
Light travels in straight line (not for radio
waves)
Transceiver and receiver must be in front
of each other (not for radio waves)
Point-to-point connection (not for radio
waves)

11. Data transferring speed
► Synchronous transferring(423 Kbps)
up to 3 simultaneous synchronous voice
channels,
or a channel, which simultaneously supports
asynchronous data and synchronous voice.
► Asynchronous transferring(721 Kbps)
The asynchronous channel can support an
asymmetric link of maximally 721 kb/s in
either direction.

12. Bluetooth specifications
Frequency range:
at 2.4 -2.48 GHz (industrial scientific
medical =ISM band)
In order to avoid interfering with other
protocols which use the 2.45 GHz band,
the Bluetooth protocol divides the band
into 79 channels and changes channels
up to 1600 times per second.

13. Network topology
bluetooth units can create both point-to-
point and point-to-multi-point connections.
Every Bluetooth device can simultaneously
maintain up to 7 connections, but only one
active connection at the time.
A connection with two or several, maximum
eight, units is called a piconet.
These groups (maximum of 8 devices: 1
host and 7 slaves) are called piconets

14. Master and slave
one device in a Bluetooth piconet is the
master (controller) and other devices are
slaves to the master.

15. packet
Each packet begins with a 72-bit access
code that is derived from the master
identity and is unique for the channel.

16. Wireless Fidelity(Wi-Fi)
While Bluetooth is a cable replacement
creating personal area networking(PAN)
between different devices, Wi-Fi is a
cable replacement for local area network
(LAN) access.
Models:
1. IEEE 802.11a (11 Mbps,2.4 GHz)
2. IEEE 802.11b (54 Mbps,5 GHz)
► Access point stations(150 m: 1 Mbps)

17. security
Authentication
encryption

18. HomeRF
established in the same way as Bluetooth with
core members as: Microsoft, Motorola, Intel,
IBM, Ericsson etc.
Supported units in a network: HomeRF allows
up to 127 units. Bluetooth only 8 in their piconet.
Data security: HomeRF use Blowfish encryption,
which makes it more secure than Bluetooth.
Power consumption: HomeRF needs more
current than Bluetooth, it also does not have
several modes for power saving.

19. HomePNA (Home Phoneline Networking
Alliance )
The (HomePNA) is an association of
companies working for a single, unified
phone line networking standard and home
networking solutions.
The core members are 3Com, AMD,
Compaq, and again Intel and IBM and some
other companies.
The goal for HomePNA is to establish a
standard for home networking through
phone lines.

20. Bluetooth Top Sites
(http://www.topsitelists.com/bestsites/bluetooth/
Bluetooth and IEEE 802.15
(http://www.networkdictionary.com/protocols/80215
.php)
Bluetooth SIG public pages
(http://www.bluetooth.com/)
Bluetooth Membership
site(http://www.bluetooth.org/)
Howstuffworks.com explanation of bluetooth
(http://www.howstuffworks.com/bluetooth.htm)
The Bluetooth Car Concept
(http://develop.consumerium.org/wiki/index.php/Us
er:Juxho/Bluetooth_Car)

21. Personal Telco Wiki
(http://www.personaltelco.net/index.cgi/BlueTooth)
(this article may not be completely accurate
technically)
A series of guides
(http://www.geekzone.co.nz/content.asp?contentid
=449) on how-to connect devices like mobile
phones, PDAs, desktop/laptops, headsets and use
different Bluetooth services
Mapping Salutation Architecture APIs to Bluetooth
Service Discovery Layer
(http://citeseer.nj.nec.com/context/1174778/0)
Bluetooth News and Discussion Group
(http://groups.yahoo.com/group/blueinfo/)

22. Bluetooth Jobs
(http://groups.yahoo.com/group/bluejobs/)
Bluetooth™ Security White Paper
(http://www.bluetooth.comhttp://en.wikipedia.org/upl
oad/24Security_Paper.PDF)
Security Concerns
(http://www.atstake.com/research/reports/acrobat/at
stake_war_nibbling.pdf)
Laptops, PDA and mobile (cell) phones with
Bluetooth(TM) and Linux
(http://tuxmobil.org/bluetooth_linux.html)

23. Bluetooth qualified products
(http://qualweb.bluetooth.org/Template2.cfm?Link
Qualified=QualifiedProducts)
Bluecarkit discussion forum about Bluetooth car
handsfree (http://www.bluecarkit.com/forum)