Bluetooth

Ville Jounio

Dap02s

• Intoduction to Bluetooth

• Brief history

• How does it work?

• Other wireless methods

• Bluetooth devices today

• Future of Bluetooth

Definition

”wireless short-range communications of data and voice between both mobile and stationary devices.”

www.symbian.com

• Mobile phones

• Computers

• MP3 Players

• PDAs

Some devices with Bluetooth

Where does the name come from?

• The 10th century Danish King Harald Blatand

• United tribes in Denmark, Norway and Sweden

Logo

• Designed by a Scandinavian company

• Combination of runic characters H and B

Timeline

Timeline

Timeline

Timeline

Timeline

Timeline

SIG

• SIG = Special Interest Group• Global headquarter in Overland Park

(Arkansas, USA)• Driving the development of Bluetooth• Promoter members -Board of Directors, Bluetooth Qualification Review Board

• Associate members• Adopter members

How Bluetooth works?

• Frequency 2.4 gHz (ISM)

• Sends out weak signals (1milliwatt)

• Range 10m

• 721 Kbp/s

• Half-duplex

• Full-duplex

Interference

• What about interference when using many devices in the same area?

• Spread-spectrum frequency hopping

• 1600 times a second

Bluetooth networks

• Personal-area network (PAN, piconet)

• Devices in the net use frequency hopping the same way

• Master, slave

• Up to 8 devices in one piconet

• Several piconets form scatternet

Piconet

Scatternet

Why use Bluetooth?

• Cheap solution

• Less cables (wireless)

• Automatic (no setup)

• Can be applied to almost anywhere

• Trendy

Other wireless methods

• Infrared

• UWB (Ultra Wideband)

• ERF (Embedded Wireless Platform)

Infrared

• Information transfer via light

• Must have a line of sight

• Used in remote controllers etc.

• Cannot send data to multiple devices at the same time

• Reliable and low cost

UWB

• UWB 480 Mbps

• No single specification

• Highest speed only within 1m

ERF

• Developed by a finnish company

• Highly configurable

• Range 10-20m

• 256 kbps (theoretical max of the net)

• Low cost

• Low power consumption (2 AA batteries, can work upto 2-3 years)

Espotel

Marketing

• Bluetooth is sexy!• Implemented in trendy and fancy

products • Most visible products MP3 players, cell

phones and gaming devices• Used everywhere – at home, work,

hobbies etc.• ”Best thing ever happened to you”

Products using Bluetooth

• Zodiac

• Diva Gem GB4000

• Nokia N-Gage

• Nokia Image Viewer

• Crabat Mobile Media Viewer

Diva Gem GB4000

• MP3 Player, radio and recorder

• Bluetooth

• Incoming calls

• Dialling using voice commands

Daisy Multimedia

Bluetooth goodies• wrist watch

• t-shirts

• caps

• bags

• cups

Bluetooth 2.0 + EDR• Specification launched November 2004

• EDR (Enhanced Data Rate)

• Faster file transfer

• 2.1 Mbps

• Longer battery life

• Backwards compatible

Future• Bluetooth 2.0 devices on market early

2005

• 150 million devices in the end of 2004

• 470 million devices in the end of 2006

• 2005 concentrated on security issues and power consumption

• 2006 multi-cast, improved range (100m)

Thank you for listening!

Now it’s opponent’s turn!