6139331 Bluetooth Technologies

7/29/2019 6139331 Bluetooth Technologies

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AN INTRODUCTION TO BLUETOOTH

TECHNOLOGY

Presented by - Thomas Samuel



CONTENT

Overview of Bluetooth History

The Bluetooth Specifications

Typical Bluetooth Scenario

Working of Bluetooth System Requirements

Profiles

Comparison with other technologies Advantages & Disadvantages of

Bluetooth



EXAMPLE : THE NETWORKED HOME



WHAT IS BLUETOOTH?

“Bluetooth wireless technology is an open specification

for a low-cost, low-power, short-range radio technology

for ad-hoc wireless communication of voice and data

anywhere in the world.”

One of the first modules (Ericsson) A recent module



ULTIMATE HEADSET



CORDLESS COMPUTER



BLUETOOTH GOALS & VISION

Originally conceived as a cable replacementtechnology

Short-Range Wireless Solutions

Open Specification

Voice and Data Capability

Worldwide Usability

Other usage models began to develop:

Personal Area Network (PAN)

Ad-hoc networks

Data/voice access points

Wireless telematics



OVERVIEW OF BLUETOOTH HISTORY

What is Bluetooth? Bluetooth is a short-range wireless communications

technology.

Why this name?

It was taken from the 10th century Danish King Harald Blatandwho unified Denmark and Norway.

When does it appear?

1994 – Ericsson study on a wireless technology to link mobile

phones & accessories. 5 companies joined to form the Bluetooth Special Interest

Group (SIG) in 1998.

First specification released in July 1999.



TIMELINE

1994 : Ericsson study complete / vision

1995 : Engineering work begins

1997 : Intel agrees to collaborate

1998 : Bluetooth SIG formed: Ericsson, Intel, IBM, Nokia &Toshiba

1999 : Bluetooth Specification 1.0A SIG promoter groupExpanded: 3Com, Lucent, Microsoft & Motorola.

2000 : Bluetooth Specification 1.0B, 2000+ adopters

2001 : First retail products released, Specification 1.1

2003 : Bluetooth Specification 1.2

2005 : Bluetooth Specification 2.0 (?)



Piconet is the fundamental form of communication for Bluetooth Wireless

technology.

Master & Slaves.The master Bluetooth device can

communicate with upto 7 devices.

Data can be transferred b/w the master &one other device.

The master switches rapidly from device to

another in a round-robin fashion.



M-master

S-Slave

P-ParkedSB-Standby

M M

S

SS

S

P

P

P

P

S

SB

All devices in a piconet use the same frequency-

hopping pattern

Piconet 1 Piconet 2



Two or more Piconets can be

connected together to form a

Scatternet.

Some devices act as a bridge bysimultaneously playing the master role

& the slave role in one piconet.

All devices in a piconet use the samefrequency-hopping pattern



HCI



Bluetooth specification consists of aseries of layers, implemented in h/w& s/w:

Physical layer

Baseband

Link Manager Protocol(LMP)

Host controller

Logical Link Control and AdaptationProtocol (L2CAP).

Application Protocol



A PC must have a bluetooth adapter to

communicate with bluetooth devices

Some contain an internal bluetooth adapter But most require an external USB bluetooth

Dongle.

Unlike IrDA, multiple Bluetooth devices cancommunicate with a computer over a single

dongle.



The only versions of MS Windows tat havenative support for BT are Windows XPService Pack 2 and later

Previous versions require the users to installtheir BT adapter’s own drivers (not directlysupported by MS)

Mac OS X has supported BT since version

10.2 released in 2002.Linux provides 2 BT stacks with BlueZ stack,

Supporting all core BT protocols & layers



LIST OF APPLICATIONS

Wireless control of communication b/w acell phone & a hands-free headset

Wireless n/wing b/w PCs in a confined

spaceTransfer of files b/w devices with OBEX

For controls where IR was traditionally used

7th generation game consoles-Nintendo Wii,Sony PlayStation3



Bluetooth 1.0 and 1.0BDrawbacks:Difficulty in making it interoperable

Had mandatory h/w device addtransmission

Rendering anonymity impossible at

protocol level



BLUETOOTH 1.1Many errors found in 1.0B were fixed

Added support for non-encrypted

channelsReceived Signal Strength Indicator

(RSSI)



BLUETOOTH 1.2

Backward compatible with 1.1Faster connection and discovery

Improved resistance to Radio

Frequency interferenceHigher transmission speeds

Improved voice quality of audio links byallowing retransmission of corruptedpages

Host Controller Interface support.



BLUETOOTH 2.0

Specified in November 2004Backward compatible with version 1.1

Introduction of Enhanced Data Rate (EDR) of

3.0 Mbits/s3 times faster transmission speed

Lower power conception thru a reduced duty

cycleMore available b/w

Further improved performance



BLUETOOTH 2.1

Will be adopted by BT SIG onceinteroperability testing has completed

Extended inquiry response

Encryption Pause Resume

Secure Simple Pairing

NFC(Near Field Communication)Cooperation



FILE TRANSFER PROFILE

•Profile provides:• Enhanced client-server interactions:

- browse, create, transfer folders

- browse, pull, push, delete files



HEADSET PROFILE

• Profile provides:

• Both devices must provide capability to initiate connection &

accept/terminate calls.

• Volume can be controlled from either device.

• Audio gateway can notify headset of an incoming call.



CORE BLUETOOTH PRODUCTS

• Notebook PCs & Desktopcomputers

• Printers

• PDAs

• Other handheld devices• Cell phones

• Wireless peripherals:

• Headsets

• Cameras

• CD Player

• TV/VCR/DVD

• Access Points

•

Telephone AnsweringDevices

• Cordless Phones

• Cars



OTHER PRODUCTS…

2004 Toyota Prius & Lexus LS 430 hands free calls

Digital Pulse Oximetry System

Toshiba Washer & Dryer

Nokia N-gage



A COMPARISON

WLAN



BLUETOOTH VS. IRD

Bluetooth

Point to Multipoint

Data & Voice

Easier Synchronization dueto Omni-directional and no

LOS requirement

Devices can be mobile

Range 10 m

•IrD

— Point to point

— Intended for Data Communication

— Infrared, LOS communication

— Can not penetrate solid objects

— Both devices must be stationary, for

synchronization

— Range 1 m



ADVANTAGES

Cost Effectiveness: This is cost effective since the cost

of connectivity and their recurring costs are notinvolved.

It is very standardized which guarantees a high level of inter operate ability .

It operates on bi-directional mode

Voice and data coexists in this technology. Interaction of locally connected so many peripherals are

there which is called peer to peer or ad-hoc network.

There is an acknowledgement system guaranteed for data transmission.

It has a very strong frequency hopping technology andhas a reliable error correcting codes compared to433MHz, or even Wi-Fi type systems.

Energy consumed in this technology is very low.



LIMITATIONS

Short Range operations: This technology is useful in

only short range of operations. That means the devices

exchanging information have to be carried along if

moving with a laptop to somewhere outside the range.

Hence it can be said that this system is unable to copewith mobility.

Bluetooth standards does not address routing in

piconets and scatternets .

Multi-hop multicasting is absent in this technology.

Bluetooth is not fully developed and integrated into all

the products involved

we have to still wait for it to get fully evolved.



THANK YOU

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6139331 Bluetooth Technologies

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