Bluetooth

CONTENTS

1-What is Bluetooth?

2-History. 3-Technology Review. 4-Basic Ideas About Bluetooth. 5-Bluetooth Architecture. 6-Competting Technologies. 7-Advantages And Disadvantages Of Bluetooth. 8-Future of Bluetooth. 9-Conclusions. 10-References.

What is Bluetooth?

Bluetooth is a short range(10-100m) and low-cost wireless network system to replace cables and give RF connection between consumer devices.

Bluetooth Was Originally a Cable-Replacement Technology

HISTORY

The word ‘Bluetooth’ is taken from the 10th century Danish King Harald Bluetooth,he had been influential in uniting Scandinavian tribes into a single kingdom.

Bluetooth was so named because: 1) Bluetooth technology was developed in

Scandinavia. 2) Bluetooth technology is able to unite differing

industries such as the cell phone, computing,and automotive markets.

TECHNOLOGY REVIEW

Bluetooth uses a radio technology called frequency -hopping spread spectrum.

Supports data rate of 1 Mb/s(originally). The Bluetooth specification are developed

and licensed by the Bluetooth Special Interest Group(SIG).

BASIC IDEAS ABOUT BLUETOOTH: 1)-Bluetooth Characteristics

2)-Classes of Bluetooth 3)-Bluetooth enabled

devices 4)-Bluetooth Details

Bluetooth Characteristics: Allows up to 8 devices to communicate in a

localnetwork called a Piconet, also known as a PersonalArea Network or PAN

Because of its low power consumption, its range islimited to 10 m.

However, range can be increased to 100 m by employing a scatternet topology or a higher powered antenna.

Classes Of Bluetooth:Three classes of bluetooth devices: 1) Class 3 radios: Have a range of upto

1 meter or 3 feet.

2) Class 2 radios: Most commonly found

in mobile devices-have a range of 10 meters

or 30 feet.

3) Class1 radios: Used primarily in industrial use cases-have a range of 100 meters or 300 feet .

Bluetooth Enabled Devices: Laptop Cellular phones Personal Digital assistants Headsets Printers Keyboards GPS,etc Major use in consumer electronics

Bluetooth Details: Uses the radio range of 2.45 GHz. Theoretical maximum bandwidth is 1

Mb/s. Several Bluetooth devices can form an ad

hoc network called a “piconet”. -In a piconet one device acts as a master (sets

frequency hopping behavior) and the others as slaves.

- Example: A conference room with many laptops wishing to communicate with each other.

BLUETOOTH ARCHITECTURE

The Bluetooth technology is divided into two specifications:

Core Specification -Deals with the lower layers of the architecture and describes how the technology works.

Profile Specification - Focuses on how to

build interoperating devices using the core technology.

Competting Technologies: Infrared Data

Association(IrDA):synchronization, link between a phone and a laptop…

– Less flexible than Bluetooth, need of a line of site.

– Comparable data rate.

Wi-Fi (WLAN) : Wireless LAN access – Far higher bandwidth and data

rate than Bluetooth. – Higher power consumption than

Bluetooth. – Requires infrastructure

investment.

ADVANTAGES AND DISADVANTAGES OF BLUETOOTH TECHNOLOGY

ADVANTAGES: Eliminates wires. Facilitates Data and Voice

Communication. Standardized protocol. Free of charge. Easy to use.

DISADVANTAGES: Relatively short range. Less secure. Interference with other devices.

FUTURE OF BLUETOOTH: Bluetooth has a good future ahead

because it meets a basic need of connectivity.

Latest version of Bluetooth are improving both its security and capabilities.

New versions of Bluetooth technology will meet the high-speed and large range.

Many companies are designing impressive bluetooth applications in demand.

CONCLUSIONS: A new global standard for data and voice Eliminates Cables. Low Power, Low range, Low Cost

network devices. Bluetooth seems to have a bright future

after reviewing its benefits and wide use.

Further improvements are planned to be made in :

1-Data rates 2-Power Reduction 3-Range

REFERENCES: Bluetooth Architecture Overview James Kardach www.bluetooth.com www.palowireless.com www.google.com www.wikipidia.com