DEVELOPED BY::-

LUQMAN YUNAS Junaid Iqbal

Muhammad Usama

UNIVERSITY OF WAHWAH CANTT

B L U E T O O T H( S H O R T R A N G E C O M M U N I C A T I O N

T E C H N O L O G Y )

INTRODUCTIONBluetooth is a short-ranged wireless communication technology implementing the radio waves for the communication between the fixed or portable devices without the need of cable wire while maintaining the high level of security. Unlike the infrared, Bluetooth doesn’t need the ‘line of sight’ for transmission. Hence it is much more flexible. Originally it was considered as the wireless alternative for RS-232 standard cable transmission. One of the most significant recent developments in wireless technologies is the emergence of Wireless personal area networking (WPAN). Developed in 1998, WPAN is based on a new technology called Bluetooth, which uses short-range radio frequencies to transmit both voice and data.

Bluetooth specification:

Things that you must have: Transceivers and Receivers that can send and receive data

because they use Radio waves PIN Number

To identify the user using the device. A Piconet A FHHS protocol

What is piconet

A Piconet session is a communication link that must be created between devices for devices to communicate with each other.

This is done when the MAC address and the PIN number match.

If two devices come onto contact with each other( 32 feet) the user will be prompted to initiate a communication session

Piconet (cont.) Users then can either deny or accept the request to initiate a

session

Only devices approved by the user can take part in the session

Data will appear as noise to unauthorized devices (A great security feature).

FHSS(Frequency hopping spread spectrum) Bluetooth devices use a protocol called (FHHS)

Frequency- Hopping Spread Spectrum . Uses packet-switching to send data. Bluetooth sends packets of data on a range of

frequencies. In each session one device is a master and the

others are slaves. The master device decides at which frequency data

will travel.

FHSS (cont.)

The master device tells the slaves at what frequency data will be sent.

This technique allows devices to communicate with each other more securely

FHSS EXAMPLE:

Source: http://www.xircom.com

GENERAL ARCHITECTURE:The Bluetooth network we can refer to

Piconet. During this connection there are number of devices that shares the

common radio channel. The device that initiates the connection is called the

master device and all the other devices in the Piconet network are called slaves. Bluetooth Implies ad-hoc networking

strategy in which network will be established only when we want to

transmit data and disconnect after task has been accomplished.

ARCHITECTURE(CONT.) Master devices have up to seven slaves at same

time. But this will cause towards reduce data transmission. Also possible that on device can have connection with other more Piconet. This type of multi-connection with different Piconets is called Scatternet

ARCHITECTURE(CONT.)

A: Point to point connection between two devices (a master and a slave)B: Point to multipoint connection between a master and three slave devices.C: Scenario showing the Scatternet containing three Piconets. 

About Designers of Project

FOR MORE INFORMATION PLEASE VISIT FOLLOWING SITES:

www.xircom.com www.palowireless.com www.bluetooth.com

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