¢ Bluetooth Wireless Technology
¢

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Presented By:
¢ NIKHIL BUDHIRAJA
¢ roll no 7154

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What Is Bluetooth
You're coming back home
after a long, hard day. You've met
some important people and entered notes about the meetings in your PDA. Now, you want to transfer the information to your PC. The traditional way to do this is to pull out the Hotsych cradle, connect the two together, and start the transfer¦...
Consider this scenario instead - the moment you enter your room, you touch a button on your PDA, and the data gets transferred to your PC. NO physical connections, no need to start up synchronization software, not even the need to be near your PC. Wouldn't you like that Say hello
to



¢ INTRODUCTION (Bluetooth = No cables)
¢ Bluetooth is a global de facto standard for wireless connectivity. Based on a low-cost, short-range radio link, Bluetooth cuts the cords that used to tie up digital devices.
¢ When two Bluetooth equipped devices come within 10 meters range of each other, they can establish a connection together. And because Bluetooth utilizes a radio-based link, it doesn't require a line-of-sight connection in order to communicate.



Why the Funny Name
¢ Bluetooth is named after King Harald BlÃ¥tand (Bla: dark skinned, tan: great man) of Denmark who united Denmark and Norway in the 10th century.
¢ Bluetooth is similarly expected to unite the worlds of computing and telecom.



Know your History !
1994 - Ericsson releases
Bluetooth specification.
Early 1998 - Bluetooth Special
Interest Group (SIG) was formed.
July 1999 - Bluetooth 1.0 Specification Release.
2000 - 2001 - Ongoing work on Bluetooth 2.0 Specification.


The Bluetooth SIG

¢ The Bluetooth Special Interest Group is an industry group, comprised of leaders in the telecommunications and computing industries that are driving development and promotion of Bluetooth wireless technology and bringing it to market in a broad range of products.
¢ The SIG has over 2500 member companies worldwide.
¢ Bluetooth is an open standard. The Bluetooth standard is available royalty-free at the official Bluetooth website Bluetooth.com


Bluetooth in Action
Bluetooth can give you a new kind of freedom. You might share information, synchronize data, access the Internet, integrate with LANs or even unlock your car - all by simply using your Bluetooth equipped mobile phone.



Bluetooth Makes Life Easier¦..
You arrive at the office and put down your briefcase, while your Personal Digital Assistant (PDA) automatically synchronizes with your desktop PC and transfers files, e-mails and schedule information.

While in a meeting, you access your PDA to send your presentation to the electronic whiteboard. You record meeting minutes on your PDA and wirelessly transfer these to the attendees before they leave the meeting.

Upon arriving at your home, the door automatically unlocks for you, the entry way lights come on, and the heat is adjusted to your pre-set preferences.

An alarm notifies you that your toddler has just left the house
You arrive at the airport. A long line is formed for ticketing and seat assignment. You avoid the line, using your PDA to present an electronic ticket and automatically select your seat. The airline's on-line system checks identification via the "ID-tag" feature built into your PDA and confirms your reserved seat.

You arrive at the hotel. As you enter, you are automatically checked in and your room number and electronic key are transferred to your PDA. As you approach the room, the door automatically opens.



As you approach your vehicle, the door unlocks automatically, the radio tunes in your favorite station, and the seat adjusts to your preferred settings.
As you enter your vehicle, you are reminded of the items on your daily calendar and the results of a recent diagnostic test of your vehicle.

You receive a new message en route, which is verbally transmitted to you via the vehicle's speakerphone



Technical Specifications\
¢ Normal range 10 m
¢ Optional range 100 m
¢ Normal transmitting power 1 mw
¢ Optional transmitting power 100 mw
¢ Receiver sensitivity -70 dBm
¢ Frequency band 2.4 GHz
¢ Gross data rate 1Mbps
¢ Max. Data transfer 721 +56 kbit/3 voice channels
¢ Power consumption, standby 20 µA
¢ Power consumption, max. 30 µA
Packet switching protocol based on a frequency hop scheme with 1600 hops/s


How Do Bluetooth Devices Deal With Interference
¢ Radio waves can pick up noise from nearby devices like microwave ovens especially since the ISM band is unlicensed. This is where a technique called "frequency hopping" comes into the picture.

¢ Bluetooth has chosen to provide an acknowledgment-based scheme with automatic repeat request (ARQ). What is transferred during a Bluetooth communication are packets. With frequency hopping, after the transmission or reception of a packet, the device hops or changes to a different frequency. The signal frequency changes about 1600 times per second.

¢ In addition, it uses smaller packets and the header information in packets which is very critical to the page link operation is protected first by a cyclic redundancy check and further a 1/3 rate Forward Error Check (FEC) is applied, which repeats each bit three times.



Security “ How Much Is Too Much
¢ The Bluetooth system is intended to be used as a uniform interface to all of a person's information sources and will thus be expected to transfer sensitive personal data. Security of the data is thus an important issue.
¢ Bluetooth devices are expected to be omnipresent and at some places the access to these devices by public users may have to be restricted. This calls for authentication procedures to be provided.
¢ The scheme used by the Bluetooth standard to tackle these issues is referred to as the challenge response scheme.
¢ The application may itself encrypt its data for added security. That can add to the safety of the data, but the most of the authentication is based on the page link level security procedures.


The Dream
You enter a bus and your bus fare is automatically paid by your mobile phone
You could even use your mobile phone to control the locking and alarm on your car, as well as integrate it with the car's stereo so you can talk hands free while you are driving.