1. What is Blue Tooth ? Blue tooth is a cable replacement technology that can be used to connect almost any device to any other devices. Blue tooth is the implementation of a protocol defined by IEEE 802.15 standard. WPAN Wireless Personal Area Network.

2.  Short Range wireless (10 – 100 m).  Low Power Transmission (1 – 100 m W).  Lower Data Rates < 1 Mbps like audio, text, graphics & even Video  Using 2.4 GHz ISM Band.  FHSS over 79 Chls (1 MHz each), 1600 hops/sec, to avoid freq selective fading & provide security.  Non Line Of sight communication. What is Blue Tooth ?

3. Blue Tooth Logo showing Blue tooth enabled devices i.e. home appliances, Laptop/PDA/ Palm top/Desktop etc

4. History Of Blue Tooth  Blue Tooth Technology was originally started by the Eriksson company. It is named for Blaatand King of Denmark (Blue Tooth in English).  SIG (Special Interest Group) in May 1998  Founding Members :- Erikson, Toshiba, Intel, IBM, Nokia.  Now all of biggest companies in Telecom Business joined the SIG – 1500 Members.

5. Blue Tooth Architecture Blue Tooth defines two types of Networks. 1- Pico Nets (Adhoc Network )  A small net.  A Piconet can have up to 8 stations – one of which is called Master, the rest are called Active Slaves.  All the stations synchronize their clocks / hoping sequences with (as set by Master).  Pico Net can have only one Master Station.

6. Parked Slave Although a Pico net can have a max of seven slaves, an additional slaves can be in parked state. A Slave in Parked state is synchronized with Master but cannot take part in communication until it is moved from the parked state in to active state. Pico Net

7. The communication between the master & the slaves can be one to one & one to many. A Slave may only communicate with Master& may only communicate when granted permission by the Master.

8. Scatter Net  Piconets can be combined to form what is called a Scatter Net. A slave station in one piconet can become the master in another piconet.  This station can receive messages from the master of first piconet (as a slave) and acting as a master deliver it to slaves in the second piconet.  A station can be a member of two piconets.

9. Co-existence Of BT in Wi-Fi N/Ws  Wi-Fi Networks 802.11 use also 2.5 GHz Band same as used in Blue tooth Networks.  There is a possible chance of interference with each other.  Can be controlled by reducing transmit power of Blue tooth devices ( 1-100 mW) while in case of Wi-Fi transmitters (1-4 W).

10. Blue Tooth Applications Internet Bridge: Use your portable PC to surf internet any where. Whether you are connected wirelessly through mobile fone or through a wired connection (PSTN, xDSL, ISDN)

11. Blue Tooth Applications Data Access Point: LAN access replaces a cable with a blue tooth link.

12. Interactive Conference: In meeting /conference, you can share information instantly with other participants. Users are able to transfer files a business cards, fone records or larger files between them. You can also operate a projector remotely without wire connectors. NLOS Environment Blue tooth can replace a wired /IR link to transferring files b/w devices. Professor & class example. Blue Tooth Applications

13. Delayed Messages/Emails: Compose email on yours PC while you are in plan. When you land & switch yours mobile fone ON, the messages will be sent immediately. Cordless Desktop Connect your Laptop/Desktop cordlessly to printer, scanner, keyboard & mouse. Blue Tooth Applications

14. The Ultimate Headset : The blue tooth headset can create an audio link to other Blue tooth equipped devices. Make & receive calls from headset connected remotely to cell fone/PSTN.

15. Automatic Synchronization Blue tooth can provide convenient file synchronization between several devices. For Example :- Office desktop & PDA, Home Desktop & PDA. Blue Tooth Applications

16. Health Care Center: Monitoring devices can communicate with sensor devices in IC Units. Security Devices : Installed Sensors i.e. door opening, smoke detector for security purposes may communicate with Main Room. Blue Tooth Applications

17. Misc Applications: A BT enabled PDA can be used for accessing flight information at an airport. Ordering of an electronic menu at a Resturant. Obtaining information about players when attending a sport event. Blue Tooth Applications

18. In shopping Mall, it will provide all information about items to be sold. Blue Tooth Home Network: When you are entering in yours home, you can open garage door, home door electronically, turn on home appliances i.e oven, lights, fans, ACs. To set the alarm Joy sticks & Loud speakers, KEY BOARDS Blue Tooth Applications