1. BLUETOOTH TECHNOLOGY

2. WHAT IS BLUETOOTH:
Bluetooth is a wireless technology used to
transfer data between different electronic
devices. The distance of data transmission is
small in comparison to other modes of
wireless communication. This technology
eradicates the use of cords, cables, adapters
and permits the electronic devices to
communicate wirelessly among each other.
(or)
Bluetooth is a high-speed, low-power microwave
wireless link technology, designed to connect phones,
laptops, PDAs and other portable equipment together
with little or no work by the user.

3. HISTORY OF BLUETOOTH:
 Bluetooth was invented in 1994 by Ericsson.
 The company later started working with a larger group
of companies called the Bluetooth Special Interests
Group, or "SIG," to develop the technology into what it
is today.
 Bluetooth is not owned by any one company and is
developed and maintained by SIG.
 The name Bluetooth came from a code name originally
used by SIG for the project and is a reference to a 10th
century Danish king named Harold Bluetooth, who was
responsible for uniting Norway, Sweden, and
Denmark.

4. It comprises of a base band processor, a radio and an antenna . The base-band
processor converts the data into signals, the antenna of another blue tooth
device, within at least 30 feet distance, receives a transmitted signal in the air.
It uses a frequency hopping
spread spectrum technique
(FHSS) - which is one of two
basic modulation techniques
used in spread spectrum signal
transmission. Frequencies are
switched repeatedly during
radio transmission to help
reduce unlawful access or
other means of
telecommunications to cross
paths and cause interruption
What is Bluetooth Technology:

5. HOW DOES IT WORK?
• Bluetooth is a standard
for tiny, radio frequency
chips that can be
plugged into your
devices
• These chips were
designed to take all of the
information that your wires
normally send, and transmit
it at a special
frequency to something
called a receiver
Bluetooth chip.

6. BLUETOOTH SPECIFICATIONS:
• Each channel is divided into time slots 625
microseconds long
• Data in a packet can be up to 2,745 bits in length
• Packets can be up to five time slots wide

7. BLUETOOTH FREQUENCY
• Has been set aside by the ISM for exclusive use
of Bluetooth wireless products
• Communicates on the 2.45 GHz frequency

8. AVOIDING INTERFERENCE :
HOPPING
• Bluetooth uses a technique called spread-
spectrum frequency hopping.
• In this technique, a device will use 79 individual,
randomly chosen frequencies within a designated
range.

9. WHAT’S WITH THE NAME?
• King Harald Bluetooth (A.D. 940 to 985)
• 10th century Viking king in Denmark
• Credited for uniting the country and
established Christianity
• Viking states included Norway &
Sweden, which is the connection to
Ericsson (creator of bluetooth)

10. WHO STARTED BLUETOOTH?
• Bluetooth Special Interest Group (SIG)
-5 founding members
-Ericsson, Nokia, IBM, Intel & Toshiba
• Promoter’s Group
- 3COM, Lucent, Microsoft, Motorola
• Now over 1900 members
Ericsson Mobile Communication

11. Types Of Bluetooth Devices:
1. Head Set
2. In-Car Bluetooth System
3. Bluetooth Equipped Printer
4. Bluetooth Equipped Web Cam
5. Bluetooth GPS System
6. Bluetooth Key Board

12. IMPORTANCE OF BLUETOOTH:
 These have Replaced cables for transferring Information from one Electronic Device
to another one.
 These have decreased Strain like carrying phones while talking, making hands free to
do another work.
 This is cheaply Available.
 It’s Mobility is also very Important as it doesn’t need any power outlet or Internet
connection or any other items.

13. ADVANTAGES (+)
• Wireless (No Cables)
• No Setup Needed
• Low Power Consumption (1 Milliwat)
• Industry Wide Support

14. Disadvantages Of Bluetooth:
 Data sent between two Bluetooth devices is very slow
compared with Wi-Fi transfer Rate.
 Range Of a Bluetooth Device is 15-30 feet depending upon
the Device.
 Security is Biggest Disadvantage as transfer takes place
through radio waves and a hacker can easily hack it.
 Battery usage is also a problem, it will make device out of
power before it would have if Bluetooth was not powered on.

15. THE END