25-08-2011, 10:50 AM
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What is Bluetooth?
Why is the technology called Bluetooth !
Bluetooth! The word was borrowed from the 10th century, second King of Denmark, King Harald Bluetooth.
He played a major role in uniting Denmark and Norway as also in the introduction of Christianity in Denmark.
His states include “Norway” & “Sweden” from which Ericsson comapany is belongs to(founder of bluetooth technology).
How Does Bluetooth Work?
Bluetooth is a technology, where by, devices communicate wirelessly to achieve data transfer at the rate of 720 kbps within a range of 10 to 100 meters. It operates in the unlicensed ISM (Industrial Scientific and Medical) band at 2.4 gigahertz.
A Bluetooth device consists of a special type of chip.This chips were design to take all of the information that your wires normaly send and transmit at special frequency.The chip is known as reciver blouetooth chip.
Bluetooth Networking components :
Piconet: A group of devices connected by means of Bluetooth technology is known as a piconet. There can be a maximum of 8 devices forming one piconet. One device acts as the master and others act as slaves.
Scatternet: A scatternet is composed of two or more independent piconets. This brings about a communication between piconets.
BNC……..
Master unit: It Is used to synchronize other devices in the piconet. The master device numbers the communication channels.
Slave unit: The slave units act in co-ordination with the master.
PAN ( Personal Area Network): PAN refers to the distance between the devices.
Data transmission
Data can be transmitted both synchronously and asynchronously.
The Synchronous Connection Oriented (SCO) method is used primarily for voice.
Asynchronous Connectionless (ACL) is primarily for data. Within a piconet, each master-slave pair can use a different transmission
Slaves cannot transmit data until they have been polled by the master
Bluetooth Characteristics:
It separates the frequency band into hops.Up to eight devices can be networked in a piconet
Signals can be transmitted through walls and briefcases, thus eliminating the need for line-of-sight.
Devices do not need to be pointed at each other, as signals are omni-directional.
Both synchronous and asynchronous applications are supported, making it easy to implement on a variety of devices and for a variety of services, such as voice and Internet
Applications
devices
Bluetooth dongle.
Bluetooth in Mobile
Bluetooth in car
ADVANTAGES OF BLUETOOTH TECHNOLOGY
.No line of site restrictions as with Infrared technology.
Low power consumption.
Tremendous momentum not only with in the computer industry
but other industries like cellular telephones and transportation.
Bluetooth Limitations
Communication speed is not that great with Bluetooth technology. WiFi and Infrared communication can happen at much higher speeds compared to that of Bluetooth
if a user happens to leave his device in the 'discoverable' mode, a hacker can establish a connection with the 'discovered' device without the user knowing about it.
What is Bluetooth?
Why is the technology called Bluetooth !
Bluetooth! The word was borrowed from the 10th century, second King of Denmark, King Harald Bluetooth.
He played a major role in uniting Denmark and Norway as also in the introduction of Christianity in Denmark.
His states include “Norway” & “Sweden” from which Ericsson comapany is belongs to(founder of bluetooth technology).
How Does Bluetooth Work?
Bluetooth is a technology, where by, devices communicate wirelessly to achieve data transfer at the rate of 720 kbps within a range of 10 to 100 meters. It operates in the unlicensed ISM (Industrial Scientific and Medical) band at 2.4 gigahertz.
A Bluetooth device consists of a special type of chip.This chips were design to take all of the information that your wires normaly send and transmit at special frequency.The chip is known as reciver blouetooth chip.
Bluetooth Networking components :
Piconet: A group of devices connected by means of Bluetooth technology is known as a piconet. There can be a maximum of 8 devices forming one piconet. One device acts as the master and others act as slaves.
Scatternet: A scatternet is composed of two or more independent piconets. This brings about a communication between piconets.
BNC……..
Master unit: It Is used to synchronize other devices in the piconet. The master device numbers the communication channels.
Slave unit: The slave units act in co-ordination with the master.
PAN ( Personal Area Network): PAN refers to the distance between the devices.
Data transmission
Data can be transmitted both synchronously and asynchronously.
The Synchronous Connection Oriented (SCO) method is used primarily for voice.
Asynchronous Connectionless (ACL) is primarily for data. Within a piconet, each master-slave pair can use a different transmission
Slaves cannot transmit data until they have been polled by the master
Bluetooth Characteristics:
It separates the frequency band into hops.Up to eight devices can be networked in a piconet
Signals can be transmitted through walls and briefcases, thus eliminating the need for line-of-sight.
Devices do not need to be pointed at each other, as signals are omni-directional.
Both synchronous and asynchronous applications are supported, making it easy to implement on a variety of devices and for a variety of services, such as voice and Internet
Applications
devices
Bluetooth dongle.
Bluetooth in Mobile
Bluetooth in car
ADVANTAGES OF BLUETOOTH TECHNOLOGY
.No line of site restrictions as with Infrared technology.
Low power consumption.
Tremendous momentum not only with in the computer industry
but other industries like cellular telephones and transportation.
Bluetooth Limitations
Communication speed is not that great with Bluetooth technology. WiFi and Infrared communication can happen at much higher speeds compared to that of Bluetooth
if a user happens to leave his device in the 'discoverable' mode, a hacker can establish a connection with the 'discovered' device without the user knowing about it.
