Bluetooth This one of very commonly used word now a days in our life.

We must have heard this thing from various links our friends,collegues and other sources such as tech mags. So lets read soemthing about it..

Whenever we listen to a nice or one of our favorite song on our friend’s cellphone or an image or wallpaper or want to receive some data from other’s mobile device. So lets elaborate it.

Bluetooth can be termed as a device which is used for transfer of data within short distances.Bluetooth wireless technology enables us to secure, robust and wireless connection between mobile devices and fixed devices. In other words “Bluetooth wireless technology is built into electronic gadgets and lets you talk and share information like voice, music, and videos wirelessly.” While transferring the data from a mobile device to another mobile device it creates a PAN (Personalized Area Network) and allows us to connect various devices. It was created by telecom company Ericsson in 1994.

The Name – The name “Bluetooth” is actually very old! It is from the 10th century Danish King Harald Blatand – or Harold Bluetooth in English. King Blatand was instrumental in uniting warring factions in parts of what is now Norway, Sweden and Denmark – just as Bluetooth technology is designed to allow collaboration between differing industries such as the computing, mobile phone and automotive markets.

Bluetooth uses a radio technology called frequency-hopping spread spectrum, which chops up the data being sent and transmits chunks of it on up to 79 bands (1 MHz each) in the range 2402-2480 MHz. This is in the globally unlicensed 2.4 GHz short-range radio frequency band.Bluetooth provides a secure way to connect and exchange information between devices such as faxes, mobile phones, telephones, laptops, personal computers, printers, Global Positioning System (GPS) receivers, digital cameras, and video game consoles.The Bluetooth specifications are developed and licensed by the Bluetooth Special Interest Group. The Bluetooth SIG(Special Interest Group) consists of more than 13,000 companies in the areas of telecommunication, computing, networking, and consumer electronics.

Bluetooth is a protocol which is connected in master slave connection and a master can communicate with almost 7 slaves creating a network which is called as piconet.In this piconet each slave can anytime switch its role and become master. Just like an internet connections 2 piconet can also connected to each other.

Now a days bluetooth is provided in various devices such as telephones, cellphones, WIFI, playstations, PSPs, modem, printers, iPod touch, watches etc. This is used between a mobile phone and its headset, various PC input and output devices very common names are mouse,keyboards, printers. It replaced the serial wired connection and places controlled by infrared. If your personal computer do not have embedded bluetooth connection then you can use bluetooth dongles for that purpose. Apple provided support for bluetooth in 2002 in its Mac OS X. and windows in its Windows XP sp2 and sp3.

The various version of bluetooth are:

1)v1.0 , v1.0B

2)v1.1 – This removed various drawbacks of version 1.0B

3)v1.2 – This was compatible with 1.1 and with faster connection and searching of devices

4)v2.0 + Enhanced Data Rate – This is with enhanced data rate for the faster transfer of data with the theoretical speed of almost 3mbps but the actual speed was 2.1mbps

5)v2.1 + Enhanced Data Rate – The main features of this is Secure Simple Pairing, reduction in power consumption in low frequency mode

6)v3.0+HS – This version has the theoretical speed of about 24mbps.

7)the Bluetooth SIG completed the Bluetooth Core Specification version 4.0, which includes classic bluetooth , bluetooth high speed and bluetooth low energy protocols. Bluetooth high speed is based on WiFi, and Classic Bluetooth consists of legacy Bluetooth protocols.

Bluetooth technology was originally intended to be a wireless replacement for cables and wires between things like phones and headsets or computers, keyboards and mice. It works great in those devices and it can do so much more—connecting TVs, music players and even home devices.