How Bluetooth technology works? Big Tech Bang explains - Part 1

     Nowadays one of the widely used technology in almost all devices is Bluetooth. Some smartphone companies stopped providing headphone jack in their smartphones because of Bluetooth headphones present in market.

     We may think why Bluetooth won't work in long distance? Here I have explained the working of Bluetooth technology. So let's get started.

Definition

     A Bluetooth technology is a high speed low powered wireless communication technology link that is designed to connect phones and other devices. It uses low power Radio communication signal to link phones, computers and other devices over short distance. The distance can be up to 30 ft.

History of Bluetooth

     Bluetooth was named after a Danish Viking and king, Harald Blatand . His lastname means Bluetooth in English.

 In 1994 Ericsson Mobile Communications had taken a task to find alternative to the use of wires for the transmission of data between devices. In 1998, Ericsson, IBM, Nokia and Toshiba formed the Bluetooth Special Interest Group. The first version was released in 1999.

Bandwidth

  

     It supports on the frequency band of 2.45 GHz and can support up to 721 Kbps. This frequency band has been set aside for industrial and medical usage.

Versions

• First version was 1.2 standard with speed of 1 Mbps.
• Second version was 2.0+EDR with speed of 3 Mbps.
• Third version was 3.0+HS with speed of 24 Mbps.
• Latest version is 5.0.

Working

     Bluetooth consists of a Personal Area Network or a piconet which contains minimum of 2 devices and maximum of 8 devices. Basically single master and 7 slaves

     The master device initiates the communication between the devices. The master device control traffic itself and between the devices. 

     The slave device is the device which respond to the master device. It ensures the synchronization between the master and the slave devices.

     The slave device will respond in the time slot given by the master device or allocated explicitly.

     The transmission happens using frequency hopping technique.

     The master device first send the radio signal to the slave device. Then the slave device will respond and provides synchronization and the clock is also synchronized.

     The specifications and applications of Bluetooth is provided in next post. To read that click here. Subscribe to the blog for more informative contents. Thanks for reading and have a nice day.