Shift in Bluetooth

Normally when a communication technology is evolving it will try to increase its transmission rate. So the Bluetooth technology was also evolving similarly and the main evolutions are:

1. First one was Basic Rate (BR) (the name came after the evolution into second one). It was having a physical layer with 1 Mbps.
2. Secondly the Enhanced Data Rate(EDR) i.e. V.2.0 which increased the data rate upto 3Mbps.
3. Then introduced an Alternative MAC PHY layer (AMP) on V.3.0 which eventually given a speed of about 54Mbps.

There needed a technology which uses much lesser power for prolonged use. Even though other low power RF wireless technologies were there, they were not having a unique encrypted protocol for communication. These made the researchers to think of making the Bluetooth Low Energy V4.0(BLE) protocol which is a cheaper low power protocol compared to older Bluetooth technology. For that they sacrificed the transmission rate but maintaining or improving other parameters. They reduced the transmission data rate to about 0.3Mbps which works under extreme low power. Today more BLE products are coming to market as Bluetooth Smart devices which needed lesser energy!