bluetooth(BT) - br edr le

bluetooth basic rate(BR)

bluetooth enhanced data rate (EDR)

bluetooth low energy (LE)

[링크 : http://smartits.tistory.com/m/16]

 

BR/EDR은 bt classic으로 LE는 다르게 정의 되는 듯.

Bluetooth® Classic The Bluetooth Classic radio, also referred to as Bluetooth Basic Rate/Enhanced Data Rate (BR/EDR), is a low power radio that streams data over 79 channels in the 2.4GHz unlicensed industrial, scientific, and medical (ISM) frequency band. Supporting point-to-point device communication, Bluetooth Classic is mainly used to enable wireless audio streaming and has become the standard radio protocol behind wireless speakers, headphones, and in-car entertainment systems. The Bluetooth Classic radio also enables data transfer applications, including mobile printing. Bluetooth® LE The Bluetooth LE radio is designed for very low power operation. Transmitting data over 40 channels in the 2.4GHz unlicensed ISM frequency band, the Bluetooth LE radio provides developers a tremendous amount of flexibility to build products that meet the unique connectivity requirements of their market. Bluetooth LE supports multiple communication topologies, including point-to-point, broadcast and mesh. While initially known for its device communications capabilities, Bluetooth LE is now also widely used as a device positioning technology to address the increasing demand for high accuracy location services. Bluetooth LE now includes features that enable one device to determine the presence, distance, and direction of another device.

[링크 : http://www.bluetooth.com/ko-kr/learn-about-bluetooth/bluetooth-technology/radio-versions/]

 

bluetooth / bluetooth smart ready / bluetooth smart 이건 bluetooth 4.0 부터 나온 개념이라고 한다.

bluetooth - bluetooth classic

bluetooth smart ready - bluetooth classic + BLE 지원

bluetooth smart - BLE only

 

 

 

[링크 : http://medium.com/@zoyi_product/bluetooth-low-energy-ble-84b03705ffca]

 

ble advertising packet

[링크 : http://blog.msalt.net/210]