Bluetooth Meaning / Explanation | Bluetooth Features & Types
Bluetooth is nothing but a kind of wireless protocol used for exchange of data over short range of distances. This protocol can be used from mobile devices and from fixed devices also. It is useful in the creation of personal area networks.
Class and Supported Profiles are the two major parameters of Bluetooth enabled devices. Class denotes the minimum distance over which Bluetooth connection is possible. Most of the present day (2012) mobile phones are of Class 2 that means, they can transfer files up to the range of ten meters. In yester year mobiles, Class 1 technology used to be present and they work only in the range of hundred feet.
Profile of Bluetooth refers to the type of connection. Commonly used profiles are handsfree or HFP and headset or HSP profiles. Other kinds of profiles of Bluetooth technology are OBEX or Object Exchange allowing the transfer of events, contacts, files, A2DP, AVRC, etc.
A2DP: It stands for Advanced Audio Distribution Profile. It is useful for streaming stereo music in a wireless manner to speakers or headphones over Bluetooth. It is the only way for streaming stereo signals.
EDR: It stands for Enhanced Data Rate. It is a feature of Bluetooth which can be turned on or off based on the users’ choice. This technology provides faster data transfer rate or provides improved speed. Another special feature of Enhanced Data Rate is that it improves battery life. Only modern Bluetooth devices can support this technology. Support of Bluetooth device for EDR will depend on the supported profiles and version of the Bluetooth. When both the devices participating in the transfer have support for EDR, then this technology will come in to force automatically.
AVRCP: It stands for Audio/Video Remote Control Profile. It enables the remote control of media playback on other devices. Functions supported through this technology are Play, Stop, Pause, Previous and Next.