In 1994, Ericsson launched a study to investigate the feasibility of a new low-cost interface for interconnection consumption via radio (thus removing cables) between devices such as mobile phones and other accessories.
The study was based on a larger project that investigated some multicomunicadores connected to a cellular network, until it reached a binding short-range radio, called MC link. As the project progressed it became clear that this type of link could be widely used in many applications because it had as its main virtue was based on a radio chip.
Version 1.2, unlike 1.1, provides a wireless solution to co-exist complementary Bluetooth and Wi-Fi in the 2.4 GHz spectrum, without interference between them.
Version 1.2 uses the technique "Adaptive Frequency Hopping (AFH), which runs a more efficient transmission and stronger encryption. To improve the experiences of users, V1.2 offers a quality of voice (Voice Quality - Enhanced Voice Processing) with less noise and provides faster setup communication with other Bluetooth devices within range of the scope, such as PDAs, HIDs (Human Interface Devices), laptops, desktop computers, headsets, printers and phones.
Version 2.0, a specification created to be separate, mainly incorporates art "Enhanced Data Rate (EDR) that lets you improve transmission speeds up to 3Mbps while attempting to solve some errors in the specification 1.2.
Version 2.1 simplifies the steps to create the connection between devices, besides the power consumption is 5 times smaller.
Future of Bluetooth
Bluetooth Ultra Wide Band
On 28 March 2006, the Bluetooth SIG announced its intention to use Ultra-Wideband/MB-OFDM as physical layer for future versions of Bluetooth.
The UWB integration will create a version of Bluetooth technology with an option for large bandwidths. This new version will meet the requirements of synchronization and transfer of large amounts of data and high definition content for portable devices, multimedia projectors, televisions and VoIP phones.
At the same time, Bluetooth technology will continue to meet the needs of very low power applications such as mice, keyboards and mono headsets enabling devices to select the most appropriate physical layer for your requirements.
Ultra Low Power Bluetooth
On 12 June 2007, Nokia and Bluetooth SIG announced that Wibree will be part of the Bluetooth specification as an ultra-low power version. Its applications are mainly devices or remote sensors. It may be interesting for medical equipment. Nokia's proposal is to use the technology as low cost link to a mobile phone serving gateway to other technologies such as UMTS, Wi-Fi or Bluetooth it.