Bluetooth

Background

The origin of Bluetooth

The development of Bluetooth began 1994 with Ericsson, when they looked for a possibility to remove the cables between mobile phones and accessory equipment. Together with other industrial partners the Bluetooth SIG was created in 1998, in order to establish Bluetooth as de facto standard. Therefore the goal was set to specify a transceiver with small manufacturing costs, flexible application areas, low energy consumption, robustness in relation to disturbances and the ability to transmit data for multimedia applications. The Bluetooth standard was adopted in the meantime by the IEEE working group for WPANs as IEEE 802.15.1 (ieee802.org/15/Bluetooth/).

The name Bluetooth comes from the the Danish king Harald Blåtand (the surname means as much as blue tooth), who succeeded as first to unite large ranges of Scandinavia (parts of Denmark, Sweden and Norway) under its rule in the middle Ages. The idea behind Bluetooth was to unite the communication of different electronic equipment, just as Harald Blåtand did with Scandinavia.

Bluetooth got widespread and interesting starting with its specification version 1.1. From there on a lot of manufacturers of mobile phones, PDAs, computer and other devices began to integrate Bluetooth as standard in their equipment; this was around 1999 – 2001.

The version 2.0 of the Bluetooth specification has been released in November 04, with predominantly higher data rates (up to 2,2 MBit/s) and improvements in coexistence with other 2.4 GHz devices (adaptive frequency Hopping).

Bluetooth 3.0

Bluetooth 3.0 has a transmitting rate up to  480 MBit/s. This is possible by using the ultra-wide-band-technology.

Ultra Low Power Bluetooth

Ultra Low Power Bluetooth (ULP, earlier Wibree) is the low-power solution from Bluetooth. The range is limited to 10m with a maximal transfer rate of 1MBit/s.

Present from the outset

Even before the upswing of Bluetooth we already dedicated ourselves to this Wireless technology in the form of project works and theses (diploma), in order to determine its value. A large future showed off thereby and the expertise was transferred to our Institute in order to ensure a professional handling.

Technical Data

Frequency range, Amount of channel:

Bluetooth1.1 2,402 GHz - 2,480 GHz, 79 * 1MHz
Bluetooth2.0 2,402 GHz - 2,480 GHz, 79 * 1MHz
Bluetooth 3.0 3,4 GHz - 10,3 GHz, 14*  500MHz
Ultra Low Power Bluetooth 2,402 GHz - 2,480 GHz, 79 * 1MHz

Data transmission rate:

Bluetooth 1.1 and 1.2 723.2 kBit/s
Bluetooth 2.0  2.1MBit/s
Bluetooth 3.0 480MBit/s, Ultra Wide Band
Ultra Low Power Bluetooth 1MBit/s

Transmitting Power and Range:

Class Max. Power [dB] Range
1 100mW 20 dBm ~100m
2 2.5mW 4 dBm ~20m
3 1mW 0 dBm ~10m

Applications:

Surfen, Printing, File-Transmission, Synchronisation, etc.

Device-Examples:

Handy, PC, Mouse, Keyboard, Modem