Federal Network Agency

Bluetooth

Overview

Bluetooth

Bluetooth is a local-area radio system for the cable-free interconnection of information technology devices over short distances. It allows a great variety of mobile terminals to be interconnected in a short time, e.g. mobile phone and earphones (headset), PC, Notebook, laptop, printer, scanner, cordless mouse and wireless keyboard. Both data and speech are transmitted.

Further applications involve the connection of PC peripherals with the actual PC. Bluetooth is primarily intended to replace existing cable connections because frequently incompatible connector standards preclude data exchange between different devices. Another advantage is the autonomous establishment of connections between the devices.

Bluetooth operates in the unlicensed ISM band (Industrial, Scientific, Medical) in the 2.4 GHz frequency range with a transmit power of between 1 mW to 100 mW, depending on class. The ranges covered vary between 5m and 100m. To avoid interference, the communicating Bluetooth devices change frequency 1600 times per second (frequency hopping). The maximum gross data rate is 1 Mbit per second, of which 0.7 Mbit/s is user data. The latest specifications enable bit rates of up to 24 Mbit/s. The maximum number of communication partners is 256, of which 8 may be active at the same time.

 

Date of modification: 2010.07.14

Additional Information

Technology - abstract

- Overview

- Limits

- Technology

- Applications

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