Bluetooth Technology: A Comprehensive Overview

Bluetooth technology allows users to form wireless connections between various communication devices to transmit voice and data. In 1998, five companies, Ericsson, IBM, Intel, Nokia, and Toshiba, jointly organized as Bluetooth Promoters. The technology operates in the 2.4 GHz band and uses frequency hopping spectrum to avoid interception by unauthorized parties. The software controls and identity coding built into each microchip ensure that only those units preset by their owners can communicate.

Key Takeaways:

• Bluetooth technology uses an open standard and specification for small form factor, low-cost, and short-range radio links between mobile phones and other portable devices.
• The technology operates in the 2.4 GHz band and uses frequency hopping spectrum, changing its signal 1600 times per second to avoid interception.
• The software controls and identity coding built into each microchip ensure secure communication between units preset by their owners.
• Bluetooth technology can support point-to-multipoint connections and data transfer within 10 meters distance with a power boost.
• The technology uses "omni-directional" radio waves and can support up to 7 slave devices communicating with a master radio in one device.
• The Blue tooth protocols are designated to operate in the 2.4 GHz ISM band, with each channel being 1 MHz wide and 79 different channels available.
• Spread spectrum technologies help to avoid interference between radio technologies.
• A Bluetooth device changes its frequency 1600 times per second to minimize interference.
• The master device decides on a hopping scheme related to its internal clock, while the slave device calculates an offset difference between master and slave clocks to determine the frequency to hop.
• In a Bluetooth network, each device has equal access to the entire network, and a slave device can establish connections to other networks.
• The technology supports multimedia applications, allows up to 8 devices to share information, and has low power consumption while providing security considerations like encryption.

Statistics:

• The first Bluetooth version was released in 1999.
• Bluetooth devices operate in the 2.4 GHz band.
• The frequency hopping spectrum changes signal 1600 times per second.
• Bluetooth technology uses "omni-directional" radio waves.
• There are 79 different channels available in the 2.4 GHz ISM band.
• Bluetooth devices can support up to 7 slave devices.
• The master device decides on a hopping scheme related to its internal clock.
• The technology operates within a 10-meter distance with a power boost.

Sources:

• Ericsson
• IBM
• Intel
• Nokia
• Toshiba
• Lucent
• Microsoft
• Motorola
• HT Media Ltd.