Bluetooth Technology

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Bluetooth technology [ English name: BLUETOOTH TECHNOLOGY ]
h) is a low-power short-range wireless connection technology standard. The word "Bluetooth" is taken from the nickname of King Harald II, who unified Denmark in the 10th century AD, namely "Bluetooth". The original advocates of "Bluetooth" technology were five world-renowned computer and communication companies: Ericsson, IBM, Intel, Nokia, and Toshiba. In May 1998, the "Bluetooth" Special Interest Group (Bluetooth Special Interest Group-SIG) was established. The organization adopted the strategy of free transfer of the patent technology to the industry to achieve its goal of global unified standards.

Its goal is to achieve a maximum data transmission speed of 1 Mbps (effective transmission speed is 721 kbps) and a maximum transmission distance of 10 meters. Users can use the 2.4 GHz ISM (Industrial, Scientific, Medical) band without permission, set up 79 channels with a bandwidth of 1 MHz, and use the frequency switching 1600 times per second and the spectrum diffusion technology of the hobbing method to realize the transmission and reception of radio waves. This is the origin and characteristics of Bluetooth technology. Devices that use Bluetooth technology for communication are divided into the "caller" that determines the frequency hobbing mode and its communication counterpart "receiver". The caller can communicate with 7 receivers at the same time. Therefore, the caller and 7 receivers, a total of 8 devices, can be connected into a subnet called piconet (sawtooth network). The receiver in a piconet can be the receiver of more than two piconet at the same time. In July 1999, Bluetooth announced the official specification Bluetooth version 1.0. Mobile phones and laptops that comply with this specification will be available in the market at the end of 1999 or the beginning of 2000. The number of companies that claim to commercialize Bluetooth technology is increasing day by day. Currently, the number of member companies of the Bluetooth standardization group "BluetoothSIG (Special Interest Group)" has increased to more than 800.

The original intention of the design of "Bluetooth" technology is to connect smart mobile phones with laptops, PDAs and various digital information devices without cables, but with a small, low-cost wireless communication technology; thereby forming a network around individuals, so that various information-based mobile and portable devices within its range can seamlessly share resources. According to foreign authoritative organizations, in a few years, there will be hundreds of millions of digital mobile phones, PCs and various information devices around the world that will use wireless interfaces based on Bluetooth technology as a standard configuration. Bluetooth technology will develop rapidly in many fields, and its typical application environments include wireless office environments (wireless office), automobile industry , medical equipment, etc. Bluetooth will play an important role in people's daily life and work, with huge market potential. This technology is becoming an investment hotspot in the 21st century. Bluetooth is a short-range wireless communication technology that replaces data cables. It can support communication between objects. The working frequency band is the globally open 2.4 GHz band. It can transmit data and voice at the same time, and the transmission rate can reach 10 Mbps.

The application of Bluetooth technology is considered to be very extensive and has great potential. It can be used in wireless devices (such as PDAs, mobile phones, smart phones, cordless phones), image processing equipment (cameras, printers, scanners), security products (smart cards, identity recognition, ticket management, security inspections), consumer entertainment (headphones, MP3s, games), automotive products (GPS, ABS, power systems, airbags), household appliances (TVs, refrigerators, electric ovens, microwave ovens, stereos, video recorders), medical fitness, construction, toys and other fields.

Data from IDC predicts that by 2005, 4 billion Bluetooth products will be widely used around mobile devices, desktop devices and other devices around the world.