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Bluetooth is a low-power, short-range wireless connectivity standard, and the term "Bluetooth" is taken from the nickname of a king who unified Denmark in the 10th century, Harald II, or "Bluetooth". The original proponents of Bluetooth technology were five of the world's leading computer and communications companies: Ericsson, IBM, Intel, Nokia, and Toshiba, and in May 1998, the Bluetooth Special Interest Group (SIG) was formed. In May 1998, the Bluetooth Special Interest Group (SIG) was formed, which adopted the strategy of transferring the patented technology to industry at no cost to achieve its goal of a globally harmonized standard.
Its goal is to achieve the highest data transfer speed of 1Mbps (effective transmission speed of 721kbps), the maximum transmission distance of 10 meters, the user does not have to be permitted to use the 2.4GHz ISM (Industrial, Scientific, Medical) band, on which the establishment of 79 channels with a bandwidth of 1MHz, with the frequency of 1,600 switches per second, hobbling (hobbing) method. Hobbing) way of spectrum diffusion technology to realize the sending and receiving of radio waves. This is the origin and characteristics of Bluetooth technology. Devices that communicate using Bluetooth technology are divided into a "calling party" that decides the frequency of the hobbing mode, and its communication counterpart, the "receiving party". The calling party can communicate with 7 receiving parties at the same time. Therefore, it is possible to connect the caller and seven recipients***8 devices into a subnet called Pico (sawtooth network), and the recipients in a Pico can act as recipients of more than two Pico's at the same time. in July 1999, Bluetooth announced its official specification, BluetoothVersion 1.0. cell phones and laptops complying with the specification will be available in late 1999 or early 2000. or early 2000. The number of companies claiming to productize Bluetooth technology is growing, with membership in the Bluetooth standardization group, the BluetoothSIG (Special Interest Group), now numbering more than 800.
"Bluetooth" technology is designed to smart cell phones and laptops, PDAs, and a variety of digitized information devices can no longer use cables, but a small, low-cost wireless communications technology to connect up; and then form a personal side of the network, so that a variety of information technology within the scope of the mobile portable devices can be seamlessly realize the resources **** enjoy. According to foreign authorities expect, a few years later, the world will have hundreds of millions of digital cell phones, PCs and a variety of information equipment will be based on Bluetooth technology wireless interface as a standard configuration. Bluetooth technology will develop rapidly in a variety of fields, and its typical applications include wireless office environments (Wireless Office), the automotive industry, medical equipment, etc. Bluetooth will play an important role in people's daily lives and work, the market potential is huge, the technology is becoming a hot investment in the 21st century.
The so-called Bluetooth (Bluetooth) technology, in fact, is a short-range wireless communication technology, the use of "Bluetooth" technology, can effectively simplify the Pocket PC, laptop computers and cell phones and mobile communication terminal equipment between the communication, but also to successfully simplify the above these devices with the It can also successfully simplify the communication between these devices and the Inter, thus making the data transmission between these modern communication devices and the Internet more rapid and efficient, and widening the way for wireless communication. To put it plainly, it is Bluetooth technology makes modern some easy to carry mobile communication equipment and computer equipment, do not have to resort to cables on the network, and can realize the wireless Internet, and its actual scope of application can also be expanded to a variety of home appliances, consumer electronics and automotive and other information appliances, composed of a huge wireless communication network.