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"Bluetooth" technology is not far away from us

Source:   Author:   Time:2013-10-23 15:12:11

"Bluetooth" technology for the wireless connection of personal business between mobile devices, allows users to quickly and easily communicate with its own surrounding electronic equipment cable connection, such as computers, printers, scanners,fax machines and other mobile equipment, network access and communication easier. As the final form of the "Bluetooth" is on the basis of the existing wired network, complete the wireless network of the building (including personal area network). , The network will no longer subject to the constraints of geographical and line, but the real players online at any time and information exchange in order to establish an all-wireless office environment.

 

"Bluetooth" is an extremely advanced, large-capacity short-range wireless digital communications technical standards, and its goal is to achieve the maximum data transmission speed of 1Mbps (the effective transmission speed of 721Kbps), the maximum transmission distance of 10 cm to 10 m, by increasing the launchpower up to 100 meters. Transceiver having to go through the application can use the 2.4GHz ISM (Industrial, Scientific, Medical) band, set up on the 79-band channels of 1MHz switching frequency of 1,600 times per second, hobbing way Spread Spectrum technology to achieve the radio transceiver.

 

Constitute the so-called "Bluetooth piconet (piconet) using Bluetooth technology devices and equipment within the other seven, shared 1Mbps bandwidth, and a Bluetooth device while adding eight different micro-network, eachsubnets of the transmission bandwidth of 1Mbps. Operation of two or more devices sharing a channel form a piconet, by which a device-oriented traffic. The same time each device can belong to different piconets, Bluetooth devices can be network interconnection with each other to pass information. When the device is not the "Bluetooth" micro-network, it will enter standby mode, in this state, ready to listen to paging messages, and will start their own until the received signal with own ID, and call the linking process , followed by the identification code recognition and signal time synchronization, in order to determine the next frequency hopping in order to establish a micro-network. In such a micro-network, the user will no longer be the shackles of all kinds of cables, can easily have a valuable personalized space, easy to enjoy the fun of unlimited freedom. Of course, as the technology of wireless communication, Bluetooth is not the only technology in comparison with several other wireless connectivity Bluetooth transmission speed is not the fastest, but it has the advantage of more: "Bluetooth" can send audio and video data, while others can not. In addition, "Bluetooth" is not only penetrate the object transmission, and does not align the direction of transfer of the data receiver module, infrared transmission can not be done. For mobile devices, "Bluetooth" with obvious advantages. "Bluetooth" biggest advantage lies in updating the network backbone, with the "Bluetooth" architecture, the cost of using the network as a whole is certainly lower than laying cable. With the Bluetooth device miniaturization and cost reduction, "Bluetooth" will have broad application prospects.

 

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