Saturday, 30 May 2015


Bluetooth Signals

Bluetooth  a wireless technology standard, used to allow fixed and mobile devices, the exchange of information between the short distance to form a personal area network (PAN). The use of short-Porter high frequency (UHF) radio waves, via 2.4 and 2.485 GHz ISM band for communication. 1994 by the telecom provider Ericsson developed this technique. It was originally designed in the hope that the establishment of wireless communication alternative versions of a RS-232 data lines. It is possible to link a plurality of devices, to overcome the problem of synchronization.

Bluetooth technology is by the Bluetooth SIG (SIG) is responsible for maintaining the technical standards, the alliance has more than 20,000 member companies, the distribution of its members on the field of telecommunications, computer, network and consumer electronic products. IEEE Bluetooth technology has been standardized as IEEE 802.15.1, but the standard is no longer continued to use.

Bluetooth technology was originally created by Ericsson. Ericsson's technology began in 1994 program, which is the study of low-power between mobile phones and other accessories, low cost method of wireless communication connection. The inventors hope to create a uniform set of rules (ISO protocol) for communications between devices, in order to resolve incompatible between users of mobile electronic devices. 1997 years ago, this concept contact Ericsson mobile device manufacturers, to discuss cooperation in the development of their projects, the results obtained support.
May 20, 1999, Sony Ericsson is easy, IBM, Intel, Nokia and Toshiba and other industry leading the creation of "special interest group" (Special Interest Group, SIG), a precursor of the Bluetooth SIG, the goal is to develop a cost low, high efficiency, the Bluetooth technology standard free wireless connections within a short distance.
Today Bluetooth is managed by the Bluetooth SIG (Bluetooth Special Interest Group, called SIG). Bluetooth technology alliance in the world with more than 25,000 member companies, which are distributed in the telecommunications, computer, networking, and consumer electronics such as multiple fields. IEEE Bluetooth technology as IEEE 802.15.1, but now is no longer to maintain the standard. The Bluetooth SIG oversees the development, management certification program the Bluetooth specification, and maintain trademark rights. Manufacturer's equipment must comply with the Bluetooth SIG standards in order in the name of "Bluetooth devices" into the market. Bluetooth technology has a patent network, issued to compliant devices.