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Bluetooth

The meaning of «bluetooth»

Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances using UHF radio waves in the ISM bands, from 2.402 GHz to 2.48 GHz, and building personal area networks (PANs).[4] It was originally conceived as a wireless alternative to RS-232 data cables. It is mainly used as an alternative to wire connections, to exchange files between nearby portable devices and connect cell phones and music players with wireless headphones. In the most widely used mode, transmission power is limited to 2.5 milliwatts, giving it a very short range of up to 10 meters (30 feet).

Bluetooth is managed by the Bluetooth Special Interest Group (SIG), which has more than 35,000 member companies in the areas of telecommunication, computing, networking, and consumer electronics. The IEEE standardized Bluetooth as IEEE 802.15.1, but no longer maintains the standard. The Bluetooth SIG oversees development of the specification, manages the qualification program, and protects the trademarks.[5] A manufacturer must meet Bluetooth SIG standards to market it as a Bluetooth device.[6] A network of patents apply to the technology, which are licensed to individual qualifying devices. As of 2009[update], Bluetooth integrated circuit chips ship approximately 920 million units annually.[7]

The name “Bluetooth” was proposed in 1997 by Jim Kardach of Intel. At the time of this proposal, he was reading Frans G. Bengtsson's historical novel The Long Ships about Vikings and the 10th-century Danish king Harald Bluetooth.[8][9]

Bluetooth is the Anglicised version of the Scandinavian Blåtand/Blåtann (or in Old Norse blátǫnn). It was the epithet of King Harald Bluetooth who united disparate Danish tribes into a single kingdom, the implication being that Bluetooth unites communication protocols.[10]

The Bluetooth logo is a bind rune merging the Younger Futhark runes  (ᚼ, Hagall) and  (ᛒ, Bjarkan), Harald's initials.[11][12]

The development of the "short-link" radio technology, later named Bluetooth, was initiated in 1989 by Nils Rydbeck, CTO at Ericsson Mobile in Lund, Sweden. The purpose was to develop wireless headsets, according to two inventions by Johan Ullman, .mw-parser-output .citation{word-wrap:break-word}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}SE 8902098-6, issued 1989-06-12  and SE 9202239, issued 1992-07-24 . Nils Rydbeck tasked Tord Wingren with specifying and Dutchman Jaap Haartsen and Sven Mattisson with developing. Both were working for Ericsson in Lund.[13] In 1990, Jaap Haartsen was nominated by the European Patent Office for the European Inventor Award.[14] From 1997 Örjan Johansson became the project leader and propelled the technology and standardization.[15][16][17][18]

Related Searches

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