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Khoảng cách này có thể được tăng lên đến 100 mét bằng cách khuếch đại sức mạnh để 20dBm. Hệ thống Bluetooth vô tuyến điện được tối ưu hóa cho di động. Bluetooth tên được sinh ra từ các vua thế kỷ thứ 10 của Đan Mạch, vua Harold Blaatand (họ đôi khi là bằng văn bản như Bluetooh), | OVERVIEW OF MOBILE COMMUNICATION 23 This distance can be increased to 100 meters by amplifying the power to 20dBm. The Bluetooth radio system is optimized for mobility. The name Bluetooth was born from the 10th century king of Denmark King Harold Blaatand whose surname is sometimes written as Bluetooh who engaged in diplomacy which led warring parties to negotiate with each other. The inventors of the Bluetooth technology thought this a fitting name for their technology which allowed different devices to talk to each other. The Bluetooth specification was first developed by Ericsson now Sony Ericsson and was later formalized by the Bluetooth Special Interest Group SIG . The SIG was formally announced on May 20 1999. It was established by Sony Ericsson IBM Intel Toshiba and Nokia and later joined by many other companies as Associate or Adopter members. Bluetooth technology already plays a part in the rising Voice over IP VOIP scene with Bluetooth headsets being used as wireless extensions to the PC audio system. As VOIP becomes more popular and more suitable for general home or office users than wired phone lines Bluetooth may be used in Cordless handsets with a base station connected to the Internet link. In March 2006 the Bluetooth Special Interest Group SIG announced its intent to work with UWB ultra-wideband manufacturers to develop a next-generation Bluetooth technology using UWB technology and delivering UWB speeds. This will enable Bluetooth technology to be used to deliver high speed network data exchange rates required for wireless VOIP music and video applications. The IEEE 802.15.3 High Rate Task Group TG3 for WpAns is chartered to draft and publish a new standard for high-rate 20Mbit s or greater WPANs. Besides a high data rate the new standard will provide for low power low cost solutions addressing the needs of portable consumer digital imaging and multimedia applications. Another member of 802.15 family is the IEEE 802.15 High Rate Alternative PHY .
