Bluetooth is one of the old technology still in use today. Bluetooth is a technology that replaces itself infrared technology that is quite troublesome when using it. More complete understanding of wireless technology which is used to transfer data over short distances using radio transmissions (2400-2480 MHz). Able to create a Bluetooth Personal Area Network (PAN), which has a high level of security through a mobile device. Wireless device technology was first invented by Ericsson in 1994. Bluetooth technology was originally used as an alternative to one of the cable connectors. However, ultimately because they are more developed Bluetooth teknilogi ability to connect to multiple devices at once.
Today, Bluetooth technology is managed by a body known as the Bluetooth Special Interest Group (SIG) Group which was established May 20, 1998 it has more than 17,000 members from all business direction (computers, telecommunications, networking, and consumer electronics). Bluetooth SIG oversees the development and set standards for the use of its trademark protect. Bluetooth itself comes from Scandinavia, Blatand / Blatann. The nickname for King Harald I of Denmark and parts of Norway who unites tribes Denmark into a single kingdom. This idea was proposed by Jim Kardach, one of the developers who participate in developing this technology. Taking the name Bluetooth is approved because of the implications of the same, in this case bringing together between mobile phone and computer.
Use of Bluetooth
Currently, Bluetooth is used only as a medium of data transmission. Some devices such as speakers, watches, TV, gaming console, PC, and others are using this technology as one of its main features to connect with smartphone devices. Bluetooth functions we use most often is the A2DP (Advanced Audio Distribution Profile). This technology allows high quality audio data penyeluruh (stereo ataumono) via a Bluetooth connection. A2DP is designed to deliver uni-directional audio sreaming steaming quality audio with 2-channel stereo quality of an MP3 player to a headset or car audio. The use of this technology supports streaming audio with MPEG-1, MPEG-2, MPEG-4, AAC and ATRAC as well as several other codecs. Just info, A2DP technology to be one of the most widely in use today.
The development version of the Bluetooth
Bluetooth that we know today does have a lot of versions. The initial version that appears is v1.0 and v1.0B. An earlier version was a failure because the devices and technologies that have not been so widely used.
Bluetooth version 1.1 and 1.2
Bluetooth v1.1 showed improvement with standerd ratified as IEEE standard 802.15.1-2002, this version also brings some shortcomings still the previous version. Finally, successful version Bluetooth technology is found in v1.2. This version has compatibility with previous technology with a speed of 721 kbit / s. The development does not stop the Bluetooth v2.0 + EDR introduced in 2004. This version uses technology Enhanced Data Rate (EDR) for faster data transfer. EDR supports data transfer speeds of up to 3 Mbit / s, although in practice there are only 2.1 speeds Mbit / s.
Version 2.1 + EDR
Three years after the release of v2.0 + EDR. Bluetooth SIG announces Bluetooth v2.1 + EDR supports full compatibility to previous versions. In this version of Secure Simple Pairing technology introduced (CNS) that increases the ability of sending and receiving signals between devices. Version 2.1 also introduced the Extended Inquiry Response (EIR), which provide more information before pairing to other devices. This technology enables better filtering so as to conserve power usage.
Version 3.0 + HS
Bluetooth v3.0 + HS was introduced on 21 April 2009 which provides speeds up to 24 Mbit / s. In this version of the Bluetooth link hanyadigunakan for pairing and formation data access point, while sending and receiving data using 802.11 wireless link (as well as Wi-Fi). The main features of the new version is the Alternate MAC / PHY (AMP), which provides support link 802.11 for faster data transfer. “HS” on this version be an acronym for High Speed through the use of link 802.11.
Technology with low power usage to be one of the major languages in the next year. Bluetooth Low Energy (BLE) are the results obtained, and finally gave birth to Bluetooth v4.0. Small power consumption, longer usage time, low production costs, greater range and transfer speeds of up to 1 Mbit / s into the flagship’s Bluetooth v4.0. BLE is not used at all because it’s a device by Bluetooth V4.0 Dual Mode technology, which enable two types of wireless. Classic Bluetooth wireless connection which is still widely used in existing devices and BLE as the new standard uses a wireless connection.