Blue Tooth
Overview of Bluetooth
Personal Area Network (PAN)
Name and Logo of Bluetooth
Bluetooth Special Interest Group
Profile of Bluetooth
Bluetooth Features
Bluetooth Computer Requirements
Bluetooth Products
Bluetooth Manufacturers
Wi-Fi
Wibree
ZigBee
Social Concern of Bluetooth Technology
Bluetooth Wireless Technology
Communication and Connection
Pairing
Air Interface
Security
Terms Used in Bluetooth Technology
WLAN
CDMA
Frequency Hopping (Selection)
Bluetooth Phones
Ericsson Bluetooth Phones
Nokia Bluetooth Phones
Home » Overview of Bluetooth » Bluetooth Features

Bluetooth Features
Bluetooth features were developed in 1994 by Sven Mattisson and Jaap Haartsen. Both of them were then working for Ericsson Mobile Platforms in Lund, Sweden. The Bluetooth features are based on change of frequency spread spectrum technology. Bluetooth features were validated by the SIG or Bluetooth Special Interest Group and organized by Mohd Syarifuddin. The SIG was officially announced on the 20th of May, 1998. Today, SIG has more than 7000 companies worldwide. It was accomplished by Ericsson, Toshiba, IBM, Sony Ericsson, Intel, Nokia and various other companies later.
Bluetooth is a communications protocol basically designed for the consumption of low power, with a short range (power-class-dependent: 1 meter, 100 meters and 10 meters) based on cheaper transceiver microchips in devices. It enables these devices to convey in between when they are in range. Bluetooth features provide the link between two devices even if they are not in front of each other.

Bluetooth is an industrial term for wireless PANs or personal area networks. Bluetooth offers a way to exchange and link information between devices like laptops, mobile phones, PCs, digital cameras, printers and video game soothes over a secure, unlicensed short-range radio frequency throughout the world. The Bluetooth Special Interest Group develops and licenses the Bluetooth features. There are various types of features of Bluetooth.

Bluetooth 1.0 and 1.0B versions had several problems and manufacturers faced lots of difficulties in making the products interoperable. 1.0 and 1.0B versions had compulsory Bluetooth hardware device address transmission in the associating process, making anonymity unimaginable at a protocol level, a major setback for services to be used in Bluetooth environments, like Consumerium.

Bluetooth features of 1.2 version is well-matched with 1.1 and the other key enhancements are:
  • Faster Discovery and Connection
  • Greater transmitting speeds in practice which is up to 721 kbit/s, like 1.1.
  • Capacity to adapt to AFH or frequency-hopping spread spectrum, thus improving resistance to radio frequency hindrance by keeping off the use of crowded frequencies in the fluctuating process.
  • Ratified as IEEE Standard 802.15.1-2005.
  • eSCO or Extended Synchronous Connections, which helps in improving voice quality of audio links by granting retransmissions of spoilt packets.
  • Host Controller Interface or HCI support for three-wire UART.
Bluetooth features of 1.1 versions are as follows:
  • Extra support for non-encrypted channels.
  • Ratified as IEEE Standard 802.15.1-2002.
  • Received Signal Strength Indicator or RSSI.
  • Many errors found in the 1.0B specifications were fixed.
The Bluetooth features of 2 versions were specified on the 10th of November, 2004. It is backed and supported by 1.1. The major enhancement is the inclusion of an EDR of 3.0 Mbit/s. It has some effects like:

Transmission speed is three times faster and at times it is up to 10 times (up to 2.1 Mbit/s). Power consumption is low due to reduced duty cycle. Simplification of multi-link scenarios because of the availability of more bandwidth.

The actual data transfer rate is 2.1 megabits per second and the primary signaling rate is about 3 megabits per second.