hi hfosjg ithoputjjn tieugjy
Mr. Dinesh Rajpoot
What actually Bluetooth technology is?
- It isn’t some strange form of tooth decay as you might initially imagine. Bluetooth is the name of a technology that is now becoming commercially available. It promises to change significantly the way use machines.
- Bluetooth technology is a wireless short-range communication system introduced to replace the cables connecting portable electronic devices.
- Bluetooth is a developing, world wide, open, short-range radio specification focused on communication between the Internet and Net devices, plus it defines communication protocols between devices and computers.
The objective of this paper is to provide an informative overview about Bluetooth technology, which has in fact already become a global de facto standard for wireless connectivity. In this report we are including the fundamentals of Bluetooth, how it evolved, the architecture, the working, and the technical specifications. Moreover, we are also penning down a few of its advantages and disadvantages from a consumer and provider point of view which further leads on to describing a few of its vast and varied applications. We conclude on the note of what Bluetooth technology presently is and what potential it has in our world and life.
Bluetooth is a global standard for wireless connectivity. Bluetooth technology facilitates the replacement of the cables used to connect one device to another, with one universal short-range radio link operating in the unlicensed 2.45 GHz ISM band. Bluetooth can imitate a universal bridge to attach the
existing data networks, and also as a mechanism for forming ad-hoc networks. Designed to operate in noisy frequency environments, the Bluetooth radio uses a fast acknowledgement and frequency hopping scheme to make the link robust. The main objectives of Bluetooth technology are:
During the past two decades, the advancement in microelectronics and VLSI technology dipped down the cost of many consumer electronic products to a level, which was affordable for the common man. The sale of cellular phones is predicted to reach 1 billion in 2005. With increase in the number of electronic devices, comes in the need of connecting them together for maximum interoperability and utilization. Bluetooth is a technology devised to replace the cables.
Bluetooth can imitate a universal bridge to attach the existing data networks, and also as a mechanism for forming ad-hoc networks. Designed to operate in noisy frequency environments, the Bluetooth radio uses a fast acknowledgement and frequency hopping scheme to make the link robust.At the nominal operating range of 10 meters, Bluetooth creates a 10-meter radius bubble around the mobile phone that instantly connects the Bluetooth Personal Area Network (PAN) to an existing Wide Area Network (WAN) such as TDMA, CDMA, GPRS or GSM. Within the PAN sphere, Bluetooth provides a common wireless transport method for all communication traffic data or voice.A wireless headset handles incoming and outgoing voice calls while a PDA,digital camera, MP3 player and a mobile computer exchange emails, pictures, or music over the web. Bluetooth turns the mobile phone into a communication gateway where information flows freely without boundaries. Outside of the PAN, Bluetooth can be utilized as an Instant Access Point facilitating the means for electronic commerce, personal finance, or data collection.
In 1994, Ericsson in Sweden launched an initiative to study a low-power, low-cost radio interface between mobile phones and their accessories. After three years. In 1997, Ericsson approached various manufacturers of mobile electronic devices to discuss the development and promotion of this short range wireless radio link, as alone this phenomenon could not be implemented.
Blue tooth is a standard developed by a groupof electronics manufacturers that allows anysort of electronic equipment – fromcomputers to cell phones and keyboards toheadphones – to make its own connectionswithout wires, cables or any direct actionfrom the user. The technology encompasses asimple low-cost, low-power, global radiosystem for integration into mobile devices.Such devices can form a quick ad-hoc secure“Piconet” and communicate among theconnected devices. This technology createsmany useful mobile usage models becausethe connections can occur while mobiledevices are being carried in packets andbriefcases (therefore, there are no line-ofsightrestrictions). This paper provides a briefintroduction of Bluetooth technology and itsworking. It also gives some of applications,features and benefits. Finally, theimplementation issues of Bluetoothtechnology are observed.Bluetooth has to receive an overwhelmingsupport of all the digital and computerizedmanufacturers to become a basic unit in aproduction process. Acceptance by thosecompanies outside the SIG will hold back theimplementation of Bluetooth in all devices inthe future.Bluetooth is a radio system designed forconnecting a variety of mobile devices in asecure ad-hoc fashion. The Bluetoothspecification is definitely real and is beingwidely adopted by industry leaders. Thepossibilities for new applications are veryexciting with this versatile technology.
Today wireless communication is one of thefastest growing technologies. One of thepromising technologies for WLAN’s(Wireless Local Area Network) is BLUETOOTH. LAN (Local Area Network)is a computer network designed forconnecting devices in a limited geographicarea such as a building or a campus where asWLAN is a LAN, which uses unguidedmedia (Without using cables or anyconnections). It is used for connectingroaming devices & provides a high-speedbackbone network to enable security.Bluetooth technology was born in 1994.Firstversion was released in July 1999.
WHAT IS BLUETOOTH?
Bluetooth is a name given to the noveltechnology that uses short range, radio link,intended to replace the cables connectingportable and/or fixed communicating devices.Such as mobile phones, desktops, notebookcomputers, cameras, printers, coffee makers,telephones etc.ORBluetooth wireless technology is an openspecification for a low cost, low power, shortrange, radio technologies for ad-hoc wirelesscommunication of voice and data any wherein the world.
THE NAME BLUETOOTH COMESFROM…
Bluetooth is named for Harald Blatand, theking of Denmark who united Denmark andNorway. Blatand translates into Bluetooth inEnglish. The Ericsson Company originallystarted Bluetooth as a project.Similarly, in the beginning of the Bluetoothtechnology era, Bluetooth was aimed atunifying the telecom and computingindustries.
THE REASON WE CAME TOBLUETOOTH…
Let us take an example of telephones forcables where as mobiles are wireless.Because of the problem of interference overcabling we came to Bluetooth technology.This Bluetooth is also a cable replacementtechnology i.e. wireless.
BLUETOOTH IS WIRELESS…
Blue tooth uses Omni-directional radio waveswhich even operate in the unlicensed ISMband at 2.4GHZ that can be transmittedthrough walls and non-metal barriers.Bluetooth uses 1600 times/sec frequencyhopping to avoid interference.
The Bluetooth Special Interest Group (SIG)This group worked together to define andpromote an open, royalty-free specification.This group also defines a certificationprogram for Bluetooth products to ensureproduct compatibility across manufacturers.The Bluetooth SIG includes promotercompanies 3Com, Ericsson, IBM, Intel,Lucent, Microsoft, Motorola, Nokia andToshiba, and more than 2000Adopter/Associate member companies.
Universal short-range (up to 100 mts) radiocommunication standard.Runs at 2.4GHz band, which is nearmicrowave frequency.Performs fast frequency hopping between 79points to avoid interference i.e., 1600times/sec.It is full-duplex.Low power, 32-100mA during sustained datatransmissions between devices. Devicesautomatically switch to power saving mode.Transfers data at 721 Kbps (Kilo Bits PerSecond), which is 3 – 8 times the averagespeed of parallel and serial ports respectively.Bandwidth is wide enough to carry voice anddata signals.300 – 400 Kbps real data rate.
Bluetooth defines two types of networks.
♦ Pico net
♦ Scatter net
It is a small subset of Bluetooth devices thatshare the same physical channel in an ad-hocfashion.Pico net comprises of eight stations in whichonly one serves as master & the rest asslaves.All the slave stations synchronize their clocks& hopping sequence with the master. Anindefinite number of parked devices remainssynchronized with the Pico net but is notactive. A slave in the parked state issynchronized with the master but cannot takeplace in communication until it moves fromparked state to active state.
thnx,for help....it's help me a lot....
The project is very good..................