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Q.

Whats the function of a blue tooth

Tags: health, science, technology
Asked by sukh, 24 Mar '10 05:34 pm
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Answers (3)

1.

Bluetooth is a proprietary open wireless protocol for exchanging data over short distances (using short length radio waves) from fixed and mobile devices, creating personal area networks (PANs). It was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of synchronization.Bluetooth uses a radio technology called frequency-hopping spread spectrum, which chops up the data being sent and transmits chunks of it on up to 79 bands of 1 MHz width in the range 2402-2480 MHz. This is in the globally unlicensed Industrial, Scientific and Medical (ISM) 2.4 GHz short-range radio frequency band.
In its basic rate (BR) mode, the modulation is Gaussian frequency-shift keying (GFSK). It can achieve a gross data rate of 1 Mbit/s. In extended data rate (EDR) /4-DQPSK and 8DPSK are used, giving 2, and 3 Mbit/s respectively.
Bluetooth is a packet-based protocol with a master-slave structure. One master may communicate with up to 7 sla ...more
Answered by Josna, 24 Mar '10 05:36 pm

 
  
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2.

The art of connecting things is becoming more and more complex every day. In this article, we will look at a method of connecting devices, called Bluetooth, that can streamline the process. A Bluetooth connection is wireless and automatic, and it has a number of interesting features that can simplify our daily lives.
When any two devices need to talk to each other, they have to agree on a number of points before the conversation can begin. The first point of agreement is physical: Will they talk over wires, or through some form of wireless signals? If they use wires, how many are required -- one, two, eight, 25? Once the physical attributes are decided, several more questions arise:

* How much data will be sent at a time? For instance, serial ports send data 1 bit at a time, while parallel ports send several bits at once.

* How will they speak to each other? All of the parties in an electronic discussion need to know what the bits mean and whether the message they recei ...more
Answered by saranathan Narasimhan, 25 Mar '10 04:38 pm

 
  
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3.

Bluetooth is the service provided in the mobile phone the data transfer from mobile to mobile to a certain distance.
Answered by shweta, 24 Mar '10 05:43 pm

 
  
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