How does bluetooth work?

Answer 1

The Bluetooth Solution
Bluetooth takes small-area networking to the next level by removing the need for user intervention and keeping transmission power extremely low to save battery power. Picture this: You're on your Bluetooth-enabled cell phone, standing outside the door to your house. You tell the person on the other end of the line to call you back in five minutes so you can get in the house and put your stuff away. As soon as you walk in the house, the map you received on your cell phone from your car's Bluetooth-enabled GPS system is automatically sent to your Bluetooth-enabled computer, because your cell phone picked up a Bluetooth signal from your PC and automatically sent the data you designated for transfer. Five minutes later, when your friend calls you back, your Bluetooth-enabled home phone rings instead of your cell phone. The person called the same number, but your home phone picked up the Bluetooth signal from your cell phone and automatically re-routed the call because it realized you were home. And each transmission signal to and from your cell phone consumes just 1 milliwatt of power, so your cell phone charge is virtually unaffected by all of this activity.

Bluetooth is essentially a networking standard that works at two levels:

It provides agreement at the physical level -- Bluetooth is a radio-frequency standard.

It provides agreement at the protocol level, where products have to agree on when bits are sent, how many will be sent at a time, and how the parties in a conversation can be sure that the message received is the same as the message sent.

Photo courtesy Bluetooth SIG
Bluetooth wireless PC card



The big draws of Bluetooth are that it is wireless, inexpensive and automatic. There are other ways to get around using wires, including infrared communication. Infrared (IR) refers to light waves of a lower frequency than human eyes can receive and interpret. Infrared is used in most television remote control systems. Infrared communications are fairly reliable and don't cost very much to build into a device, but there are a couple of drawbacks. First, infrared is a "line of sight" technology. For example, you have to point the remote control at the television or DVD player to make things happen. The second drawback is that infrared is almost always a "one to one" technology. You can send data between your desktop computer and your laptop computer, but not your laptop computer and your PDA at the same time. (See How Remote Controls Works to learn more about infrared communication.)

These two qualities of infrared are actually advantageous in some regards. Because infrared transmitters and receivers have to be lined up with each other, interference between devices is uncommon. The one-to-one nature of infrared communications is useful in that you can make sure a message goes only to the intended recipient, even in a room full of infrared receivers.

Bluetooth is intended to get around the problems that come with infrared systems. The older Bluetooth 1.0 standard has a maximum transfer speed of 1 megabit per second (Mbps), while Bluetooth 2.0 can manage up to 3 Mbps. Bluetooth 2.0 is backward compatible with 1.0 devices.

Let's find out how Bluetooth networking works.

Why is it called Bluetooth?
Harald Bluetooth was king of Denmark in the late 900s. He managed to unite Denmark and part of Norway into a single kingdom then introduced Christianity into Denmark. He left a large monument, the Jelling rune stone, in memory of his parents. He was killed in 986 during a battle with his son, Svend Forkbeard. Choosing this name for the standard indicates how important companies from the Nordic region (nations including Denmark, Sweden, Norway and Finland) are to the communications industry, even if it says little about the way the technology works.

Answer 2

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Answer 3

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Answer 4

magic..

Answer 5

Well See The Energy Go's In To the narrative, like a Magnit.
Whitch Equals investing Time, Active production of physical Grammer.
See investments Is the Word Whitch means: a speech sound considered as a physical event without regard to its place in the sound system of a language, Or A Connection Of a portable usually cordless telephone for use in a cellular system.

to speak in a loud distinct voice so as to be heard at a distance, to make a request or demand , of an animal : to utter a characteristic note or cry d : to get or try to get into communication by telephone -- often used with up e : to make a demand in card games (as for a particular card or for a show of hands) f : to give the calls for a square dance
to make a brief visit

to utter in a loud distinct voice -- often used with out to announce or read loudly or authoritatively : to announce the play-by-play of (as a football game) b : to command or request to come or be present : to cause to come : BRING c : to summon to a particular activity, employment, or office to invite or command to meet : CONVOKE e : to rouse from sleep or summon to get up f : to give the order for : bring into action : to manage by giving the signals or orders g : to make a demand in bridge for (a card or suit) : to require (a player) to show the hand in poker by making an equal bet : to challenge to make good on a statement to charge with or censure for an offense h : to attract (as game) by imitating the characteristic cry i : to halt (as a baseball game) because of unsuitable conditions j : to rule on the status of (as a pitched ball or a player's action) k : to give the calls for (a square dance) -- often used with off l : to demand payment of especially by formal notice : to demand presentation of (as a bond or option) for redemption m to get or try to get in communication with by telephone : to generate signals for (a telephone number) in order to reach the party to whom the number is assigned : to make a signal to in order to transmit a message
2 a : to speak of or address by a specified name : give a name to : to regard or characterize as of a certain kind : CONSIDER : to estimate or consider for purposes of an estimate or for convenience c : to describe correctly in advance of or without knowledge of the event : PREDICT to name or specify in advance
to temporarily transfer control of computer processing to (as a subroutine or procedure)
synonym see SUMMON
- call a spade a spade
1 : to call a thing by its right name however coarse
2 : to speak frankly
- call for
1 : to call (as at one's house) to get
2 : to require as necessary or appropriate
- call forth : ELICIT, EVOKE
- call in question or call into question : to cast doubt upon
- call it a day : to stop for the remainder of the day or for the present whatever one has been doing
- call it quits : to call it a day : QUIT
- call names : to address or speak of a person or thing contemptuously or offensively
- call on
1 : to call upon
2 : to elicit a response from (as a student)
- call one's bluff : to challenge in order to expose an empty pretense or threat
- call the shots : to be in charge or control : determine the policy or procedure
- call the tune : to call the shots
- call time : to ask for or grant a time-out
- call to account : to hold responsible : REPRIMAND
- call upon...

the communication or reception of knowledge or intelligence, the communication or reception of knowledge or intelligence
2 a knowledge obtained from investigation, study, or instruction INTELLIGENCE, NEWS FACTS, DATA b : the attribute inherent in and communicated by one of two or more alternative sequences or arrangements of something (as nucleotides in DNA or binary digits in a computer program) that produce specific effects c a signal or character (as in a communication system or computer) representing data (something (as a message, experimental data, or a picture) which justifies change in a construct (as a plan or theory) that represents physical or mental experience or another construct a quantitative measure of the content of information; specifically : a numerical quantity that measures the uncertainty in the outcome of an experiment to be performed
the act of informing against a person
a formal accusation of a crime made by a prosecuting officer as distinguished from an indictment presented by a grand jury..

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