Wireless Armenia

Bluetooth has a small area for  networking  to another side  by eliminating the need for user intervention and to maintain an extremely low power to conserve battery power. Imagine that you are on your Bluetooth-enabled cell phone, standing next the door of  your house. You say the man at the other side  to call you back after  five minutes, so you can go in your house  and put your things away. While  you enter to your house the map that you received on your mobile from your car’s Bluetooth-enabled GPS system is automatically sent to your  Bluetooth-enabled computer, because your mobile  has already  taken  the Bluetooth signal from your computer and automatically sent the data that you intended for  transfer . After five minutes, when your friend again calls you, your Bluetooth-enabled home phone rings instead of your mobile .The  person called the same number  by the same number, but your home phone picked up Bluetooth signals from mobile and automatically redirects the call, because it  knew   that you are  at home. And each transmission signal to your mobile  and from your mobile phone consumes just 1 MW of power, so that your mobile phone charge is virtually independent of all this activity.

From the beginning, Bluetooth is a networking standard that works on two levels:
• Ensures 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 transmitted, how many will be sent at a time, and as part of a conversation can be sure that the message is the same as the message sent.
The biggest advantage of Bluetooth is  that it is wireless, inexpensive and automatic. There are other ways to get around using wires, including infrared. Infrared (IR) refers to light waves of low frequency than human eyes can receive and interpret. Infrared is used in most remote control systems. Infrared communications are fairly reliable and do not cost a lot to be built into the device, but there are a couple of drawbacks. First, infrared is a “line of sight” technology. For example, you must specify the remote at the TV or DVD player to make things happen. A second drawback is that infrared is almost always “one to one” technology. You can transfer data between your desktop and laptop, but not  your laptop and PDA at the same time. (See how remote control works for  learning  more about infrared link.)
These two qualities of infrared are actually advantageous in some things. Because infrared transmitters and receivers must be aligned with each other, interference between devices is uncommon. Of course  nature of infrared communications is useful in that you can be sure that the message goes only to the recipient, even in a room full of infrared receivers.
Bluetooth is designed to circumvent the problems that comes  with infrared systems. Older Bluetooth 1.0 standard maximum transmission rate of 1 MB 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-network works.
Why is it called Bluetooth?
Harald Bluetooth was king of Denmark at the end of 900. He succeed  to unite Denmark and part of Norway into one kingdom then  disseminated Christianity in  Denmark. He left a large monument, Jelling rune stone, in memory of his parents. He was killed in 986 during a battle with his son, Svend Forkbeard. The choice of this name for the standard indicates how important companies from Scandinavia (countries, including Denmark, Sweden, Norway and Finland) have the communications industry, even though he says little about how the technology works.