Bluetooth technology is nothing new,
Many points it can still seem like a topic
Not words, accepted technology. You
However, see ads for Bluetooth enabled devices
You may still wonder what it is.
function
Bluetooth definition is wireless technology
It is a worldwide designation for small forms
Factor, inexpensive solution to provide links
Mobile devices and other electronics
device.
Similar to 802.11b / g wireless and many cordless
Phone system, Bluetooth works with 2.4ghz
It's a wireless signal The 2.4 GHz band seems a bit
Congested, interference between devices and
Hard to avoid a bit. The phone is now offered
Useful in the 5.8ghz frequency band
Cure this.
The technical specifications of Bluetooth
Show maximum move rate of 723 kbps for
Range of 65-328 feet, all by
The class of that particular device. The speed is a
Percentage of provided by wireless standard,
So it's clear that Bluetooth really doesn't
Threatens to exchange wireless networks.
Use
There are many products that take advantage of
laptop with bluetooth capabilities, PDAs,
Headphones, wireless printer adapter.
There are many laptops. On board
Bluetooth adapter enabled by the system
Connect to the Bluetooth device correctly
box. For a computer without an adapter
There are several USB adapters built right
Available for Bluetooth.
Bluetooth is actually for a great technology
It is difficult to compete with For short distance radio,
Bluetooth is easily one of the best. Tsutsu Tsuzuki.
Continued Bluetooth, and more,
Make wireless technology that will be around it
Many years from now
Bluetooth specification
Find multiple specifications for
Well-known Bluetooth:
1. In the United States and Europe,
The frequency range is 2,400-2,483. 5 MHZ, and
79 1 MHz RF (radio frequency) channels. this
Japan's frequency range is with 2,472 to 2,497 MHz
23 1 MHz RF channel.
2. Bluetooth data channels randomly hop 1,600
Time per second between 79 RF channels.
3. Each Bluetooth channel is divided into time
Slots, each with a length of 625 microseconds.
4. Bluetooth piconet up to master's degree
Seven slave masters will be sent by
Time slot, slaves are sent in odd numbers
Time slot
5. Up to 2,745 possible data in a single packet
Length bits.
6. Currently, there are two types of data transfer
Inter-device-SCO (synchronous connection
And ACL (asynchronous connectionless).
7. With Bluetooth piconet, you can stay there
Three SCO links, including 64,000 bits per second
each. To avoid collisions and timing
The problem is that SCO links use reserved
Slots set by the master.
8. The master can support the following SCO links
Either one, two or three slaves.
9. Slots not reserved for SCO links:
Used for ACL links.
10. A single master and slave have one ACL
Link
11 ACL is master to either slave (
Points) or it broadcasts to all slaves.
12 ACL slaves are only sent if
Requested by master. If the master does not
ACL slave does not send when making a request
anything
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