Tuesday, August 26, 2008 11:52:30 AM
Bluetooth is a high speed, low powered wireless link technology that's designed to connect phones or other portable equipment together with little to no work
required by the user. Unlike infrared, Bluetooth doesn't require line of site positioning to work.
Current prototype circuits are contained on a board that is 0.9 cm square, with a much smaller circuit board being developed.
When one Bluetooth device comes in contact with another, they will automatically exchange addresses and details of capability. Then, they can establish a 1 MB link with security that they will use as required. The protocols involved with handle both data and voice, with a very flexible topography.
The technology achieves its goal by embedding tiny, non expensive short range tranceivers into the devices available today. The radio operates on the 2.45 GHz frequency band, and supports up to 721 KBps, along with three voice channels.
Each devices offers a unique 48 bit address from the IEEE 802 standard, with the connections being point to point or multipoint. The max range is 10 meters, although it can be extended to 100 meters by increasing the power. The devices are also protected from radio interference by changing their frequencies, also known as frequency hopping.
What's important, is the fact that Bluetooth devices won't drain battery life. The specification targets power consumption of the device, limiting the drain on the battery. The radio chip will consume only 0.3mA in stand by mode, which is less than 5% of the power that standard phones use.
Bluetooth will also guarantee security at the bit level. The authentification is controlled by the user via a 128 bit key. The radio signals can be coded with anything up to 128 bit. With the frequency hopping, Bluetooth is already very hard to listen into.
The baseband protocol is a combination of both circuit and packet switches. Slots can be reserved for synchronous packets as well. Each packet will be transmitted in a different hop frequency. Normally, a packet covers a single slot although it can be extended to cover up to five slots.
Bluetooth can also support data channels of up to three simultaneous voice channels. Therefore, it's possible to transfer the data while you talk at the same time. Each individual voice channel will support 64 KB.
From a technical standpoint, Bluetooth is very different indeed. It's the best wireless method in the world, surpassing even infrared. Forcommunication on the go, Bluetooth is indeed very hard to compete with.
Saturday, August 16, 2008 9:34:51 AM
Below, are 10 benefits and reasons to use Bluetooth
As you probably already know, there are many benefits
and advantages to using wireless devices. Along with
improving safety as a result of eliminating wires
you don't need, wireless also offers you plenty of
other advantages. When traveling with your laptop
or other wireless devices, you'll no longer have to
worry about bringing connection cables.
2. Bluetooth is actually inexpensive
The technology of Bluetooth is cheap for companies
to implement, which results in lower costs for the
company. These savings are then passed from the
company on to you.
3. Bluetooth is automatic
Bluetooth doesn't have you set up a connection or
push any buttons. When two or more devices enter
a range of up to 30 feet of each other, they will
automatically begin to communicate without you
having to do anything.
4. Standardized protocol
Bluetooth is standardized wireless, meaning that
a high level of compatibility among devices is
guaranteed. Bluetooth will connect devices to
each other, even if they aren't the same model.
5. Low interference
Bluetooth devices almost always avoid interference
from other wireless devices. Bluetooth uses a
technique known as frequency hopping, and also
low power wireless signals.
6. Low energy consumption
As a result of Bluetooth using low power signals,
the technology requires very little energy and will
use less battery or electrical power as a result.
This is an excellent benefit for mobile devices,
as Bluetooth won't drain the battery.
7. Sharing voice and data
The standard for Bluetooth will allow compatible
devices to share data and voice communications.
This is great for mobile phones and headsets, as
Bluetooth simplifies driving and talking on your
8. Instant PAN (Personal Area Network)
You can connect up to seven Bluetooth devices to
each other within a range of up to 30 feet, forming
a piconet or PAN. For a single room, you can
also set up multiple piconets.
Upgradeable is the standard for Bluetooth. There
are newer versions of Bluetooth in the works,
which offer many new advantages and backward
compatible with older versions.
10. The technology stays
Bluetooth technology is a world wide, universal
wireless standard. With it being as popular as
it is, you can count on it being around for years
to come. As more and more devices start to use
Bluetooth technology, more manufacturers will be
eager to make their products compatible. A chain
reaction will occur, making Bluetooth the standard
for cutting edge wireless.