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Bluetooth-Technology Articles

Bluetooth Technology Intro

(category: Bluetooth-Technology, Word count: 310)
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The technology of Bluetooth is nothing new, but in

many respects it can still seem like more of a buzz

word rather than an accepted technology. You may

see the ads for Bluetooth enabled devices, although

you still may be wondering what it is.


The Bluetooth definition is a wireless technology

that is a worldwide specification for a small form

factor, low cost solution that will provide link

between mobile devices and other electronic


Similiar to 802.11 b/g wireless and many cordless

telephone systems, Bluetooth operates on 2.4 GHz

radio signals. The 2.4 GHz band seems to be a bit

crowded, with interferences between the devices a

bit hard to avoid. Telephones are now being offered

at the 5.8 GHz frequency band, which will help to

remedy this.

The technical specifications of Bluetooth will

indicate a maximum transfer rate of 723 kbps with

a range of 65 - 328 feet, all depending on the

class of that particular device. The speed is a

fraction of what is offered by wireless standards,

so it's obvious that Bluetooth doesn't really

pose a threat to replacing your wireless network.


There are numerous products that will take advantage

of Bluetooth capabilities, such as laptops, PDAs,

headphones, and even wireless printer adapters.

A lot of laptops out there will include an onboard

Bluetooth adapter which allows the system to

connect to any Bluetooth device right out of the

box. For computers that don't have an adaptor

built right in, there are several USB adaptors

available for Bluetooth.

For an awesome technology, Bluetooth is actually

hard to compete with. For short range wireless,

Bluetooth is easily one of the best. The standard

for Bluetooth keeps getting better and better,

making it a wireless technology that will be around

for years and years to come.

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Bluetooth Basics

(category: Bluetooth-Technology, Word count: 299)
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The technology of Bluetooth wireless is a short

range communications method intended to replace

the cables that connect portable or fixed devices

while maintaining the highest levels of security.

The key features offered by Bluetooth include

low power and low cost. The specification in

Bluetooth defines a uniform structure for a wide

range of devices to communicate and connect with

one another.

The technology behind Bluetooth has achieved

global satisfaction such as enabled devices, almost

everywhere in the world. Bluetooth devices will

connect and communicate without wires through

short range and networks known as piconets.

Each device will simultaneously communicate with

up to seven other devices within a single piconet,

meaning that each device can also belong to

several piconets simultaneously. The piconets

are dynamically established as Bluetooth enabled

devices enter and leave the proximity of radio.

A fundamental to Bluetooth strength is the

ability to handle both data and voice transmissions

simultaneously. This will enable users to enjoy

varieties of innovative solutions such as hands

free talking, printing and fax capabilities,

and other applications.


Unlike other standards of wireless, the Bluetooth

specification gives product developers both a

link layer and application layer definitions,

which will help support data and voice applications.


The Bluetooth technology operates in the industrial

and scientific band at 2.4 to 2.485 GHz, using a

spread spectrum, frequency hopping signal.


The adaptive frequency hopping of Bluetooth

technology was designed to reduce interference

between wireless technologies that share the 2.4

GHz spectrum. Adaptive frequency hopping (AFH)

works well within the spectrum to take full

advantage of the frequency available.

AFH hopping allows for more efficient transmission

within the spectrum, which provides users with

greater performance even if they are using other

technologies along with Bluetooth.

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Bluetooth Specifications

(category: Bluetooth-Technology, Word count: 286)
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Below, you'll find several specifications for the

well known Bluetooth:

1. Throughout the United States and even Europe,

the range of frequency is 2,400 - 2,483.5 MHZ, with

79 1-MHz RF (radio frequency) channels. The

frequency range in Japan is 2,472 to 2,497 MHz with

23 1-MHz RF channels.

2. A data channel of Bluetooth randomly hops 1,600

times per second between the 79 RF channels.

3. Each Bluetooth channel is divided into time

slots, with each one being 625 microseconds long.

4. A Bluetooth piconet has one master and up to

seven slaves. The master will transmit in even

time slots, while the slaves will transmit in odd

time slots.

5. The data in a single packet can be up to 2,745

bits in length.

6. Currently, there are two types of data transfer

between devices - SCO (synchronous connection

oriented) and ACL (asynchronous connectionless).

7. In a Bluetooth piconet, there can be up to

three SCO links containing 64,000 bits per second

with each one. To help avoid collision and timing

problems, the links of the SCO will use reserved

slots set up by the master.

8. A master can support up to three SCO links

with either one, two, or even three slaves.

9. The slots not reserved for the SCO links can

be used for ACL links.

10. A single master and slave can have one ACL


11. ACL is either master to one slave (point to

point) or it broadcasts to all of the slaves.

12. The ACL slaves will only transmit when it has

been requested by the master. If the master doesn't

make the request, the ACL slaves won't transmit

anything at all.

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Bluetooth Security

(category: Bluetooth-Technology, Word count: 420)
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These days, all communication technology faces the

issue of privacy and identity theft, with Bluetooth

being no exception. Almost everyone knows that email

services and networks require security. What users

of Bluetooth need to realize is that Bluetooth also

requires security measures as well.

The good news for Bluetooth users is that the

security scares, like most scares, are normally over

dramatized and blown entirely out of proportion. The

truth being told, these issues are easy to manage,

with various measures already in place to provide

security for Bluetooth technology.

It's true that there has been some Bluetooth phones

that have been hacked into. Most devices that are

hacked into are normally those that don't have any

type of security at all.

According to Bluetooth specialists, in order to hack

into a Bluetooth device, the hacker must:

1. Force two paired devices to break their


2. Steal the packets that are used to

resend the pin.

3. Decode the pin.

Of course, the hacker must also be within range of

the device, and using very expensive developer type

equipment. Most specialists recommend that you

have a longer pin, with 8 digits being recommended.

Fundamentals of security

The "pairing process" is one of the most basic levels

of security for Bluetooth devices. Pairing, is

two or more Bluetooth devices that recognize each

other by the profiles they share - in most cases

they both must enter the same pin.

The core specifications for Bluetooth use an

encryption algorithm, which is completely and entirely

secure. Once the devices pair with each other,

they too become entirely secure.

Until they have successfully paired, the Bluetooth

devices won't communicate with each other. Due to

this pairing process and the fact that it is short

range - Bluetooth technology is considered to be


As the news has indicated, experienced hackers

have developed ways to get around this level of

basic security. There are ways to get around this

threat, as you can install software to prevent

hackers from getting in.

With Bluetooth becoming more and more popular, it's

really no wonder that security is always in

question. As Bluetooth gets bigger and better,

security will always be something that no one

really takes lightly.

If you've been concerned about Bluetooth security

in the past, rest assured that newer devices will

offer bigger and better security. Preventing

hackers from getting in is something every owner

is concerned about - and the manufacturer's are

very aware.

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Bluetooth Applications

(category: Bluetooth-Technology, Word count: 312)
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With Bluetooth being very popular with wireless, it's

no wonder there are many applications available for

the technology. Below, you'll find the applications

for Bluetooth.

1. Wireless networking between laptops and desktop

computers, or desktops that are in a confined space

and little bandwidth is needed.

2. Peripherals such as mice, keyboards, and printers.

3. Cell phones with Bluetooth technology have been

sold in large numbers, as they are able to connect to

computers, PDAs (Personal Data Assistant), and various

other devices. The standard also includes the

support for more powerful and longer range devices.

4. The transfer of files, images and MP3, between

mobile phones.

5. Certain MP3 players and digital cameras to

transfer files to and from computers.

6. Bluetooth technology headsets for smart phones

and cell phones.

7. Data logging equipment that transmits data to

a computer via Bluetooth technology.

8. Sony Playstation 3 and Nintendo Revolution will

both use Bluetooth technology for their wireless


For Bluetooth, there are literally hundreds of

different applications and devices available for you

to use or purchase. As you may already know,

Bluetooth is the most popular wireless technology

in the world. It's very reliable, very dependable,

and very hard to crack into.

There are many other applications for Bluetooth in

development now, many of which plan to take the

wireless age to the next level. Video game systems

are using Bluetooth technology as well, for their

wireless controllers. This is great news for gaming

fans, as Bluetooth offers the best in wireless

data transmission.

If your curious about applications for Bluetooth

that are still in development, you can search on

the internet. You can find all sorts of information,

especially when it comes to Bluetooth. As the

future arrives, you can expect Bluetooth to bring

bigger and better things.

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Bluetooth Wireless Networking

(category: Bluetooth-Technology, Word count: 291)
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Bluetooth technology offers three different types

of defined ranges, based on output ranges. Class

1 devices are the most powerful, as they can have

up to 100 mW of power, with a regular antenna

giving them a range of around 130 - 330 feet.

The class 2 devices are lower power, offering up

to 2.5 mW of power. A regular antenna will give

them a range of around 50 - 100 feet. Class 3

devices use even less power, up to 1 mW of power

to be exact. With a regular antenna, they will

have a range of around 16 - 33 feet.

Even though you may not realize it, Bluetooth

wireless technology has never been intended for

anything other than short distance types of

communication. With Bluetooth wireless, the short

range is actually a benefit.

For one, the short range will reduce the change of

interference between your devices and those that

belong to others who are nearby. Overall, this

is a basic type of security, designed to protect

you and your devices.

Secondly, the lower power used for short range

means a longer battery life. Most Bluetooth

devices will get their power from a battery,

meaning that anything you can do to lengthen the

battery life is very important.

The wireless networking offered by Bluetooth is

actually among the best, even though it uses

short range communication. Bluetooth is used

with wireless controllers, the internet, and

even wireless headsets.

For the best in short range technology, Bluetooth

is extremely hard to beat. If you've never tried

Bluetooth before, now is the time. It's the best

with wireless networking, especially for those

who enjoy hands free talking on their cell phone.

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Bluetooth Definition

(category: Bluetooth-Technology, Word count: 301)
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Bluetooth is a specification for the use of low

power radio communications to wireless phones,

computers, and other network wireless devices over

short distances. The name Bluetooth is actually

borrowed from Harald Bluetooth, a Denmark king

more than 1,000 years ago.

The technology of Bluetooth was primarily designed

to support simple wireless networking of devices

and peripherals, which includes cell phones, PDAs,

and wireless headsets. The wireless signals that

are transmitted by Bluetooth cover short distances

of up to 30 feet, generally communicating less

than 1 MPps (Mega Byte per second).

The networks of Bluetooth feature dynamic topology

called PAN or a piconet. The piconets contain a

minumum of two and a maximum of eight peer devices.

The devices will communicate using protocols that

are part of the specification.

Even though the Bluetooth standard will utilize

the same 2.4 GHz range as 802.11b and 802.11g,

the technology isn't suitable for a Wi-Fi

replacement. When compared to Wi-Fi, Bluetooth

is much slower, limited in range, and actually

supports less devices.

For short range devices, Bluetooth is rapidly

becoming the best. The technology is more popular

with cell phones, as Bluetooth headsets are the

way to go these days. To use Bluetooth, your

cell phone will need to have it enabled, or an

infared device somewhere on the phone.

Upcoming devices are utilizing Bluetooth as well,

such as PS3 and the Nintendo Revolution. The

wireless controllers will be Bluetooth enabled,

which will give players the cutting edge.

If you own a cell phone or other wireless device,

you should look into Bluetooth. The technology

is nothing short of spectacular, making it

something that will be around for years and

years to come. As technology gets bigger and

bigger, you can expect Bluetooth to advance

as well.

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Bluetooth Operation

(category: Bluetooth-Technology, Word count: 438)
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The networking standards of Bluetooth will transmit

data via low power radio frequency. Bluetooth

communicates on a 2.45 GHz frequency. This very

band of frequency has been set aside by international

agreement for the use of industrial and medical


Many devices that you already known and use take

advantage of this frequency band. Garage door

openers, baby monitors, and the next generation of

mobile phones all use this frequency within the ISM

band. Ensuring that Bluetooth and the other

devices don't interfere with each other is a crucial

part of the design process.

One of the ways Bluetooth will avoid interfering

with other electronic devices is by sending out

weak signals of around 1 mw. In comparison, even

the most powerful of cell phones can transmit a

signal of 3 watts.

The low power signals will limit the range of a

Bluetooth device to around 32 feet, which cut the

chances of interference between your computer and

other electronic devices. Even though it has low

power, Bluetooth doesn't require a line of sight

between the communicating devices. The walls in

your home won't stop the signal, making it great

for rooms throughout the house.

Bluetooth can connect 8 devices at the same time.

With each of those devices on the same radius,

you may think they would interfere with each

other, although it's very unlikely. Bluetooth

utilizes a technique known as low frequency

hopping, which makes it harder for more than

one device to transmit on the same frequency

at the same time.

With this technique, a device will use 79

individual, randomly chosen frequencies within

a designated range, which change from one another

on a regular basis.

In the case of Bluetooth, the transmitters will

change frequency 1,600 times or more every

second, meaning that more devices can make full

use of the radio spectrum. Since every

transmitter of Bluetooth will use spread spectrum

automatically, it's very unlikely that two

transmitters will be on the same frequency at the

exact same time.

When the Bluetooth devices come within close range

of each other, an electronic conversation will

occur to determine whether or not they have

data to share or whether one needs to take total

control. The user doesn't have any buttons to

press or commands to give - as the conversation

will occur automatically.

Once the conversation has occured, the devices

will form a network. Bluetooth devices will

create a PAN (Personal Area Network) or piconet

that may fill a room. Once the piconet has been

established, the devices will randomly hop in


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Introduction To Bluetooth

(category: Bluetooth-Technology, Word count: 423)
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Bluetooth was designed to allow low bandwidth wireless

connections to become easy to use so even those who

are new to wireless can use them. Version 1.1 of

Bluetooth describes a low power, short range wireless

networking technology that uses radio waves to send

data at rates up to 720 kilobits a second.

The specification for Bluetooth provides for different

classes of radio that allow transmission ranges of

up to 100 meters by boosting the radio power. The

technology of Bluetooth isn't limited to line of

sight transmission since it uses directional waves

that are capable of transmitting through many


Bluetooth is an industry standard communication of

wireless, meaning that it enables the connection

of other devices as well, such as cell phones,

computers, digital cameras, and other types of

electronic devices. The specification of Bluetooth

defines a radio system and a "stack" of protocol

layers and profiles. The highest layer is the

application layer, while the lowest layer is the


The wireless technology of Bluetooth is positioned

to revolutionize the personal connectivity market

by providing freedom from inconvenient fixed type


The specification for Bluetooth eliminates the need

for cables by providing a small form factor, low

cost wireless solution that will link computers,

cell phones, and other electronics. Bluetooth

also allows users to connect many ranges of devices

quickly and easily and expands communications

capabilities as well.

The size of the Bluetooth radio is amazing, as a

Bluetooth radio can be built into one or two very

small microchips then integrated into any electronic

device where wireless operations would be an


Bluetooth also offers a robust link, which ensures

that normal operating circumstances are not

interrupted by interference from other signals

that are operating in the same frequency band.

Also known for its worldwide operation, Bluetooth

radio operates in the 2.4 GHz frequency band, which

is license free and available to any type of

radio system in the world. No matter where you

are in the world, you count on Bluetooth to work.

Security is also important. Offering advanced

security mechanisms, Bluetooth ensures a high level

of security. Therefore, authentification will

prevent unauthorized acess to important data and

make it very difficult to listen in.

Bluetooth also boasts power optimization. The radio

is power friendly and the software for Bluetooth

is very configurable, limiting the power consumption

of equipment. The radio itself only consumes a

small amount of power from a cellular phone.

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