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How Bluetooth Works

How Bluetooth Works

Bluetooth devices will normally operate at 2.4 GHZ

in the license free, globally available ISM radio

band. The advantage to this band includes worldwide

availability and compatibility. A disadvantage to

this however, is that the devices must share this

band with other RF emitters. This includes

automobile security systems, other wireless devices,

and other noise sources, such as microwaves.

To overcome this challenge, Bluetooth employs a

fast frequency hopping scheme and therefore uses

shorter packets than other standards within the

ISM band. This scheme helps to make Bluetooth

communication more robust and more secure.

Frequency hopping

Frequency hopping is basically jumping from frequency

to frequency within the ISM radio band. After a

bluetooth device sends or receives a packet, it

and the device (or devices) it's communicating with

hop to another frequency before the next packet is

sent. This scheme offers three advantages:

1. Allows Bluetooth devices to use the

entirety of the available ISM band, while never

transmitting from a fixed frequency for more than a

short period of time. This helps insure that

Bluetooth conforms to the ISM restrictions on the

transmission quantity per frequency.

2. Ensures that any interference won't

last long. Any packet that doesn't arrive safely

to its destination can be resent to the next

frequency.

3. Provides a base level of security as

it's very hard for an eavesdropping device to predict

which frequency the Bluetooth devices will use

next.

The connected devices however, must agree upon the

frequency they will use next. The specification

in Bluetooth ensures this in two ways. First, it

defines a master and slave type relationship between

bluetooth devices. Next, it specifies an algorithm

that uses device specific information when

calculating the frequency hop sequences.

A Bluetooth device that operates in master mode can

communicate with up to seven devices that are set in

slave mode. To each of the slaves, the master

Bluetooth device will send its own unique address

and the value of its own internal clock. The

information sent is then used to calculate the

frequency hop sequences.

Because the master device and each of the slave

devices use the same algorithm with the same initial

input, the connected devices will always arrive

together at the next frequency that they have agreed

upon.

As a replacement for cable technology, it's no

wonder that Bluetooth devices are usually battery

powered, such as wireless mice and battery powered

cell phones. To conserve the power, most devices

operate in low power. This helps to give Bluetooth

devices a range of around 5 - 10 meters.

This range is far enough for wireless communication

but close enough to avoid drawing too much power

from the power source of the device.

#Bluetooth #wireless #tech #mobile #technology

Ways To Improve Sales Through Your Website

Ways To Improve Sales Through Your Website

Anyone who has been marketing online knows that the lifeblood of a business is the traffic of a site. More visitors equal more sales. However, here are some ways that you can tweak your sites with to improve sales without the need to get more visitors.

The first method is to weave in your personal touch in your sales message. Nobody wants to be sold to by a total stranger, but many people will buy what their close friends recommend to them. If you can convince your audience that you are a personal friend who has their best interest at heart, they will be convinced to buy your products. Remember to speak to an individual in your salesletter, not to your whole audience.

The second method is to publish testimonials and comments from your customers. A good idea would be to publish both good and bad comments; that way prospects will be really convinced that these testimonials are real. When prospects see testimonials on your website, they will have the confidence to buy from you because human beings follow the herd mentality; when others have bought and proven it authentic, they will jump on the bandwagon and buy too.

Use visual representations for the problems and solutions that your product offers. Not everyone will read your text copy from the head to the tail, but most people will pay attention to images on your website.

Offer quality bonuses to accompany the product. When you offer bonuses that complement your product, your prospects will feel it's a very good deal and it would be stupid to miss it. Be sure to state the monetary value of your bonuses so that people will be even more compelled to grab your good bargain.

Lastly, ask for the sale! Many people entice their prospects with the benefits of their product, sell to them with stories of how it has solved many problems, even offered killer bonuses but forget to ask for the sale. Give a clear instruction on how to buy your product (e.g. "click the button to buy now!").

#tech #website #internet #sales #business

5 Ways to Utilize Auto Navigation Systems and GPS Technology While Traveling

5 Ways to Utilize Auto Navigation Systems and GPS Technology While Traveling

If you have managed to do any research on auto navigation systems I'm sure you've come across countless nifty features that these devices have in common. While not all devices utilize the very same technology, it is great to know that cell phones today in addition to handheld auto navigation systems are utilizing technology that make travel and locating lost children, pets, and other loved ones a little bit easier to manage in today's hectic world.

There are many ways that the technology that drives GPS can improve our lives both at home and while we travel. Below you will find some great ways that this technology helps improve your overall travel experience.

1) Trip Planning. Not only are auto navigation systems great to have while on your trip, they are also quite useful when planning your trip. You will not have to listen to endless whining about whether we are there yet or how much fathers. Your children can listen along with you as you plan your trip and find out fascinating places to stop, view scenery, and get some great chow along the way. You should also be able to quite easily find out about neat shopping, shows, and other points of interest en route as well. Finding something for everyone keeps the entire family happy on your trip.

2) Finding restaurants, theatres, and nearby malls. This is very important not only when traveling to your destination but also once you've arrived. Many of the nicer auto navigation systems on the market today are able to sort restaurants that are nearby. These systems are much more than simple software that is designed for the sole purpose of giving directions. They are fully functional navigational tools. Some of them even have entertainment features, which will allow them to be used as ebook readers and/or MP3 players.

3) Keeping tabs of family in crowded situations. Even in the mall, you can have family members going off in different locations and keep track of them all. This is also true at graduation ceremonies and other events, which may call for family members spreading out over a large amount of space leaving some out of sight at times.

4) Security when away from home. The idea of being away from home, particularly with teens can be very frightening. We want them to be independent and at the same time we want to never let them out of our sight. Having a cell phone that allows GPS tracking of your teen is a great way to have the best of both worlds. You can keep a watchful eye on where they are without having them in your direct line of sight. This allows them the freedom to pursue their own interests and you the security of watching that happen.

5) Tracking important items while traveling. This may not seem like such a big deal until you've dealt with lost luggage a time or two. The truth is that this is a huge load off the minds of many, particularly when it comes to laptops and electronic devices that have important information.

If you haven't considered these reasons for purchasing an auto navigation system or making use of the many options for safety and security that GPS Technology allows in your life, it is time to give these things some serious thoughts. Our children are the most important thing in the world we can protect and it is well worth the minimal investment in the software required to assist in keeping them safe.

#tech #GPS #technology #travel #navigation