Your Questions About Bluetooth Technology

Richard asks…

how the data is transfered through bluetooth?

In modern cell phones we can transfer data using bluetooth, my question is how it is possible? why the range of connection through bluetooth is limited to 10m?
Exactly speaking how bluetooth functions?

dknol answers:

“exactly speaking” would require a lot more space than I have here. Why 10 meters? Because that was the design goal, bluetooth is intended for desktop use, such as between computer and printer and mouse.

Wikipedia:
Bluetooth is an open wireless protocol for exchanging data over short distances (using short length radio waves) from fixed and mobile devices, creating personal area networks (PANs). It was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of synchronization.

Bluetooth uses a radio technology called frequency-hopping spread spectrum, which chops up the data being sent and transmits chunks of it on up to 79 frequencies. In its basic mode, the modulation is Gaussian frequency-shift keying (GFSK). It can achieve a gross data rate of 1 Mbit/s. Bluetooth provides a way to connect and exchange information between devices such as mobile phones, telephones, laptops, personal computers, printers, Global Positioning System (GPS) receivers, digital cameras, and video game consoles through a secure, globally unlicensed Industrial, Scientific and Medical (ISM) 2.4 GHz short-range radio frequency bandwidth. The Bluetooth specifications are developed and licensed by the Bluetooth Special Interest Group (SIG). The Bluetooth SIG consists of companies in the areas of telecommunication, computing, networking, and consumer electronics.

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Nancy asks…

whats the big deal about blue tooth technology?

I am looking at a cell phone that has blue tooth technology. What is the big deal about it and is it worth having?

dknol answers:

Bluetooth is a wireless interface.
It allows you to connect the phone with other devices with bluetooth, such as headphone/mike, a PC, etc.
Almost all cell phones have now bluetooth,

Chris asks…

Does the Xbox 360 wireless earpiece cause cancer?

I've heard bluetooth technology can explode in your ear and also can it give you cancer? I'm always paranoid about wearing my earpiece in for longer than 20 minute thinking it's giving me cancer or it might blow up

dknol answers:

I've never heard of it blowing up but the amount of radiation needed to give you cancer would require you to hold the device to your ear for more than 100 years.

Laura asks…

How does the bluetooth waves move?

If I am in the ground level and someone on the first level is using Bluetooth too, why can't I see get his signal?
does it work vertically or horizontally and is it affected by the thickness of the wall?

dknol answers:

If you are trying to communicate with the bluetooth device and can't you may not be pairing it correctly or it may be out of range. Most cell phone bluetooth devices have a range of about 30 feet, but if you are going through walls it may shorten that range. Here is some information from bluetooth.com that should answer your question if you are referring to interference. If you need to know more about it just go to the site.
Bluetooth technology’s adaptive frequency hopping (AFH) capability was designed to reduce interference between wireless technologies sharing the 2.4 GHz spectrum. AFH works within the spectrum to take advantage of the available frequency. This is done by detecting other devices in the spectrum and avoiding the frequencies they are using. This adaptive hopping allows for more efficient transmission within the spectrum, providing users with greater performance even if using other technologies along with Bluetooth technology. The signal hops among 79 frequencies at 1 MHz intervals to give a high degree of interference immunity.

Donald asks…

Is the Nissan 2009 Maxima with Premium + Technology Packages Really ‘Worth It'? How do you like yours?

Is the Nissan 2009 Maxima with Premium + Technology Packages Really ‘Worth It'? How do you like yours?

This question goes out to only those who drive a 2009 (not a 2008) Maxima, preferably with the Premium + Technology packages.

How good is the equiptment? Is it worth the pretty penny on a lease?

dknol answers:

9.3 gig hard drive, Navigation. Satellite radio and bluetooth along with a really cool looking car. Be sure you also get the I-Pod interface. I work on Nissan's for a living. The economic downturn may make Maxima a good deal because if the USA keeps printing money the car will only cost more in the future. If you have to lease you may want to purchase it at the end of the lease term. If the economy turns to inflation Maxima will only cost more by then.

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