OCTOBER 20, 2014
Bluetooth an emerging technology
Blue-tooth is a great emerging technology being used today, which also has potential for much more uses than the tradition bluetooth headset. Bluetooth connects gadgets together, helping users listen to music, talk on phones without having to deal with frustrating cords and wires. To understand how a Bluetooth connection works, I will use an example such as a phone connected to wireless speaker. First, each device is equipped with Bluetooth connectivity, a feature that requires both software and hardware components. On the hardware side, an antenna-equipped chip in both devices sends and receives signals at a specific frequency. The software interprets incoming Bluetooth signals and sends them out in ways other devices can read and understand. In the case of the wireless speaker, the phone will know how to send audio files and information in a format that the speaker understands, while the speaker can interpret these signals–as well as other indicators such as volume and track controls–from the phone.
When two devices are equipped with Bluetooth, usually one of them will to be set to be discoverable, which means it will show up in a list of Bluetooth devices in the area on your controlling device. Using that example, the wireless speaker would be discoverable, and it will be able to be controlled by a Bluetooth-equipped device. The speaker/ Bluetooth capable device, sends out a signal with a little bit of information to alert other nearby devices of its presence and capabilities. The phone then connects, and the two devices form a personal area network, also known as piconet (A piconet is a network that is created using a wireless Bluetooth connection. A piconet consists of two or more devices occupying the same physical channel (synchronized to a common clock and hopping sequence ). Now that this process happened the two devices know to connect with each other based on the unique address within their respective signals. No matter what other signals come in on wavelengths in which those devices operate operate, they will always detect, read, and send the correct signals. Bluetooth signals have a limited range, which prevents massive amounts of conflicting data covering huge areas and interrupting communication between other devices.
Bluetooth chips produce wavelengths that are bound to frequencies operating within a range specifically set aside for this sort of short-range communication. Other devices you might find that use this frequency include cordless telephones and baby monitors. However, there is an issue with always using the same frequency. Other devices operating at the same, or close, frequencies can cause interruptions in the signal. To prevent this from being an issue, the signal is spread out over a wider range of frequencies. In order to achieve this, the signal hops around the frequency, and in the case of Bluetooth that happens about 1600 times per second. The frequent change in wavelength means that even a consistent signal won’t interrupt, and won’t be interrupted, for longer than 1/1600th of a second. Bluetooth headsets can sync up in two different ways, using a full or part duplex connection. Or using a full-duplex signal means that all connected devices are able to send and receive signals meaning a two way conversation simultaneously accuring in this instance, as opposed to a half-duplex signal, like a walkie-talkie, where each side can still talk and listen, just not both at the same time.
Blue tooth does have its advantages and disadvantages, that can make or break its progress in today fast pase technological society advantages and disadvantages of Bluetooth technology are commonly known users who regularly use it absolutely swear by it, especially because the data transfer speeds that are provided are very impressive. Since multiple devices...
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