Bluetooth

Brief Background:

Bluetooth is a short distance wireless connection system that is used for a multitude of things. It can be used to download pictures from a camera to a laptop, link two devices for music or calling, and for a wireless mouse. The technique behind bluetooth, Frequency Hopping Spread Spectrum (FHSS), was first used in WWII to control a torpedo without it being able to be jammed. Over the next years it became more advanced, became integrated into many products, and received its name from the nickname of King Harald Blatand of the Danes.

How It Works:

Bluetooth uses 79 different radio frequencies to transmit and receive information from other devices. When two or more devices are connected and sharing information they form a mini computer network called a piconet. Multiple piconet's can also connect and share information forming a scatternet. Bluetooth communicates through Spread-Spectrum Frequency Hopping (SSFH), a system where the devices automatically switch between different radio frequencies. When Bluetooth uses SSFH it switches frequencies thousands of times per second. This minimizes interference from other radio wave devices and vastly increases its security.

Pros:

- Secure

- Efficient

- Little Battery Use

Cons:

- Automatic Connection When Not Wanted

- Expensive

- Difficult To Set Up

Future:

In the future this technology will be used for large scale project such as home and industrial automation. The range and data transfer rates will increase allowing for many new uses.

Works Cited

“How Does Bluetooth Work?” Explain That Stuff, 11 Nov. 2017, www.explainthatstuff.com/howbluetoothworks.html.

Systems, eZ. “A Short History of Bluetooth.” A Short History of Bluetooth / ULP Wireless Update / News / Home - Ultra Low Power Wireless Solutions from NORDIC SEMICONDUCTOR, www.nordicsemi.com/eng/News/ULP-Wireless-Update/A-short-history-of-Bluetooth.