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Table of Content Page Number Outline the development and uses of the chosen technology Discuss the underlying physical principles used by the technology Bibliography Appendix Outline: Bluetooth is very important in our everyday lives. We use Bluetooth for a lot of things, but what exactly is Bluetooth' Bluetooth is an open wireless network used for connecting and transferring information between devices such as mobile phones, laptops and PC’s over short distances. Bluetooth just replaces the wires and cables so there is no fuss and confusion. Many people think that Bluetooth just send files between two devices, but there are actually many different types of things that Bluetooth can do which include; Hands Free which allows phones to connect with hands free devices such as wireless headsets. File Transfer which is used to send small files between compatible devices. Basic Imaging which allows images to be transferred between two devices. Advanced Audio Distribution which allows two or more devices to share a song. Video Remote Control which is responsible for letting devices remotely control the navigation of other devices, like the control of a playlist on your music player by a Bluetooth enabled headset. Also Human Interface Device which connects devices like keyboards and mouses to PC’s. How was Bluetooth invented, and by who' Bluetooth was invented in 1994 by engineers working in a large Swedish company called Ericsson. In 1998, the five founding companies of Bluetooth which are, Intel, IBM, Nokia, TOSHIBA, and Ericsson came together and agreed to use Bluetooth as a way to connect their products. Later these companies formed the Bluetooth Special Interest Group (SIG), an organization made to maintain technology. Within six months SIG went global and other companies like, Microsoft, Lenovo, Motorola, Samsung and many more joined. But today Bluetooth technology is owned by Bluetooth SIG, many members of Bluetooth SIG worked together to develop Bluetooth, that is how Bluetooth was invented. So why is it called Bluetooth' Bluetooth was named after a Danish King and Viking named King Harald Blatand who lived in the 10th century. It was named after King Harald, because he united Norway, Sweden, and Denmark, as well as how Bluetooth unites two things together like two different mobile phones are united when they are using Bluetooth. That is how Bluetooth got its name of Bluetooth. So where is Bluetooth used' Bluetooth is used in our everyday lives, people use Bluetooth to send songs to each other from mobile phone to mobile phone, and they think that, that is its only use for Bluetooth, but for real there are a lot more uses of Bluetooth some of these uses include; mobile phones which can send a song to another mobile phone. Computers can send a file from a computer to a laptop. Laptops can send files from phone to a laptop. Hands free devices like wireless headsets when you are driving in a car. Gaming consoles like a Play Station 3 can send files to your phone. Cameras can print photos via Bluetooth. Printers can send photos to your phone. Also Cars can play music from your phone via Bluetooth, those are some of the uses of Bluetooth. Word Count- 501 words Wireless Bluetooth Headset from Google Images Discussion: We use Bluetooth in our everyday lives, but exactly how does Bluetooth technology work, communicate, operate, and secure the information being sent' Transmission of data through Bluetooth is through low power radio waves. Bluetooth uses short wavelengths which are around 12.5cm and has a frequency between 2.402 and 2.480 GHz. From: http://electronics.howstuffworks.com/bluetooth2.htm In order for Bluetooth devices not to interfere with other systems or equipments around it, it transmits weak signals of about 1 mW. The low power limits the range of a Bluetooth device to about 10 meters, eliminating the chances of interference between your computer system and your telephone or television. Walls in the house do not interfere with a Bluetooth signal. Bluetooth’s speed is very good for closer distances the device transmits data at 480 Mbps up to 2 meters away from the source and at 10 meters, the speed drops to 110 Mbps. But how does Bluetooth stop itself from interfering with other Bluetooth devices' With a lot of equipment using Bluetooth technology today, Bluetooth avoids interference by using a technology called Spread Spectrum Frequency Hopping, which reduces the chance of two Bluetooth devices using the same frequency, because there are 79 different frequency channels which are randomly chosen within a designated range and the transmitters change frequencies 1,600 times a second, therefore it will be very rare for two Bluetooth devices to be on the same frequency as another Bluetooth device and that means it is very rare for interference. So how do Bluetooth devices communicate' When Bluetooth devices are within range, a conversation between them occurs to determine whether they have data to share or whether one will control the others. It is an automatic process. A Bluetooth device uses a personal area network or Piconet. Once a Piconet is created, the frequencies of the two devices hop frequently and simultaneously to keep in touch with one another and to avoid other Piconets or Bluetooth device that may be in the same room. So how does Bluetooth secure the things that are being sent' In Bluetooth a major concern is security. This is because devices can easily receive radio waves from the air, so people who are sending personal things need to make sure that their stuff does not get intercepted and be sent to the wrong mobile phone. But Bluetooth has an automatic connection, which is a huge benefit in terms of time and effort. It is also a benefit to people looking to send you data without your permission. Bluetooth offers a lot of different types of security. Bluetooth users can add a device, which is known as trusted device, and you can exchange data to a trusted device without asking for permission. Also when a device that is not added to your device, so it is not a trusted device, then when they send data, your Bluetooth device will have to give permission if it wants to accept the data or decline the data. Service level security and device level security work together as a team to protect Bluetooth devices from unknown senders. Security methods include, authorization and identification which limits the use of registered devices and allows the user to accept or open any files being sent. Another method is putting your Bluetooth’s device to non discoverable. This means no other Bluetooth device will be able to find your Bluetooth device. This can be useful in public, so there are no unknown files being sent to your Bluetooth device. That is how Bluetooth protects its users from unknown data. So what are the applications of Bluetooth' Bluetooth has many applications like, transferring data between phones, computer and laptops. Bluetooth can also be used on hands free devices such as wireless headsets for a car and gaming consoles. Bluetooth is also used for wireless keyboards, and wireless mouses. Some facts about Bluetooth include, So what is going to happen to Bluetooth in the future' As more phones come out, more phones will have access to Bluetooth technology, and this allows scientist to make better technology which uses Bluetooth, because everyone will have a Bluetooth device in the future. Currently Bluetooth is very useful in our lives, but in the future Bluetooth will make our lives a lot easier. In the future, Bluetooth will be used for; retail and e-Commerce, medicine, travel, and home networking. So how will Bluetooth work in the future' For retail and e-Commerce Bluetooth wireless technology will connect to other Bluetooth devices to complete retail transactions, like in a shop, Bluetooth will be able to connect to a cash register that has Bluetooth, and then we will be able to pay for our goods using Bluetooth. In medicine Bluetooth technology is also very useful. Bluetooth will be useful for patient monitoring, wireless biometric data, and medicine dispensers. Patient monitoring is becoming a lot more common. Patients can measure certain body function and then send this to their care provider electronically. Word Count- 502 words Conclusion: I strongly believe that Bluetooth technology is very good. Bluetooth has helped our lives dramatically, it has made our lives a lot simpler. I think that in the future Bluetooth will be very popular and a must need. As more phones come out with Bluetooth, the more we can do with it. Without Bluetooth we will have to use wires to send data to other devices, and we wouldn’t have wireless mouses and keyboards. Bibliography: http://www.informit.com/articles/article.aspx'p=24243 http://electronics.howstuffworks.com/bluetooth1.htm http://electronics.howstuffworks.com/bluetooth2.htm http://electronics.howstuffworks.com/bluetooth3.htm http://electronics.howstuffworks.com/bluetooth4.htm http://electronics.howstuffworks.com/bluetooth5.htm http://en.wikipedia.org/wiki/Bluetooth http://www.bluetooth.com/Pages/Bluetooth-Home.aspx http://www.couriermail.com.au/news/technology/link-up-now-easy/story-e6frep1o-1111112171894 (Secondary source of data from newspaper article, which was from The Courier-Mail, August 30th 2006 by Stephen French. The article was called “Link up now easy”) Appendix Figure 1.1 (From Google Images) Figure 1.2 (From Google Images) Figure 1.3 (From Google Images) Figure 1.4 Class | mW | dBm | Range (approximate) | Class 1 | 100 | 20 | ~100 meters | Class 2 | 2.5 | 4 | ~10 meters | Class 3 | 1 | 0 | ~1 meter | | | |