| The technology of Bluetooth will take | | | | protocols, and even adapted protocols. |
| small area networking to the next level | | | | 6. The transmitter operates around the |
| by removing the need for user | | | | 2.4 GHz frequency band. |
| intervention and help keep transmission | | | | 7. The data channel will change |
| power very low to preserve battery | | | | frequency, or hops, 1,600 times in a |
| power. Each transmission signal to and | | | | second, between the 79 allocated |
| from your cellularphone will use just 1 | | | | channels in the ISM band. |
| mw of power, giving you plenty of space | | | | 8. Bluetooth utilizes a spread spectrum |
| on your battery to talk. | | | | frequency hopping RF characteristic to |
| Bluetooth is a networking standard that | | | | ensure that independant networking |
| will work on two levels: | | | | operates when the other devices are in |
| 1. It will provide agreement at the | | | | range. |
| physical level, as Bluetooth is a radio | | | | 9. A piconet is formed when one or more |
| frequency standard. | | | | devices open up a channel of |
| 2. It will provide agreement at the | | | | communication. |
| level of protocol, where products will | | | | 10. A piconet can have a master and up |
| have to agreeon when bits are sent, how | | | | to seven slaves. |
| many are sent, and how the parties in | | | | 11. Communication of the interdevice is |
| conversation can be sure the message | | | | based on the concepts of channels. |
| recieved is the same one that was sent. | | | | 12. All Bluetooth devices are capable |
| The major draws to Bluetooth is the fact | | | | of transmitting voice. |
| that it's wireless, inexpensive, and | | | | 13. The channel has a total capacity of |
| automatic. There are other ways to get | | | | 1 MB per second. |
| around wires, including infrared. | | | | 14. There are two types of channels |
| Infrared uses light waves of a lower | | | | with Bluetooth - SCO (Synchronous |
| frequency than the human eye can, and is | | | | Connection Oriented) and ACL |
| normally used in television remote | | | | (Asynchronous Connectionless). |
| controls. | | | | 15. The SCO channels are time oriented, |
| The technology of Bluetooth is intended | | | | andare therefore primarily used for |
| to get around the problems that normally | | | | transferring time critical data such as |
| come with infrared systems. The 1.0 | | | | voice. |
| older standard of Bluetooth has a max | | | | 16. ACL channels are normally used for |
| transfer speed of 1 MB a second, while | | | | communicating data. |
| the 2.0 Bluetooth standard canmanage up | | | | 17. Data contained in a packet can be |
| to 3.0 MB a second. To make things | | | | up to 2,745 bits in length. |
| better, 2.0 is compatible with 1.0 | | | | 18. In a single piconet, there can be |
| devices. | | | | up to three SCO links containing 64,000 |
| As a solution to wireless, Bluetooth | | | | bits a second each. |
| will eliminate the need for messy cords, | | | | 19. To avoid collision and timing |
| keeping everything nice and neat. It's | | | | problems, SCO links are reserved slots |
| perfect for those who like to talk on | | | | that are set up by the master. |
| cell phones, as you no longer need to | | | | 20. The masters can support up to three |
| hold the phone next to your ear - which | | | | SCO links with either one, two, or three |
| is great for those who travel a | | | | slaves. |
| Bluetooth is easily the best in wireless | | | | 21. The slots that aren't reserved for |
| handheld technology. When it comes to | | | | SCO links can be used as ACL links. |
| learning, Bluetooth can get quite | | | | 22. The LMP (Link Management Protocol) |
| complicated. To help you, you'll find | | | | will handle link level security, error |
| the key learning points of Bluetooth | | | | corrections, and the establishment of |
| below: | | | | communications links. |
| 1. Bluetooth is an energy efficient, | | | | 23. The LMP packets will have priority |
| low overhead communication protocol | | | | over user packets that originate and |
| that's ideal for interdevice | | | | form the L2CAP layer. |
| communications. | | | | 24. The L2CAP layer will ensure an |
| 2. Unlike infrared, Bluetooth doesn't | | | | acceptable quality of service. |
| require a line of sight. | | | | 25. No more than one ACL link can exist |
| 3. Depending on the implementation, | | | | at the L2CAP layer. |
| Bluetooth can have a range of up to 100 | | | | Kanicen is the owner of IT Comser |
| meters. | | | | System, IT Comser System welcomes |
| 4. The specification of Bluetooth | | | | everyone who are looking for computer |
| consists of a Foundation Profile | | | | services, maintenance, computer rental, |
| Document and a Foundation Core Document. | | | | pc repair, computer sales and all kind |
| 5. The protocol stack for Bluetooth | | | | of computing resources. |
| consists of core protocols, cable | | | | |