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