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Bluetooth Specifications
well known Bluetooth: 1. Throughout the United States and even Europe, the range of frequency is 2,400 - 2,483.5 MHZ, with 79 1-MHz RF (radio frequency) channels. The frequency range in Japan is 2,472 to 2,497 MHz with 23 1-MHz RF channels. 2. A data channel of Bluetooth randomly hops 1,600 times per second between the 79 RF channels. 3. Each Bluetooth channel is divided into time slots, with each one being 625 microseconds long. 4. A Bluetooth piconet has one master and up to seven slaves. The master will transmit in even time slots, while the slaves will transmit in odd time slots. 5. The data in a single packet can be up to 2,745 bits in length. 6. Currently, there are two types of data transfer between devices - SCO (synchronous connection oriented) and ACL (asynchronous connectionless). 7. In a Bluetooth piconet, there can be up to three SCO links containing 64,000 bits per second with each one. To help avoid collision and timing problems, the links of the SCO will use reserved slots set up by the master. 8. A master can support up to three SCO links with either one, two, or even three slaves. 9. The slots not reserved for the SCO links can be used for ACL links. 10. A single master and slave can have one ACL link. 11. ACL is either master to one slave (point to point) or it broadcasts to all of the slaves. 12. The ACL slaves will only transmit when it has been requested by the master. If the master doesn't make the request, the ACL slaves won't transmit anything at all.
Advantages And Disadvantages |
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Bluetooth Technical Operations Bluetooth is a high speed, low powered wireless link technology that's designed to connect phones or other portable equipment together with little to no work required by the user. Unlike infrared, Bluetooth doesn't require line of site... Bluetooth Profiles The profile found in Bluetooth will describe how the technology is used. Profiles can be best described as vertical slices through the protocol stack. It will define options in each protocol that are mandatory for the profile. The... Using Bluetooth The amazing technology of Bluetooth presents a great way of exchanging data between two wireless devices. Unlike telephones, there are no wires or messy leads to worry about. You can enjoy wireless communications with short distances of... Choosing A Bluetooth Headset Creating a good wireless headset for Bluetooth is actually difficult to do. The regular wired headsets are easy to design - with ranging styles. Bluetooth headsets can never be as small or as light as wired headsets, simply because it... Bluetooth Glossary Below, you'll find a list of the most used terms in Bluetooth technology. They can serve as a look up, or to help you learn more about Bluetooth terms in general. 2 in 1 handset The situation where a subscriber's handset is acting ... Introduction To Bluetooth Bluetooth was designed to allow low bandwidth wireless connections to become easy to use so even those who are new to wireless can use them. Version 1.1 of Bluetooth describes a low power, short range wireless networking technology that... Bluetooth Wireless Networking Bluetooth technology offers three different types of defined ranges, based on output ranges. Class 1 devices are the most powerful, as they can have up to 100 mW of power, with a regular antenna giving them a range of around 130 - 330... Bluetooth Basics The technology of Bluetooth wireless is a short range communications method intended to replace the cables that connect portable or fixed devices while maintaining the highest levels of security. The key features offered by Bluetooth... How Bluetooth Works Bluetooth devices will normally operate at 2.4 GHZ in the license free, globally available ISM radio band. The advantage to this band includes worldwide availability and compatibility. A disadvantage to this however, is that the devices... Connecting Many With Bluetooth Constantly evolving, the technology of Bluetooth started off as a basic wireless connection standard but has since then been adapted and proven with many different uses and functions. A good example is Bluetooth for cell phones. It ...
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