What is Bluetooth®?
Bluetooth® is the name of the wireless technological standard for connecting the device that is set to replace the cables. It uses radio frequencies in the 2.45 GHz range to transmit information at short distances generally 33 feet (10 meters) or less. By inserting the chip and Bluetooth® receiver into the products, cables that would normally carry a signal can be eliminated. Proprietary cables, protocols and cradles simply complicate things because companies are looking for a larger market share while buyers are looking for user -friendly gadgets that are compatible with other products.
Enter Bluetooth® Standard. Idealized by a group of electronics manufacturers looking for an effective solution to a growing problem, promises that it does not complicate the connection of the device, EASING production suffering and end users' problems. Thanks to EMBEDDED Bluetooth® technology, various devices including mobile phones, headset and headphones, digital cameras and computers can easily communicate betweenwith yourself without cables or settings.
One wireless standard, which is already known for many, is Irda or infrared. Infrared infrared uses the pulses of invisible light to communicate between two devices, such as remote control of a TV or DVD player. One disadvantage is that there must be a clear line of supervision between the two devices and the other disadvantage is that Irda usually works between two devices only at once. The remote control infrared unit cannot communicate with the DVD player while signaling the TV. Bluetooth® exceeds these limitations using radio waves to send information in the rupture of packets. Bursts can be sent to any devices on "Sonishot" allocopy of the wing with several devices at once.
with popularity of PDA products, many have lost their fear of synchronization with their computer systems. To ensure success is usedThe cradles, cables and sometimes happiness. Bluetooth® technology eliminates this problem because the allowed devices are easy to recognize and communicate spontaneously.
Bluetooth® devices always communicate in the house if they are driven. Each device sends a signal to receive other devices that send their own signals. The devices scan all the signals to see if they are dealing with them. In this way, Bluetooth® creates a personal area (PAN) network in the house and the user does not have to do anything special to talk to the device. By default, they work in permanent interactive mode.
For example, assume that you are using a mobile phone and a headset while copying a DVD from your Entertainment Center to the desktop - Meanwhile, your digital camera interprets your content into your laptop. Bluetooth® devices that have business with each other will start their own separate pelvis (also called piconet ) and synchronize the random scheme of jumping to createRinning of communication without interference. Known as sled-spectrum frequency hopping , the device jumps between 79 random frequencies in the specified range and a change of about 1,600 times per second in the perfect unison. The probability that the device in another pan will use the same frequency at the same time is a minute. Therefore, several individual pans or piconets can work in the house without affecting each other. Each piconet can have 1 master and up to 7 slave devices. Future versions can allow connected piconets called scatternets .
Although other gadgets in the house could use a range of 2.45 GHz, Bluetooth® is separated from them using a very weak signal that it is "flying under the radar". On the other hand, these other products rarely cause interference with Bluetooth® because frequency jumping maintains potential short interference.
The maximum bandwidth for any one channel or frequency is 1 megabyte per second (1 Mbps), while individual packets range up to 2,745 bits. CurrentlyThere are three flavors or classification of Bluetooth® devices, due to transmission range. As the range increases, the stronger signal is used in the appropriate classification. Note that class 3 devices are quite rare.
| Class | signal strength | Range | 1 Milliwatt | to 33 feet (10 meters) | 10 Milliwatts | to 33 feet (10 meters) | 100 Milliwatts | to 328 Feet (100 meters) | Three security levels are also available, and if they work in a secure mode from which you can choose three different security protocols. However, the criticism has been balanced in these standards and claims that they are too weak for a truly safe network. Due to the limited operating rangeHU and purpose was not the main problem in its proposal. Given that class 3 standards and possibly future flavors appear, security will almost certainly improve. The versions numbers will also change how technology improves. Version 1.1, 1.2 and 2.0 are slightly different, as well as future editions.