Bluetooth Basics
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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 include low power and low cost. The specification in Bluetooth defines a uniform structure for a wide range of devices to communicate and connect with one another.The technology behind Bluetooth has achieved global satisfaction such as enabled devices, almost everywhere in the world. Bluetooth devices will connect and communicate without wires through short range and networks known as piconets.Each device will simultaneously communicate with up to seven other devices within a single piconet, meaning that each device can also belong to several piconets simultaneously. The piconets are dynamically established as Bluetooth enabled devices enter and leave the proximity of radio.A fundamental to Bluetooth strength is the ability to handle both data and voice transmissions simultaneously. This will enable users to enjoy varieties of innovative solutions such as hands free talking, printing and fax capabilities, and other applications.Specifications - Unlike other standards of wireless, the Bluetooth specification gives product developers both a link layer and application layer definitions, which will help support data and voice applications.Spectrum - The Bluetooth technology operates in the industrial and scientific band at 2.4 to 2.485 GHz, using a spread spectrum, frequency hopping signal. Interference - The adaptive frequency hopping of Bluetooth technology was designed to reduce interference between wireless technologies that share the 2.4 GHz spectrum. Adaptive frequency hopping (AFH) works well within the spectrum to take full advantage of the frequency available.AFH hopping allows for more efficient transmission within the spectrum, which provides users with greater performance even if they are using other technologies along with Bluetooth.
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Wednesday, September 9, 2009
Introduction To Bluetooth Technology
Introduction To Bluetooth Technology
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The technology of Bluetooth is nothing new, but in many respects it can still seem like more of a buzz word rather than an accepted technology. You may see the ads for Bluetooth enabled devices, although you still may be wondering what it is.Capabilities - The Bluetooth definition is a wireless technology that is a worldwide specification for a small form factor, low cost solution that will provide link between mobile devices and other electronic devices.Similiar to 802.11 b/g wireless and many cordless telephone systems, Bluetooth operates on 2.4 GHz radio signals. The 2.4 GHz band seems to be a bit crowded, with interferences between the devices a bit hard to avoid. Telephones are now being offered at the 5.8 GHz frequency band, which will help to remedy this.The technical specifications of Bluetooth will indicate a maximum transfer rate of 723 kbps with a range of 65 - 328 feet, all depending on the class of that particular device. The speed is a fraction of what is offered by wireless standards, so it's obvious that Bluetooth doesn't really pose a threat to replacing your wireless network.Applications - There are numerous products that will take advantage of Bluetooth capabilities, such as laptops, PDAs, headphones, and even wireless printer adapters.A lot of laptops out there will include an onboard Bluetooth adapter which allows the system to connect to any Bluetooth device right out of the box. For computers that don't have an adaptor built right in, there are several USB adaptors available for Bluetooth.For an awesome technology, Bluetooth is actually hard to compete with. For short range wireless, Bluetooth is easily one of the best. The standard for Bluetooth keeps getting better and better, making it a wireless technology that will be around for years and years to come.
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The technology of Bluetooth is nothing new, but in many respects it can still seem like more of a buzz word rather than an accepted technology. You may see the ads for Bluetooth enabled devices, although you still may be wondering what it is.Capabilities - The Bluetooth definition is a wireless technology that is a worldwide specification for a small form factor, low cost solution that will provide link between mobile devices and other electronic devices.Similiar to 802.11 b/g wireless and many cordless telephone systems, Bluetooth operates on 2.4 GHz radio signals. The 2.4 GHz band seems to be a bit crowded, with interferences between the devices a bit hard to avoid. Telephones are now being offered at the 5.8 GHz frequency band, which will help to remedy this.The technical specifications of Bluetooth will indicate a maximum transfer rate of 723 kbps with a range of 65 - 328 feet, all depending on the class of that particular device. The speed is a fraction of what is offered by wireless standards, so it's obvious that Bluetooth doesn't really pose a threat to replacing your wireless network.Applications - There are numerous products that will take advantage of Bluetooth capabilities, such as laptops, PDAs, headphones, and even wireless printer adapters.A lot of laptops out there will include an onboard Bluetooth adapter which allows the system to connect to any Bluetooth device right out of the box. For computers that don't have an adaptor built right in, there are several USB adaptors available for Bluetooth.For an awesome technology, Bluetooth is actually hard to compete with. For short range wireless, Bluetooth is easily one of the best. The standard for Bluetooth keeps getting better and better, making it a wireless technology that will be around for years and years to come.
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Bluetooth Versions
Bluetooth Versions
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Version 1.1 and earlier - Since the technology of Bluetooth was introduced in 1998, several specification versions have been released. Versions 1.0 and 1.0B had too many issues and problems for manufacturers to develop devices for Bluetooth. The main issue was the lack of communication among the devices.The core specification version 1.1 is the first successful operating version of Bluetooth. Version 1.1 corrected a majority of the bugs and problems found in earlier versions.Version 1.2 - Many of the newer Bluetooth devices, such as the newer cell phones are being sold with the newer Bluetooth version 1.2. This version offers backward compatability with Bluetooth 1.1, faster transmission speeds, received signal strength, and a host controller interface (HCI) support for 3 wire UART.Bluetooth version 2.0 - It's true that there may be multiple communication technologies, although they all share one common trait - faster is better. Bluetooth specialists realized this, and therefore worked on improving the speeds of version 1.2. The newest version, version 2.0 + EDR (Enhanced Data Rate) was accounced in 2004 and became available in late 2005.Version 2.0 delivers data transfer rates of up to three times that of the original version of Bluetooth. Version 2.0 also provides enhanced connectivity. With Bluetooth 2.0 + EDR, you'll be able to run more devices at the same time -with more efficiency.Computers and even computer related devices are expected to be some of the first devices to encorporate Bluetooth 2.0 + EDR, followed of course by audio and imaging devices. Version 2.0 is backward compatible with previous versions, three times faster, and offers an enhanced data rate of 2.1 MB a second. It also offers broadcast and multicast support, along with a further enhanced bit error rate performance, making it the best Bluetooth has ever seen.
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Version 1.1 and earlier - Since the technology of Bluetooth was introduced in 1998, several specification versions have been released. Versions 1.0 and 1.0B had too many issues and problems for manufacturers to develop devices for Bluetooth. The main issue was the lack of communication among the devices.The core specification version 1.1 is the first successful operating version of Bluetooth. Version 1.1 corrected a majority of the bugs and problems found in earlier versions.Version 1.2 - Many of the newer Bluetooth devices, such as the newer cell phones are being sold with the newer Bluetooth version 1.2. This version offers backward compatability with Bluetooth 1.1, faster transmission speeds, received signal strength, and a host controller interface (HCI) support for 3 wire UART.Bluetooth version 2.0 - It's true that there may be multiple communication technologies, although they all share one common trait - faster is better. Bluetooth specialists realized this, and therefore worked on improving the speeds of version 1.2. The newest version, version 2.0 + EDR (Enhanced Data Rate) was accounced in 2004 and became available in late 2005.Version 2.0 delivers data transfer rates of up to three times that of the original version of Bluetooth. Version 2.0 also provides enhanced connectivity. With Bluetooth 2.0 + EDR, you'll be able to run more devices at the same time -with more efficiency.Computers and even computer related devices are expected to be some of the first devices to encorporate Bluetooth 2.0 + EDR, followed of course by audio and imaging devices. Version 2.0 is backward compatible with previous versions, three times faster, and offers an enhanced data rate of 2.1 MB a second. It also offers broadcast and multicast support, along with a further enhanced bit error rate performance, making it the best Bluetooth has ever seen.
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Bluetooth Wireless Networking
Bluetooth Wireless Networking
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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 feet.The class 2 devices are lower power, offering up to 2.5 mW of power. A regular antenna will give them a range of around 50 - 100 feet. Class 3 devices use even less power, up to 1 mW of power to be exact. With a regular antenna, they will have a range of around 16 - 33 feet.Even though you may not realize it, Bluetooth wireless technology has never been intended for anything other than short distance types of communication. With Bluetooth wireless, the short range is actually a benefit.For one, the short range will reduce the change of interference between your devices and those that belong to others who are nearby. Overall, this is a basic type of security, designed to protect you and your devices.Secondly, the lower power used for short range means a longer battery life. Most Bluetooth devices will get their power from a battery, meaning that anything you can do to lengthen the battery life is very important.The wireless networking offered by Bluetooth is actually among the best, even though it uses short range communication. Bluetooth is used with wireless controllers, the internet, and even wireless headsets.For the best in short range technology, Bluetooth is extremely hard to beat. If you've never tried Bluetooth before, now is the time. It's the best with wireless networking, especially for those who enjoy hands free talking on their cell phone.
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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 feet.The class 2 devices are lower power, offering up to 2.5 mW of power. A regular antenna will give them a range of around 50 - 100 feet. Class 3 devices use even less power, up to 1 mW of power to be exact. With a regular antenna, they will have a range of around 16 - 33 feet.Even though you may not realize it, Bluetooth wireless technology has never been intended for anything other than short distance types of communication. With Bluetooth wireless, the short range is actually a benefit.For one, the short range will reduce the change of interference between your devices and those that belong to others who are nearby. Overall, this is a basic type of security, designed to protect you and your devices.Secondly, the lower power used for short range means a longer battery life. Most Bluetooth devices will get their power from a battery, meaning that anything you can do to lengthen the battery life is very important.The wireless networking offered by Bluetooth is actually among the best, even though it uses short range communication. Bluetooth is used with wireless controllers, the internet, and even wireless headsets.For the best in short range technology, Bluetooth is extremely hard to beat. If you've never tried Bluetooth before, now is the time. It's the best with wireless networking, especially for those who enjoy hands free talking on their cell phone.
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Choosing A Bluetooth Headset
Choosing A Bluetooth Headset
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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 needs to include the battery and extra functions. This extra size will impact how the headset mounts on or around your ears.Comfort - There seems to be two main styles of headsets for Bluetooth. Some are held into place with a loop around the ear. These styles are normally more comfortable, although they may be less secure. The others are held in place by being jammed into your ear - and usually prove to be less comfortable.Factors to considerCostThe cost is an obvious issue, something that you really need to think about.Ergonomics1. Check to see if the device is easy to quickly and conveniently put on your ear then takeit off again.2. Are the control buttons on the headset easy to use?3. The headset should be comfortable to wear for long phone calls.4. Can you use it with a pair of glasses?5. Check to see if you can wear it with either ear.6. When you aren't wearing it, you'll need to se how you would carry it with you.7. The weight is important as well, as you don't want something that has the risk of fallingoff.Ease of use.1. The commands and controls should be easy to remember.2. The volume level should be easy to adjust.3. The unit should turn on quickly.4. The manual should be very well written and easy for you to understand.5. There should be a support number for you to call if you should experience any types ofproblems.Features 1. You'll need to know about the battery, the talk time, type, and how to tell when it is going dead or fully charged.2. How many devices can the unit be paired with?3. Compatability is also important, as well as the warranty period.4. Check the sound quality for both sending and receiving audio.5. What type of range does the headset offer you?Other important capabilities include voice tags, last number redial, tranfer calls, 3 way calling, link to other phones, call reject, and mute. You'll also want to note if it looks attractive, and if it's too big or too small.
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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 needs to include the battery and extra functions. This extra size will impact how the headset mounts on or around your ears.Comfort - There seems to be two main styles of headsets for Bluetooth. Some are held into place with a loop around the ear. These styles are normally more comfortable, although they may be less secure. The others are held in place by being jammed into your ear - and usually prove to be less comfortable.Factors to considerCostThe cost is an obvious issue, something that you really need to think about.Ergonomics1. Check to see if the device is easy to quickly and conveniently put on your ear then takeit off again.2. Are the control buttons on the headset easy to use?3. The headset should be comfortable to wear for long phone calls.4. Can you use it with a pair of glasses?5. Check to see if you can wear it with either ear.6. When you aren't wearing it, you'll need to se how you would carry it with you.7. The weight is important as well, as you don't want something that has the risk of fallingoff.Ease of use.1. The commands and controls should be easy to remember.2. The volume level should be easy to adjust.3. The unit should turn on quickly.4. The manual should be very well written and easy for you to understand.5. There should be a support number for you to call if you should experience any types ofproblems.Features 1. You'll need to know about the battery, the talk time, type, and how to tell when it is going dead or fully charged.2. How many devices can the unit be paired with?3. Compatability is also important, as well as the warranty period.4. Check the sound quality for both sending and receiving audio.5. What type of range does the headset offer you?Other important capabilities include voice tags, last number redial, tranfer calls, 3 way calling, link to other phones, call reject, and mute. You'll also want to note if it looks attractive, and if it's too big or too small.
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Connecting Many With Bluetooth
Connecting Many With Bluetooth
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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 enables mobile users to connect to their hands free headset without using wires. Bluetooth technology will also allow mobile phone users to connect with their hands free kit as well.Another handy use of Bluetooth is file sharing. It allows the sharing of files between two cell phones, between a cell phone and computer, which makes the sharing of files a snap. If you have a cell phone and computer, you can easily transfer data between the two.Say for example you wanted to put an MP3 on your phone from your computer you could do it easily with Bluetooth. All you would need is a Bluetooth adapter for your computer. It doesn't stop with the swapping of files either,as you can use your computer and phone to synchronise phone books, send SMS messages, and much more.Although Bluetooth may be dandy for cell phones, it also comes in handy for the home office as well. Utilizing Bluetooth is a great way to set up a home office - two computers, a printer, and even a scanner. They all can be connected using Bluetooth technology with effective ranges of up to 10 meters.The technology and devices of Bluetooth will be around for years and years to come. As years go by, Bluetooth will provide even better wireless solutions for different applications. Even though Bluetooth has a short range, it has that short range for a reason. Bluetooth is easily the best in wireless technology - which it continues to prove time and time again.
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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 enables mobile users to connect to their hands free headset without using wires. Bluetooth technology will also allow mobile phone users to connect with their hands free kit as well.Another handy use of Bluetooth is file sharing. It allows the sharing of files between two cell phones, between a cell phone and computer, which makes the sharing of files a snap. If you have a cell phone and computer, you can easily transfer data between the two.Say for example you wanted to put an MP3 on your phone from your computer you could do it easily with Bluetooth. All you would need is a Bluetooth adapter for your computer. It doesn't stop with the swapping of files either,as you can use your computer and phone to synchronise phone books, send SMS messages, and much more.Although Bluetooth may be dandy for cell phones, it also comes in handy for the home office as well. Utilizing Bluetooth is a great way to set up a home office - two computers, a printer, and even a scanner. They all can be connected using Bluetooth technology with effective ranges of up to 10 meters.The technology and devices of Bluetooth will be around for years and years to come. As years go by, Bluetooth will provide even better wireless solutions for different applications. Even though Bluetooth has a short range, it has that short range for a reason. Bluetooth is easily the best in wireless technology - which it continues to prove time and time again.
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How Bluetooth Works
How Bluetooth Works
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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 must share this band with other RF emitters. This includes automobile security systems, other wireless devices, and other noise sources, such as microwaves.To overcome this challenge, Bluetooth employs a fast frequency hopping scheme and therefore uses shorter packets than other standards within the ISM band. This scheme helps to make Bluetooth communication more robust and more secure.Frequency hopping Frequency hopping is basically jumping from frequency to frequency within the ISM radio band. After a bluetooth device sends or receives a packet, it and the device (or devices) it's communicating with hop to another frequency before the next packet is sent. This scheme offers three advantages: 1. Allows Bluetooth devices to use the entirety of the available ISM band, while never transmitting from a fixed frequency for more than a short period of time. This helps insure that Bluetooth conforms to the ISM restrictions on the transmission quantity per frequency. 2. Ensures that any interference won't last long. Any packet that doesn't arrive safely to its destination can be resent to the next frequency. 3. Provides a base level of security as it's very hard for an eavesdropping device to predict which frequency the Bluetooth devices will use next.The connected devices however, must agree upon the frequency they will use next. The specification in Bluetooth ensures this in two ways. First, it defines a master and slave type relationship between bluetooth devices. Next, it specifies an algorithm that uses device specific information when calculating the frequency hop sequences.A Bluetooth device that operates in master mode can communicate with up to seven devices that are set in slave mode. To each of the slaves, the master Bluetooth device will send its own unique address and the value of its own internal clock. The information sent is then used to calculate the frequency hop sequences. Because the master device and each of the slave devices use the same algorithm with the same initial input, the connected devices will always arrive together at the next frequency that they have agreed upon.As a replacement for cable technology, it's no wonder that Bluetooth devices are usually battery powered, such as wireless mice and battery powered cell phones. To conserve the power, most devices operate in low power. This helps to give Bluetooth devices a range of around 5 - 10 meters.This range is far enough for wireless communication but close enough to avoid drawing too much power from the power source of the device.
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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 must share this band with other RF emitters. This includes automobile security systems, other wireless devices, and other noise sources, such as microwaves.To overcome this challenge, Bluetooth employs a fast frequency hopping scheme and therefore uses shorter packets than other standards within the ISM band. This scheme helps to make Bluetooth communication more robust and more secure.Frequency hopping Frequency hopping is basically jumping from frequency to frequency within the ISM radio band. After a bluetooth device sends or receives a packet, it and the device (or devices) it's communicating with hop to another frequency before the next packet is sent. This scheme offers three advantages: 1. Allows Bluetooth devices to use the entirety of the available ISM band, while never transmitting from a fixed frequency for more than a short period of time. This helps insure that Bluetooth conforms to the ISM restrictions on the transmission quantity per frequency. 2. Ensures that any interference won't last long. Any packet that doesn't arrive safely to its destination can be resent to the next frequency. 3. Provides a base level of security as it's very hard for an eavesdropping device to predict which frequency the Bluetooth devices will use next.The connected devices however, must agree upon the frequency they will use next. The specification in Bluetooth ensures this in two ways. First, it defines a master and slave type relationship between bluetooth devices. Next, it specifies an algorithm that uses device specific information when calculating the frequency hop sequences.A Bluetooth device that operates in master mode can communicate with up to seven devices that are set in slave mode. To each of the slaves, the master Bluetooth device will send its own unique address and the value of its own internal clock. The information sent is then used to calculate the frequency hop sequences. Because the master device and each of the slave devices use the same algorithm with the same initial input, the connected devices will always arrive together at the next frequency that they have agreed upon.As a replacement for cable technology, it's no wonder that Bluetooth devices are usually battery powered, such as wireless mice and battery powered cell phones. To conserve the power, most devices operate in low power. This helps to give Bluetooth devices a range of around 5 - 10 meters.This range is far enough for wireless communication but close enough to avoid drawing too much power from the power source of the device.
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