The goal is to achieve the highest data transmission speed of 1Mbps (effective transmission speed of 721kbps), the maximum transmission distance of 10 meters, the user does not have to be permitted to use the 2.4GHz ISM (Industrial, Scientific, Medical) band, on which the establishment of 79 channels with a bandwidth of 1MHz, with the frequency of 1,600 switching per second, the hobbing () method. Hobbing) way of spectrum diffusion technology to realize the sending and receiving of radio waves. This is the origin and characteristics of Bluetooth technology. Devices that communicate using Bluetooth technology are divided into a "calling party" that decides the frequency of the hobbing mode and its communication counterpart, the "receiving party". The calling party can communicate with 7 receiving parties at the same time. Therefore, it is possible to connect the caller and seven recipients***8 devices into a subnet called Piconet (sawtooth network), and the recipients in a Piconet can be the recipients of more than two Piconets at the same time. in July 1999, Bluetooth announced the official specification of BluetoothVersion 1.0, and cell phones and notebook PCs complying with this specification will be available by the end of 1999 or 2000, and will be available by the end of the year. laptops will be available in late 1999 or early 2000. The number of companies claiming to productize Bluetooth technology is growing, with membership in the Bluetooth standardization group, the BluetoothSIG (Special Interest Group), now numbering more than 800.
"Bluetooth" technology is designed to smart cell phones and laptops, handheld computers, and a variety of digital information devices can no longer use cables, but a small, low-cost wireless communications technology to connect up; and then form a personal side of the network, so that a variety of information technology within the scope of the mobile portable devices can be seamlessly realize the resources **** enjoy. According to foreign authorities expect, a few years later, the world will have hundreds of millions of digital cell phones, PCs and a variety of information equipment will be based on Bluetooth technology wireless interface as a standard configuration. Bluetooth technology will be in a variety of areas of rapid development, its typical application environment, including wireless office environment (Wireless Office), the automotive industry, medical equipment, etc. Bluetooth will play an important role in people's daily lives and work, the market potential is huge, the technology is becoming the 21st century investment hot spot.
The so-called Bluetooth (Bluetooth) technology, in fact, is a short-range wireless communication technology, the use of "Bluetooth" technology, can effectively simplify the Pocket PCs, notebook computers and cell phones and other mobile communication terminal equipment, communication, but also successfully simplify the above equipment and the Internet communication, so as to simplify the communication between the above equipment and the Internet. It can also successfully simplify the communication between these devices and the Internet, thus making the data transmission between these modern communication devices and the Internet more rapid and efficient, and widening the way for wireless communication. To put it plainly, is that Bluetooth technology makes modern some easy to carry mobile communication equipment and computer equipment, do not have to resort to cables can be networked, and can be realized on the Internet wirelessly, and its actual scope of application can be expanded to a variety of home appliances, consumer electronics and automobiles, and other information appliances, composed of a huge wireless communication network.
"Bluetooth" is the formation of the background is this: in May 1998, Ericsson, Nokia, Toshiba, IBM and Intel Corporation and other five well-known manufacturers, in the joint standardization of short-range wireless communications technology activities proposed the Bluetooth technology, its purpose is to provide a short-range, low-cost wireless transmission The purpose was to provide a short-range, low-cost wireless transmission technology for applications. These five vendors also established the Bluetooth Special Interest Group to enable Bluetooth technology to become the future standard for wireless communications. Chip juggernaut Intel was responsible for the development of semiconductor chips and transmission software, Ericsson was responsible for the development of wireless RF and cell phone software, and IBM and Toshiba were responsible for the development of interface specifications for notebook computers.In the second half of 1999, well-known industry giants Microsoft, Motorola, Sankon, Lucent, and the five Bluetooth Special Interest Group companies*** co-sponsored the establishment of the Bluetooth Technology Promotional Organization (BTPO), thereby creating a The world set off a wave of "Bluetooth" boom. The global industry is about to develop a large number of Bluetooth technology applications, so that Bluetooth technology presents an extremely broad market prospects, and predicts that the beginning of the 21st century will usher in a magnificent wave of global wireless communications.
What is Bluetooth?
Bluetooth (Bluetooth) is by Toshiba, Ericsson, IBM, Intel and Nokia in May 1998 **** with the proposed close-range wireless data communications technology standards. It can realize single-point-to-multipoint wireless data and sound transmission within a 10-meter radius, with a data transmission bandwidth of up to 1 Mbps. The communication medium is an electromagnetic wave with a frequency between 2.402 GHz and 2.480 GHz.
Bluetooth communication technology features
■Bluetooth work in the global open 2.4GHz ISM (i.e., industrial, scientific, medical) band;
■Using frequency-hopping spectrum expansion technology, the frequency band is divided into a number of frequency-hopping channels (hop channel), in a connection, the radio transceiver according to a certain code sequence constantly from a channel "hopping" from one channel to another;
■A Bluetooth device can establish a connection with seven other Bluetooth devices at the same time;
■Data transfer rate of up to 1Mbit/s;
■Low power consumption, communication security is good;
■In the effective range of the obstacles can be crossed for Connection, there is no special communication perspective and direction requirements;
■Support voice transmission;
■Simple and convenient networking
Bluetooth communication technology
Bluetooth technology is an emerging technology, has not yet been put into widespread use, many Bluetooth devices are still in the laboratory test phase. However, it is certain that most of the devices with infrared wireless data communication function, in the future as well as the use of Bluetooth technology to realize the wireless connection. At the same time, the network characteristics of Bluetooth technology and voice transmission technology so that it can also realize the infrared technology can not be achieved in some specific functions, such as wireless phones, multi-device networking and so on.
Manufacturers and consumer acceptance
Bluetooth technology has gained the response of more than two thousand enterprises, thus having a huge development and production capacity. Bluetooth has already possessed a high degree of popularity, and the majority of consumers are very interested in this technology.
Implantation cost
Currently on the market Bluetooth devices are still relatively rare. USB interface Bluetooth adapter, Bluetooth PC card and Bluetooth cell phone have been market-oriented products, the price is very high. This shows that the early development stage of Bluetooth implantation costs are still relatively high. However, it is estimated that the implantation cost can be below 30 dollars after batch production. In the period of mature development of Bluetooth technology, the implantation cost should be able to control within 10 U.S. dollars.
Bluetooth is a kind of infinite short-range transmission technology, just like the infrared technology.
The superiority of Bluetooth over infrared is that it has a long transmission distance (ranging from 10 meters to 100 meters) and a fast transmission speed. The latest Bluetooth standard is now version 1.2.
With Bluetooth you can update your ringtones, screensavers and games, a good choice for personalization of mobile phones
★Bluetooth is a low-cost, high-capacity, short-range wireless communication specification. A Bluetooth-enabled laptop is a laptop computer with Bluetooth wireless communication capabilities. Bluetooth this name there is a legendary story it. In the 10th century A.D., the Nordic vassals fight for supremacy, the Danish king stepped forward, in his tireless efforts, the bloody war was stopped, all parties are sitting at the negotiation table. Through communication, the lords released their differences and became friends. Since the King of Denmark loved to eat blue plums so much that his teeth were stained blue, he was known as King Bluetooth, so Bluetooth became synonymous with communication. Today, a thousand years later, when a new wireless communication specification was introduced, people again used Bluetooth to name it.
In 1995, Ericsson was the first to introduce the Bluetooth concept. The Bluetooth specification uses the microwave frequency band to work, with a transmission rate of 1M bytes per second and a maximum transmission distance of 10 meters, which can be up to 100 meters by increasing the transmit power. Bluetooth technology is globally open and has good compatibility on a global scale, and the world can be connected through a low-cost invisible Bluetooth network.
Bluetooth technology is not only used in computers, like cell phones, digital cameras, camcorders, printers, fax machines, home appliances, and many other electronic devices can be used Bluetooth technology to achieve wireless connectivity, without having to drag a tail (connecting wire). With the popularization of Bluetooth technology, home improvement is no longer for the wiring of electrical appliances and worry; the use of home appliances, do not have to for a whole lot of remote control and headache, a cell phone or a car key will be able to get everything done; out of the company's work, the root of the work Tuyi Kinglandz said the curtain? Simply ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly ugly The most important thing to remember is that you have to be able to get the best out of it. What is the best way for you to get the most out of your life? What is the best way to get the most out of your life? What is the best way to get the most out of your life? The first thing you need to do is to get your hands dirty. No penalty; car hands-free system to answer the phone is more convenient, but inevitably there are inconvenient phone calls at an inconvenient time to call in; the use of wired headphones is not very cool, headphone cable around the swaying impact on the arm's activities, headphone cable shielding effect is poor often subject to electromagnetic noise interference, thrown in the passenger seat of the cell phone is also often when getting off the headphone cable clamped in the clothes torn to the ground ... ... ... let a person fire, accidentally but also to the injured car tears.
The Bluetooth headset used with a cell phone can make these troubles go away with the wind and make driving safer. By having Bluetooth-enabled earbuds, it allows cell phone users to have wireless hands-free functionality without having to dangle a cord from their head to their phone as they do now. Users can also use their cell phones through in-car Bluetooth communication devices, allowing them to make calls without having to pull their phones out of their bags.
Sony Ericsson has even gone so far as to advertise its Bluetooth technology with a nifty Bluetooth-enabled remote-controlled car, the Car100, which has a built-in battery but no special charger. Charging is done using Sony Ericsson's cell phone, and the charging process is actually charging the phone's power to the top of the Car100. The Car100's in-face control chip can be seen through the cockpit, showing a strong technological flavor.
Four points of guidance
One, drivers who use Bluetooth headsets will feel very free. Whether it's backing up and looking around, or turning around to get something out of the backseat after parking, it's very convenient to answer calls while driving without any attachment;
2. Bluetooth headset has good voice quality, sometimes even clearer than directly answering a cell phone's call.
Three, the beginning of wearing will be a little uncomfortable, may be the user to the ear plugs are too tightly plugged, make it seem like a good separation of what, can not hear the surrounding sound. As long as the earplugs are pulled slightly apart and gently fastened to the earholes, there is no longer a problem.
Four, revealing a way to ensure the effectiveness of the call - always keep the Bluetooth headset and cell phone on the same side of the body, so the call is the best, that is, if the Bluetooth headset hangs in the right ear, you can put the phone also on the right side of the body; and vice versa.
Bluetooth is a low-cost, high-capacity short-range wireless communication specification. Bluetooth laptops are laptops with Bluetooth wireless communication capabilities. The name Bluetooth also has a legendary story. In the 10th century A.D., the Nordic vassals were fighting for supremacy, and the King of Denmark stepped forward, and under his tireless efforts, the bloody war was stopped, and all parties sat down at the negotiation table. Through communication, the lords released their differences and became friends. Since the King of Denmark loved to eat blue plums so much that his teeth were stained blue, he was known as King Bluetooth, so Bluetooth became synonymous with communication. Today, a thousand years later, when a new wireless communication specification was introduced, people again used Bluetooth to name it.
In 1995, Ericsson was the first to introduce the Bluetooth concept. The Bluetooth specification uses the microwave frequency band to work, with a transmission rate of 1M bytes per second and a maximum transmission distance of 10 meters, which can be up to 100 meters by increasing the transmit power. Bluetooth technology is globally open and has good compatibility on a global scale, and the world can be connected through a low-cost invisible Bluetooth network.
Bluetooth technology is not only used in computers, like cell phones, digital cameras, camcorders, printers, fax machines, home appliances, and many other electronic devices can be used Bluetooth technology to achieve wireless connectivity, without having to drag a tail (connecting wire). With the popularization of Bluetooth technology, home improvement is no longer for the wiring of electrical appliances and troubles; the use of home appliances, do not have to a large number of remote controls and headaches, a cell phone or a car key can be all done; go out, the company's work arrangements and home loved ones of the screen can be obtained at any time and place; playing cards, payment without queuing up from the payment point near the past, do not have to go in to the door can be easily completed! ...... The wide application of Bluetooth technology will make our life incomparably easier.
At present, Bluetooth technology is most widely used in daily life is in support of Bluetooth cell phone call equipment, such as cell phone Bluetooth headset, Bluetooth to make driving safer, many car owners feel that it is inconvenient to drive when answering the phone: a hand holding the steering wheel, the other hand holding up the phone to answer, not only hindering the gear shift, affecting the safety of the two eyes staring at the front of the car also have to look around for the police, 12 points really! No penalty; car hands-free system to answer the phone is more convenient, but inevitably there are inconvenient phone calls at an inconvenient time to call in; the use of wired headphones is not very cool, headphone cable around the swaying impact on the arm's activities, headphone cable shielding effect is poor often subject to electromagnetic noise interference, thrown in the passenger seat of the cell phone is also often when getting off the headphone cable clamped in the clothes torn to the ground ... ... ... let a person fire, accidentally but also to the injured car tears.
The Bluetooth headset used with a cell phone can make these troubles go away with the wind and make driving safer. By having Bluetooth-enabled earbuds, it allows cell phone users to have wireless hands-free functionality without having to dangle a cord from their head to their phone as they do now. Users can also use their cell phones through in-car Bluetooth communication devices, allowing them to make calls without having to pull their phones out of their bags.
Sony Ericsson has even gone so far as to advertise its Bluetooth technology with a nifty Bluetooth-enabled remote-controlled car, the Car100, which has a built-in battery but no special charger. Charging is done using Sony Ericsson's cell phone, and the charging process is actually charging the phone's power to the top of the Car100. The Car100's in-face control chip can be seen through the cockpit, showing a strong technological flavor.
Four points of guidance
One, drivers who use Bluetooth headsets will feel very free. Whether it's backing up and looking around, or turning around to get something out of the backseat after parking, it's very convenient to answer calls while driving without any attachment;
2. Bluetooth headset has good voice quality, sometimes even clearer than directly answering a cell phone's call.
Three, the beginning of wearing will be a little uncomfortable, may be the user to the ear plugs are too tightly plugged, make it seem like a good separation of what, can not hear the surrounding sound. As long as the earplugs are pulled slightly apart and gently fastened to the earholes, there is no longer a problem.
Four, revealing a way to ensure the effectiveness of the call - always keep the Bluetooth headset and cell phone on the same side of the body, so that the call is the best, that is, if the Bluetooth headset hanging in the right ear, the phone can also be placed on the right side of the body; and vice versa.