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Bluetooth is so hard to use, why hasn't it been replaced?

via:驱动之家     time:2021/5/29 0:24:37     readed:283

When it comes to Bluetooth technology, I believe most people's first reaction is Bluetooth headset. To be sure, as the first Bluetooth device that people come into contact with, the Bluetooth headset has contributed a lot. By applying the Bluetooth technology to the hands-free headset, users can experience the trouble of no wires for the first time.

In the past few years, with the rapid development of smart phones, wearable devices and the Internet of things, coupled with the popularity of TWS Bluetooth headsets in recent two years, the development of Bluetooth industry has also entered a fast lane. On April 15, Bluetooth Technology Alliance released the latest information of Bluetooth market in 2021. The report predicts that although the growth rate of Bluetooth market has slowed down in the past year, However, it is estimated that by 2025, the annual shipment of Bluetooth devices will increase from 4 billion in 2020 to more than 6 billion.

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Interestingly enough, the term Bluetooth comes from Harald Bluetooth, the name of King Harald of Denmark in the 10th century. And it was Jim kardach, an engineer from Intel, who connected Bluetooth with the later wireless communication technology standard. He proposed Bluetooth as the name of wireless communication technology standard at a wireless communication industry conference. In 1998, Ericsson, together with IBM, Intel, Nokia and Toshiba, formed the predecessor of Bluetooth technology alliance.

There is no doubt that Bluetooth is the most popular and convenient mainstream technology.

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But the early Bluetooth technology is really not easy to use.Not only the transmission rate is not high, but also the security problem. In the 4.0 era, Bluetooth transmission technology has been greatly improved, and it is also the first Bluetooth integrated protocol specification, which integrates the three specifications. One of the most important changes is the low power function of ble, which puts forward three modes: Low Power Bluetooth, traditional Bluetooth and high speed Bluetooth.

After entering the 5.0 era, Bluetooth technology has completely opened the door of the Internet of things era. In the low-power mode, it has faster and farther transmission capacity. The transmission rate is twice that of Bluetooth 4.2 (the upper limit is 2Mbps), the effective transmission distance is four times that of Bluetooth 4.2 (theoretically 300m), and the packet capacity is eight times that of Bluetooth 4.2. Support indoor positioning and navigation function, combined with WiFi can achieve indoor positioning accuracy less than 1 meter. At the same time, the underlying optimization of IOT is carried out in order to serve smart home with lower power consumption and higher performance.

Now that we're talking about it, some people may want to ask, why is Bluetooth still used when Bluetooth technology was born so long and wireless technology is developing so rapidly?

In fact, Bluetooth does have two rivals that can't be ignored: Wi Fi and NFC.

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Obviously, because of its own distance limitation, NFC can not replace Bluetooth, but complement each other, so there is not much threat to Bluetooth.

Take another look at Wi Fi,Compared with NFC, Wi Fi has no distance limit and is similar to Bluetooth in many aspects, so it is more threatening.Wi Fi direct connection function has been applied by many devices, such as Sony QX series wireless lens, SONOS speaker, etc., involving printing, games, video, music, display and other fields. In addition, compared with Bluetooth's 24mbps transmission rate, Wi Fi can achieve a maximum speed of 250mbps, and is expected to achieve 2GB of data transmission per second in the future, which is one of the advantages that Bluetooth can't match.

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So why doesn't Wi Fi replace Bluetooth?

The answer is very simple. An important problem of Wi Fi is high power consumption, which is not suitable for wearable, fitness and other devices that need low power transmission.But for the home field, such as wireless speaker, video synchronous transmission and other fields, Wi Fi obviously has more advantages. For devices like smart bracelets, Bluetooth is the most secure solution.

Obviously, after 20 years of development, Bluetooth technology has a lot of fans, and the technology is constantly improving. Manufacturers are still optimistic about Bluetooth technology. The low cost, high performance, simplicity and universality of Bluetooth are the favorite parts of manufacturers.

At the same time, Bluetooth also has an area worthy of attention, that is device network, which is mainly promoted by mesh based network technology, and can be widely used in many industrial scenes such as intelligent lighting and intelligent buildings. It is reported that Bluetooth technology alliance also plans to launch mesh operation enhancement function in the near future, so that mesh can be better applied to many fields.

Are you ready to be changed by Bluetooth?

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- THE END -

Bluetooth

Link to the original text:Zhongguancun Online

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