The majority of people still associate Bluetooth with the data transmission capabilities of the Nokia era. The cell phone did not have WiFi or 4G at the time, and Bluetooth was used for file transfers because the files were not very huge. As WiFi and 5G have gained prominence, Bluetooth has slowly fallen out of favor. Despite this, Bluetooth continues to be an essential component of modern smartphones. Bluetooth is crucial for wireless device pairing as well as for controlling devices remotely. Bluetooth has evolved into an essential component of mobile phones, particularly at this moment when wireless headset sales are rising quickly globally. The Bluetooth application landscape is evolving along with the times.In the future, Bluetooth may also be used for precise positioning.

The birth of Bluetooth 5.1

The Bluetooth Technology Alliance (SIG) formally unveiled Bluetooth 5.1 technology on January 29, 2019. According to the introduction in the blog post, Bluetooth 5.1 will expand on Bluetooth 5.0 by adding a new "direction finding function," and Bluetooth proximity technology will make it simpler to find and recognize the device. To enable positioning in small Bluetooth devices, increase Bluetooth positioning precision to the centimeter level. When you misplace a little Bluetooth accessory like AirPods, it will be simpler to locate if you do it in this manner. Of course, Bluetooth 5.1's direction-finding feature may be utilized for more than just locating objects; it can also enhance indoor navigation, deliver information, and serve other functions.

Prior to this, the Bluetooth Technology Alliance added proximity sensing technology to the already existing Bluetooth technology specifications, enabling users to actively make sounds, locate objects by using the connection (relative) distance of other Bluetooth devices, and estimate their locations. Users of the method can verify the precise position of the Bluetooth gadget they're looking for. The direction-finding feature in Bluetooth 5.1 will make this perceptual technology more practical.

The main functions of Bluetooth 5.0 are as follows:

• Bluetooth 5.0 is aimed at low-power devices, has a wider coverage and a four-fold increase in speed compared to the current one.
• Bluetooth 5.0 will add an indoor positioning assistance function, and combined with Wi-Fi, indoor positioning with an accuracy of less than 1 meter can be achieved.
• The upper limit of the transmission speed is 24Mbps, which is twice that of the previous 4.2LE version.
• The transmission level reaches the lossless level
• The effective working distance can reach 300 meters, which is 4 times that of the previous 4.2LE version.
• Add the navigation function, you can achieve 1 meter indoor positioning.
• To meet the needs of mobile clients, it has lower power consumption and is compatible with older versions.

A new direction is provided by Bluetooth 5.1. The standard offers numerous functions, including GATT caching, random ads, and periodic advertisement synchronization, with positioning accuracy of less than one meter. Combining these qualities can result in connections that are quicker and use less power, less packet collisions, improved packet error rates (PER), and better energy management. Although Bluetooth 4.x provides Bluetooth mesh networks and beacons (for asset tracking), Bluetooth 5.1's scalability makes it ideal for the aforementioned existing use cases.
The two key benefits of Bluetooth 5.2 are time-limited data communication and a more effective connection with less battery usage. Multiple devices can interact with audio transmission through low energy (LE) synchronization channels, and LE power control can maximize the transmitter's power. These characteristics let Bluetooth devices work more harmoniously with other 2.4 GHz wireless devices and significantly enhance user experience.

What is the improvement of tws earbuds using bluetooth 5.1？

New Upgraded 5.1 Chip: stable full-core upgrade, compared with the old version of Bluetooth 5.0, the transmission distance is greatly improved, the signal stability and anti-interference ability are enhanced, and the standby power consumption is reduced.

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