The official said that the new Bluetooth 5.0 standard will far exceed the current version, that is, the Bluetooth 4.2LE version, including 4 times the effective transmission distance will be 4.2LE version, that is, in theory, Bluetooth transmission and reception The effective working distance between the devices can reach 300 meters. The transmission speed is twice that of the 4.2LE version, and the speed limit is 24Mbps.
In fact, the release of Bluetooth 5 is no less important than the release of the 5G standard, because in our daily life, Bluetooth technology is everywhere, mobile phones, headphones, smart watches, smart bracelets, smart table lamps, smart rice cookers, etc. Too many smart hardware devices are actually transmitted using Bluetooth technology.
The past and present of Bluetooth technology
In the past 20 years, Bluetooth technology has launched 10 versions on the standard, and its technology and functions have gradually improved.
Bluetooth 1.0: Obtained the COMDEX "Best Display Technology Award" in the past, and then the first Bluetooth-based printers, notebooks, hands-free car kits and other products have come out.
Bluetooth 1.1: The transmission rate is about 748 to 810 kilobytes per second (kb/s). Because of its early design, it is susceptible to interference from products of the same frequency and affects communication quality.
Bluetooth 1.2: It is a milestone of Bluetooth technology. Starting from this generation of Bluetooth technology, Bluetooth communication has greatly improved in terms of transmission speed, anti-interference and security.
Bluetooth 2.0: A modified version of Bluetooth 1.2 with a transfer rate of about 1.8 megabytes to 2.1 megabits per second. It starts to support duplex mode, which means that voice communication can also transmit files and high-quality images.
Bluetooth 2.1: The biggest improvement in this version is to increase the scan interval of devices that need to continuously transmit data streams from 0.1 seconds to 0.5 seconds, so the power consumption is lower and the startup is faster.
Bluetooth 3.0: Released in April 2009, Bluetooth 3.0 adopts a new alternating RF technology, which is 8 times faster than Bluetooth 2.0. It can be easily used for data from VCR to HDTV, PC to PMP, UMPC to printer. transmission.
Bluetooth 4.0: If the previous Bluetooth technology was an ordinary "feature phone", then Bluetooth 4.0 turned on the "smart phone" era. Bluetooth 4.0 is the only comprehensive protocol specification for Bluetooth since its birth. It proposes three modes: “Low Power Bluetooth”, “Traditional Bluetooth” and “High Speed ??Bluetooth”. High-speed Bluetooth focuses on data exchange and transmission; traditional Bluetooth focuses on information communication and device connection; low-power Bluetooth, as its name suggests, is based on devices that do not require too much bandwidth. These three protocol specifications can also be combined with each other to achieve a wider range of application modes. At this time, Bluetooth 4.0 has increased the transmission distance to more than 100 meters.
Bluetooth 4.1: Released in December 2013, Bluetooth 4.1 is faster and more intelligent, which not only reduces the time for reconnection between devices, but also supports breakpoint retransmission. The transmission efficiency is also greatly improved. For example, users can connect multiple devices. Wear the device, and the information between each other can be sent to the receiving device instantly.
Bluetooth 4.2: Promulgated in December 2014, it improves data transmission speed and privacy protection. Devices can access the Internet directly through IPv6 and 6LoWPAN. Under the new standard, Bluetooth signals want to connect or track user devices must be user-approved and faster, and the data transfer speed between the two Bluetooth devices is increased by 2.5 times.
Bluetooth 5.0: Released in 2017, its low-power connection distance and speed will be increased by 4 times and 2 times respectively, while the connectionless broadcast data transmission volume will be increased by 8 times.
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