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SIG estimates that there will be 1.1 billion Bluetooth devices per year in 2020

The Bluetooth Technology Alliance officially announced in July this year that it will begin to support the Bluetooth mesh network. It will extend the one-to-one and one-to-many transmission methods of Bluetooth in the past to many-to-many, and even cover thousands of nodes, greatly improving coverage. In the future, Bluetooth mesh technology will be applied to application scenarios such as building automation, sensor networks, and asset tracking. Since Bluetooth mesh is still an emerging wireless transmission method, the volume of discussion may not reach a certain level of heat at this stage. However, with its many excellent transmission performances, it is expected that the market growth will be very fast in the future. For example, the market will It is estimated that by the year 2020, in the smart building market, it will reach an annual capacity of 1.1 billion units.

Bluetooth mesh mesh technology can be connected in series for thousands of IoT devices in the future.
In the new era of the Internet of Everything, the market demand for device networking is becoming more and more diverse, and traditional one-to-one, one-to-many devices are not available for transmission. Therefore, many-to-many device transmission communication methods are now more and more widely used in wireless network transmission scenarios. In response to market demand, the Bluetooth Technology Alliance officially announced the Bluetooth mesh network based on Bluetooth low energy technology this year, and held a press conference today (5) to further explain the latest development and future layout of Bluetooth mesh technology. Ken Kolderup, vice president of global marketing for the Bluetooth Technology Alliance, said that the advent of Bluetooth mesh technology will further help the future of emerging markets to flourish.
The external impression of traditional Bluetooth is nothing more than short-distance point-to-point audio transmission, and the low-power Bluetooth technology developed later can be used for point-to-point transmission of data, and can also be used for broadcast one-to-many transmission. A major breakthrough in the new generation of Bluetooth mesh technology is the elimination of node limitations, allowing thousands of devices to communicate with each other. It is reported that among the Bluetooth mesh technical specifications, a single network can support up to 32,000 nodes, and in the existing market, there are already more than a thousand nodes in the network sub-category, and thousands of nodes have been connected to the entire family and office building. And even the entire factory is covered in the transmission range. And especially in commercial and industrial environments, where high-density lighting and sensors are often required, the communication performance of a large-scale installation network can be improved. This technology can be designed specifically for the needs of such large-scale networks. .
But from one-to-one, one-to-many, to the deployment of thousands or even tens of thousands of nodes, will this be a challenge for Bluetooth mesh technology? In a press conference, Ken Kolderup pointed out that the challenge of deploying Bluetooth mesh technology is not the continuous increase of nodes, but the “density” of nodes in the same environment. Bluetooth meshes can handle more in a single space. Nodes can also maintain stable performance, which is the difficulty for the future of Bluetooth mesh technology to overcome and challenge.
The Bluetooth Technology Alliance further states that Bluetooth mesh technology uses peer-to-peer communication, and all nodes can communicate with each other directly, rather than via routing nodes, which can avoid single point of failure affecting the quality of the entire network. In addition, because of the multi-path message forwarding architecture, in addition to simpler subordinates and management, it also has built-in multiple paths and self-healing capabilities to make message delivery more stable. As for the most criticized interoperability issues in the IoT architecture, the Bluetooth Technology Alliance also said that the new technology has now completed multi-brand interoperability testing to ensure that products from different brands can work smoothly.
Although Bluetooth mesh is still in early use, the Bluetooth Technology Alliance has been the first to estimate that the three application domains will benefit from this new technology in the future, including building automation, sensor networks and asset tracking. The Bluetooth Technology Alliance further pointed out that in the building automation scenario, building control and automation systems can be combined with Bluetooth mesh technology to more intelligently control lighting, temperature and security. The sensor network is mainly used in factories. By deploying a large number of wireless sensors, it can be used to monitor temperature, humidity and vibration, and predict machine maintenance time to avoid temporary shutdown. As far as asset tracking is concerned, hospitals can use Bluetooth mesh to track expensive mobile medical devices and avoid asset theft.

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