The emergence of the Internet of Things has made life and production more convenient, and at the same time, it has also provided a huge market demand for industrial development. Relevant data show that after the scale of the Internet of Things industry exceeded the trillion mark in 2018, after just two years of development, the industrial scale has reached 2 4 trillion by the end of 2020.
Not long ago, the Ministry of Industry and Information Technology, the Cyberspace Administration of China and other 8 departments jointly issued the "Three-year Action Plan for the Construction of New Infrastructure of the Internet of Things (2021-2023)", which put forward four major actions and 12 key tasks, which clearly pointed out that by the end of 2023, the new infrastructure of the Internet of Things will be initially built in major cities in China, pointing out a clear direction for the development of the Internet of Things.
Overall, the IoT market is growing rapidly, but with the gradual expansion of the scale of connected devices, the deployment of IoT devices has encountered a lot of bottlenecks, and the limited power supply is one of the most representative challenges. The traditional wired power supply mode can no longer meet the deployment requirements of diverse application scenarios. Therefore, most IoT terminal devices rely on batteries to power them, but this not only increases the deployment cost of sensing nodes, but also puts a burden on the environment from a large number of replaced waste batteries.
In the face of hundreds of billions of connections in the future, the Internet of Things urgently needs a more stable, continuous and reliable power supply solution to break the current battery power supply dilemma, and the passive (battery free) Internet of Things is the best answer.
Passive IoT without electricity.
Passive (battery-free) Internet of Things can be simply understood as the Internet of Things that does not require electricity, but the end node of the Internet of Things, as an electronic component, itself needs energy to operate. Passive IoT can support the perception, transmission and distributed computing of the device's own data by collecting scattered energy in the environment.
In fact, as early as 2014, the National Natural Science ** officially launched the key project of "Basic Theory and Key Technology of Passive Perception Network", with a funding amount of 3.5 million yuan, hoping to find a new path in the direction of sensing, but due to the constraints of technology at that time, the results of the project were limited.
Nowadays, with the continuous upgrading and development of semiconductor and energy conversion technology, the call for passive Internet of Things is getting louder and louder in the entire industry. In August this year, at the 5G Advanced Innovation Industry Summit held by Huawei and China Mobile, Wang Tao, Executive Director of the Board of Directors and President of ICT Products & Solutions of Huawei, also proposed the direction of 5G technology evolution, and passive Internet of Things (DOT) is one of them.
Although the industrial application of passive Internet of Things technology started late in China, with the continuous promotion of the industry, more and more passive applications have begun to attract the attention of the market, and many cutting-edge science and technology enterprises have gradually joined it.