NB-IoT (Narrowband Internet of Things) is able to meet the needs of low-energy-consuming devices that rely on batteries to connect and send small amounts of information with low power consumption, low cost, and wide coverage. More and more, it is used in the Internet of Things industry. With the increase of indoor coverage, cost reduction and energy consumption of this new technology, the smart home industry has also explored the application of NB-IoT technology. On July 27th, Haier took the lead in “New IoT, New The scene, the new ecology - the smart home industry NB-IoT application promotion summit forum, jointly developed the first smart home NB-IoT standard, released the smart home industry's first NB-IoT solution - NB-UHomekit, and The on-site demonstration covers three complete NB-IoT commercial solutions for smart appliances, smart communities and commercial appliances. Let's take a look at the reporter's interview with Fan Jiqing, Director of Haier U+ Development, to find out how NB-IoT integrates with smart homes.
First, the technical backgroundDirector Fan Jiqing first introduced the development of NB-IoT technology. He said that wireless communication has developed rapidly in recent years due to its convenient and convenient innate advantages. It has not only been widely used in business, but also has been greatly developed in military applications. As the content of services provided by the network has become more and more abundant, the information processing capability of communication terminals has also been strengthened. The services such as mobile office and mobile shopping have finally turned from fantasy to reality. Smart home appliances have also entered the homes of ordinary people. Among various wireless communication technologies, technologies such as Wi-Fi, Bluetooth, Zigbee, and cellular mobile communication technologies are widely used in smart home smart homes. As the requirements for intelligence become higher and higher, there are more and more types of connected devices, and the demand is also diversified. At present, high-speed use of 3G, 4G communication systems can be satisfied, medium-rate use of 2G communication can be satisfied, low-rate has not yet perfected low-power cellular application standard protocol. 4G, 3G, and 2G cannot meet the requirements of low power consumption, low cost, wide coverage, and large capacity. Lora, Sigfox, WiFi, Bluetooth, and ZigBee have defects in information security, mobility, coverage, and capacity.
In order to meet the development needs of the Internet of Things, narrow-band IoT communication standards have emerged.
Comparison of advantages and disadvantages of wireless communication technology commonly used in smart home appliances, see the following table
At present, China's smart home market has a certain scale, but in the view of most ordinary consumers, the convenience of living brought by smart home is still a "icing on the cake." Director Fan Jiqing summarized the challenges faced by the current development of the smart home industry. He believes that there are four main aspects.
(1) Operational convenienceThe purpose of smart home is to make people enjoy life and make life easier. However, due to technical characteristics, most smart home appliances, smart home networking, binding, and use have certain difficulties. Originally, I wanted to enjoy a more convenient and more comfortable life, but the complicated operation made the use difficult, which seriously affected the user experience.
How to make the operation simpler, the function is more acceptable and dependent on the user, is the first challenge facing the industry.
(2) Network capacity and signal coverageThe home environment is very different. When the number of smart devices reaches a certain number, the communication between them will be affected, which will affect the normal use of the equipment. The network coverage of large houses such as duplex or villas is a challenge that the smart home industry must face. It is difficult to communicate with water heaters, washing machines, etc. in wireless networks such as balconies and bathrooms.
(3) Security risksNetwork security is a must for the communications industry, and smart homes are also facing this problem. How to balance trade-offs between convenience and security is a problem that every vendor has to face.
(4) Standards are not uniformBecause the standard system is not mature, different brands of smart home appliances can not identify each other and communicate with each other. Smart home appliances Smart home is a device in the user's home. It is an APP in the hands of users, behind which is a complex cloud platform service system. The investment in designing and developing smart home appliances is huge, and it is difficult to see results in a short time. Therefore, it is a huge challenge for some small and medium-sized enterprises. The design of smart home appliances has a large investment, long cycle and many problems.
Director Fan Jiqing believes that how to face challenges and overcome difficulties in designing simple and easy-to-use smart home appliances is a common problem facing the entire industry.
Third, NB-IoT solution - NB-UHomeKitThe emergence of the NB-IoT technology standard provides a very good solution for low-rate, low-power, wide-area network applications, and is a good complement to the current device access technology. Based on the technical characteristics of NB-IoT and combined with years of experience in the field of smart home appliances, Haier U+ designed and completed the complete NB-IoT access solution, NB-UHomeKit, and provided it to the industry.
Director Fan gave a detailed introduction to Haier NB-UhomeKit open source application solution. He mentioned that NB-UhomeKit is a solution for Haier U+ Smart Life Platform to access U+ platform using NB-IoT technology to realize smart home appliances and home design applications. Protocol standard.
NB-UhomeKit consists of: the device-side SDK, the client SDK, and the M2M access gateway;
The NB-UhomeKit system framework is as follows:
The technical advantages of NB-UhomeKit include the following five points:
1) Dedicated compression algorithm: to solve the contradiction between the small traffic of NB-IoT technology and the big data demand of smart home;
2) Dedicated data acquisition algorithm: solve the contradiction between the low rate of NB-IoT technology and the real-time demand of smart home;
3) Standard protocol: solve the problem of interconnection;
4) National security standards: resolve conflicts between security requirements and ease of use;
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