In terms of indoor positioning services, China's optical communications industry has taken the lead. “Now, the navigation software on the market is getting more and more accurate, but it is limited to outdoor. From the perspective of commercial applications, the 'last 1km' of 'indoor' is equally important.” General Manager of Huace Optical Communication Technology Co., Ltd. Fu Qiang told reporters that the current indoor positioning market uses more WiFi and Bluetooth technology, but the WiFi positioning error is usually as high as 5 meters to 10 meters, and the Bluetooth positioning also has an error of 3 meters to 5 meters. The white light communication technology independently developed by Huace has a positioning accuracy of up to 1 meter, which solves the problem of accurate indoor positioning.

In the corridor of Huace Optical Communications, the reporter experienced an optical communication technology. Standing in the aisle more than 1 meter wide, the reporter tried to approach the walls on both sides, so that the small position changes can be displayed on the map of the mobile phone in real time. Click on a station in the office area on the map, and the navigation immediately plans the shortest route. Following the instructions, the reporter accurately found the target.

"It can be seen that optical communication technology is a major invention in the field of lighting. It has led to the evolution of LED lighting from a single terminal commodity to a chain of industrial chains." Speaking of the value of optical communications, Fu Qiang said that this will drive indoor maps. The development of precision information services, new social form construction, real-life game entertainment, etc., can provide a series of supporting solutions for physical supermarkets, large indoor public spaces and so on.

Not long ago, the APP based on optical communication technology, which is easy to visit, was launched in six cities including Beijing, Shanghai, Guangzhou, Shenzhen, Wuhan and Changzhou, covering more than 300 offline retail stores. Through the APP, consumers can see the brand layout, discount distribution, and distribution of points in the mall at a glance; through indoor positioning, it is more convenient to find merchants, find friends, and find discounts. The mall can push merchant information to consumers, guide users to move through virtual points and red envelope games, and create an O2O closed-loop model for offline retail businesses. In the commercial field, the practical use of optical communication can be more extensive. For example, in the parking lot, library, hospital and other fields to achieve the functions of finding a car, finding a toilet, looking for a department, and other different location-based services can be developed based on different scenarios.

In addition, the application of optical communication in special fields is almost irreplaceable, such as high-risk and high-confidence places such as coal mines, military industry, prisons, nuclear power plants, etc., and the characteristics of anti-interference, stability and safety of optical positioning technology can be utilized for personnel positioning and management.

Experts said that the current outdoor GPS Beidou navigation and positioning technology is very mature. However, more than 80% of the time people are indoors, the demand for indoor positioning is exponentially increasing, and the accuracy requirements will be higher. With the gradual maturity of optical communication positioning technology and the widespread application of mobile Internet, the indoor positioning market is already in the early stage of the outbreak. It can be seen that the optical positioning technology of optical communication will be infinitely enlarged.

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What is optical communication positioning?

Optical communication technology is a communication method that uses light waves as a transmission medium. Light waves and radio waves are electromagnetic waves, but the frequency of light waves is higher than the frequency of radio waves, and the wavelength is shorter than the wavelength of radio waves. Therefore, it has the advantages of a transmission frequency bandwidth, a large communication capacity, and strong anti-electromagnetic interference capability.

The optical communication positioning uses the indoor ubiquitous visible light source as the transmitting carrier. When the user enters the lighting area of ​​the luminaire, the camera of the smart device can be used to receive and identify the optical signal, and the unique identification information sent by the luminaire can be analyzed. The device uses the acquired identification information to determine the corresponding location information in the map database, and completes the positioning.

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