Application of 5G in Video Surveillance of Forestry Fire Prevention

Forest fires are a type of global forestry disaster that is sudden, strong, destructive and difficult to handle. It is one of the most serious natural disasters that destroy the ecological environment, endanger the safety of the people’s property, and destroy harmony and stability. Once a fire has occurred, it must be saved very quickly. Whether the suppression is timely or not and whether the decision is appropriate depends critically on whether the discovery of the forest fire behavior is timely, whether the analysis is accurate and whether the measures taken are appropriate. This is the key to extinguishing the fire. Therefore, how to realize the management of forest resources, supervise the plant and animal resources in the forest area, and how to prevent and warn the forest plant diseases and insect pests in the forest area before the fire detection and warning, during the fire process command and dispatch, and after the fire assessment Waiting for work is particularly important and urgent. With the rapid development of science and technology, the application of the Internet in various fields cannot be replaced. Therefore, with the rapid development of video compression processing technologies and network communication technologies, digitalized remote video transmission applications have been widely used.

In recent years, the comprehensive monitoring and control system for forestry fire prevention has been continuously progressed with remarkable results. Through modern scientific and technological means and innovative management methods, 24-hour uninterrupted supervision of fire conditions and forestry plant resources in key forest areas has been achieved. Therefore, the widespread application of digital large-scale networked video surveillance systems is a major trend, which will surely promote the widespread application of departments at all levels. Thanks to this, a large-scale video surveillance integrated management system compatible with wired and wireless networks emerges. Through this system, the center's monitoring personnel can directly monitor each key forest area in real time, which not only can intuitively monitor and record the real-time video conditions in the field. It can also install various alarm auxiliary devices at the front end, which can effectively prevent the spread of fire, achieve timely warning and command fire-fighting work, and also provide first-hand video data for the protection of forest plant resources for the subsequent event processing. To ensure reliable protection. As the forest fire prevention video surveillance system continues to advance, how to increase the transmission rate while adapting to more data traffic transmission, and how to realize the end-to-end delay reduction, so that the back-end management personnel of the monitoring system can respond more quickly is to promote The key to the further development of forestry fire prevention work lies. I believe that the emergence of 5G technology can bring new hope.

At present, the design of the transmission system for video surveillance is mainly in the following two ways:

1. Lay the cables.

2. Use microwave or 3G, 4G transmission, use wireless bridge or 3G, 4G video server, and transmit the video, audio, and control data returned by the front-end equipment to the forest fire prevention early warning and monitoring center.

The video and control signals from the front-end monitoring point to the monitoring center establish a wireless link through a wireless bridge. The wireless network adopts a point-to-point network transmission mode. The bridge and the antenna adopt a separate design. After the radio frequency interface is connected to the high-frequency arrester, it passes through The frequency feeder is connected to a directional antenna and uses a high-performance, high-bandwidth, multi-functional, outdoor-type carrier-class wireless device. This method effectively improves the long-distance link bandwidth of low-power terminal devices, and can achieve a wide range of wireless coverage, thereby achieving high speed, The purpose of real-time monitoring and early warning.

In view of the above two transmission methods, the cost of laying cables is high. At present, high-definition video transmission is mainly based on 720P, while 3G and 4G networks cannot meet the higher transmission requirements such as 1080P video, and the frequency band is narrow and cannot meet the transmission capacity. The need for growth and wider spectrum resources. If the 5G network is applied to the security video surveillance system, this series of problems will be perfectly solved.

Up to now, the overall vision and performance requirements of the future 5G networks have basically reached a consensus, mainly including: higher data traffic and user experience rates, massive terminal connections, and lower latency. It is expected that by 2020, new types of new services and applications such as the mobile Internet and the Internet of Things will continue to emerge, bringing about 1,000 times more data traffic and more than 50 billion terminal devices. At the same time, business applications such as virtual reality bring about strict end-to-end delay requirements. For example, when the current device transmits the collected video to the background, a delay of more than 1ms may cause a delay in the fire protection response. Compared to the traditional wireless system, the latency requirement for the 5G network in milliseconds increases by nearly two. Orders of magnitude. Increasing the data traffic density by hundreds or thousands of times, improving the user experience rate by tens or even hundreds of times, and shortening the end-to-end delay several times is the best gift for security video surveillance in 5G networks.