Network monitoring upgrades into key points for highway security monitoring

In the "Twelfth Five-Year Development Plan for Transportation" (Draft), the reason why the importance of "security" is highlighted is: "The traffic volume in the 12th Five-Year Plan period will further increase, the scale of transportation will continue to expand, and With the increase in the number of employees, the security risk of transportation has greatly increased. Global warming and extremely bad weather have been increasing. As a result, serious natural disasters, as well as unexpected incidents such as terrorist attacks and major outbreaks, have been increasing.” As far as the expressway is concerned, the gradual improvement and sensitivity of the road network have also become the highlights of the security issue.

Highway monitoring system is composed of subsystems such as information acquisition, data transmission, central control and information release, and has two functions of detection and control. The features of the freeway monitoring system are as follows: 1 The monitoring system has large geographic coverage, decentralized monitoring equipment, and high requirements for environmental adaptability; 2 There are many types of transmission media, such as voice, images, and data, which require high communication bandwidth and real-time performance; 3 The variety of field equipment is complex, the principle is not the same, the interface is diverse, the speed is different, and maintenance and management are difficult. 4 It involves a wide range of technologies, including computer networks, video monitoring, data acquisition and processing, communications, multimedia image processing, and computer software design.

As one of the important components of intelligent transportation facilities, security equipment has been widely applied to expressways. Coupled with the national emphasis on the safety of the transportation industry, it can be said that the transportation industry has brought a lot of security products and solutions. Business. Of course, the most important thing is the improvement of the application of security facilities. It is also a good thing for the country and the people. However, in the security applications of expressways, there have been a lot of problems and security facilities have become very helpless.

Independent control of the road section still exists Due to the restrictions of the original communication network and technology, there are still a large number of high-speed road sections (charging systems, monitoring systems, communication systems, etc.) coexisting and independent of each other. This type of equipment investment and operating costs are relatively high. If traditional integrated networking is used to implement integrated monitoring of the entire road section, multiple systems and networks must be built to achieve video, audio, and data transmission and monitoring. This makes the maintenance of the entire system difficult, and the real-time linkage is poor. , Low stability, often appear out of sync with images and sound. In addition, its biggest flaw is that it cannot implement network monitoring. Each road section can only achieve local internal monitoring, and it cannot achieve the supervision of the control points at all levels by the headquarters and even higher management organizations. With the gradual improvement of the digital broadband network, this kind of decentralized system will be replaced by a highly integrated integrated network equipment, and will be applied to a wider range of fields.

Inadequate networking becomes the core issue. Network monitoring is an inevitable outcome of the development of the highway to the present stage. Most provinces have already started the networking of intra-provincial monitoring systems, and the network of larger-scale monitoring systems is currently underway. However, current network monitoring also faces many difficulties, such as a series of technologies such as too narrow bandwidth of video information, limited storage capacity, poor processing and use of information resources, difficulty in codec compatibility and upgrade, and difficulty in interconnection of different systems. problem.

At the same time, the long-standing regional division management model has become increasingly contradictory with the road network operation. Under the influence of factors such as the diversification of investment subjects and localization of administration, network monitoring is not only a problem of coordination between different departments in the same region, but also faces problems such as the diversification of operational management models and multi-sector coordination across administrative regions. This is also an important institutional bottleneck for network monitoring.

Therefore, the networking monitoring in many places seems to be far from the goal in planning and designing. In many cases, this networking can only be a physical network. In such a networked monitoring environment, it becomes more and more confused.

The author believes that the core of the above two major reasons is still the network can not keep up. If the highway construction remote network video surveillance system will be able to meet these problems well. The remote network video surveillance system changes the information flow (including video, audio, and control, etc.) of the system from the analog state to the digital state, fundamentally changing the process of information acquisition, data processing, transmission and dump, and system control of the video surveillance system. Way and structure form. It adopts a digital video image surveillance system based on the network as the transmission medium, TCP/IP protocol, and computer technology as the core. Its characteristic is that the on-site camera's analog video signal and control signal are converted to digital signal transmission, reception, control, storage and display on the spot. It is an "all-digital, networked" system and is managed and controlled on a unified management platform. To achieve a networked, multi-level management model.

Poor networking can be said to be one of the obstacles to the comprehensive monitoring of expressways, and it is also a problem that manufacturers and countries need to solve urgently. Only the networking problem can not be solved overnight. It is believed that through the efforts of multiple parties, monitoring and comprehensive networking is no longer a difficult task.