China Petroleum Dagang Petrochemical Wireless Mesh Network Comprehensive Solution

Recently, CNPC has established a Production Safety Management System for refining and chemical enterprises through wireless mesh network technology. This laid the foundation for standardizing operations of refining and chemical enterprises. Adelia's wireless mesh network technology, as the wireless wi-fi bearer technology of the system, combined with PDA terminals, has successfully achieved data collection, data transmission, and other functions in the production process.

Requirement Description
The security management system will be arranged throughout the production work zone of China Petroleum Dagang Petrochemical Company. Users will use wireless PDAs to operate in the entire plant area, wireless Network products that provide data bearer must meet the following requirements:
1) Strong coverage
The plant area is relatively open, the production equipment is metal products and the structure is more complex, the shielding and shielding of wireless signals is large, requiring wireless devices to have a strong coverage capability.
2) High System Reliability
Wireless network equipment must have high stability to ensure normal production in the plant.
3) wireless networks provide seamless roaming for Wi-Fi devices
Handheld terminal devices need to move freely in the wireless network coverage area, and ensure that the terminal maintains communication with the server during the switchover between regions covered by different base stations, so that the service is not interrupted, that is, terminal devices can achieve cross-subnet roaming in wireless networks.
4) wireless networks provide wireless routing functions
Networks in different working areas of the plant will be divided into subnets based on different functions. Wireless Networks are required to have certain routing functions, so that PDA terminal devices can be freely expanded and increased, after the number of PDA terminals is increased, no network configuration is required.
5) wireless networks provide high security and encryption functions
The security of the entire system will affect the security of equipment in the whole production area. Therefore, wireless networks must have high security and encryption capabilities to avoid the entry of other illegal terminals and affect normal production.
Solution
1. Design Principles
This time, the wireless network coverage scheme of the refinery of China Petroleum Dagang Petrochemical Company was designed in line with the following principles: practical, advanced, stable, open, scalable, secure, highly available and economical.
2. solution design
The wireless coverage of China Petroleum Dagang Petrochemical Company is the most complex work area of Tianjin Petrochemical refinery, this area includes heavy oil catalytic cracking unit, gas desulfurization unit, and detan Unit, among which various units are mostly metal products, with strong signal shielding and shielding capabilities. When the operator operates in this area, the activity area includes not only the outdoor area, but also the indoor area.
Based on the future application scenarios of China Petroleum Corporation Dagang Petrochemical Company, this paper designs the Azalea wireless routing product for wireless coverage networks. MSR2000 devices are set in key areas as wired access points for wireless coverage, and are connected to the existing wired network in Dagang, Tianjin to provide wireless coverage for indoor and outdoor devices in the whole plant.

3. device Network Management
To facilitate the management of wireless network devices, Azalea specially designed the network management hardware system for the Mesh network management of the company to access the wired network through standard Ethernet interfaces, real-time and effective management of MSR wireless Mesh routers. The network administrator can access Azalea NMS through a browser or a dedicated client to manage the entire wireless network. Azalea NMS supports all Chinese operation interfaces. It has powerful management and maintenance functions. The specific functions are as follows:

Topology Discovery Device fault management Real-time performance monitoring Centralized Configuration

Implementation Effect

After the implementation of the project, the information manager of China Petroleum Dagang Petrochemical Company tested the system. The results show that this technology breaks the traditional wireless network structure and expands from point and line to plane: AP point) 'bridge line) 'mesh network surface ). It also has the following features: high bandwidth, which can achieve simultaneous transmission of massive data to ensure the speed and efficiency of data transmission; high coverage, which can meet the needs of enterprise users for long-distance and large-scale wireless coverage; in special network architecture, Azalea introduces IP Backbone Routing technology widely used in wired networks to the wireless mesh architecture. Because the L2 network architecture cannot effectively isolate broadcast packets, broadcast packets occupy a large amount of wireless link resources. The advanced three-layer network architecture is used for transmission, meeting the requirements of enterprise users who need stable video monitoring signal transmission.
"We are satisfied with the test results. "The information manager of China Petroleum Dagang Petrochemical Company said," This technology fully satisfies the needs of our security management system and achieves wireless coverage throughout the plant, this significantly improves production security and work efficiency. "