Research on 5G key technologies in intelligent coal mining

The application of 5G communication technology to the intelligent mining of coal mines has become the consensus of all walks of life. In order to provide more effective wireless communication and information processing support for the intelligent mining application of coal mines, the research and network construction status of 5G technology in theintelligentization of coal mines were investigated, and the progress of research and pilot construction in multiple aspects including theoretical research, standardization, and laboratory application of 5G technology in coal mines were analyzed. In view of both the wireless communication environment and service requirements, the coal mine 5G network planning scheme from the aspects of wireless frequency band selection, wireless base station selection, wireless networking and core network construction were studied, and it was pointed out some network planning principles such as “unified planning, safe economy, universal coverage and fine design” . Then, the possible new scenarios of 5G in coal mines were summarized, and it was proposed that 5G network slicing should coordinate the service matching granularity and further be refined based on the three basic scenarios of enhanced mobile broadband(eMBB), ultra reliable low latency communication(URLLC) and massive Machine Type Communication(mMTC), in order to achieve optimum use network resources, which further refined the application scenarios of coal mines, and at the same time, coordinated the relationship between business matching granularity, slice management and network resources to achieve the best network resource utilization; it also studied coal mine 5G edge computing technology, designed a cloud-edge-end collaborative edge computing architecture for specific coal mine intelligent business needs, and conducted research on key technologies such as computing offloading and edge-cloud collaboration. The above analysis and research show that when commercial 5G is applied to the intelligent mining process of coal mines, network planning and network slicing are still required for specific application services and scenarios. Because 5G technology itself is constantly being updated and developed, it is necessary to continuously integrate new technologies in the process of integrating 5G and coal mine intelligence, and carefully evaluate the key technologies adopted and network design and construction plans in the context of new technologies.