Innovation in Key Technologies of 5G-R System

Abstract: This paper analyzes the communication business needs and application characteristics based on China's railway operation scenarios. Focusing on the specific needs of railways, the 5G-Railway (5G-R) system adds railway-specific functional network elements on the basis of general architecture. In terms of system networking, it focuses on the innovative key technologies of 5G-R core network and wireless network networking to adapt to the railway management mechanism and reliability requirements. It analyzes the technical optimization and innovation of 5G-R railway common equipment in terms of redundancy mode, function sinking, fault detection and reversal mechanism, etc.; 5G-R wireless network adopts the same-site equipment redundancy mode, and the paper analyzes the technological innovation of RRU redundancy, BBU redundancy and PCI planning, etc.; it also highlights the benefits of the train-ground integrated transmission system, including reduced roof antennas, decoupling of services and communication, unified spatial and temporal benchmarks, and cost savings.