Communication Network Optimization and Signal Enhancement Technology in High-Speed Rail Scenarios

The high-speed rail communication network has significant characteristics such as high mobility, large signal penetration loss, and sudden traffic volume, and it faces challenges such as the Doppler effect, frequent switching, complex interference, and network capacity bottlenecks. This paper mainly focuses on the communication network in the high-speed rail scenario, comprehensively expounds its characteristics, challenges, optimization and signal enhancement technologies, and conducts an analysis in combination with cases from multiple regions. Through means such as scientific site selection, reasonable layout, algorithm improvement, interference suppression and signal enhancement, many projects have achieved remarkable results. For example, after the optimization of a 500-kilometer high-speed railway line, the signal coverage rate in mountainous areas has been significantly increased, the switching success rate has been significantly improved, and the data rate and traffic processing capacity have been enhanced. The optimization of the Changzhou section of the Beijing-Shanghai High-Speed Railway by China Telecom Changzhou Branch has increased the success rate of parallel section switching, enhanced the network speed and reduced the complaint rate. In the future, high-speed rail communication will develop in the direction of multi-technology integration, intelligent management, green and low-carbon development, and standardized cross-industry collaboration.