Grading Protection Access Scheme and Implementation of Rail Transit LTE System.

This paper studies the specific schemes and steps of adding three grades of protection to LTE system carrying signal services based on Xi'an Metro Line 14. Two feasible access schemes of grading protection are proposed according to the characteristics of Line 14, and the optimal grading protection access scheme is selected through network architecture and performance evaluation and comparison to ensure the security and stability of network transmission. At the same time, through the description of the relevant interface configuration and precautions of the grading protection system, the important steps in the process of adding grading protection to LTE system involving the safety of train operation are elaborated to ensure network security, provide important guarantee for traffic control of rail transit signaling system, and provide reference value for subsequent rail transit grading protection access. [ABSTRACT FROM AUTHOR]