This standard is drafted in accordance with GBlT 1. 1-2009.This standard is proposed by and managed by the Economic Planning Institute of the Ministry of Railways.This standard is drafted by Railway Engineering Research Institute of China Academy of Railway Sciences, and China Railway Signal & Communication Group Corporation.This standard is mainly drafted by Wang Shuguo, Xiao Junheng, Guo Fu'an, Wang Meng, Fang Hangwei, Fan Jia, Zhang Yulin and Sun Xiaoyong.