Method of Response Signal Processing in Traction Power Networks

A method of response signal processing applied in traction power network, comprising:

• establishing an data transmission channel between a target and a backend terminal through a relay router in a power distribution room;
• the target delivering a temperature-humidity information of the power distribution room to the backend terminal through the data transmission channel, and a response signal being delivered to the relay router after the backend terminal has received the temperature-humidity information;
• the relay router determining a second signal to noise ratio (SNR) according to a first SNR of the data transmission channel responded from the target when a noise ratio (NR) adjusting requirement is satisfied;
• the relay router determining a first identification of encryption algorithm based on the second SNR, and transmitting the first identification of encryption algorithm to the target;
• and
• the relay router transmitting an encrypted response signal to the target, which is encrypted based on the encryption algorithm according to the first identification of encryption algorithm, and the target decrypting the response signal by a corresponded decryption algorithm according to the first identification of encryption algorithm.