Research on DCS Network Architecture of Qingdao Metro Line 4

The features of network architecture of the DCS (Data Communication Subsystem) of Qingdao Metro Line 4 and Line 2 are analyzed and compared. The network architecture of Qingdao Metro Line 4 evolved from Qingdao Metro Line 2. In order to meet the safety requirements, the network architecture of Qingdao Metro Line 4 inherits the advantages of Qingdao Metro Line 2 and is further optimized, using A/B network design ideas and physical isolation of different types of services to enhance the redundancy and reliability of the entire network.