Shenzhen Metro Line 14 On-board PIS and Anti-collision System

On-board PIS and Anti-collision Solution for Shenzhen Metro Line 14

Shenzhen Metro Line 14 was on trial operation in October 2022. This line is 50.34 kilometers long, connecting Futian, Luohu, Longgang and Pingshan districts, with 18 stations, it’s the fourth longest metro system in the world, and it will relieve the traffic pressure of eastern Shenzhen.

The train for Shenzhen Metro Line 14 has the maximum operating speed of 120km/h. It’s an autonomous driving project designed according to the highest international level GOA4, and the 5 categories of detection systems can monitor the vehicle status real time, ensuring safety during autonomous driving.

3onedata provides on-board PIS and anti-collision solution for Shenzhen Metro Line 14. The PIS system includes train announcement, on-board display, carriage monitoring, emergency call, etc. 3onedata’s EN 50155 Ethernet switches in this system help achieve low latency, high bandwidth, zero packet loss and low interference for the network. The anti-collision system can automatically recognize obstacles while the train is in motion, providing security protection for passengers.

Overview

Challenge

1. Integration of various business data brings serious challenges to classified treatment of unicast traffic and multicast traffic
2. Fluent transmission of audio and video requires high bandwidth
3. Risk of looped network storm between switches
4. As it is an autonomous driving metro, ensuring a safe distance from the vehicle in front is very important

Solution

1. Dynamic routing protocol and multicast routing protocol make data transmission easier
2. Gigabit converged backbone network ensures high bandwidth for reliable data transmission
3. Adopts link Aggregation protection to avoid broadcast storm, NAT guarantees T2G communication security
4. Uses AI to ensure the safety running of the metros

Result

1. Multicast technique realizes efficient and reliable data transmission
2. Achieves fluent transmission of audio and video data

3. Ensures stable on-board network and reliable PIS system
4. Anti-collision system ensures safety during autonomous driving

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On-board PIS and Anti-collision Solution for Shenzhen Metro Line 14

Overview

Challenge

Solution

Result