AFC-Automatic Fare Collection System high protection, reliability, and redundant

BDCOM Rail Transit System Solution

Characteristics of AFC:

1.AFC network equipment for rail transit requires fanless design, high protection, reliability, and redundant power supply to ensure the normal operation of ticketing services.
2.Each access network requires a redundant switchover time of no more than 50 milliseconds.
3.Industrial switches with high MTBF and lifetime are used to construct the local access ring network.
4.AFC system connects to the transmission (SDH) network through the aggregation nodes at each station.

AFC (Automatic Fare Collection) System for Rail Transit

AFC (Automatic Fare Collection) System for Rail Transit

AFC Typical Networking Topology

Next-generation Industrial Redundant Network

1. IEC organization defined and standardized the High-availability Seamless Redundancy (HSR) network through IEC62439-3-5 in 2012.

2. HSR protocol is an open and standardized redundancy protocol.

3. HSR protocol achieves high-redundancy industrial networks with zero packet loss and zero switchover through dual-talker, multiple-listener mechanisms.

4. The simultaneous use of HSR (IEC62439-3-5) and PRP (IEC62439-3-4) protocols allows the switching between Network A and Network B to be implemented at the hardware level.

PRP-Parallel Redundancy Protocol

DANP, which supports the PRP protocol, is connected to network A and network B respectively.

DANP has the same IP and MAC addresses in both Network A and Network B, and it sends identical packets to both networks.

HSR-High-reliability Seamless Redundant 

HSR+PRP Single-IP Zero-Millisecond Redundant Network

HSR Zero-Millisecond Redundant Network