Copyright:Shanghai MRDcom Co.,Ltd.

Rail Transit-ISCS

2019/05/31 16:51
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Typical Case-Rail Transit——ISCS

MRD子午线®—Rail Transit System Solution

MRD子午线®—Rail Transit ISCS Features

1.Rail Transit (ISCS) Terminal device and server access to 2 independent ring network through double network interfaces.

2.Each backbone network (network A or network B) require that redundant switching time should be no more than 50ms.

3.Dual backbone network (network A or network B) both adopt industrial switch construct with high MTBF and high LifeTime.

4.Subsystem of ISCS access to two backbone network through the front-end din-rail industrial switches.


Networking Solution Status Quo: single-ring dual-node and dual-ring dual-node

Typical Networking 1—Wuhan Line 2 ISCS

Typical Networking 2—Hefei Line 1 ISCS

Typical Networking 3—Fuzhou Line 1 ISCS

Typical Networking 4—Shanghai Line 10 ISCS


ISCS Overall Solution

Modular Level-3 Safety Protection Module

Security Risk of Network Structure

Complex network structure, many system interface, lack of effective regional segregation.

ISCS has many subsystem interfaces, but without effective safety protection measure.

Lack of Intrusion detection and security self-check mechanism; can not find the risk of network in time and do the security self-check of the network.

The subsystem lack of the access, deny or reorientation to data flow, and lack of audit and control of network services and access.

Security Risk of System Bug

The operating system of terminal device have lots of system bug and cannot be repaired in time.

Subsystem controller mostly adopt foreign equipments which have many serious bug ,even the backdoor.

Security Risk of Network Protocol

Common used TCP/IP protocol has congenital security flaw.

Industrial control protocols are lacking of security feature and function such as authentication, authorization and encryption which needs additional overhead.

Security Risk of Common Measure

Traditional IT firewall lack the knowledge of industrial control system, and can not meet the requirements of the control system like ISCS which needs higher security level.

Cannot update the virus library of anti-virus software timely which is installed in the workstation and the server, and often affects the stability of the system.

Modular Level-3 Safety Protection Module—Information Safety

Integrated Supervisory Control System takes the station as a unit to isolation and protection. And divide the safe area, configure a reasonable security system, analysis and protection, keep the station safe, and combine with the whole network security, isolation and in-depth protection.

Firewall of Stateful Packet Inspection Technology

Supporting IP and MAC address filtering

Providing simple deployment and high protection

Layer-2 network bridge without IP address

having no effect on the existing network

very safe and reliable

Protocol-level depth content check

ModBus/TCP、OPC and Ethernet/IP

simple deployment(modular board), configuration and management

Next Generation Industrial redundant Network

1. IEC organization has already issued IEC62439-3-5 and regulated High-availability Seamless Redundancy(HSR) in 2012.

2. HSR protocol is a public and standard redundant protocol.

3. HSR protocol is a double-emission and optional-receiving mechanism to realize zero-packet-loss, zero switching time high redundant industrial ring network.


4. HSR(IEC62439-3-5) protocol and PRP(IEC62439-3-4) protocol can be adopted at the same time, and can realize the switching of network A and network B in hardware layer.

PRP-Parallel Redundancy Protocol

DANP is the node supporting PRP protocol, and separately connect network A and Network B.

DANP have same IP and MAC address in Network A and Network B, and send the same packet to Network A and Network B at the same time.

HSR-High Reliability Seamless Redundant Backbone Network

HSR+PRP Single IP 0ms Redundant Network

MRD子午线®—Modular Core Industrial Switch

TNM6000 Modular Core Industrial Switch


1.High backplane bandwidth——for high flow subsystem

2.Multi-functional service module——there-grade secure +HSR/PRP

3.Equipped with 8 10G ports and 80 1000M ports at most——easy to do with high-density access

4.4 hot plug service slots——meet the on-demand configuration and flexible expansion

MRD子午线®—Modular Industrial Switch

TNM4000 Module Industrial Switch


1.High Backplane bandwidth for high flow subsystem

2.Fanless, IP40 protection Grade high reliable and uninterrupted running.

3.Equipped with 8 10G ports and 64 1000M ports at most, easy to do with high-density access.

4.7 hot plug service slots, to meet the on-demand configuration and flexible expansion.


Distributed Optical Fiber Sensor System—DTS

AP Sensing is established in 2007 located in Herrenberger str.130 D-71034 Boeblingen. Inherit the core technology and innovation of HP and Agilent Technologies. AP Sensing have many regional offices around the world, and it is a high-tech company focused on the development, sales, marketing, service and training of distributed fiber optic temperature measurement and distributed acoustic sensing product.

The product and technology of APSensing-MRD take the leading position in the industry. It has more than 20 years of experience in OTDR, several leading inventions and industry-leading quality standards. The core of APSensing-MRD  DTS solution is based on the core technology, optical packaging technology and IP technology inherited from Agilent Technology. Agilent Technologies is a global leader in optical measurement testing.

Related certification of APSensing-MRD:

APSensing-MRD have the most comprehensive DTS product line in the industry: Linear Heat series(LHD), Linear Power series(LPD) and Linear Pro series(PRO).

Linear Heat series(LHD) is specially designed for fire detection in the harsh environmental. And have already passed fire certification in global such as EN54-22/UL521/ULC-S530/FM/KFI. There are more than 2,000 devices which have installed on a global scale.

Maximum measuring distance can be up to 50km.

Wide temperature measuring range: -250℃~+750℃.

Continuous temperature measurement of the whole sensing cable without dead ends.

Raman scattering and optical time domain reflection (OTDR) technique.

Open SCPI programming instruction

Temperature profile

Loss curve of fiber

Average temperature of the partition

Maximum temperature of the partition

Support Modbus protocol.

Distributed Optical Fiber Sensor System—Fire Protection in Tunnels

Fast and reliable fire alarm and monitor the size and direction of development;

Open interface (LAN/Modbus), easy to integrate;

The slow redundant settings still can realize the complete monitoring after cable parted.

Using the sensing fiber which passed IEC600331-25 certification;

With the industry's most complete fire certification.

Distributed Optical Fiber Sensor System—Battery Monitoring

Battery Monitoring

Charge and discharge datum data modeling;

Abnormal charge, discharge monitoring;

Accurately decide the status of each module;

Periodic charge anomaly monitoring;

Storage battery disaster prevention monitoring;

Distributed Optical Fiber Sensor System

Distributed temperature monitoring;

Asset visualization;

Alarm management;

Central database;

Analysis and reporting functions;

Historical data query;



Device on Distributed Optical Fiber Sensor System

N4000 Series Linear Optical Fiber Sensing Monitoring Device


Measuring Distance 2/4/8/20/30/40/50km

Minimum Sampling Interval <4km, 0.15m; >4km,0.25m

Standard Deviation ±0.60C

Measuring Mode Single-ended or Double-ended measurement mode (fiber optic cable redundancy)

MRD子午线®——Product Stability:

1.MTBF—Mean time between failures

Based on SR-332 Algorithm

2.Lifetime—Average Lifetime

Based on the lowest operating parameters @ Operating Temperature Algorithm

3.Design—Details and experience of product design

The difference between air sucking and air blowing of the fan;

The difference between Conductive Oxidation and Spray Lacquer;

The difference between Immersion Gold and Tinplating;

The difference between single-port and multi-port of Network Transformer;

The difference between the lowest bottleneck of capacity and lifetime of electrolytic capacitor;

The difference between insulate and non-isolated power supply;

The difference of Software periodic memory check;