Moxa rail computing empowers smarter railways

News04 Nov 2015

Moxa rail solutions portfolio

To overcome the unique challenges facing the rail industry mentioned above, Moxa have developed unique time and cost saving railway technologies, including intelligent wireless inter carriage connections, flexible and location based auto device configuration, millisecond level Ethernet redundancy and millisecond speed WLAN roaming solutions. Moxa’s broad solution portfolio has been deployed all over the world in major POS (Passenger Oriented Service), passenger WiFi, CCTV, CBTC (Communication based Train Control), ATO (Automatic Train Operation), wayside DCS and other railway systems.

Smart Rail:

  • Ethernet based train communication networks
  • Communication based train control
  • Advanced security monitoring system
  • Passenger orientated service system
  • High quality mobile internet connection
  • Open communication standard- compatible with different train builders

Market Drivers:

  • How to incorporate advanced technologies
  • Greater demands for passenger comfort
  • Security and crime prevention

Industry Challenges:

  • Aging railway systems
  • Interoperability of existing and new systems
  • Extreme climate conditions

IEC 61375-2-5 Ethernet train backbone

IEC 61375-2-5 is the new industry standard for defining Ethernet Train Backbone (ETB) requirements for open train data communication systems based on Ethernet technology. The standard ensures compatibility between local consist subnets, regardless of the consist network technology and manufacturer. The IEC 61375-2-5 standard gives railway vehicle manufacturers and operators access to the latest communication techniques, including wide data bandwidth, high speed data communication, standardised device interfaces and easy integration of cameras, displays, WLANs and other devices.

Moxa’s industry leading TN-5916 series of Ethernet routers are designed according to the specifications laid out in the IEC 61375-2-5 standard. The TN-5916 series routes traffic between Ethernet Train Backbones and Ethernet Consist Networks. In addition, the TN-5916 router handles the train inauguration as cars of the train are connected together or disconnected, and provides this information to relevant applications.

Intelligent Ethernet redundancy adjusts automatically to consist rearrangements

Railway operators are looking for ways to more efficiently allocate resources and server passenger demands. For example, metropolitan rail services may want to run trains with fewer consists during off peak hours but longer trains with more consists during rush hour. Railway operators can also serve multiple markets and conserve track assets by connecting multiple consists with different destinations into one train if they will travel along the same route for at least part of the journey.

Moxa’s ToughNet Ethernet switches feature DRC (Dynamic Ring Coupling), and intelligent Ethernet ring redundancy technology that excels at inter-consist networks. By detecting and automatically reconfiguring the network, DRC reduces configuration time and potential human error, ensuring that the system provides highly reliable and efficient operation, day in and day out, and no interference with intra consist networks for seamless delivery of on-board passenger services.

Zero interference in passenger service

Unlike RSTP, Dynamic Ring Coupling does not disrupt intra consist networks during reorientation. As a result, all the Ethernet network services today’s long distance railway passengers and operators have come to expect- CCTV, surveillance, WiFi access, passenger information systems, public announcement systems, and more, can be seamlessly enjoyed even when coupling switches are rearranged mid journey.

Inter Carriage- Intelligent industry tailored solutions

Thanks to ACC (Auto Carriage Connection), operators can enjoy the operational cost benefits of using wireless inter carriage links, without introducing new maintenance tasks and security vulnerabilities. With ACC each device needs to be configured just once to be ready to deploy on any carriage and form links in any train configuration.

Operators no longer need to manually change their AP configuration each time they recompose the train carriages. ACC technology will intelligently and dynamically form bridge links with error free precision to provide broadband communication throughout the entire train, and still maintain high network security thanks to WPA/WPA2 encryption. ACC also supports high throughput applications because it is available in 802.11n for the AWK-3131-RCC/5232-RCC series.

Connect and disconnect inter carriage APs automatically

Designed specifically for railway operating conditions, Moxa’s proprietary ACC can adapt to any change in train compositions. Unlike WDS, ACC forms new wireless bridges automatically, not manually, while also maintaining high network security with WPA and WPA2. Each AP only needs to be configured once and consequently operators no longer need to manually reset their AP device each time they recompose the carriages. In addition, a timeout period is in place to confirm that the two carriages are in fact engaged and linked, thus avoiding unwanted associations. ACC greatly minimises onsite labour and human error.

AWK-RCC EN 50155 Wireless AP

  • IEEE 802.11a/b/g/n compliant
  • Dual radio design. 2.4GHz and/or 5GHz RF bands
  • Redundant power inputs and PoE+
  • Up to 300 Mbps data rate
  • M12 anti vibration connectors

Train to ground- Intelligent wireless link status analysis

In order to deploy an effective wireless train to ground (T2G) connection, the system must be able to accurately evaluate the strength of the wireless communications links from moment to moment. The most common solution to evaluating the communications link is to simply measure the signal strength of a given wireless link.

Indeed, signal strength will usually correspond with communications reliability, but there are exceptions. For example, when in tunnels, extremely high signal strength might actually be a symptom of signal oversaturation, when the client and access points are very close together. In these conditions, the actual communication between client and access point will be very erratic, despite the apparently strong signal strength.

For this reason, Moxa recommends the use of systems that can measure overall link status from a broader perspective, not just signal strength. While signal strength is an important and helpful metric for estimating a wireless connection, it should not be the only measure.

KHz level precise data acquisition

The ability of railway operators and maintenance engineers to prevent costly system failures and optimise resource allocation depends on a myriad of real time wayside asset condition information provided by separate monitoring systems. These data acquisition systems often compromise many sensors, transducers and remote terminal units running on different platforms and closed communication protocols, which can make maintenance more challenging and costly.

Moxa EN 50121-4 RTU controllers offer kHz level analog input sampling rates, giving engineers the analog data accuracy they need to correctly analyse events with precise millisecond level timestamps for event sequencing.

ioPAC 8500 RTU Controller

  • Automatic topology discovery and visualisation with VLAN/IGMP grouping.
  • Event playback for reviewable diagnostics
  • Third party devices supported with MIB complier and MIB browser
  • OPC tags to integrate with SCADA/HMI applications
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