Proven WLANs for Rail Signaling and Infotainment Systems


Train-to-Ground Links


Controller-based Turbo Roaming Enables Highly Available
Layer 2/3 CBTC Networks

For CBTC networks, maintaining communication link availability is extremely important in order to guarantee operational safety and efficiency. In high speed environments, when a train moves away from the coverage of one AP and enters the domain of another AP, a handoff procedure occurs that may take up to several hundreds of milliseconds and cause long latency. To overcome slow handoffs on CBTC networks, Moxa provides controller-based Turbo Roaming technology that is enabled by the WAC wireless access controller. When roaming to the next available AP, the client can be pre-authenticated by the WAC, which reduces the need for re-authentication and keeps the switch-over time at the millisecond level.

Summary of Benefits

  • Seamless and secure train-to-ground connections
    • Layer 2/3 roaming enabled by WAC-1001/2004, respectively
    • Millisecond-level handoffs
    • Packet loss rate of under 0.1%
    • Flexibly adapts to various wayside antenna types:
      Open radio propagation, leaky cables, and waveguides
  • Network latency
    • Max. latency under 1 ms
  • Data throughput
    • 4 Mbps of throughput at link speeds of 6 Mbps
  • Non-interference
    • Three non-overlapping roaming channels
  • Railway Standard
    • Ruggedness: M12, fiber optic link, IP68 and -40 to 75°C
    • Certification:
      - Carborne: EN 50155*/
      50121-3-2 and IEC 61373
      - Trackside: EN 50121-1/

      *Compliant with essential section

Product Briefing

Industrial Wireless Access Controller
AWK-RTG Series
Dual-RF/Single-RF Solutions Indoor/Outdoor Solutions
  • Millisecond-level L2/3 controller-enabled Turbo Roaming

    • Enables layer 2 roaming with centralized security
    • Supports inter-controller roaming
    • IEEE 802.11i-compliant wireless security
    • Redundancy via hot standby controller

  • Universal roaming scheme:

    • Supports various wayside propagation modes
  • Fast and secure train-to-ground links

    • Supports controller-based Turbo Roaming
    • 4 Mbps throughput at link speeds of 6 Mbps
    • Millisecond-level handoffs
    • Packet loss rate of under 0.1%
    • Maximum network latency < 1 ms
    • Adaptable to various wayside antenna types

  • Certifications:

    • Onboard: EN 50155*/50121-3-2 and IEC 61373

      *Compliant with essential sections

    • Trackside: EN50121-1/50121-4






Carriage-to-Carriage Links


ACC (Auto Carriage Connection) Technology Automatically Creates Flexible Inter-Carriage Wireless Links

ACC (Auto Carriage Connection) makes inter-carriage network links easier than ever before to set up and maintain. Train consists frequently change during daily service. In response, Moxa provides ACC (Auto Carriage Connection) technology that is designed specifically to enable flexible carriage-to-carriage connections. ACC works by automating the previously manual process of creating new wireless bridges that provide broadband communications throughout the entire train, while still maintaing robust network security. ACC is also available in the 802.11n AWK-RCC series, which can handle any bandwidth-heavy media streaming application. With ACC, rail operators can reduce manual work and the associated errors, all without modifying their systems.

Summary of Benefits

  • Automatic inter-carriage links
    • Connect and disconnect inter-carriage APs automatically
    • Minimize manual workload and errors
  • Link stability
    • Detects link timeouts to ensure link stability
  • A perfect match
    • Customize ACC to fit unique vehicle types
  • 802.11n networks
    • Supports bandwidth-heavy multimedia services

Product Briefing

AWK-RCC Series
Dual-RF/Single-RF Solutions
  • Standards: 802.11a/b/g/n

  • Supports up to 300 Mbps bandwidth

  • ACC (Auto Carriage Connection)

  • Security: WPA/WPA2/802.11i

  • Railway hardened:

    • Ruggedness: M12, -40 to 75˚C
    • Certifications:
      - Onboard: EN 50155*/50121-3-2 and IEC 61373
      - Trackside: EN 50121-1/50121-4
      *Compliant with essential sections