MOBIfiber™ High-Reliability
Train-to-Ground Connectivity
HELIOS® MOBIfiber™ High-reliability Train-to-ground communications solution ensures continuous high-speed wireless connectivity between trains or metros and network control centers.
HELIOS® advanced MOBIfiber™ solution based on Private LTE, LTE-V2X and LTE-U technology is deployed in railway and metro systems, powering applications such as Wi-Fi for passengers, real-time high-definition CCTV, PIS, signaling, CBTC, PIDS, PAS, sensors, alerts and more.
Operating in Challenging outdoor conditions and in underground tunnels, MOBIfiber™ complies with Railway industry standards and delivers unmatched high-reliability, low latency, large capacity, high-speed mobility and precise positioning features for train operator or vendors.
Featuring high-reliability, low latency, high-capacity
high-speed mobility and precise positioning
System Architecture
MOBIfiber™ is composed of three elements: the Trackside RSU (RoadSide Unit), the Vehicular OBU (OnBoard Unit) and a Suite of Management & Monitoring tools.
MOBIfiber™ Highlights
- Incorporating advanced OFDMA & 27 MCS levels based upon Private LTE, LTE-V2X and LTE-U technologies the MOBIfiber™ enables operating in near and non line-of-sight (nLOS/NLOS) conditions and in environments where there is high interference.
- Extended coverage per RSU, reducing the number of track-side installation required and saving upon substantial infrastructure cost (e.g. poles, electricity, network) as well as on-going maintenance, which are reduced by a typical ratio of 1:5 to 1:15 when compared with other Wi-Fi/Mesh Wi-Fi based solutions.
- Embedded GPS, GLONASS or Beidou (Option) module in vehicular OBU enables precise positioning.
- High reliability and high capacity – 150Mbps (One carrier 20MHz) per train.
- Support train speeds of up to 360 kmh / 224 mph.
- Seamless handover between radio base stations with a handover time of < 30msec.
- Full synchronized network that operates on a common time base for all radio base stations, eliminating potential mutual radio reference. This capability is essential for maintaining high and consistent throughput along all routes and operational scenarios.
- Low and fixed latency and jitter critical for delay of sensitive applications such as video and VoIP.
- Over-the-air QoS enabling service transmission prioritization with assured SLA.
Key Features
- Fully SDR (Software Defifine Radio) architecture enables customized frequencies from 230MHz to 6GHz.
- Flexible channel bandwidth as 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz for self-adaptive or manual tune by software.
- High-capacity up to 150Mbps @ 20MHz BW*1Carrier, and upgradable to up to 600Mbps by carrier aggregation (CA) framework @ 4*20MHz (when allowed by Regulatioj.
- Advanced OFDMA & 27 MCS level base on Private LTE, LTE-V2X and LTE-U technologies enables excellent performance on averaging interference and bandwidth utilization in a high interference environment and near/non line-of-sight (nLoS/NLoS) scenarios, and offer unequaled reliable wireless link between trackside RSU and vehicular OBU on move compared with Wi-Fi/Mesh Wi-Fi based solution.
- Support various unlicensed band as 2.4/3.5/5.8GHz.
- Configurable uplink/downlink bandwidth ratio enabling a variety of services over the same infrastructure.
- TDD radio synchronization enables dense deployments with maximum performance, using built-in GPS/GLONASS/Beidou (Option) chips to prevents mutual interference and increase network capacity and range.
- Advance encryption by proprietary air interface base on LTE air interface and AES128 & 256 encryption, also support Layer 2 encryption & security.
- Compact & robust design enable simple and easy installation and operation in harsh outdoor environments and compliant with the IP67 standard.
- Complies with railways standards including EN50155, EN61373, EN5012 and IEC 60571.
MOBIfiber™ Active Redundancy Architecture
Train Control System, such as ATC (Automatic Train Control), IXL (Interlocking), CBTC (Communication-based Train Control) and CTC(Centralized Traffic Control), are a Critical Systems. Adopting a hardware redundant architecture is a vital requirement to detect faults in the train control systems.
HELIOS® MOBIfiber™ adopts active redundancy architectures both on hardware and air link. Two Trackside RSUs along the train route. Each RSU will be cover one side of the train route with a high gain directional panel MIMO antenna; Two Vehicular OBUs are deployed on both ends of the train. Each OBU will be configured on a different carrier (Channel), so it will set up two active wireless links for redundancy. MOBIfiber™ will automatically select the backup wireless link upon fault or bad signal quality on main wireless link.
