Train & Subway

In-car radio Coverage

Nowadays, setting up a highly-available wireless network in a train is an absolute requirement for operations but also for passengers*. In this perspective, ACKSYS offers WiFi devices allowing seamless in-car coverage through an easy deployment.

The complete solution enable the management of multiple networks (physically separated) dedicated to passenger WiFi, train announcements, PIS, CCTV, VoIP, infotainment…

Thanks to a multi-core CPU architecture, RailBox is able to support simultaneously two 802.11ac streams, allowing achieving higher speeds while avoiding potential interference with other networks and increasing the number of users connected and the connection speed.

The multi-user sharing features integrated into the 802.11ac combined to a standardized beamforming technology allow better signals concentration and direction over to the users for an enhanced WiFi experience.

APPLICATION HIGHLIGHTS

 > SEAMLESS & SECURE CAR COVERAGE

• Passengers network separated from service network (VLAN, QoS / WMM, tunnel)
• Dual WiFi for simultaneous 2.4 / 5 GHz operation
• Maximum 125 clients per radio, number of clients recommended for an optimal WiFi experience: 60 per radio
• High-speed 802.11ac (backward compatible 802.11a/b/g/n)
• WPA / WPA2, 802.11i, 802.1x (radius authentication)

> SEAMLESS DEPLOYMENT

• Dual radio architecture allows using the same product for in-car AP and carriage coupler (SRCC)
• Bypass relay option for “Daisy Chain” Ethernet topologies

> DIRECT CONNECTION TO TRAIN POWER SUPPLY

• 24-110 VDC insulated dual input power supply, PoE+

> RAILWAY HARDENED

• IP66
• Radio : WiFi : EN 300 328 (2.4 GHz), EN 301 893 (5 GHz, DFS) / LTE : EN 301 908 [-1, -2, -13], EN 301 511, EN 303 413
• EMC : WiFi : EN 301 489 [-1], [-17] / LTE : EN 301 489 [-19], [-52] / Railway : EN 50155, EN 50121-3.2
• Safety : EN45545-2 (HL3), NF F16-101 (M1F1) (Fire and Smoke), EN60950-1, EN62311
• Environmental : EN61373 (shock & vibration), EN60068 (climatic)

Car-to-car coupling system

High-speed radio redundancy solution for carriage coupling

Since network wiring between carriages may be difficult or often impossible, particularly in case of refurbishment operations because of aging or poor quality connectors, WiFi has naturally established itself as the most efficient solution by allowing redundancy, reliability and high-speed networking.

ACKSYS’ SRCC solution relies on wireless couplers that only need to be configured once and thus :

• supports any train composition change
• provides a redundant and reliable onboard network

SRCC and to train-to-trackside communication combined offer a complete network solution based on wireless to answer any application need : CBTC, CCTV, PIS, passengers WiFi access…

APPLICATION HIGHLIGHTS

> SMART REDUNDANT CARRIAGE COUPLING (SRCC*)

• Redundant onboard network with 2 WiFi couplers at both ends of each carriage
• Self-forming network: automatic carriage association in any order
• Smart pairing system preventing interconnection with neighboring trains networks

> HIGH THROUGHPUT COUPLING 802.11ac (900Mbps)

• o support heavy data transfers (CCTV, infotainment…)

> DIRECT CONNECTION TO TRAIN POWER SUPPLY

• 24-110 VDC insulated dual input power supply, PoE+

> DUAL RADIO DEVICES

• One RF for carriage coupling and the other on for in-car WiFi coverage

> RAILWAY HARDENED

• IP66
• Radio : WiFi : EN 300 328 (2.4 GHz), EN 301 893 (5 GHz, DFS) / LTE : EN 301 908 [-1, -2, -13], EN 301 511, EN 303 413
• EMC : WiFi : EN 301 489 [-1], [-17] / LTE : EN 301 489 [-19], [-52] / Railway : EN 50155, EN 50121-3.2
• Safety : EN45545-2 (HL3), NF F16-101 (M1F1) (Fire and Smoke), EN60950-1, EN62311
• Environmental : EN61373 (shock & vibration), EN60068 (climatic)

Uninterrupted train-to-trackside communications

One of the major concerns of rail operators is to establish a high-speed, reliable and continuous communication between a train in motion and the trackside for a smooth CBTC operation and also to collect data from CCTV, preventive maintenance, VoIP, PIS, etc. and retrieve real-time information of these data streams.

> THESE APPLICATIONS REQUIRE HIGHLY-AVAILABLE NETWORKS.

ACKSYS’ latest products combining WiFi 802.11ac and cellular connectivity enable a truly uninterrupted communication to be established with a seamless data flow between the on-board equipment and the trackside thanks to :

• a < 30 ms roaming between APs allowing error-free communications
• a redundant train-to-ground wireless link allowing a continuous communication even in case of failure of one trackside AP or one onboard client
• up to 500 Mbps high-speed data throughput at 350 km/h

APPLICATION HIGHLIGHTS

> MULTIPLE REDUNDANT MECHANISMS

• edundant train-to-ground communication, automatic assignment of front or rear radio (VRRP)
• Dual radio APs for trackside
• Hardware redundancy (wireless, Ethernet, power supply)

> 500 MBPS DATA THROUGHPUT AT 350 KM/H

• Connect before break technology
• Packet error rate (PER) < 0.1%

> ROAMING LATENCY < 30 ms

• Dualband, limitless channels
• Highly versatile roaming algorithm able to handle two-way traffic of a train
• IEEE802.11r fast transition protocol
• WiFi pre-authentication, OKC …

> DIRECT CONNECTION TO TRAIN POWER SUPPLY

• 24-110 VDC insulated dual input power supply

> NETWORK EFFICIENCY AND SAFETY

• Supports VLANs and tunnels
• Security : radius authentication

> EASY MAINTENANCE

• Configuration stored on a removable key

> RAILWAY HARDENED

• P66
• Radio : WiFi : EN 300 328 (2.4 GHz), EN 301 893 (5 GHz, DFS) / LTE : EN 301 908 [-1, -2, -13], EN 301 511, EN 303 413
• EMC : WiFi : EN 301 489 [-1], [-17] / LTE : EN 301 489 [-19], [-52] / Railway : EN 50155, EN 50121-3.2
• Safety : EN45545-2 (HL3), NF F16-101 (M1F1) (Fire and Smoke), EN60950-1, EN62311
• Environmental : EN61373 (shock & vibration), EN60068 (climatic)

GIGABIT BASED MOBILITY SUITE FOR TRAIN-TO-WAYSIDE COMMUNICATIONS

See on YouTube 

    *Optional 2nd radio interface (WiFi or cellular)   **Hardened memory key (configuration backup)