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)
– To 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)

  

* SRCC is also available in non-redundant version with only 2 products by car.

Rugged wireless device tailored for radio carriage coupling

 

 

 

RailBox
RailBox in single-radio WiFi or dual-radio WiFi for carriage coupling and passenger APs

 CHARACTERISTICS
WiFi interface : Single or dual radio (optional 2nd radio interface)
      > WiFi 6 (2.4/5GHz) or 6E (6GHz), MU-MIMO 4T4R
Maximum number of clients simultaneously connected in AP mode : 512 per radio
Ethernet interface : 2 x 2.5Gbps – M12
I/O : 1 isolated input – 1 isolated output
Dimensions (mm) : 80 x 175 x 57
Power supply : Dual input – Isolated – 24 to 110 VDC – PoE +
Environment : -25° to +70°C – option -40° to +75°C – IP66
FUNCTIONALITIES
Roaming : < 30 ms
Mesh (802.11s) : YES
AP mode : load balancing, band steering, client roaming control, association control per SSID
Security : Firewall, DoS, https, MAC filtering, WPA/WPA2-Personal & Enterprise (IEEE 802.1X/RADIUS), WEP, tunnels L2 (GRE), VPN (OpenVPN, IPsec), SNMP V3, Rogue AP detection
Ethernet networking : Frames filtering, bridging, repeater, STP/RSTP, VLAN, DHCP (server & client), DNS relay
Ethernet routing : Multicast (PIM), IP redundancy (VRRP), static routes, NAT router, router
Carriage coupling system SRCC : YES
Administration : http, https, SNMP agent (V1, V2C, V3), WaveManager administration software
Bypass relay option (Daisy Chain Ethernet topologies) : YES
C-Key (hardened memory key/configuration backup) : YES

 

Use case

 

 

TER RENOVATION / MODERNIZATION

SNCF Voyageurs has launched a renovation and modernization program for TER (Regional Express Train) with the regions.
Mid-life, which means after about 20 years of service, the trains are fully revised to allow them to run for at least another 15 years.

It is in this context that the Train Digital-Market 6 tender was won by ACKSYS for the supply of inter-carriage modules. These ACKSYS modules allow the establishment of an inter-car WiFi link, thus creating a complete IP network on board the train…

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