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

 

 

  

GIGABIT BASED MOBILITY SUITE FOR
TRAIN-TO-WAYSIDE COMMUNICATIONS
 
 

 

APPLICATION HIGHLIGHTS
 

> MULTIPLE REDUNDANT MECHANISMS
– Redundant 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
– 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)

  

 

Railway WiFi access points & cellular routers

 

  RailBox

RailTrack
  RailBox RuggedAir RailTrack

Function

Cellular router or dual WiFi access point

WiFi access point, client, repeater

WiFi access point & backbone repeater
Recommended for

ONBOARD

ONBOARD

TRACKSIDE & TUNNEL INFRASTRUCTURES

WiFi interface

WiFi 1 : 802.11n or ac
WiFi 2* : 802.11n or ac
2.4 / 5 GHz

802.11ac
2.4 / 5 GHz

WiFi 1 : 802.11n or ac
WiFi 2 : 802.11n or ac
WiFi 3 : 802.11n or ac
2.4 / 5 GHz
Cellular interface

2G / 3G / 4G LTE
Dual SIM
Multi-constellation GNSS

 

–

 

–

Maximum number of clients simultaneously connected in AP mode

125 per radio (number of clients recommended for an optimal WiFi experience : 60 per radio)

125 per radio (number of clients recommended for an optimal WiFi experience : 40 per radio)

N/A
TECHNICAL CHARACTERISTICS

Ethernet interface

2 x 10/100/1000
M12

2 x 10/100/1000
M12

2 x 10/100/1000 (M12)
2 x fiber (SFP cage)
PoE+ PSE injector

I/O

1 isolated input
1 isolated output

1 isolated input
1 isolated output

1 isolated input
1 isolated output

Dimensions (mm)

80 x 175 x 57

80 x 175 x 57

305 x 200 x 75

Power supply

Dual input – Isolated
24 to 110 VDC – PoE +

Dual input – Isolated
9 to 48 VDC – PoE

Isolated
110 to 230 VAC (50 / 60 Hz)

Environment
Operating temperature
IP rating

-25°C to +70°C
Or -40°C to +75°C
IP66

-40°C to +75°C
IP66

-25°C to +70°C
Or -40°C to +75°C
IP66
FUNCTIONALITIES

Roaming

< 30 ms

< 30 ms

N/A

Mesh (802.11s)

YES

YES

YES

Security

Firewall, DoS, https, MAC filtering, WPA/WPA2-Personal & Enterprise (IEEE 802.1X/RADIUS),
WEP, tunnels L2 (GRE), VPN (OpenVPN), SNMP V3

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

YES

N/A

Administration

http, https, SNMP agent (V1, V2C, V3), WaveManager administration software

Bypass relay option
 (Daisy Chain Ethernet topologies)

YES

NO

YES
C-Key** YES NO YES

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