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…

ACKSYS-Carriage-to-carriage-003

 

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 (700Mbps)
- 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
- Safety : EN45545-2 (HL3), NF F16-101 (I1F1) (Fire and Smoke) / EN60950-1
- Radio : EN300-328 1.8.1 (2.4 GHz), EN301-893 1.7.1 (5 GHz, DFS)
- EMC : EN50155 / EN50121-3-2 / EN50121-4, EN301-489-1, EN301-489-17
- Environmental : EN61373 (shocks and vibrations), EN60068 (climatic)

 

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

Rugged WiFi device tailored for radio carriage coupling

 

 

 

 

RailBoxRailBox
Rugged dual 802.11ac WiFi access point, client & repeater for railways

FIRMWARE FUNCTIONALITIES
Roaming : < 30 ms, dualband, limitless channels, “mobile IP” for a seamless 4G LTE <> WiFi roaming (option)
Redundancy : SRCC, RSTP (Ethernet), routing redundancy (VRRP)
Routing functions : NAT router, router, 4G LTE router (option)
Streams segmentation and prioritization : WMM, QoS, VLAN, L2 tunnel, Multi-SSID (AP : 8 per radio)
Mesh : 802.11s (SAE secutity)
DHCP server : AP & client
Number of WiFi clients in AP mode (maximum) : 125 per radio (number of clients recommended for an optimal WiFi experience : 60 per radio)
Filtering rules : YES
Wireless security : 802.11i, 802.1x (radius authentication)
Administration : NDM, SNMP, WEB, C-Key (removable key for configuration backup)
Alarm signaling : SNMP traps, solid state relay
TECHNICAL CHARACTERISTICS
Radio interface : 1 or 2 WiFi or 1 WiFi + 1 4G, 1 or 2 x 1.3 Gbps, 802.11 a/b/g/n/ac, 2.4/5 GHz
Ethernet ports : 2 x 10/100/1000, M12
Bypass relay option (Daisy Chain Ethernet topologies) : YES
Dimensions (mm) : 80 x 175 x 57
Power supply : Dual input, 24 to 110 VDC, Isolated, PoE +
Environment : -25° to +70°C, option -40° to +85°C, IP66