IntroductionOverview

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© Dragontech Systems | www.dragontech.hk

BROADBAND ROUTERS FOR TRAINS

Broadband Routers for TrainsContents

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Demands on OperatorEnabling with Broadband Connectivity

ApproachSecure Multipath Connectivity

Internet On-The-MoveKey Considerations

StrategyBroad-Band Internet On-The-Move

TopologyModes of Operation – Uplink ConnectionMultiple Uplinks Increase Coverage

Network CoverageHow Many Uplinks are Needed?

Routing OverviewVPN Connection with HandoverConnection with VPN, live-view VideoLoad Balanced Multi-Link Connection

Passenger WiFiOn-Board Proxy Server

System ManagementRemote Monitoring SystemRailway RouterSystem OverviewSystem Description

Demands on OperatorEnabling with Broadband Connectivity

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SAFETY CUSTOMER SERVICE TRAIN OPERATIONS IT EFFICIENCY

On-Board

Situational

Awareness

Quick Response

and Intervention

Capability

Always-On

Communciation

Platform

Real-Time

Information

Personalized

Entertainment

Ticketing and

Fare Collection

Seat Reservation

WiFi Service

Condition Based

Maintenance

Digital Info and

Advertizing

Data Collection

for Vending,

Catering Sales

or ATM

Scalable System

Roll-Out

Inter-operability

Management

Zero-Touch

Configuration

Dragontech Systems delivers service-aware intelligent access products which

enable new services and ensure critical IP communications, leveraging connectivity

over multiple mobile or wireless networks.

Mobile Network

Link 2

Link 1

Link 3

Internet,

Control Center,

Cloud

ApproachSecure Multipath Always-ON Connectivity

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Internet On -The-MoveKey Considerations

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Challenges:

– Data connectivity of a moving train

– Service availability, coverage

– Achieving adequate bandwidth

– Variations in field strength, latency, throughput

– IP address management

– Handover speed and session persistence

– Security

– Remote management

– Scalability

Conclusion:

- Advanced multi-uplink routing technology required

- Hand-Over and Load Balancing improve solution

StrategyBroad-Band Internet On-The-Move

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Software-Centric Approach

Wireless Technology Agnostic – LTE, 3G, CDMA2000, WiFi, Satellite

Multipath Handover Routing and Dynamic Load Balancing

Open Source Solution – Linux

Capability to Integrate with Other On-Board IP-systems

Supporting all HW Architectures , x86 and ARM

Platforms for Specific Verticals (Railway, Bus, Public Safety)

Platform Compliance with Relevant Standards, CE, EN50155, 50121, 61373, ”e” etc.

Remote Management Support

Simple IT Back-End – no Mobile IP gateway required

TopologyModes of Operation – Uplink Connection

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Handover Mode with VPN

• Applications: Video Surveillance, Condition Based Maintenence, Operative Systems

• => Increase coverage and service availability

• One uplink with VPN (IPSEC) used at a time

• All available uplinks are in hot standby

• Immediate and transparent handover with connection persistence

• Connections managed based on link availability, response time,and performance

Dynamic Load Balancing Mode

• Application: Passenger WiFi Service, PIS

• => Increase bandwidth and coverage

• Load balancing on uplink and downlink

• All links are used together to increase bandwidth (not speed)

• Traffic dynamically allocated to available uplinks

Network CoverageHow Many Uplinks are Needed?

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• Achieved data capacities 2-5Mbit/s downstream and 0,5-1 Mbit/s upstream (HSPA+ service)

• Total Time – 3347s

• No Internet Connection Available – 1s

• Internet Connection – 3346s (100%)

• Good communication on all 3G Uplinks – 2397s

• No communication available Operator 1 – 83s

• No communication available Operator 2 – 8s

• No communication available Operator 3 – 12s

100% coverage combining three

different operators

Network A

Network B

INTERNET

Network C VPN + HAND OVER GW

Used VPN connectionAlternative Available VPN connection

Application Servers

Maintenence Center

Routing OverviewVPN Connection with Handover

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Management Access

192.168.0.xTRAIN GATEWAY

192.168.0.xPA/PIS SERVER

ETHERNET BACKBONE

CANMVBFIP

192.168.0.x PLC CONTROLLER

DIGITAL I/OANALOG I/OSERIAL

192.168.0.1 – ROUTER

192.168.0.xHMI

3G/LTE

3G/LTE

CDMA2000

VPN

Video Server

1.1.1.1 (VPN GW)

Control Center Private Network

1.1.1.11Train Number 10

Control Room

192.168.0.1 – Local Router Gateway address

192.168.0.2 – Local IPCAMERA

192.168.0.x – Local IPCOMPUTER

192.168.0.y – Local IPNAS STORAGE

Live-View VideoConnection with VPN

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VPN

VPN

Network A

Network B

Internet Backbone

Network C

Used VPN connection

Management Access

Management System

Routing OverviewLoad Balanced Multi-Link Connection

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VPN + LOAD BALANCER GATEWAY

Application Servers

Router SEPIA Proxy Server

Train Network

Passenger WiFiSEPIA - On-Board Proxy Server

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ManagementServer

VPN LOAD BALANCER GW

AAA Server

LTE/3G #1

INTERNETLTE/3G #3

LTE/3G #2GPS

GLONASS

SATELLITE

Features

• Train location, speed and heading and router status

• Network quality, field strength data usage logging

• Administrator able to control, manage, configure and update routers from remote

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System ManagementRemote Monitoring System

Railway RouterSystem Overview

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• 3 or 4 3G/LTE network uplinks supported

• Dual redundant GPS receivers

• Router maintains all available connection

active and in parallel use

• Active VPN open on all connections ensures

“0-Delay” handover and routing of traffic

• 3G/LTE network qualification criteria

– Cell type

– Signal strength

– Data throughput

– Latency

• All available networks used dynamically

in parallel with active dynamic load

balancing ensuring maximal available

bandwidth for WiFi clients

(2) 3G/LTENETWORK

WLAN( AP )

GbitETHERNET

IN-VEHICLE LAN WAN

(3) 3G/LTENETWORK

(1) 3G/LTENETWORK

DualGPS

(4) 3G/LTENETWORK

GbitETHERNET

RIDE-IT-R Railway RouterSystem Description

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• Purpose-built for Railway Applications

• Embedded x86 Linux Computer

• Dragontech Advanced Routing Firmware

• WWAN

– Up to 4x 3G/LTE Uplinks

– 802.11 WiFi

• LAN

– 2x 10/100Mbit Ethernet Ports

– 802.11 WiFi

• Dual GPS receivers

• 24/48/72 or 110VDc Power Input

• 1500VDc Isolation

• M12 D-coded Ethernet Connectors

• -40 to +70C Operating

• Conformally coated electronics (EN50155)

• Full Railway Compliance

– EN50155

– EN50121

– EN55011

– EN61373

– IEC 61000-X-X

– EN60950

Asia Headquarterswww.dragontech.hksales@dragontech.hk

Contact Information

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