1. Communications System for Railway
IRSE Presentation :
Communications System for Railway
Presented by
Martin Pang ACSP(COM)

2. Communications System
Mass Rapid Transit System (MRT) 2

3. MRT & LRT System Map Red Line – North South Line
Green Line – East West Line
Purple Line – North East Line
Yellow Line – Circle Line
Blue Line – Downtown Line
Brown Line – Thomson East Coast Line
Grey Line - LRTs

4. Agenda Communications System in MRT
Communications System in MRT System
Train-borne Video Surveillance System
Communications System interface with Signalling

5. Why there is need for Communications System in MRT?
Train Operations
Emergency and Train Service Disruptions

6. MRT Communications System
Communications System for Train Operations:
Crowd control management
Allow Operator to broadcast announcements, updates and advisory information.
Commuter Assistance e.g. Commuter communicate with Staffs
Post incident investigation
Security

7. MRT Communications System
Communications for
Emergency and Train Service Disruptions
Communication for evacuations, detrainment and etc.
Communications to broadcast, update and provide advisory to commuters in other non-incident trains.
Communications to support personnel for evacuation, recovery and resumption to normal services.

8. Communication for Other Government Agencies
Why Communications System in RTS?
Communication for Other Government Agencies
Communications for security & emergency personnel in MRT stations, trains & in tunnels.
Singapore Police Force
Singapore Civil Defence Force

9. What is Communications System?
RTS Communications System
What is Communications System?

10. Basic components of a communication system
What is Communications
Basic components of a communication system
Transmitter
Receiver
Medium/Channel
Wired, e.g. fibre optic, copper, coaxial cables, etc.
audio
data
Wireless, e.g. wireless LAN, Bluetooth, infra-red, microwave, cellular, etc.
video

11. Communications System for MRT Driverless Train Operations
Stations
In-Train
Train VSS

12. Station Travel Info System
MRT Communications System Overview
Others
Depot
Operation Control Centre
Others
Depot
Others
Communication Backbone Network (CBN)
Typical MRT Station
CBN Node
OCC
Radio System Track Side
Leaky Coaxial (LCX) Cable
Train-borne Video Surveillance System (VSS) Trackside Wireless Access Point
Trunked
Radio
Telephone
Intercom, etc.
Public Address
Station VSS
Train-borne VSS
Clock
Station Travel Info System
Other
Systems

13. In-train Video Surveillance System for Driverless train Operations.
RTS Communications System
In-train Video Surveillance System for Driverless train Operations.

14. Train CCTV System for Driverless train Operations.
Train-born Video Surveillance System
Train CCTV System for Driverless train Operations.
Video Recording – Post Incident Investigation
OCC to Train – Camera Selections
Video Streaming to OCC
External viewing – Detrainment
Train to OCC – Events trigger
PEC (passenger emergency communications)
Saloon door Obstruction
Saloon door emergency handle switch activation
Driving Console cover removal
Detrainment door activation
Fire extinguisher removal
Smoke detector activation

15. Train-born Video Surveillance System
OCC
Fibre Optic Cable
In Tunnels
Communication Backbone Network

16. Train-born Video Surveillance System
OCC Camera Selection
1) OCC to Train Camera Selection
E.g. Train Nos.#36, Camera #2
Search for Train#36
Found Train#36 at Station T23
4) Send request to Train#36 and select image from cameras#2
5) Send video stream cameras#2 back to OCC

17. Train to OCC (Automatic Triggering)
Train-born Video Surveillance System
Train to OCC (Automatic Triggering)
Automatic display of train-borne camera images at OCC on detection of following triggers:
(a) PEC activation
(b) Saloon door obstruction
(c) Driving console cover opening
(d) Detrainment door activation
(e) Fire extinguisher removal
(f) Saloon door Emergency Handle
Switch activation and
(g) Smoke detection

18. Train-born Video Surveillance System
OCC
Video Transmission - Handover
Video signals are continuously send from train to track side APs.
The TVSS Gateway (GW) will receive the video signals from the arrays of trackside APs
Communication Backbone Network
Fibre Optic Cable
In Tunnels

19. Train-born Video Surveillance System
Seamless Handover
Seamless Handover from Station to Station will take place train wireless device established connection the AP from next stations
OCC
Station A
Station B
Network Switch AP
Network Switch AP
AP - Access Point
Position A
Position B

20. Train-born Video Surveillance System
Front camera for Detrainment

21. Fibre Optic cable to tunnel APs POE – Power Over Internet
Train-born Video Surveillance System
TVSS Trackside Equipment
LAN Cable
Network switch in
MRT Station
Access Point
with Antenna
Fibre Optic cable to tunnel APs
FO Cable
LAN switch
Power supply Cable
POE
POE – Power Over Internet

22. Communications System Interface with Signalling
MRT Communications System
Communications System Interface with Signalling
Signalling System
Public Address

23. Thank You