rodrigo alvarez - public transport authority of western australia
TRANSCRIPT
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CBTC DCN RequirementsRodrigo AlvarezSenior ICT Consultant
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
How fundamental are Communications to CBTC?
CBTC =Communications Based Train Control
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
Data Communications Network (DCN)
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
Wayside Transmission Network
àWayside Transmission Network• Today → Gigabit Ethernet WAN• Future → Potentially MPLS-TP
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
Wayside Bandwidth Requirements
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
Wayside Bandwidth Requirements
à IXL-OC / OC-IXL 200 kb/s – 1 Mb/sà IXL-IXL 8 kb/sà IXL-ZC / ZC-IXL 40 kb/sà IXL-ATS / ATS-IXL 10-20 kb/s
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
Wayside QoS Requirements
àE2E Latency: 10-20 msàNetwork Recovery Time: 50-300 msàBit Error Rate: 10#$
àAvailability: 99.999%
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
Network Architecture
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
Train-to-Wayside Radio Networkà ATP+ATOàWayside Transmissionà Radio Core(s)à Radio Access Networkà Onboard Radio
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
Radio Communications Requirements
à Train sends Position Update every 200ms – 3sà Zone Controller sends Movement Authority every 200ms – 20sà Data rate in the order of 50 kb/s UpLink + 50-100 kb/s DownLinkà BUT every supplier offers a different proprietary solution
PUPU
MA
PUPU
MA
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
Wi-Fi Architecture in Tunnels
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
Wi-Fi Overground Architecture
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
LTE Architecture in Tunnels
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
LTE Architecture Overground
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
Availability
àOptions to support system-wide 99.99% availability:• Dual Core architecture
• Cold/Warm/Hot Standby• Traffic load sharing
• Additional RAN Coverage• Overlapping Cells• Dual Layer
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Complex Solutions, Delivered Simply.COMPLEX SOLUTIONS, DELIVERED SIMPLY
Mobile Network Architecture