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Tony McEvoy Railway Procurement Agency

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Tony McEvoy Railway Procurement Agency

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  1. TETRALuas Light Rail System Tony McEvoy Railway Procurement Agency April 2005

  2. Railway Procurement Agency • State Agency • 110 Employees • Responsible for procurement of Light Rail and Metro Infrastructure for Dublin • Recently completed delivery of the first phase of the Luas Light Rail System

  3. Luas - System Outline • Line A – 15km., Line B – 9km. • Light Rail Vehicles – Citadis – 40 no. • Mixture On-street/Off-street running. • Central Control Room at Red Cow Depot • Total cost €775m • Line B (Green Line) opened 30 June 2004 • Line A (Red Line) opened 28 September 2004

  4. Radio Key Functions • Safety and emergency management – risks associated with reintroducing electrified railway into heart of Dublin; tram interaction with other road users. • Service – operational performance & reliability.

  5. Luas Radio Users (Audio) • Central Control Room (CCR) Operators • Tram Drivers • Tram Passengers (on board PA) • Operations/Line Managers • Ticket Inspectors • Rolling Stock and Infrastructure Maintenance Personnel • Safety & Incident Managers

  6. Luas Radio Users (Data) • Automatic Vehicle Location System (AVLS) Localisation messages from trams • Download of timetable service files to trams • Real-time transfer of timetable adherence performance and headway messages to tram driver’s console • Facility for alphanumeric text messages between CCR and tram drivers

  7. AVLS Loop

  8. Luas Radio Key Requirements • High quality, reliable, resilient & secure transmission coverage over entire Luas network. • Accommodate both voice and data channels. • Facilitate both private and group calls • RTS type access (no dialling) with near-zero call set up times. • Have Press-To-Talk (PTT) type dialogues with other radio users, i.e. no full duplex speech. • Provide for Emergency call facilities (pre-emption)

  9. Radio Technology Choice • Radio system part of overall Design & Build type contract for Luas infrastructure construction. • Functional Requirements Specification with technology type left to market to decide. • Of the four consortia that bid for the Luas Design & Build contract, three proposed a TETRA solution.

  10. TETRA Positives • Excellent match with Luas key requirements • Digital quality and performance • Solid platform for future growth TETRA Negatives (2000/2001 View) • New technology – wary of being guinea-pig • Perceived health & safety PR implications

  11. Luas – D&B Contract Structure

  12. Luas Service Requirements • “Track Route” – 50m either side of track • “Operational Area” – 1.5km from track • On board Tram mobiles: -100% coverage with depots, shunting zones and along entire track route. • Handportables: -100% coverage with depots, at Stops & within Park & Ride car parks - Min 90% coverage along remainder of track route (99.56% achieved) • Motor Vehicle mobiles: - 100% coverage with depots, at Stops & within Park & Ride car parks - Min 90% coverage within operational area (99.92% achieved)

  13. Luas TETRA System Components • Motorola Dimetra-P Release 3.8 • Master Switching Centre (MSC) at Red Cow Depot • 4 Remote EBTS Base Stations, each with two transceivers (10W) • 80 MTM700 Mobiles for on board trams, 2 per tram (3W) • 60 MTP700 Handportables (1W) • 14 MTM700 Mobiles for Motor Vehicles (3W)

  14. Luas MSC Interfaces • CCR LAN (API for CCR Workstations / AVLS Servers) • Elite Dispatch Console • Full Vision Network Management Terminal • Zone Manager Local User Terminal • Telephone Interconnect Gateway to Luas PABX • X21 128kbits to each EBTS Base Station

  15. Red Cow Base Station • Antenna Height 30m • EBTS beside monopole base

  16. Liberty Hall Base Station • Antenna Height 53m • EBTS located on 17th floor under canopy

  17. Taney Bridge Base Station • Antenna Height 40m • EBTS under bridge deck beside A frame

  18. Hospital Stop Base Station • Antenna Height 10m • EBTS in nearby trackside Stop Cubicle

  19. Tram Driver’s Cab • Handset in desk • Dual function console (AVLS/radio) • Emergency footpedal under desk • Hidden microphone & loudspeaker in roof

  20. Antennas • Base Stations: Sigma Wireless Autorouter. 7/8” foam heliax feeder. • Mobiles: Low profile LHA roof antennas on board trams • Handportables: Small whip type allowing for typical body losses on belt

  21. Roof antenna on board trams

  22. AVLS Data Over TETRA • Used Short Data Transfer Service as bearer rather than PDS Packet Data Service • Avoided developing API for PDS • Timetable service files split to enable SDTS transmission

  23. Implementation • Coverage at Sandyford depot – resolved by adjustment of Taney Bridge antennas • Interference on tram driver’s handset when tram accelerating or braking • All resolved resulting in high quality, high reliability and successful operational system