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The first TETRA System in India A Brief by- PRASHANT RAO Chief Communication Engineer

The first TETRA System in India A Brief by- PRASHANT RAO Chief Communication Engineer DMRC. Delhi – the need for a mass rapid transit system.

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The first TETRA System in India A Brief by- PRASHANT RAO Chief Communication Engineer

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  1. The first TETRA System in India • A Brief by- • PRASHANT RAO • Chief Communication Engineer • DMRC

  2. Delhi – the need for a mass rapid transit system • As cities grow in size, the number of vehicular trips on road system goes up. This necessitates a pragmatic policy shift to discourage private modes and encourage public transport. • Delhi has experienced phenomenal growth in population in the last few decades. Its population has increased from 57 lakhs (5.7M) in 1981 to > 120 lakhs (12 M) presently. • For want of an efficient mass transport system, the number of motor vehicles has increased from 5.4 lakhs (540k) in 1981 to 40 lakhs (4M) by now. • The number of motor vehicles in Delhi is now more than that of Mumbai, Calcutta, Chennai put together. The result is extreme congestion on Delhi roads, ever slowing speeds, increase in road accidents fuel wastage and environmental pollution with motorized vehicles alone contributing to about two thirds of the atmospheric pollution.

  3. Delhi Metro Rail Corporation • To rectify this situation the Government of India and the Government of National Capital Territory of Delhi, set up a company named Delhi Metro Rail Corporation Ltd. • DMRC was then given a mandate to construct >50 kms of Metro Rail tracks in Delhi by 2005.

  4. Work on Phase I started in 1998 • First section between Shahdara and Tis Hazari was opened on 24th Dec 2002. ( ~8 Km) • Now ~55 km operational in total.

  5. Delhi Metro • Line I ( Shahdara – Rithala) ~22 km • Line I ( Shahdara – Rithala) was made operational for commercial services in three stages: • Shahdara – Tis Hazari : with effect from 25th Dec, 2002 • Tis Hazari – Inderlok : with effect from 4rd Oct, 2003 • Inderlok – Rithala : with effect from 1st April, 2004 • Line II ( Vishwavidyalaya – Central Secretariat) ~11 km • Vishwavidyalaya – Kashmere Gate: with effect from 20th December, 2004. • Kashmere Gate – Central Secretariat : w.e.f 3rd July, 2005. • Line III ( Barakhamba – Dwarka Sub City ) ~ 23 Km • Barakhamba Road- Dwarka Section: w.e.f 31 Dec,2005 • Extension of Line III – on-going • Extension into Dwarka sub-city • Barakhamba Road- Indraprastha Extension

  6. Telecommunication Systems • Fibre Optics –SDH/Access • Radio System-TETRA • Centralised CCTV • Centralised Public address • Centralised Display Systems • SCADA System • Centralised Master Clock System

  7. Radio System Train to Controller Communication Operations & Maintenance Personnel Security Staff

  8. PMR Technologies • MPT 1327 • Iden- (Motorola’s Proprietary) • ASTRO- (Motorola’s Proprietary) • EDACS – (Ericsson’s Proprietary) • APCO25-Digital/Analog FDMA • TETRA-Digital TDMA-True Open Standard

  9. Why TETRA • TETRA was selected as the radio technology for the following reasons: • Open Standards • Guaranteed minimum performance.(~ 500 ms Setup time) • Provides evolutionary growth. • Sourcing from more than one vendor. • Competitive pricing. • Frequency Efficient. • Integrated voice and data. • Site Trunking & DMO • TETRA will safeguard DMRC’s investment for the next 15 years.

  10. DMRC Radio System • Digital Trunked Radio System operating in 380-400MHz conforming to ETSI TETRA standard • Calling of Train by Train Identity Number (TID) • Customized GUI Screen for Dispatch Operator • Train Radio Control Panel for train drivers • Interfaces to other Telecommunication Subsystems such as FOTS (fibre optic transmission system), PA (public address), EPABX and TC&S (Train control & Signalling). • Alcatel (Line 1&2) and Siemens (Line 3) supplied the telecommunication system including the radio system. • Motorola was selected as the sub-supplier to provide the TETRA integrated digital radio system for all the Lines uptill now..

  11. System Sizing • The scope of work executed includes: • Central Network Equipment(SwMi) at Master Site • 11 x Radio Base Stations ( +4 More Under Commissioning) • 2 Base Radios per site • 8 x Customized GUI Dispatchers • 50 x 2 Trainborne Mobile Radios • Mobile Radio, Train Control Interface, Radio Control Panel • 55 Fixed Radios • Standard Mobile Radio installation • 500 Portable Radio

  12. DMRC TETRA CONFIGURATION

  13. Radio CNE

  14. Radio Dispatch Sub-system • The radio dispatch application was customized according to DMRC’s operational requirements. • The development of application is based on Application Program Interfaces • The required functionalities are performed from the customized GUI of the dispatch terminals. Key functions include: • Calling of trains by their assigned Train Identity Number or RakeID • Full duplex private calls between Dispatcher and Train Drivers. • PA announcement to trains from Dispatcher at OCC. • Etc.

  15. Radio Dispatcher

  16. Radio Dispatcher

  17. Dispatcher – Train Table View

  18. Train Cab Radio Radio Panel Display Handset

  19. Trainborne Radio Equipment Architecture TRIU TRIU MR MR I/O CPU CPU I/O TRCP TRCP DC/DC DC/DC Fall Back Link • Trainborne Radio Equipment consists of • Mobile Radio • Train Radio Control Panel • Train Radio Interface Unit • Implemented in the Front and Rear cab • Fall Back connection to Rear cab • Operating in the standby mode to the Front cab

  20. Users Driver EPABX Radio Network OCC RCW DCC RCW Train Train Radio Communication Capability • Call Features • Individual Call • Group Call • Emergency Call • Direct Mode Operation (DMO) Call • Telephone Interconnect Call • Call Matrix • Train Radio - OCC • Train Radio - DCC • Train Radio - Train Radio • Train Radio - EPABX • Train Radio - Hand Portable

  21. Direct PA Announcement from OCC to Inside of Train • In case of Emergency (e.g. Driver incapacitated), Controller can Make Direct Announcement inside Train • Pre_Recorded Announcement through Front Active Cab-Simultaneous Voice +Data • Live Announcement through Back Cab-Driver can still use front Radio • Implemented by Interfacing of On-Board Radio to On-Board PA System.

  22. Subscriber Radio Features Group Mode Operation • Excellent voice quality • Fast call set-up (300 ms) Emergency Button Operation Private Mode Operation Phone Mode Operation Status Mode Operation Short Data Transport Service Access Text Message Operation Packet Data Service Access Site Trunking Operation Direct Mode Operation Talkgroup Scanning

  23. Portable to EPABX/PSTN Call • Selected Users allowed Portable to EPABX\PSTN calls • Both Incoming\OutGoing Calls allowed • Full Caller ID available • Full Duplex Voice Calls, just like a GSM Phone

  24. Radio to Station PA Announcement • In Emergencies, Portable to Station PA announcement facility. ( Fire, Evacuation,etc) • Good Quality Voice due to inherent improved Quality of TETRA • Can Select a Particular Station Number and a particular Zone ( UP-PF,DN-PF,Concourse,Full,etc) • Implemented by Radio Interface to EPABX and further EPABX Interface to PA

  25. Direct Mode (DMO) Direct Mode (DMO) DMO-gateway Network Trunked Mode Direct Mode (DMO) Direct Mode (DMO) DMO-repeater Direct Mode Operation

  26. Radio Coverage in Underground • Is by LCX Cables and Indoor Antennas • Bi-directional Amplifiers(BDA)/RF-Optical Repeaters provided at every station ,feeding cables into tunnels and station areas. • LCX cables are also provided for GSM/CDMA operators for Mobile coverage

  27. MTP700 Specifications • Battery life (with Std LiIon or NiMh Battery) 24 Hours (5/5/90), 15 Hours (5/35/60) • Environmental protection IP54 (dust & water ingress) MIL810 C/D/E (shock, vibration, drop ...) • Mode of operation Simplex/Duplex, TMO/DMO • Bands 380-430 MHz • RF power 1 Watt • RX sensitivity -112 dBm minimum • Audio power (speaker) 500 mWatt • Operating Temp:-30°C to +60°C

  28. MTM700 Specifications Environmental protection IP54 (dust&water ingress) – std. Mobile MIL810 C/D/E (shock, vibration, drop ...) Mode of operation Simplex/duplex, TMO/DMO • Bands • 380-430MHz • RF power • 3 Watt • RX sensitivity (static/dynamic) • -112/103 dbm minimum, typically 2 dB better • Audio power (speaker) • 5 W minimum • Operating/storage temperature • -30 to +60/-55 to +85 • Other • Ext. PTT input • External foot/hand emergency input • Horn&light output

  29. STATION RADIO PHONE

  30. Radio Tower (50 m)

  31. Remote Base Station (BTS)

  32. Items Need to be Addressed by Manufacturers • ISI- A true Interoperability with Mobility/Roaming and not just Talk Group Patching. • Fully Non GPS Based Sites • Dual Mode Mobiles with GSM-R/TETRA • TETRA over WLAN with Dual Mode Mobiles

  33. Conclusion • TETRA communication system has been implemented successfully • The signals are clear • The voice clarity is excellent • The TETRA Technology effectively meets DMRC’s operational and functional expectations.

  34. THANK YOU

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