The first TETRA System in India

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

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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 gt 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.

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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 gt50
  kms of Metro Rail tracks in Delhi by 2005.

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• 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.

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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

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Telecommunication Systems

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

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Radio System

• Train to Controller Communication
• Operations Maintenance Personnel
• Security Staff

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PMR Technologies

• MPT 1327
• Iden- (Motorolas Proprietary)
• ASTRO- (Motorolas Proprietary)
• EDACS (Ericssons Proprietary)
• APCO25-Digital/Analog FDMA
• TETRA-Digital TDMA-True Open Standard

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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 DMRCs investment for the
  next 15 years.

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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 TCS (Train
  control Signalling).
• Alcatel (Line 12) 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..

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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

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DMRC TETRA CONFIGURATION
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Radio CNE
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Radio Dispatch Sub-system

• The radio dispatch application was customized
  according to DMRCs 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.

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Radio Dispatcher
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Radio Dispatcher
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Dispatcher Train Table View
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Train Cab Radio
Radio Panel
Display
Handset
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Trainborne Radio Equipment Architecture
TRIU
TRIU
MR
MR
I/O
CPU
I/O
CPU
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

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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

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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.

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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

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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

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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

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Direct Mode Operation
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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

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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-30C to 60C

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MTM700 Specifications

• 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
• Hornlight output

• Environmental protection
• IP54 (dustwater ingress) std. Mobile
• MIL810 C/D/E (shock, vibration, drop ...)
• Mode of operation
• Simplex/duplex, TMO/DMO

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STATION RADIO PHONE
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Radio Tower (50 m)
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Remote Base Station (BTS)
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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

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Conclusion

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

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• THANK YOU