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TETRA (CERN’s Safety Radio Communication Network ) Speaker : Aur é lie PASCAL IT-CS Tetra forum 7 th of February 2013. TETRA Infrastructure. Components of a TETRA Network :. DMO Direct Mode Operation. SwMI = Switching and Management Infrastructure. Network Manager.

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TETRA

(CERN’s Safety Radio Communication Network)

Speaker : Aurélie PASCAL IT-CS

Tetra forum 7th of February 2013

tetra infrastructure
TETRA Infrastructure

Components of a TETRA Network :

DMO

Direct Mode Operation

SwMI

= Switching and Management Infrastructure

Network Manager

Tetra Base Station (TBS)

DMO

Gateway/Repeater

TMO

Trunked Mode Operation

TBS

Gateway PABX/GSM

Base stations controller

Dispatcher

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 2

tetra @ cern
TETRA @ CERN

FREQUENCIES :TETRA (Terrestrial Trunked Radio) for European market (except Public safety services) works in the bandwidth : 410-430MHz

VOICE CAPACITY:17 simultaneous group calls (TDMA Multiplexing) / 500 devices

  • Scalable to many

DATA CAPACITY:

  • Short Data Service : SDS
  • Packet Data Service : maximum data rate 19.2kb/s

High resiliency:

  • Backup of eachactive equipmentand interconnections
  • Redundant TETRA coreequipmentlocatedon different sites

Interconnection with PABX : ISDN (2 redundant gateways)

 Consuming of frequencies, reserved to heads of the Fire Brigade

Relay of Swiss and French TETRAPOL frequencies :

  • Strong cooperation with Geneva Police, Customs, Swiss and French Public Safety services

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 3

network design
Network Design

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 4

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Indoor coverage

TBS A: Water Tower

FA1+FA2

TBS B : LHC4

FB1+FB2

No active equipment in LHC/SPS/PS

TETRAPOL

FA1+FA2

+Tetrapol

FB1+FB2

+Tetrapol

FA1+FA2

+Tetrapol

Site n

Site n+1

Site n+2

LHC / SPS

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 5

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TETRAPOL Repeating

Bdg 58

Channel-selectiverepeater CSR438

Pick-up antenna

TETRA A+B

TETRA C+D

Firemanat the surface

coupling

Bdg 4

Power?

Channels?

MU

Tx/Rx TETRAPOL

Band-selectiverepeaters

Fireman

LHC/SPS tunnel

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 6

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TETRA Calls

Standard group call :

Guard LHC8

One virtual group of communication

Guardgate B

CSA Dispatcher

Half-duplex call

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 7

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TETRA Calls

Dynamic group call :

One group of communication

Contrôle room EXCR

CSA

Fireman

Intervention Area

Fire Brigade Dispatcher

Electrical piquet

Fireman

Half-duplex call

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 8

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TETRA Calls

Individual call :

Electrical piquet

Half-duplex call

TI Dispatcher

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 9

tetra calls emergency issue at surface
TETRA Calls :Emergency issue at surface

L1 (1 575,42 MHz) & L2 (1 227,60 MHz)

TETRA BS

SDS : GPS positioning

DISPATCHER / FB

Emergency call or Lose of verticality

SDS : last known GPS positioning

Accuracy ~ couple of meters

Alarm& SDS received and automaticindividual call established

Dedicated IP Network

User entered in a building with TETRA coverage

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 10

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TETRA Calls :Emergency issue in underground facilities

Infrastructure for Indoor localization not yet ready

Alarm & SDS received and automaticindividual call established

SDS: positioning

Emergency call or Lose of verticality

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 11

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Example in LHC

DISPATCHER / FB

2. Whencatching the ID from the beacon, the terminal forwardsits location to the Dispatcher Workstation at the Fire Brigade

2

3

1

3. When incident : lose of verticalitydetected or emergency buttonpressed emergency SDS sent to the Fire Brigade Dispatcher and individual call established

1. The Beaconlocated in an alcovesendsits ID through a remoteantenna to TETRA terminal

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 12

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Surface radio coverage

Lose of communication due to forest

Base Station

Repeater

Lack of coverage due to relief

Software: ProManfrom AWE

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 13

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Indoor radio coverage

  • LHC experiments, LHC, SPS, PS, Booster, Linac tunnels… are covered with TETRA services but few minor issues are still to fix:
    • in LHC6 and LHC8, in the middle of the arc section, short area where the signal strength is quite low and communications may be lost.
    • SPS6 section of tunnel (from the middle of section SPS5-SPS6 to the middle of section SPS6-SPS7) is not yet covered by TETRA.

These issues will be fixed during LS1

  • Some areas are not covered for now:
    • The North area : tunnels TT81, TT82, TT83, TT84, TT85, TDC85
    • The transversal galleries in PS complex

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 14

support maintenance
Support / Maintenance

Infrastructure:

  • monitored 24/7 via the Computer Center over

Spectrum

    • no need for specific software tools
  • 1st level of maintenance doneby the First-Line team
  • 2nd levelof maintenance performed by CERN
  • 3rd level of maintenance performedby ourcontractor3T

Terminals:

  • Spare parts, repairingand configuration managed

by IT-CS for allterminalsthroughourcontracts

  • 1st batch provided by CERN
  • For furtherneeds, canbeboughtatCERN’s stores
  • Online training and practical one (Firebrigade) on radio delivery

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 15

slide16

2013 Planning

January:TETRA system operational for CSA & firemen!

First semester:

  • Deployment of Indoor Geolocalisation solution in one Arc section of the LHC and one Experiment
  • Installation of mobiles in firemen’svehicles
  • Distribution of terminals (Experiments, piquets…) and trainings
  • ESD distribution in all sites and new batteries for 4h of autonomy
  • Microwave Backup linkbetween the 2 main BS  coordination between ARCEP and OFCOM for the allocation of the frequency

And…:

  • Deployment of the Indoor Geolocalisation solution in LHC, SPS, PS, Booster, Linac.. tunnels, Experiments and critical areas (Computer Center…)
  • Development of a new fullyintegrated software platform ILDA (Indoor Localisation and DispatchAdd-On)

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 16

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ILDA

The Integrated Localisation and DispatchAdd-On (ILDA) is a client-server system, withdedicatedaccounts and specificpriviledges, whichwillintegrate:

  • The display of the localisation of TETRA radios (via GPS or Indoor Localisation System) on a fixedgeographical area or for a fixedlist of talk groups
  • The Dispatching featureswhichwillenable to establish calls and send SDS messages to defined radios through a Phonebook
  • An incident mode reserved to Firebrigadewithwiderfeaturessuch as direct interaction with the TETRA radios displayed on the maps (calls, SDS sending, selection of multiple radios to createdynamic group of communication…), a tracking mode, search of a specificmap (interconnectionwith GIS portal), transmit inhibition of a radio…, for which all actions willbelogged
  • An interconnectionwith CSAM centralizelevel 3 alarms: TETRA emergency alarms

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 17

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QUESTIONS

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 18

slide19

Underground radio coverage / issues

LHC8:

Lose of communication in the middle of the section

LHC6:

Lose of communication in the middle of the section

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 19

slide20

Underground radio coverage / issues

Experiments: the emergeny exits to access the PM lift, closed to the « trémie », are not coveredyet

SPS6:

No TETRA coverage

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 20

slide21

Underground radio coverage / issues

PS:

No coverage in the transversal galeries nor in the chicane of door 102

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 21

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Indoor geo-localisation :

available solutions

  • STProtect:
  • SYSOCO & SEPURA partnership
  • Beaconusing 868MHz frequency
  • Receiverintegratedinto the STP8000 terminal
  • Advantages:
  • Solution alreadycommercialised and evenbetter by SEPURA (recognizedplayer on TETRA market)
    • durabilityof the solution
  • Drawbacks:
  • Receiver not yetintegrated in the STP8X (ATEX)  on going
  • The beaconmayneed to beadaptedto enable a remoteextendedantennaand an externalPower Supply

Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013

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