CERN IT Department CH-1211 Genève 23 Switzerland t TETRA (CERN’s Safety Radio Communication Network) Speaker : Aurélie PASCAL IT-CS Tetra

CERN IT Department

CH-1211 Genève 23

Switzerlandwww.cern.ch/

it

TETRA(CERN’s Safety Radio Communication Network)

Speaker : Aurélie PASCAL IT-CSTetra forum 7th of February 2013

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CH-1211 Genève 23


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TETRA Infrastructure

Dispatcher

Network Manager

Base stations controller

Gateway PABX/GSM

Components of a TETRA Network :

Tetra Base Station (TBS)

SwMI= Switching and Management Infrastructure

TBS

TMOTrunked Mode

Operation

DMODirect Mode Operation

DMOGateway/Repeater

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

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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 each active equipment and interconnections Redundant TETRA core equipment located on 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

TETRA @ CERN


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Network Design


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LHC / SPS

TBS A: Water Tower

FA1 + FA2

TBS B : LHC4

FB1 + FB2

Site n+1Site n

FA1 + FA2

+Tetrapol

FB1 + FB2

+Tetrapol

Site n+2

FA1 + FA2

+Tetrapol

Indoor coverage

TETRAPOL


No active equipment in LHC/SPS/PS

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LHC/SPS tunnel

Band-selective repeaters

Bdg 4

Bdg 58Pick-up antenna

Channel-selective repeater CSR438

TETRA A+B

TETRA C+D

coupling

MUTx/Rx

TETRAPOL

Fireman

Power?Channels?

TETRAPOL Repeating

Fireman at the surface


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CSA Dispatcher

Guard gate B

Guard LHC8One virtual

group of communication

TETRA Calls


Standard group call :

Half-duplex call

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Contrôle room EXCR

Fire Brigade Dispatcher

Intervention Area Fireman

Fireman

CSA

Electrical piquet

One group of communication

TETRA Calls


Dynamic group call :

Half-duplex call

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TI Dispatcher

Electrical piquet

TETRA Calls


Individual call :

Half-duplex call

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L1 (1 575,42 MHz) & L2 (1 227,60 MHz)

TETRA Calls :Emergency issue at surface

TETRA BSDISPATCHER / FB

SDS : GPS positioning

Dedicated IP Network

Accuracy ~ couple of meters

User entered in a building with TETRA coverage

SDS : last

known GPS

positioning


Emergency call or Lose of verticality

Alarm & SDS received and automatic individual call established

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SDS: positioning

Emergency call or Lose of verticality

Alarm & SDS received and automatic individual call established

TETRA Calls :Emergency issue in underground facilities


Infrastructure for Indoor localization not yet ready

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Example in LHC

1. The Beacon located in an alcove sends its ID through a remote antenna to TETRA terminal

3. When incident : lose of verticality detected or emergency button pressed emergency SDS sent to the Fire Brigade Dispatcher and individual call established

1

2

2. When catching the ID from the beacon, the terminal forwards its location to the Dispatcher Workstation at the Fire Brigade

3

DISPATCHER / FB


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Surface radio coverage

Software: ProMan from AWE


Lack of coverage due to relief

Lose of communication due to forest

Base Station

Repeater

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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

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Support / Maintenance

Infrastructure: monitored 24/7 via the Computer Center over Spectrum

no need for specific software tools

1st level of maintenance done by the First-Line team

2nd level of maintenance performed by CERN

3rd level of maintenance performed by our contractor 3T

Terminals: Spare parts, repairing and configuration managed by IT-CS for all terminals through our contracts

1st batch provided by CERN

For further needs, can be bought at CERN’s stores

Online training and practical one (Firebrigade) on radio delivery


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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’s vehicles Distribution of terminals (Experiments, piquets…) and trainings ESD distribution in all sites and new batteries for 4h of autonomy Microwave Backup link between 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 fully integrated software platform ILDA (Indoor Localisation and Dispatch Add-On)

2013 Planning


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ILDA

The Integrated Localisation and Dispatch Add-On (ILDA) is a client-server system, with dedicated accounts and specific priviledges, which will integrate:

The display of the localisation of TETRA radios (via GPS or Indoor Localisation System) on a fixed geographical area or for a fixed list of talk groups

The Dispatching features which will enable to establish calls and send SDS messages to defined radios through a Phonebook

An incident mode reserved to Firebrigade with wider features such as direct interaction with the TETRA radios displayed on the maps (calls, SDS sending, selection of multiple radios to create dynamic group of communication…), a tracking mode, search of a specific map (interconnection with GIS portal), transmit inhibition of a radio…, for which all actions will be logged

An interconnection with CSAM centralize level 3 alarms : TETRA emergency alarms


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QUESTIONS


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Underground radio coverage / issues

LHC8:

LHC6:

Lose of communication in the middle of the section

Lose of communication in the middle of the section

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SPS6:

No TETRA coverage

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

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PS:

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



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Indoor geo-localisation : available solutions

• STProtect: SYSOCO & SEPURA partnership Beacon using 868MHz frequency Receiver integrated into the STP8000 terminal

Advantages:- Solution already commercialised and even better by

SEPURA (recognized player on TETRA market) durability of the solution

Drawbacks:- Receiver not yet integrated in the STP8X (ATEX) on

going- The beacon may need to be adapted to enable a remote

extended antenna and an external Power Supply

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

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CERN IT Department CH-1211 Genève 23 Switzerland t TETRA (CERN’s Safety Radio Communication Network) Speaker : Aurélie PASCAL IT-CS Tetra