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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
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
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
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
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
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 3
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
Network Design
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 4
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
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
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 5
No active equipment in LHC/SPS/PS
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
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
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 6
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
CSA Dispatcher
Guard gate B
Guard LHC8One virtual
group of communication
TETRA Calls
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 7
Standard group call :
Half-duplex call
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
Contrôle room EXCR
Fire Brigade Dispatcher
Intervention Area Fireman
Fireman
CSA
Electrical piquet
One group of communication
TETRA Calls
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 8
Dynamic group call :
Half-duplex call
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
TI Dispatcher
Electrical piquet
TETRA Calls
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 9
Individual call :
Half-duplex call
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
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
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 10
Emergency call or Lose of verticality
Alarm & SDS received and automatic individual call established
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
SDS: positioning
Emergency call or Lose of verticality
Alarm & SDS received and automatic individual call established
TETRA Calls :Emergency issue in underground facilities
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 11
Infrastructure for Indoor localization not yet ready
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
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
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 12
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
Surface radio coverage
Software: ProMan from AWE
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 13
Lack of coverage due to relief
Lose of communication due to forest
Base Station
Repeater
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 14
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
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
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
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 15
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
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
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 16
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
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
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 17
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
QUESTIONS
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 18
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 19
Underground radio coverage / issues
LHC8:
LHC6:
Lose of communication in the middle of the section
Lose of communication in the middle of the section
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 20
Underground radio coverage / issues
SPS6:
No TETRA coverage
Experiments: the emergeny exits to access the PM lift, closed to the « trémie », are not covered yet
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
PS:
No coverage in the transversal galeries nor in the chicane of door 102
Aurélie PASCAL IT-CS / TETRA Forum 07-02-2013 21
Underground radio coverage / issues
CERN IT Department
CH-1211 Genève 23
Switzerlandwww.cern.ch/
it
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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