TETRA makes the difference a technology overview for users

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TETRA makes the difference!- a technology
overview for users

• TETRA MoU Conference Delhi
• February 2006
• Alister Bailey BSc(Hons) MIEE
• Vice Director Development
• Rohill Technologies B.V.

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Presentation Overview

• Who is TETRA designed for?
• How has TETRA evolved?
• What is TETRA?
• TETRA staying at the fore-front

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Organisations

• With Critical communications need
• Work with others
• Respond to change
• Map the network to the user(s)
• Multi-agency networks

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Mission/Business-Critical Networks

• Needs-
• Communications everywhere
• Fixed and deployable networks
• Mixed traffic skinny/dense
• Flexibility
• Security
• Resilience
• Extra-Network operation (DMO)

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Evolution
2006
3000BC
Vehicle fixed
Portable portable
Manpack mobile
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Products

• Multiple Vendors Mature proven
• Feature rich Fault tolerant
• Interoperable(IOP tested)
• Compact (terminals and infrastructure)

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Why is TETRA so good?

• The Best of everything
• Technologies
• Interfaces
• Standards
• Integration
• Maps to your organisation
• Future-proof

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The Best Technologies

• Air interface
• 18kbaud p/4 DQPSK in 25kHz channel gt 36kbit/s
• 4 channels in 25kHz using TDMA . . .
• Adjacent channels useable.

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The Best Technologies

• TDMA structure
• Signalling during calls

User data
Synchronisation patterns
a data-burst every 14ms
4 per frame
18 per hyper-frame(1.02 sec)
1 2 3 . 17 18 1
time
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The Best Technologies

• Environments
• Low and High speeds (fading) channel coding
• Urban (TU) /Hilly terrain (HT) multipath
  equalisation/diversity

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The Best Technologies

• Speech VOCODER (VOice CODer DEcodeR)
• 3.456 kbit/s ACELP (efficient! GSM is
  13.2kbit/s, telephones use 32or64kbit/s)
• With error correction fills 7.2kbit/s (single
  timeslot)
• Quality is good
• Can filter out background noises
• Robust to errors and stealing
• Suited to encryption

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The Best PMR Interface

• Voice
• Full duplex
• Group calls
• Broadcast calls
• Emergency calls
• Up to 4 per carrier
• Digital quality

!
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The Best PMR Interface

• Robust Data
• Access via PEI interface in mobiles/portables
• Serial (2.4kbit/s protected to 28.8kbit/s)
• Packet (3.6 kbit/s protected to 14.4kbit/s)
• Messaging (status/text)
• GPS locations
• Error protected and corrected

.010010101001011001111010010101101001..
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The Best Technologies

• Networks
• IP backbones (soft-switch technologies) have
  replaced telephony switches
• Fully distributed databases
• Redundancy resilience
• Self-configuring, out-of-box operation
• Portable systems
• VPN connections for secure remote access
• Integration with existing networks

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The Best PMR Functionality

• Over 30 Services including
• Call priorities
• User priorities
• Call pre-emption
• Handover
• Air i/f end-end encryption
• OTAR (remote re-keying)
• Dynamic groups
• Late entry
• Discreet listening
• .ask your supplier(s) for more information!

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The Best Standards

• Developed at ETSI
• by Users and Manufacturers (EN300-392 series)
• Fully open standard
• IPR on fair and reasonable terms
• Free downloads www.etsi.org
• Multi-vendor
• 23 companies making core products and growing
• Interoperability IOP independently tested
• See www.tetramou.com for certificates
• Ongoing TETRA 2 features

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The Best Integration

• Systems using Open Interfaces
• POTS PSTN E.1/T.1/V.11/V.35/G.703/
• PABX Intranet QSIG/2,4wire/EM/
• Cellular MPT1327/43 SS.7/ISDN/ethernet/
• LMR/PMR . . . satellite/ . . . and more

• HTTP
• SSL
• SNMP
• SMB
• IPSEC
• TCP
• UDP
• IP
• SSH
• FTP
• WAP

Remote NMS
Integrated fleet of terminals
Internet
PABX
PSTN
TETRA Exchange(s) sites
Voice-data Logging Server (VLS)
3rd party Application Server
Firewall
Integrated Command Control Systems (ICCS)
Legacy-network
(IP) Intra-network
Network Management System (NMS)
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The Best Integration

• Integrated/embedded Applications ICCS
• (Remote) Network Management Monitoring
• Location tracking (AVLS) Dispatch
• Voice-data recording/playback Lone worker

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Where do we go next?

• Build on TETRA-1 . . .
• Keep everything compatible !!
• Deployable/extendible systems
• Flat hierarchy (national IP networks)
• Integrated applications
• Extend the standard
• Increased Range ground-air
• Data rates (TEDS) up to 150kbit/s (multichannel
  500kbit/s)
• New voice codecs (3G, STANAG, etc)
• IOP test the Inter-system interface?

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When its Critical TETRA makes the difference!

• Alister Bailey a.bailey_at_rohill.nl
• Rohill Technologies B.V. www.rohill.com
• TETRA MoU www.tetramou.com