Mark Edwards

1
TETRA Release 2 Overview
Release 2
Mark Edwards Principal Staff Engineer Motorola
CGISS European System Design Centre
2

• TETRA release one in use today
• What is TETRA 2 High Speed Data?
• TETRA 2 opens a world of applications
• Future vision the application world after TETRA
  2
• Where are we in real life!

3
Does TETRA1 handle data?

• Database look up
• AVL
• Email
• File transfer
• Limited slow scan video
• But multimedia applications are more difficult.

4
Mission Critical Data Applications on TETRA

• Todays applications need data capacity
• Frequent messages, small payload
• AVLS from portables and vehicles
• Database access
• Status messaging
• But some applications starting to need more data
  throughput
• Less frequent messages, much bigger payloads
• Mug shots
• File transfer
• Slow scan video

TETRA Single Slot Packet Data
TETRA Multi Slot Packet Data
5
Evolution Applications vs. TETRA
today
Not suitable
Suitable
Effective
6
TETRA Enhanced Data Service - TEDS

• Backward compatible with TETRA Release 1
• Network integration capability

• Flexible data rates and spectrum use
• 25, 50, 100 and 150 kHz channels bandwidths
• Can trade off data rate, spectrum and range

• Integrated TETRA 1 and TEDS system
• i.e. can receive TETRA 1 calls on TEDS channels

• Technology selected for TEDS use
• Multi-carrier QAM (Quadrature Amplitude
  Modulation) in all bands
• D8PSK in 25 kHz

TAPS - an alternative technology based on GSM
EDGE - has now been abandoned
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High Speed Packet Data Deployment

• TEDS will be the solution for mission critical
• A range of channel bandwidths available in the
  standard
• Offer a single TEDS channel at each site, in
  addition to TETRA 1 voice channels
• Provision channel bandwidth based on number of
  users and their data application requirements
• The modulation scheme can adapt to radio
  transmission conditions

8
How do data, range, bandwidth vary?
600 kb/s
Framing Rate
500 kb/s
150 kHz
400 kb/s
Modulation schemes 64QAM 16QAM 4QAM D8PSK (25 kHz)
300 kb/s
100 kHz
200 kb/s
50 kHz
100 kb/s
25 kHz
Range (km)
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How does this compare with TETRA 1?
600 kb/s
Framing Rate
500 kb/s
150 kHz
400 kb/s
Modulation schemes 64QAM 16QAM 4QAM D8PSK (25 kHz)
300 kb/s
100 kHz
200 kb/s
50 kHz
100 kb/s
25 kHz
Range (km)
TETRA 1
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The Key Points

• Modulation scheme can adapt dynamically to RF
  conditions
• As soon as the TETRA 1 curve starts to fall off,
  voice service is gone
• but data can still work with quite high MER
  (Message Error Rate) numbers due to
  retransmissions.
• For TETRA 1, the packet data coverage can be
  better than voice coverage
• For TETRA 2, the same trend is visible

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TETRA2 brings new capabilities to Fire
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TETRA2 brings new capabilities to Ambulance
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Other Additional Applications of TETRA 2
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The Power of TETRA 2
TETRA 1 TETRA 2 at 25 kHz
TETRA 2 at 150 kHz
TETRA 2 at 50 kHz
TETRA 2 at 100 kHz
TETRA 2 at 100 kHz
TETRA 2 at 50 kHz
TETRA 2 at 150 kHz
Legend Circle size coverage area Circle height
data capacity
All TETRA 2 sites includes TETRA 1
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Planning for TETRA 2

• High channel bandwidth gives high data capacity
• Supports the high data rates needed by multimedia
  applications
• Gives better trunking efficiency for network
  operators means lower bills for end users?
• Application developers need to design for
• different data rates available under different
  conditions
• Handing over seamlessly as user moves around
  network
• Being aware of cell reselection criteria

16
TETRA 2 Data Application influences Cell
Handover
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TETRA 2 Standardisation

• Stable Technical Standard for TETRA 2 due from
  ETSI by end 2004
• The Technical Standard will then enter the Public
  Enquiry (PE) phase, which is
• Chance for final comments by those organisations
  not participating in specification work
• High-level assessment of the standard, does it
  meet goals, are goals still valid etc
• Last minute check of technical details
• PE comments can be submitted via National
  Standards Organisations
• Successful PE phase results in a Harmonised
  Standard (due Q4 2005)
• Base Stations and subscribers can be CE marked
  and placed in the European Economic Area
  marketplace

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Benefits of Integrated Voice and Data in TETRA

• Voice and data applications on the same radio
• Less equipment to carry
• Common security measures for all services
• Government approved security measures rather than
  just commercial level
• Secure authentication and encryption for
  signalling, voice and data
• User benefits from high level of security for all
  data traffic
• No need to worry about which applications are
  allowed to use which data service
• No need to worry that users might be sending
  sensitive information over unsecured data services

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Conclusion

• TETRA release 1 already enables sophisticated
  mission critical data applications
• and is already being used today to save lives
• TETRA 2 will enhance existing data capabilities
  and enable new advanced applications
• Standards are nearly ready, end users should
  start influencing manufacturers by explaining
  their future needs and requirements
• TETRA users and manufacturers need to start
  planning now and lobbying for TETRA 2 spectrum

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TETRA is an expanding universe
From Big Bang through to TETRA 3 and beyond
Come back next year to see what happens.