TETRA ENHANCED DATA SERVICE TEDS

1
TETRA ENHANCED DATA SERVICE (TEDS)
TEDS COLLOQUIUM

• Dr. M. Nouri
• Chairman of EPT Working Group 4 (WG4)
• High Speed Data

2
Agenda

• TETRA Release 2 Terms of Reference.
• User Requirements for High Speed Data (HSD).
• Technologies for HSD (TAPS and TEDS).
• Developments in TEDS Standardisation.
• TEDS Technology Solution and Parameters.
• Conclusions.

3
Rationale for TETRA Release 2

• In a fast moving Telecommunications world to
  provide TETRA community with emerging wide-band
  and multi-media services.
• To prolong the life cycle of TETRA technology.
• To provide an upgrade path to TETRA VD users.
• To provide inter-working with new public mobile
  networks (2.5G / 3G).
• To ensure future proof investment to TETRA users.
• Glean benefits of new technology deployments.

4
EP TETRA Revised Terms of Referenceapproved at
Board28

• To provide packet data at much higher speeds than
  are available in the current standard (10 fold
  increase).
• To select and standardize additional speech
  codec(s).
• To further enhance the TETRA air interface
  standard.
• To produce and/or adopt standards to provide
  improved TETRA interworking and roaming with GSM,
  2.5G/3G networks.
• To evolve the TETRA SIM to U-SIM.
• To extend the operating range of TETRA.
• To ensure full backward compatibility and
  integration with existing TETRA standards.

5
Two Track Standardisation
TETRA RELEASE 2
TAPS
TEDS

• TETRA Enhanced Data Service
• Full Compatibility with TETRA VD
• Allows migration from TETRA VD
• Standardisation in progress
• 5 technologies proposed initially
• Designed for all TETRA market
• sectors

• TETRA Advanced Packet Service
• An Overlay network
• Based on the E-GPRS technology
• Standardisation drafting completed
• Designed for PAMR market

6
TETRA in 3G Era
Network Management
TETRA1 Access
Gateway
TETRA Infrastructure
3G Access
GSM Access
2.5G Access
TAPS Access
TETRA1 TEDS Access
7
TAPS Architecture Interfaces
8
Developments in TEDS Standardisation

• A review of the User Requirements to reflect
  changing market conditions and resolve
  conflicting issues.
• A TETRA Release 2 User Workshop was jointly
  organised with WG1 resulting in
• Most applications in early systems will be
  satisfied with a 50 to 80 kbit/s user rate
• Minimum of 50 kbit/s shall be available at the
  edge of coverage
• Adaptive technology and higher data rate should
  also be provided by the selected technology for
  future proofing
• Need for simultaneous voice and HSD operation
  with priority for voice if required
• 1W maximum transmit power for handsets and
  possibly 3W maximum for vehicular radio.
• Technology submissions were revised taking these
  factors into account.

9
TEDS Technology Solution

• In July 4 2002 WG4 reached a consensus on a
  technology solution.
• This was based on a compromise solution agreed by
  six companies who had submitted technology
  proposals.
• WG4 then raised a Work Plan for the remaining
  standardisation issues
• Remainder of the physical layer
• Higher layer protocols
• Adaptive usage of system resources.
• This plan makes as much use of existing TETRA VD
  standard as possible to ensure backward
  compatibility (e.g. use of TETRA VD control
  channel).

10
Selected Technology Parameters (1)

• Multi-carrier platform with TDMA carriers.
• Adaptive selection of modulation and coding
  according to propagation conditions.
• Agreed modulation schemes
• 4 QAM for efficient links at edge of coverage
• 16 QAM for moderate speeds
• 64 QAM for high speed
• ?/4 DQPSK for common control channel
• D8PSK for early migration requiring modest
  increase in speed
• Optimised channel coding is under STF 179 work.
• Carrier bandwidths 25, 50, 100 and 150 kHz.

11
Selected Technology Parameters (2)

• Pilot symbol used for channel estimation.
• Full and half slot sizes
• 14.176 ms for 25 kHz and possibly 50 kHz with low
  level modulation,
• 7.08 ms for higher bandwidth carriers and higher
  level modulations.
• Each QAM carrier is composed of a number of
  sub-carriers at base-band (8 sub-carriers in 25
  kHz).
• Expected user bit rates in the region of 30 to
  400 kbit/s
• TETRA VD higher layer protocols to be adapted
  for TEDS.

12
STF Support for TEDS Standardisation

• Optimised Channel Coding and Interleaving for
  TEDS Carriers
• TETRA Release 2 TEDS Protocol Adaptation
  (excluding the Physical Layer)
• Adaptive Link Control for TEDS
• Use of Multi-media Services in a TEDS System

13
TEDS Standardisation Timeline(2003)
14
Summary

• Set of TETRA Release 2 User Requirement
  Specifications (URS) (mainly for TEDS) has been
  created by the EPT and TETRA users.
• TAPS overlay High Speed Data standardisation has
  been completed in WG4.
• The physical layer technology for TEDS integrated
  (with TETRA VD) solution has been selected and
  work on other areas is well underway.
• Four STF support projects have been identified
  and are in various stages of progress.
• TEDS integrated HSD standardisation is currently
  scheduled for completion by the end of 2003.

15
TETRA Enhanced Data Service Thank You Mehdi Nouri
16
TETRA TEDS COLLOQUIUM User Requirements
Jo Dewaele Chairman EPT Working Group 1
17
TETRA 2 High Speed Data (HSD)

• Definition
• net data rates in excess of 28,8 kbps which is
  the current capability of TETRA 1
• Objective
• provide high speed packet data at speeds
  approximately 10 times that available in existing
  TETRA
• Conflicting requirements
• pressing market needs for high-speed packet data
  within short timescales
• integrated solution with existing TETRA services
• Two streams
• TAPS TETRA Advanced Packet Service
• TEDS TETRA Enhanced Data Service

18
TAPS Coverage Analysis

• (E)GPRS
• up to 473kbps/carrier (200kHz) or 60kbps/timeslot
• Number of basestations to cover 30 000 km2
  (Belgium)

19
TEDS TETRA Enhanced Data Service

• Requirements evolution
• Market Questionnaire to EPT and TETRA MoU
• ETSI/TETRA MoU High Speed Data Workshop
• Documents
• User Requirement Specification
• HSD Workshop Report
• Marketing Selection Criteria

20
TEDS User Requirement Specification

• Requirements
• data rates high
• capacity high
• integration with TETRA Release 1 VD high
• availability of HSD early
• Constraints
• compatibility with TETRA Release 1 VD
• field upgrade capability with minimal disruption
• minimal need for new base station sites
• minimal need for new frequency spectrum

21
TEDS Coverage Analysis
22
TEDS HSD Workshop conclusion

• WG4 working assumptions
• deploy HSD on existing TETRA 1 base stations
• maximum terminal power 1W for handportable, 3 W
  for mobile
• trade off between spectrum, data rates and range
  is needed
• realistic target data rates are in the range of
  50-150 kbit/s
• extra spectrum is essential

23
TEDS Coverage Analysis

24
TEDS Marketing Selection Criteria

• Mandatory Criteria
• Backward compatibility
• Service flexibility
• Security compatibility
• As marketable as Release 1
• Other important Criteria
• Ease of Infrastructure upgrade
• Minimal need for new base station sites
• Flexible user net data rate/performance
• Efficient and flexible use of spectrum resources
• Mobile Station provision ease

25
TETRA TEDS COLLOQUIUM User Requirements Thank
You Jo Dewaele