TETRA ENHANCED DATA SERVICE _TEDS_ - PowerPoint Presentation

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					          TEDS COLLOQUIUM



TETRA ENHANCED DATA SERVICE
           (TEDS)
               Dr. M. Nouri
   Chairman of EPT Working Group 4 (WG4)
              High Speed Data




                                           1
                    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.




                                                   2
   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 V+D 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.



                                                         3
    EP TETRA Revised Terms of Reference
           approved at Board#28

 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.




                                                                        4
             Two Track Standardisation

                              TETRA RELEASE 2




              TAPS                                   TEDS




                                          • TETRA Enhanced Data Service
• TETRA Advanced Packet Service           • Full Compatibility with TETRA V+D
• An Overlay network                      • Allows migration from TETRA V+D
• Based on the E-GPRS technology          • Standardisation in progress
• Standardisation drafting completed      • 5 technologies proposed initially
• Designed for PAMR market                • Designed for all TETRA market
                                          • sectors




                                                                                5
                         TETRA in 3G Era

                 Network
               Management
Service                          Customer
Nodes                            Care Billing




          UMTS Core Network                         Network
                                                   Management    TETRA1
                                                                 Access
            Transit Layer                 Gateway



                              3G
                                                    TETRA
     GSM
    Access
                 2.5G       Access              Infrastructure
                Access
                                                                  TETRA1
                                          TAPS
                                                                   +TEDS
                                         Access                   Access
                                                                           6
            TAPS Architecture & Interfaces


                  External Packet Data Networks
                Gi                    Gi          Gi
TETRA            IPI
 V+D             (Gp)
                              TAPS OVERLAY   Gp

         ISI                       TETRA                GSM/
         (Gr)                       V+D                E-GPRS

                                             Gr



Gi, Gp & Gr: standard interfaces
used in E-GPRS networks



                                                                7
  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.
                                                                         8
        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 V+D
  standard as possible to ensure backward compatibility
  (e.g. use of TETRA V+D control channel).


                                                          9
  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.



                                                                10
   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 V+D higher layer protocols to be adapted for
  TEDS.




                                                               11
 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




                                                       12
        TEDS Standardisation Timeline
                  (2003)

       TASKS                 Q1              Q2   Q3   Q4
Protocols Adaptation
Radio Link Control
Multi-media Services
Non STF (WG4 part)
Current ongoing STF


          STF requirements for 2003

          Approval Stage

Note: The tasks shown are in elapsed times




                                                            13
                      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
  V+D) 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.




                                                                      14
                  Mobile Radio
               (Group, Individual,
              Priority, Emergency,
                      DMO)



          Mobile              Mobile Data
                       (Status Massaging,SDTS,
        Telephony           Packet Mode,
   (Full Duplex Voice)       Circuit Mode)




TETRA Enhanced Data Service


         Thank You
            Mehdi Nouri


                                                 15
  TETRA TEDS
  COLLOQUIUM
User Requirements

         Jo Dewaele
Chairman EPT Working Group 1




                               16
    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


                                                              17
                TAPS: Coverage Analysis


  (E)GPRS
          up to 473kbps/carrier (200kHz) or 60kbps/timeslot
Coding     User Data Rate    User Data Rate    Path Loss      Cell Radius      Cell Area
            (per carrier)       (per slot)
                                                                                       2
MSC-5B         179.2              22.4          127 dB          1.69 km        7.42 km
                                                                                       2
MSC-6A         236.8              29.6         124.5 dB         1.44 km        5.39 km
                                                                                      2
MSC-7B         358.4              44.8           118.5          0.98 km         2.5 km
                                                                                       2
MSC-8A         435.2              54.4          114 dB          0.73 km        1.38 km
                                                                                       2
MSC-9A         473.6              59.2          110 dB          0.56 km        0.81 km



  Number of basestations to cover 30 000 km2 (Belgium)
Coding      User Data Rate    User Data Rate   Cell Radius   Cell Area    Number of BS
             (per carrier)       (per slot)
                                                                    2
TETRA 1          28.8               7.2           5 km        78 km           380
                                                                     2
MSC-5B          179.2              22.4          1.69 km     7.42 km          4043
                                                                     2
MSC-6A          236.8              29.6          1.44 km     5.39 km          5565
                                                                    2
MSC-7B          358.4              44.8          0.98 km      2.5 km         12000
                                                                     2
MSC-8A          435.2              54.4          0.73 km     1.38 km         21739
                                                                     2
MSC-9A          473.6              59.2          0.56 km     0.81 km         37037
                                                                                           18
 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




                                                 19
 TEDS: User Requirement Specification


 Requirements
      data rates: high
      capacity: high
      integration with TETRA Release 1 V+D: high
      availability of HSD: early


 Constraints
      compatibility with TETRA Release 1 V+D
      field upgrade capability with minimal disruption
      minimal need for new base station sites
      minimal need for new frequency spectrum




                                                          20
                     TEDS: Coverage Analysis


TEDS Coverage Analysis 25 - 150 kHz channels
 Range (metres)   6000



                  4000


                                                 150 kHz
                  2000
                              25 kHz
                                       50 kHz         100 kHz
                             TETRA 1
                    0
                         0     100     200      300      400    500      600   700   800
                                             Available bit rate [kb/s]

                  MS 1W ERP; 2% BER: TU50; urban propagation


                                                                                           21
   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




                                                              22
TEDS: Coverage Analysis




                          23
  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



                                                          24
  TETRA TEDS
  COLLOQUIUM
User Requirements


  Thank You
    Jo Dewaele




                    25

				
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