cupdf.com_tetra-enhanced-data-service-teds-5689e2a49ebfe.ppt

radio

1. 1
TETRA ENHANCED DATA SERVICE
(TEDS)
Dr. M. Nouri
Chairman of EPT Working Group 4 (WG4)
High Speed Data
TEDS COLLOQUIUM

2. 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. 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 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.

4. 4
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.

5. 5
Two Track Standardisation
TETRA RELEASE 2
TAPS TEDS
• TETRA Advanced Packet Service
• An Overlay network
• Based on the E-GPRS technology
• Standardisation drafting completed
• Designed for PAMR market
• TETRA Enhanced Data Service
• Full Compatibility with TETRA V+D
• Allows migration from TETRA V+D
• Standardisation in progress
• 5 technologies proposed initially
• Designed for all TETRA market
• sectors

6. 6
TETRA in 3G Era
TETRA
Infrastructure
Gateway
TAPS
Access
GSM
Access
Service
Nodes
Customer
Care Billing
Network
Management
UMTS Core Network
Transit Layer
Network
Management
TETRA1
+TEDS
Access
TETRA1
Access
3G
Access2.5G
Access

7. 7
TAPS Architecture & Interfaces
External Packet Data Networks
GSM/
E-GPRS
TETRA
V+D
TETRA
V+D
Gi GiGi
ISI
(Gr)
IPI
(Gp)
Gp
Gr
TAPS OVERLAY
Gi, Gp & Gr: standard interfaces
used in E-GPRS networks

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

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

12. 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. 13
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
Note: The tasks shown are in elapsed times
Approval Stage

14. 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
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.

15. 15
TETRA Enhanced Data Service
Thank You
Mehdi Nouri
Mobile RadioMobile Radio
(Group, Individual,(Group, Individual,
Priority, Emergency,Priority, Emergency,
DMO)DMO)
Mobile DataMobile Data
(Status Massaging,SDTS,(Status Massaging,SDTS,
Packet Mode, Packet Mode,
Circuit Mode)Circuit Mode)
MobileMobile
TelephonyTelephony
(Full Duplex Voice)(Full Duplex Voice)

16. 16
Jo Dewaele
Chairman EPT Working Group 1
TETRA TEDS
COLLOQUIUM
User Requirements

17. 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. 18
TAPS: Coverage Analysis
(E)GPRS
up to 473kbps/carrier (200kHz) or 60kbps/timeslot
Number of basestations to cover 30 000 km
2
(Belgium)
Coding User Data Rate
(per carrier)
User Data Rate
(per slot)
Path Loss Cell Radius Cell Area
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
2


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

19. 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. 20
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

21. 21
TEDS: Coverage Analysis
TEDS Coverage Analysis 25 -150 kHz channels
0
2000
4000
6000
0 100 200 300 400 500 600 700 800
A vailab le b it rate [kb /s]
R
a
n
g
e

(
m
e
t
r
e
s
)
150 kH z
MS 1W ERP; 2% BER: TU50; urban propagation
100 kH z50 kH z
25 kH z
TETR A 1

22. 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. 23
TEDS: Coverage Analysis

TEDS Coverage Analysis -50 kHz channel
61 kb/s
86%of area
TETRA 1 area
28.8 kb/s
76 kb/s
64%of area
44%of area
73%of area
113 kb/s
19%of area
130 kb/s
200 kb/s

24. 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. 25
TETRA TEDS
COLLOQUIUM
User Requirements
Thank You
Jo Dewaele