TETRA ENHANCED DATA SERVICE (TEDS)

1

TETRA ENHANCED DATA SERVICE (TEDS)

Dr. M. NouriChairman of EPT Working Group 4 (WG4)

High Speed Data

TEDS COLLOQUIUM

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 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

EP TETRA Revised Terms of Referenceapproved 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

Two Track Standardisation

TETRA RELEASE 2TETRA RELEASE 2

TAPSTAPS TEDSTEDS

• 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

TETRA in 3G Era

TETRAInfrastructure

TETRAInfrastructure

Gateway

TAPSAccessTAPS

Access

GSMAccessGSM

Access

ServiceNodes

ServiceNodes

Customer Care BillingCustomer

Care Billing

NetworkManagement

NetworkManagement

UMTS Core NetworkTransit Layer

UMTS Core NetworkTransit Layer

NetworkManagement

NetworkManagement

TETRA1+TEDSAccess

TETRA1+TEDSAccess

TETRA1AccessTETRA1Access

3GAccess

3GAccess2.5G

Access2.5G

Access

7

TAPS Architecture & Interfaces

External Packet Data NetworksExternal Packet Data Networks

GSM/E-GPRS

GSM/E-GPRS

TETRAV+D

TETRAV+D

Gi GiGi

ISI(Gr)

IPI(Gp)

Gp

Gr

TAPS OVERLAY

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

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

TASKS Q1 Q2 Q3 Q4Protocols AdaptationRadio Link ControlMulti-media ServicesNon STF (WG4 part)Current ongoing STF

STF requirements for 2003

Note: The tasks shown are in elapsed times

Approval Stage

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

TETRA Enhanced Data Service

Thank YouMehdi 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)

MobileMobileTelephonyTelephony

(Full Duplex Voice)(Full Duplex Voice)

16

Jo Dewaele

Chairman EPT Working Group 1

TETRA TEDSCOLLOQUIUM

User Requirements

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)

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 km2 MSC-6A 236.8 29.6 124.5 dB 1.44 km 5.39 km2 MSC-7B 358.4 44.8 118.5 0.98 km 2.5 km2 MSC-8A 435.2 54.4 114 dB 0.73 km 1.38 km2 MSC-9A 473.6 59.2 110 dB 0.56 km 0.81 km2

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 km2 380 MSC-5B 179.2 22.4 1.69 km 7.42 km2 4043 MSC-6A 236.8 29.6 1.44 km 5.39 km2 5565 MSC-7B 358.4 44.8 0.98 km 2.5 km2 12000 MSC-8A 435.2 54.4 0.73 km 1.38 km2 21739 MSC-9A 473.6 59.2 0.56 km 0.81 km2 37037

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 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

TEDS: Coverage Analysis

TE D S C overage A nalys is 25 - 150 kH z channels

0

2000

4000

6000

0 100 200 300 400 500 600 700 800

A vailab le b it rate [kb /s]

Ra

ng

e (

me

tre

s)

150 kH z

M S 1W E R P ; 2% B E R : TU 50; u rban propagation

100 kH z50 kH z25 kH z

TE TR A 1

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

TEDS Coverage Analysis - 50 kHz channel

61 kb/s

86%of area

TETRA 1 area

28.8 kb/s

76 kb/s

64%of area44%of area

73%of area

113 kb/s

19%of area

130 kb/s

200 kb/s

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 TEDSCOLLOQUIUM

User Requirements

Thank YouJo Dewaele