Definitions, Concepts and Applications of TETRA

Hannu Villpunen

Nokia

14.11.2001

Agenda

• TETRA and its objectives

• Standards

• TDMA technology

• Interoperability

• Voice communication services

• Data communication services

• Future

Objectives behind TETRA standard

• Define a digital Professional Mobile Radio (PMR) standard to satisfy the current and future needs of all PMR users across Europe

• Unite fragmented PMR markets into one common market - harmonized use of spectrum

• Fulfill European authority co-operation requirements (Schengen Treaty) to enable European Integration – cross-border operation using common frequency spectrum

And, TETRA is no longer limited to only Europe • TETRA has been

adapted by many countries outside Europe, especially in Asia

• Latin America and Africa also emerging

• In early 2001 TETRA was awarded industry standard status in China

• Several TETRA contracts in China already now

Core TETRA standards and standard interfaces•Voice plus data (V+D)•Direct Mode Operation (DMO)

•Conformance testing •TETRA Speech Codec•Packet Data Optimized (PDO)

AI

ISI

PEI

DMO

•Air Interface (AI)•Inter-System Interface (ISI)•Peripheral Equipment Interface (PEI)

Network A Network B

What makes TETRA unique

•Uncompromising security• authentication of radios (and networks)• air interface encryption, static or dynamic keys

• end-to-end encryption support• disabling of stolen radios

•Access to data from the field with IP packet data

•Unique communication package in total

•Instant group communication

•Fast call set-up time

•Direct Mode (DMO)

•Queuing of channel resources

•Pre-emptive priorities

TETRA TDMA principle

• 4:1 TDMA (Time Division Multiple Access)• 4 channels per 25 kHz carrier• 25 kHz carrier spacing• 4 voice calls per 25 kHz carrier• Data calls can use up to 4 channels

(multi-slot data)• Voice and Data can be transmitted

simultaneously

Four user channels multiplexedinto one 25 kHz carrier

SPECTRUMEFFICIENCYSPECTRUMEFFICIENCY

4 channels12

3 4

36 kbits/sgross bit

rate

Carrier

Technology developmentTechnology development

Interoper-abilitytests

Interoper-abilitytests

Road to interoperability

Use

rre

quir

em

ents

ETSI standardisation

process

ETSI standardisation

process

Use

r and

regula

tory

requir

em

ents

ManufacturersimplementationsManufacturers

implementations

Use

rre

quir

em

ents

Standard

MARKET

Products and

features

Interoperabilityprofiles under

TETRA MoU

Interoperabilityprofiles under

TETRA MoU

Interoperability between products and features

Interoperability in practice

TETRA interoperability demonstration at TETRA World Congress, 16-18.11.1999, Amsterdam Today we have wide

participation in the interoperability work

TETRA service classification•TETRA is not only a radio access standard, it is

also a standard defining the services and functionality

Bearer services = data transport:

- packet, circuit, single/multi-slot

Bearer services = data transport:

- packet, circuit, single/multi-slot

Teleservices = voice calls:

- one-to-one, group, broadcast

Teleservices = voice calls:

- one-to-one, group, broadcast

Nearly 30 supplementary services:- priority set 1 of supplementary services

(priorities, late entry, DGNA, …)- fleet services- telephony supplementary services

Nearly 30 supplementary services:- priority set 1 of supplementary services

(priorities, late entry, DGNA, …)- fleet services- telephony supplementary services

Voice communication services• Excellent voice quality

• Fast call set-up• Individual (one-to-one)

calls• Express calls (push and

talk)• Group communication

• group calls• broadcast groups• scanning of groups• dynamic regrouping• group area• open channel

• Emergency calls• Direct mode• Supplementary services

Data communication services

•Status service - efficient, real time

•Short Data Service, SDS - text messaging + application vehicle

•IP packet data - opens the world of Internet

connectivity

•Circuit mode data - for specialized applications like video

surveillance

36 kbits/sgross bit

rate

1 2

34

•Intra/Internet access, work orders, fleet management, reporting

•Specialised application houses

• Open application interfaces

•Database access, work orders, fleet management, reporting

End-to-end applications for end-user needs

Enhanced services with TETRA Release 2

•ETSI board decided to initiate standardisation of TETRA Release 2

•fast packet data --> next generation for professional users

•improved 3G cellular interworking•voice coding, gateways, SIM card

•radio network performance improvement study project

•rural long range cells

•ETSI work continues under updated Terms of Reference

•Future-safe technology - time to start roll-outs is now

Conclusions• TETRA is the global open

standard for digital professional radio communications

• mission critical voice and group dispatch

• mobile telephony

• advanced data transfer and applications

• Real and open multi-vendor supply

• TETRA brings Internet access to mobile workforce

• TETRA is secure

TETRA is ready, TETRA is future-proof, TETRA is global

TETRA is ready, TETRA is future-proof, TETRA is global