November 2006

TETRA Data Today and Tomorrow

Mark Edwards Principal Staff Engineer Motorola European System Design Centre 1

TETRA Evolution to Meet Market Needs

TETRA 1 Circuit data TETRA 1 SDS TETRA 1 Single slot PD TETRA 1 Multislot PD Today!

Higher Speed Data

Database search AVL Email File transfer e.g

Still images Slow scan video Streaming video Not suitable Possible Appropriate

Available Data Capabilities

PD Prioritisation High priority applications are guaranteed access Multi-slot PD Channels Up to 4 times throughput Dynamic PD CH Allocation Static PD Channel Allocation Shared PD Channel IP Packet Data Short Data Flexible resource allocation Guaranteed grade of service Greater efficiency Greater data throughput Reliable communication Resource efficient Simultaneous Voice Data Communication Fast pre/defined messages Status Messaging Advanced Basic

Shared PD Channels: Reduce Cost

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Simultaneous transactions over packet data channel

– Police officer queries a database and waits for a result – Police vehicle sends an AVL report to a location server 

Basic: (Dedicated)

– The police officer makes his query and waits for the result – Meanwhile, nobody else can make use of the PD channel until this transaction finishes.

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Advanced: (Shared)

– At the same time the police officer is waiting for his database response, the police car can be sending its AVL – Many users can share the PD channel simultaneously in this way

Shared Access

This could be a data base inquiry Slot 1 Slot 2 Slot 3 Slot 4 Voice Group 1 Voice Group 2 Voice Group 1 Voice Group 2 This could be a response to the data base inquiry Slot 1 Slot 2 Slot 3 Slot 4

 shared access uses PD channel capacity more efficiently  more users can share the PD channel  less spectrum and hardware

Multislot Packet Data (MSPD)

  Same functionality as single slot packet data – but faster Packet Data channel bandwidth is increased up to 4 times – Combining up to 4 single slots (i.e. timeslots) in one packet data channel   Dynamically change the number of slots as voice load varies Co-existence of single and multi slot packet data in whole network – Separate network resources for single and multi slot at each site – A multislot radio can operate on a single slot channel if necessary – Handover seamlessly between sites, even when the number of timeslots is different

Enables sophisticated mission critical data applications

Multislot Packet Data Applications

Single Slot Packet Data Multislot Packet Data Report and text data base enquiries

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Reports sent when traffic allows

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Enquiry response when traffic allows

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Reports sent without delay

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Enquiry responses much sooner Simplified and faster information flow Image database to verify a suspects ID

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Limited usefulness: It takes a long time to download a useable image

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Useable if download time isn’t critical

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Detailed images in an acceptable transfer time

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Highly detailed images download faster Patrol Officers can swiftly identify a suspect Slow Scan Video for surveillance

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Display freezes for long periods

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Low quality images

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Real time video reception

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Good image quality Good perception of incidents from field cameras

GPRS and TETRA data rates are similar

TETRA Multi slot (Slotted semi duplex) GPRS GPRS Class 3 MS (2 down, 2 up)

Above L2 (peak): 15.2 kbps Above L2 (peak): 15.2/23.2 kbps (CS-1/CS-2)

GPRS Class 4 MS (3 down, 1 up)

Above L2 (peak) DOWN: 22.8/34.8 kbps (CS-1/CS-2) Above L2 (peak) UP: 7.6/11.6 kbps (CS-1/CS-2)

Peak = the peak bit rate on the IP channel. User’s bit rate depends on application protocols

 TETRA has mission critical features that GPRS lacks, i.e. enhanced security, availability, resilience  TETRA shares this bandwidth with less users than GPRS

Multislot Packet Data

 Same interactions as single slot packet data – Voice priority over data – SDS messages can be carried in spare capacity on packet data channels  Higher data rate enables more advanced applications  MSPD already defined within the TETRA standard – TIP (TTR 001-05) is approved – enables multi-vendor terminal solution

TETRA 2 comparison with TETRA 1

Framing Rate

600 kb/s 500 kb/s

150 kHz

400 kb/s 300 kb/s

Modulation schemes

64QAM 16QAM 4QAM

100 kHz

200 kb/s 100 kb/s 28.8 kb/s

50 kHz 25 kHz TETRA 1 Range (km)

Network Upgrade to TETRA 2

Users want to expand networks and support new services and applications – Protect investment – Ease of upgrade TETRA2 standard was developed with upgrade in mind – new base stations are high speed data ready – software upgrade for base stations and core

TETRA fulfilling Mission Critical Needs

 TETRA IP data – TETRA single slot packet data provide basic data applications  TETRA Now –

Present and future

– TETRA multi slot packet data provide sophisticated data applications  TETRA In the Future –

Looking towards the horizon

– TETRA 2 innovation for new data applications

Spectrum for TETRA2

 A challenge to be met by each country  Spectrum requirement for a nationwide TETRA 2 network – At least 2 x 1 MHz, but 2 x 2 MHz would be better – Close to the TETRA 1 spectrum (350 MHz in China)  ETSI analysis on requirements (TR 102 513)  Now is a good time for operators and users to begin talking to regulators and the TETRA MoU

TETRA Roadmap for Data

1995 First TETRA contract TETRA V&D standard TIP IOP Future 2005 MSPD delivered 2000 First IP delivered IP Service standard TIP IOP MSPD standard TIP IOP Higher Speed Packet Data standard TIP IOP Evolutionary stages