November TETRA Data Today and Tomorrow Mark Edwards Principal Staff Engineer Motorola European System Design Centre

Slow scan video TETRA 1 Multislot PD TETRA 1 Circuit data TETRA 1 SDS Streaming video File transfer e.g Still images AVL Database search Higher Speed Data TETRA 1 Single slot PD Not suitable PossibleAppropriate TETRA Evolution to Meet Market Needs Today!

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

Shared PD Channels: Reduce Cost  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.  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  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

Slot 1 Slot 2 Slot 3 Slot 4 Slot 1 Slot 2 Slot 3 Slot 4 Voice Group 2 Voice Group 1 This could be a data base inquiry This could be a response to the data base inquiry  shared access uses PD channel capacity more efficiently  more users can share the PD channel  less spectrum and hardware Shared Access

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  Reports sent without delay  Enquiry responses much sooner  Reports sent when traffic allows  Enquiry response when traffic allows Simplified and faster information flow  Detailed images in an acceptable transfer time  Highly detailed images download faster  Limited usefulness: It takes a long time to download a useable image  Useable if download time isn’t critical Patrol Officers can swiftly identify a suspect Image database to verify a suspects ID Report and text data base enquiries Single Slot Packet DataMultislot Packet Data Slow Scan Video for surveillance Good perception of incidents from field cameras  Real time video reception  Good image quality  Display freezes for long periods  Low quality images

GPRS and TETRA data rates are similar TETRAGPRS Multi slot (Slotted semi duplex)GPRS Class 3 MS (2 down, 2 up) Above L2 (peak):15.2 kbpsAbove 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 ) is approved –enables multi-vendor terminal solution

TETRA 2 comparison with TETRA 1 Range (km) Modulation schemes 64QAM 16QAM 4QAM 600 kb/s 500 kb/s 300 kb/s 200 kb/s 400 kb/s 100 kb/s Framing Rate 150 kHz 100 kHz 50 kHz 25 kHz TETRA kb/s

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 )  Now is a good time for operators and users to begin talking to regulators and the TETRA MoU

TETRA Roadmap for Data TETRA V&D IP Service MSPD Higher Speed Packet Data 1995 First TETRA contract 2000 First IP delivered Future 2005 MSPD delivered standardTIPIOP standardTIPIOP standardTIPIOP standardTIPIOP Evolutionary stages