Transcript TETRA Template

TETRA Data Today and Tomorrow
Mark Edwards
Principal Staff Engineer
Motorola European System Design Centre
November 2006
1
Today!
TETRA Evolution to Meet Market Needs
TETRA 1
Circuit data
TETRA 1
SDS
TETRA 1
Single slot PD
TETRA 1
Multislot PD
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
Flexible resource allocation
Static
PD Channel Allocation
Guaranteed grade of service
Shared PD Channel
Greater efficiency
Greater data throughput
IP Packet Data
Reliable communication
Resource efficient
Short Data
Simultaneous Voice Data
Communication
Status Messaging
Fast pre/defined messages
Advanced
Basic
Shared PD Channels: Reduce Cost
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.
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
Slot 1
Slot 2
Slot 3
Slot 4
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
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
Reports sent when traffic allows
Enquiry response when traffic allows
Reports sent without delay
Enquiry responses much sooner
Simplified and faster information flow
Image database to verify a suspects ID
Limited usefulness: It takes a long
time to download a useable image
Useable if download time isn’t critical
Detailed images in an acceptable
transfer time
Highly detailed images download
faster
Patrol Officers can swiftly identify a suspect
Slow Scan Video for surveillance
Display freezes for long periods
 Low quality images
Real time video reception
Good image quality
Good perception of incidents from field cameras
GPRS and TETRA data rates are similar
TETRA
GPRS
Multi slot (Slotted semi duplex)
GPRS Class 3 MS (2 down, 2 up)
Above L2 (peak):
Above L2 (peak):
15.2 kbps
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
Modulation schemes
64QAM
16QAM
4QAM
300 kb/s
100 kHz
200 kb/s
50 kHz
100 kb/s
25 kHz
28.8 kb/s
Range (km)
TETRA 1
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
Future
2005
MSPD
delivered
Higher Speed
Packet Data
2000
First IP
delivered
1995
standard
First TETRA
contract
TIP
MSPD
IP Service
standard
TIP
standard
TIP
IOP
IOP
TETRA V&D
standard
TIP
IOP
Evolutionary stages
IOP